Re: [Elecraft] [KX3] Case Doesn't Close Quite Right
I appreciate the replies. To answer a few questions: 1. Yes, I built it from a kit, it is S/N 14xx. I measured each screw before installation, but it looks like I must have missed something. 2. On the left side (as you're looking at the display), the panel does not seat flush with the top panel. It is raised perhaps 0.5 - 1 mm above the top panel. I don't know if that affected how I was trying to close it to make everything flush. 3. If I don't set the top just right on the bottom, it rocks a bit. If I do get it just right, it still rocks, but not quite as much. I have not been able to see what it is rocking on. In addition to the rocking, something catches and clicks. I didn't notice the click until I started trying to figure out about the gap from the original post. Hmm... I just took out the eight Eneloop 2400 mAh batteries and, although the rocking is still there, for the most part, the gap is gone and I don't hear the clicking. Yes, I realize I'm being anal about this. I guess I will start dis-assembling and see where I screwed up. 73, Joel - W4JBB On 5/11/14, 4:59 PM, Joel Black wrote: I've had my KX3 for a while now and I noticed the other day that where the bottom of the two halve meet up, there appears to be... Well, I'm not sure how to describe it. Near the speaker, it appears the two halves don't meet up as well as at the ends. If you look at the top half of the enclosure, it is beveled and slides *inside* the bottom half. At either end, they mate up well. Near the speaker, there appears to be a 3 - 4 mm gap where it doesn't appear to meet up as well. Am I describing that in a way that *anyone* understands? If it's normal, I'm good with that. However, if there's something I should check, I will. I have looked at the ribbon cable and it is folded the correct way. It is not pinched and the connectors seem to be fully seated. Maybe I'm mashing (Southern term) the ends together too far, but if I don't do that, the bottom of the sides and the bottom half of the enclosure don't meet up properly. I don't remember if I tried to mate the two halves without the batteries inside the radio. If needed, I can send pictures. 73, Joel - W4JBB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w4...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Case Doesn't Close Quite Right
I am sorry. In the following post, I should have stated that once I took out the Eneloops, the rocking is still there, but it has been greatly reduced. 73, Joel - W4JBB On 5/12/14, 5:20 AM, Joel Black wrote: I appreciate the replies. To answer a few questions: 1. Yes, I built it from a kit, it is S/N 14xx. I measured each screw before installation, but it looks like I must have missed something. 2. On the left side (as you're looking at the display), the panel does not seat flush with the top panel. It is raised perhaps 0.5 - 1 mm above the top panel. I don't know if that affected how I was trying to close it to make everything flush. 3. If I don't set the top just right on the bottom, it rocks a bit. If I do get it just right, it still rocks, but not quite as much. I have not been able to see what it is rocking on. In addition to the rocking, something catches and clicks. I didn't notice the click until I started trying to figure out about the gap from the original post. Hmm... I just took out the eight Eneloop 2400 mAh batteries and, although the rocking is still there, for the most part, the gap is gone and I don't hear the clicking. Yes, I realize I'm being anal about this. I guess I will start dis-assembling and see where I screwed up. 73, Joel - W4JBB On 5/11/14, 4:59 PM, Joel Black wrote: I've had my KX3 for a while now and I noticed the other day that where the bottom of the two halve meet up, there appears to be... Well, I'm not sure how to describe it. Near the speaker, it appears the two halves don't meet up as well as at the ends. If you look at the top half of the enclosure, it is beveled and slides *inside* the bottom half. At either end, they mate up well. Near the speaker, there appears to be a 3 - 4 mm gap where it doesn't appear to meet up as well. Am I describing that in a way that *anyone* understands? If it's normal, I'm good with that. However, if there's something I should check, I will. I have looked at the ribbon cable and it is folded the correct way. It is not pinched and the connectors seem to be fully seated. Maybe I'm mashing (Southern term) the ends together too far, but if I don't do that, the bottom of the sides and the bottom half of the enclosure don't meet up properly. I don't remember if I tried to mate the two halves without the batteries inside the radio. If needed, I can send pictures. 73, Joel - W4JBB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w4...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w4...@charter.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] For Sale: K2
For sale: Elecraft K2- S/N 05719. 80 through 10 meter Transceiver. Completed in 2006. Used mostly for Field Day and vacations. Includes KSB2 SSB board, KNB2 noise blanker, KAT2 internal auto-tuner, KIO2 RS-232 adapter and cable, Icom hand mike, DC cord with APP connectors, assembly/operating manual. Aligned and calibrated by Alan Wilcox PE, W3DVX in April, 2011. Excellent operating and cosmetic condition. Price $750.00 plus shipping. US only. PayPal OK. Phil N3ZP email phil-z at comcast dot net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 - Accessory Jack - How Many Wye Cables?
Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? Thanks Rich - N5ZC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
Yes so long as you aren't trying to send the same data to two devices. If you are trying to send band data to two devices, I'm not sure if that would work or not. Currently I have one which provides my amp with band data and the other side to my 6m preamp. I wanted to add RTTY from my MicroKeyer II and that comes via the ACC line so I'm awaiting the arrival of a second Wye for that. All three ports are independent data so no conflict. Pete, W1RM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Richard Thorne Sent: Monday, May 12, 2014 7:48 AM To: Elecraft Reflector Subject: [Elecraft] K3 - Accessory Jack - How Many Wye Cables? Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? Thanks Rich - N5ZC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
Rich, I assume you also have a KPA500 in the mix. The problem is not with adding another Y cable, but the possibility that the other device will interfere with the band signalling to the KPA500. If that other device has pullup resistors, that can create problems, especially if the pullups are to some voltage other than 5 volts. You may have to add isolating diodes to that device (the KPA500 does have those protection diodes on the band data lines). If it has no pullup resistors, then it may be OK. 73, Don W3FPR On 5/12/2014 7:48 AM, Richard Thorne wrote: Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
On Sun, 2014-05-11 at 22:06 -0700, Bill Turner wrote: I have always thought that roofing was a marketing ploy to imbue it with some kind of magical powers. Bill, These aren't the filters you are looking for... Move along... Sorry, I just had too inject that at this point in the discussion! It just seemed too funny not to... To get back on topic, As soon as someone here said they are 1st IF filters, all questions about them were answered... THANK YOU whoever said that. -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Good point. A true roofing filter would be in the antenna line. Repeaters have roofing filters, typically in the form of an extremely high Q resonant cavity. Chas - Original Message - From: David Cole d...@nk7z.net To: elecraft@mailman.qth.net Sent: Monday, May 12, 2014 8:43 AM Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood On Sun, 2014-05-11 at 22:06 -0700, Bill Turner wrote: I have always thought that roofing was a marketing ploy to imbue it with some kind of magical powers. Bill, These aren't the filters you are looking for... Move along... Sorry, I just had too inject that at this point in the discussion! It just seemed too funny not to... To get back on topic, As soon as someone here said they are 1st IF filters, all questions about them were answered... THANK YOU whoever said that. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] PAE KX3 Heatsink
Hi all, Some of you have ordered the PAE-Kx31 Heatsink, and the email addresses you gave are bouncing, so if you have not received an email from me in the last few days, please contact me off-list. All back-orders for the heatsink have now been filled and the heatsink is in stock. See you in Dayton! Howard Hoyt - WA4PSC www.proaudioeng.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] SSB/CW/PSK/RTTY Keying with N1MM
I while back I figured out how to do macros in N1MM to key the K3 and KX3 internal keyer and DVR. I posted my summary macros here: http://ellmore.net/na1dx/?p=469 The only issue is cancelling the execution of a macro. You can not use the normal ESC key to cancel a TX like you might do with N1MM using WinKey CW keyer or MMVARI/MTTY/FLDIGI. For non SSB modes, you need to use an external key attached to the K3/KX3. I use a straight key and just give it a quick tap. For SSB, just hit the PTT on a mic or external PTT connector like a foot paddle or hand switch. I also use similar macros with NaP3 now to work PSK/FSK/CW/SSB without any other decoder software other than the decoder built into the K3/KX3. I run Ham Radio Deluxe (without the Digital Master 780) and NaP3 as my non-contesting setup and have no issues. 73, Doug Ellmore, NA1DX d...@ellmore.net www.ellmore.net/na1dx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
This is an issue. If you have a band decoder, want to run the preamp, the amp, tuner, and say a Microham device. I have used multiple Y adapters successfully. Mike W0MU On 5/12/2014 6:04 AM, Don Wilhelm wrote: Rich, I assume you also have a KPA500 in the mix. The problem is not with adding another Y cable, but the possibility that the other device will interfere with the band signalling to the KPA500. If that other device has pullup resistors, that can create problems, especially if the pullups are to some voltage other than 5 volts. You may have to add isolating diodes to that device (the KPA500 does have those protection diodes on the band data lines). If it has no pullup resistors, then it may be OK. 73, Don W3FPR On 5/12/2014 7:48 AM, Richard Thorne wrote: Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@w0mu.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 and JT65 (JT9) power instability problem
I have set the K3/100 output power to 10W. When I start to send in JT65-mode the power rises slowly from 2W to 10W after few send/receive periods. After reaching the 10W the power stabilizes. Everything seems to work properly except the power instability, anyway I can have qso's with JT65 and JT9. The problem is not dependent of band I use (at least bands from 20m up). I wonder if there anything I can do for the little anoying problem? I have the newest firmware installed and I use the newest version of WSJT-X. 73 de OH9VD, Jarmo -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-and-JT65-JT9-power-instability-problem-tp7588963.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 and JT65 (JT9) power instability problem
the K3 is not like other rigs you must first set the K3's ALC to show 4 bars with the 5th bar flickering then set the pwr out to the power level you want to use On 5/12/2014 8:59 AM, OH9VD wrote: I have set the K3/100 output power to 10W. When I start to send in JT65-mode the power rises slowly from 2W to 10W after few send/receive periods. After reaching the 10W the power stabilizes. Everything seems to work properly except the power instability, anyway I can have qso's with JT65 and JT9. The problem is not dependent of band I use (at least bands from 20m up). I wonder if there anything I can do for the little anoying problem? I have the newest firmware installed and I use the newest version of WSJT-X. 73 de OH9VD, Jarmo GB 73 K5OAIS am Morgan __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Cool your KX3
For those interested in the story of the Cooler KX, I put up a small webpage at: www.ve7fmn.ca There is contact and order information on the page. Please send your comments to me directly to save bandwidth. Reviews of the Cooler can be found here: http://www.eham.net/reviews/detail/11702?page=2 Cheers, Fred, VE7FMN -- View this message in context: http://elecraft.365791.n2.nabble.com/Cool-your-KX3-tp7588376p7588965.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
I use two Ys. One side of the first Y goes from a K3 to a KAT500 and then the KAT500 goes to a KPA500. The other side of the K3 Y goes to a second Y that connects to a Top Ten Devices Band Aide and a US Interface Navigator. Occasionally with the K3 turned off my Top Ten Devices Band Aide relays buzz a bit. I haven't figured out why. But I leave the Band Aide antenna switch in one of the non auto settings when the K3 is powered off. I think the solution might be to power the Band Aide from a power strip controlled by the K3 power switch, or Y the P3 power connector. Or perhaps add some high-Z pullups on the band lines in the Band Aide. As Don mentions, pullups can be an issue, particularly when some devices are not always powered. No problem thus far with band voltages when the K3 is powered on. I leave my KAT500 powered (although I usually push the front panel power button to turn the LEDs off). When the KAT500 has DC power, the Band lines and AUXBUS are pulled up (using what the microcontroller data sheets call weak pullups), which draw only microAmperes. The KAT500 sleeps when its power is off, which is a very low current draw, but it wakes up when you press the DC power (MODE) button. 73 de Dick, K6KR -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Richard Thorne Sent: Monday, May 12, 2014 4:48 AM To: Elecraft Reflector Subject: [Elecraft] K3 - Accessory Jack - How Many Wye Cables? Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? Thanks Rich - N5ZC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] TIP, RING,RING, Sleeve plug
Hi to the group MY NEW 17 INCH HP LAPTOP AUDIO JACK TIP IS RIGHT CHANNEL SPKR RING 1 IS LEFT CHANNEL SPKR RING 2 IS GROUND SLEVE IS HOT MIC This has been a long week. Last week my 17 inch Toshiba lap top started random but serious failures. I reloaded it several times and even bought a new copy of Windows 8.1 but it failed again. I bought a new low priced 17 inch HP laptop from Best Buy, now have it fully loaded and so far it has been reliable. This morning I got the AF/MIC adaptor I home brewed to work. It is wired the same as the APPLE IPAD so the tip and first ring are speaker audio. The second ring is ground and the sleeve is the MICROPHONE hot lead. I had to home brew this as I could not find an adaptor that would fit my station layout. Parts were a problem to get out here in North Dakota so I ended up with $25 in parts and because I thought the adaptor was wired in the more sensible order of tip-ring-ring-gound I ended up reworking it many times. Again at least on my HP Laptop it is Tip and 1st ring for the speakers, second ring is ground and the sleeve is the hot side of the mic. I hope this information helps someone else avoid the problems I had.. Ken W0CZ w0cz at i29 dot net Sent from my iPad On May 5, 2014, at 2:01 PM, Phil Wheeler w...@socal.rr.com wrote: Yes, it can be a bit tricky since the HP laptop I have is *not* wired the way the 4-conductor iPhone mic jack is wired, but instead is wired as shown here http://h10025.www1.hp.com/ewfrf/wc/document?cc=usdlc=endocname=c01633145lc=enproduct=4033829tmp_track_link=ot_search Another approach is to use a usb sound card, like the Griffin iMic. Phil w7ox On 5/5/14, 11:40 AM, tom armour wrote: You probably want this adapter:http://www.radioshack.com/product/index.jsp?productId=12970495 But it is hard to tell without knowing what type of new computer you got. Tom - wa4ta From: w...@i29.net Date: Mon, 5 May 2014 13:14:52 -0500 To: Elecraft@mailman.qth.net Subject: [Elecraft] TIP, RING,RING, Sleeve plug Hi to the group I had my computer go bad and replaced it this week end. I have everything working except my old computer had separate AF and MIC jacks. My new computer has a combined AF/MIC jack. I need to find that kind of plug so I can build an adaptor but I don't even know what it is called and where to get one. I would hope it is something Radio Shack sells as that is the only place I can get parts without paying big shipping charges. 73 and thanks for your help. Ken W0CZ w0cz at i29 dot net Sent from my iPad __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@i29.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
I made a patch panel using adapters mounted on DIN rails from Winford Engineering. 73 Jim ab3cv On May 12, 2014, at 9:49 AM, W0MU Mike Fatchett w...@w0mu.com wrote: This is an issue. If you have a band decoder, want to run the preamp, the amp, tuner, and say a Microham device. I have used multiple Y adapters successfully. Mike W0MU On 5/12/2014 6:04 AM, Don Wilhelm wrote: Rich, I assume you also have a KPA500 in the mix. The problem is not with adding another Y cable, but the possibility that the other device will interfere with the band signalling to the KPA500. If that other device has pullup resistors, that can create problems, especially if the pullups are to some voltage other than 5 volts. You may have to add isolating diodes to that device (the KPA500 does have those protection diodes on the band data lines). If it has no pullup resistors, then it may be OK. 73, Don W3FPR On 5/12/2014 7:48 AM, Richard Thorne wrote: Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@w0mu.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to j...@jtmiller.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] HP Laptop Audio Jack layout
Hi to the group MY NEW 17 INCH HP LAPTOP AUDIO JACK TIP IS RIGHT CHANNEL SPKR RING 1 IS LEFT CHANNEL SPKR RING 2 IS GROUND SLEVE IS HOT MIC This has been a long week. Last week my 17 inch Toshiba lap top started random but serious failures. I reloaded it several times and even bought a new copy of Windows 8.1 but it failed again. I bought a new low priced 17 inch HP laptop from Best Buy, now have it fully loaded and so far it has been reliable. This morning I got the AF/MIC adaptor I home brewed to work. It is wired the same as the APPLE IPAD so the tip and first ring are speaker audio. The second ring is ground and the sleeve is the MICROPHONE hot lead. I had to home brew this as I could not find an adaptor that would fit my station layout. Parts were a problem to get out here in North Dakota so I ended up with $25 in parts and because I thought the adaptor was wired in the more sensible order of tip-ring-ring-gound I ended up reworking it many times. Again at least on my HP Laptop it is Tip and 1st ring for the speakers, second ring is ground and the sleeve is the hot side of the mic. I hope this information helps someone else avoid the problems I had.. Ken W0CZ w0cz at i29 dot net Sent from my iPad On May 5, 2014, at 2:01 PM, Phil Wheeler w...@socal.rr.com wrote: Yes, it can be a bit tricky since the HP laptop I have is *not* wired the way the 4-conductor iPhone mic jack is wired, but instead is wired as shown here http://h10025.www1.hp.com/ewfrf/wc/document?cc=usdlc=endocname=c01633145lc=enproduct=4033829tmp_track_link=ot_search Another approach is to use a usb sound card, like the Griffin iMic. Phil w7ox On 5/5/14, 11:40 AM, tom armour wrote: You probably want this adapter:http://www.radioshack.com/product/index.jsp?productId=12970495 But it is hard to tell without knowing what type of new computer you got. Tom - wa4ta From: w...@i29.net Date: Mon, 5 May 2014 13:14:52 -0500 To: Elecraft@mailman.qth.net Subject: [Elecraft] TIP, RING,RING, Sleeve plug Hi to the group I had my computer go bad and replaced it this week end. I have everything working except my old computer had separate AF and MIC jacks. My new computer has a combined AF/MIC jack. I need to find that kind of plug so I can build an adaptor but I don't even know what it is called and where to get one. I would hope it is something Radio Shack sells as that is the only place I can get parts without paying big shipping charges. 73 and thanks for your help. Ken W0CZ w0cz at i29 dot net Sent from my iPad __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@i29.net Sent from my iPad __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] TIP, RING,RING, Sleeve plug
I bought an adapter from Amazon for my HP laptop. I'm just lazy. Sent from my iPhone ...nr4c. bill On May 12, 2014, at 11:15 AM, w...@i29.net w...@i29.net wrote: Hi to the group MY NEW 17 INCH HP LAPTOP AUDIO JACK TIP IS RIGHT CHANNEL SPKR RING 1 IS LEFT CHANNEL SPKR RING 2 IS GROUND SLEVE IS HOT MIC This has been a long week. Last week my 17 inch Toshiba lap top started random but serious failures. I reloaded it several times and even bought a new copy of Windows 8.1 but it failed again. I bought a new low priced 17 inch HP laptop from Best Buy, now have it fully loaded and so far it has been reliable. This morning I got the AF/MIC adaptor I home brewed to work. It is wired the same as the APPLE IPAD so the tip and first ring are speaker audio. The second ring is ground and the sleeve is the MICROPHONE hot lead. I had to home brew this as I could not find an adaptor that would fit my station layout. Parts were a problem to get out here in North Dakota so I ended up with $25 in parts and because I thought the adaptor was wired in the more sensible order of tip-ring-ring-gound I ended up reworking it many times. Again at least on my HP Laptop it is Tip and 1st ring for the speakers, second ring is ground and the sleeve is the hot side of the mic. I hope this information helps someone else avoid the problems I had.. Ken W0CZ w0cz at i29 dot net Sent from my iPad On May 5, 2014, at 2:01 PM, Phil Wheeler w...@socal.rr.com wrote: Yes, it can be a bit tricky since the HP laptop I have is *not* wired the way the 4-conductor iPhone mic jack is wired, but instead is wired as shown here http://h10025.www1.hp.com/ewfrf/wc/document?cc=usdlc=endocname=c01633145lc=enproduct=4033829tmp_track_link=ot_search Another approach is to use a usb sound card, like the Griffin iMic. Phil w7ox On 5/5/14, 11:40 AM, tom armour wrote: You probably want this adapter:http://www.radioshack.com/product/index.jsp?productId=12970495 But it is hard to tell without knowing what type of new computer you got. Tom - wa4ta From: w...@i29.net Date: Mon, 5 May 2014 13:14:52 -0500 To: Elecraft@mailman.qth.net Subject: [Elecraft] TIP, RING,RING, Sleeve plug Hi to the group I had my computer go bad and replaced it this week end. I have everything working except my old computer had separate AF and MIC jacks. My new computer has a combined AF/MIC jack. I need to find that kind of plug so I can build an adaptor but I don't even know what it is called and where to get one. I would hope it is something Radio Shack sells as that is the only place I can get parts without paying big shipping charges. 73 and thanks for your help. Ken W0CZ w0cz at i29 dot net Sent from my iPad __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@i29.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@widomaker.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Well, You defenitely need those filters in the K3. When signals are strong and the band is busy, signals coming through the roofing filter (line S9+20dB) is said to pump the hardware AGC, even if you have the DSP filtering set to a small BW. Anyway, you can certainly hear that. Try it on CW, on 40m in the evening when there's a contest. You'll love the 400Hz roofing filter. 73 Arie PA3A Al Lorona schreef op 11-5-2014 23:03: What determines the bandwidth you hear at the loudspeaker? It's not your roofing filter, despite a continuing notion that it is. Dave Hachadorian's point in a post a few weeks ago was that you don't need a 1.8 kHz filter to get a 1.8 kHz bandwidth. You're free to set whatever bandwidth you want with any filter. Before rigs had DSP we got used to the idea that your crystal filter sets your bandwidth. That's not true any more. It sets your *maximum* bandwidth. You then have the freedom to narrow and position a bandwidth arbitrarily using the DSP controls [SHIFT and WIDTH or HI and LO]. Here's a true-false quiz: 1. I'm a contester, so I need a 1.8 kHz roofing filter in the K3. 2. I should purchase the 400 Hz filter if I like to operate CW with bandwidths of 300 - 400 Hz. 3. For SSB, the 2.7 and 2.8 kHz filters are 'too wide'. 4. I have the 2.7 kHz filter installed, so for best results I should set my WIDTH control for a passband of 2.7 kHz. 5. I can use my 2.7 kHz filter in CW mode with my LO=0.30 and HI=0.50 (that is, BW=0.20). __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Turner Sent: Monday, May 12, 2014 1:07 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood ORIGINAL MESSAGE: (may be snipped) On 5/11/2014 7:25 PM, Fred Jensen wrote: I too think roofing filters are really not well understood. REPLY: A large part of the misunderstanding is due to the name. Whoever chose the name roofing did a great disservice. A better name would simply be it's function: 1st I.F. filter. That's what it is and that's what it does. I have always thought that roofing was a marketing ploy to imbue it with some kind of magical powers. 73, Bill W6WRT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jso...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
Thanks for all the replies, I plan on connecting a band decoder to the 2nd wye and it only receives/monitors the band data, it doesn't send anything back to the rig. So it looks like a 2nd wye should do the trick. Thanks Rich - N5ZC On 5/12/2014 6:48 AM, Richard Thorne wrote: Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? Thanks Rich - N5ZC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rtho...@rthorne.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Jerry, Why do you say it has been corrupted? This is exactly the purpose for the Roofing Filters in the K3. Jack B, W6FB On May 12, 2014, at 9:33 AM, Jerome Sodus jso...@comcast.net wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Turner Sent: Monday, May 12, 2014 1:07 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood ORIGINAL MESSAGE: (may be snipped) On 5/11/2014 7:25 PM, Fred Jensen wrote: I too think roofing filters are really not well understood. REPLY: A large part of the misunderstanding is due to the name. Whoever chose the name roofing did a great disservice. A better name would simply be it's function: 1st I.F. filter. That's what it is and that's what it does. I have always thought that roofing was a marketing ploy to imbue it with some kind of magical powers. 73, Bill W6WRT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jso...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jackbrin...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
http://www.elecraft.com/K3/Roofing_Filters.htm On Mon, May 12, 2014 at 9:45 AM, Jack Brindle jackbrin...@me.com wrote: Jerry, Why do you say it has been corrupted? This is exactly the purpose for the Roofing Filters in the K3. Jack B, W6FB On May 12, 2014, at 9:33 AM, Jerome Sodus jso...@comcast.net wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Turner Sent: Monday, May 12, 2014 1:07 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood ORIGINAL MESSAGE: (may be snipped) On 5/11/2014 7:25 PM, Fred Jensen wrote: I too think roofing filters are really not well understood. REPLY: A large part of the misunderstanding is due to the name. Whoever chose the name roofing did a great disservice. A better name would simply be it's function: 1st I.F. filter. That's what it is and that's what it does. I have always thought that roofing was a marketing ploy to imbue it with some kind of magical powers. 73, Bill W6WRT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jso...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jackbrin...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to a...@cablespeed.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Jerry, Yes, the term has become corrupted and misunderstood over the years. That *is* exactly what the K3 filters do (protect the downstream circuits from strong out of passband signals), but is done using a much more narrow bandwidth at the 1st IF. If the operator never encounters signal levels in excess of S-9+30, there is no need for the roofing filter, but signals stronger than that are encountered commonly in contests and tuning through a DX pileup. If it were not for the Hardware AGC, they would overload the A-D converter causing the entire output to become garbage. With the Hardware AGC present, that is not going to happen, but strong signals within the 1st IF bandpass will cause pumping of the Hardware AGC as those signals come and go. In the K3, *that* condition is what the roofing filters will prevent. Bottom line, if you hear that pumping (and subsequent desensing of the receiver), you would benefit from a more narrow filter. 73, Don W3FPR On 5/12/2014 12:33 PM, Jerome Sodus wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Thank-you, Greg. Excellent. Jerry KM3K _ From: Greg [mailto:a...@cablespeed.com] Sent: Monday, May 12, 2014 12:52 PM To: Jack Brindle Cc: Jerome Sodus; elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood http://www.elecraft.com/K3/Roofing_Filters.htm On Mon, May 12, 2014 at 9:45 AM, Jack Brindle jackbrin...@me.com wrote: Jerry, Why do you say it has been corrupted? This is exactly the purpose for the Roofing Filters in the K3. Jack B, W6FB On May 12, 2014, at 9:33 AM, Jerome Sodus jso...@comcast.net wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
No problem Jerry. Didn't seem to make much sense hashing out something that was already clarified by the designers. :) 73 Greg On Mon, May 12, 2014 at 9:59 AM, Jerome Sodus jso...@comcast.net wrote: Thank-you, Greg. Excellent. Jerry KM3K -- *From:* Greg [mailto:a...@cablespeed.com] *Sent:* Monday, May 12, 2014 12:52 PM *To:* Jack Brindle *Cc:* Jerome Sodus; elecraft@mailman.qth.net *Subject:* Re: [Elecraft] [K3] Roofing filters are misunderstood http://www.elecraft.com/K3/Roofing_Filters.htm On Mon, May 12, 2014 at 9:45 AM, Jack Brindle jackbrin...@me.com wrote: Jerry, Why do you say it has been corrupted? This is exactly the purpose for the Roofing Filters in the K3. Jack B, W6FB On May 12, 2014, at 9:33 AM, Jerome Sodus jso...@comcast.net wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Re; K2 Knob/shaft diameter
Iread somewhere on the list that the newer encoders for the K2 had larger diameter shafts then the older models. What is the shaft diameter of the newer encoders. Want to replace the main knob with one of the newer solid steel/brass knobs. Mike KD8DVV H. Michael Pierce __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
Rich, Power up your planned band decoder standalone and measure the voltage at its band data inputs. If you see zero volts (or very close to that), then it will be OK as long as those inputs will not source too much current when the K3 band data lines are low. OTOH, if you measure a voltage with the band decoder standalone, it may cause problems. In a system with pullup resistors at the drivers, there is always a concern for noise introduced on the signal line with additional receivers, so even if your added band decoder works OK, keep an eye on the KPA500 band selection long enough to be certain there are no strange behaviors introduced by the added decoder. 73, Don W3FPR On 5/12/2014 12:43 PM, Richard Thorne wrote: Thanks for all the replies, I plan on connecting a band decoder to the 2nd wye and it only receives/monitors the band data, it doesn't send anything back to the rig. So it looks like a 2nd wye should do the trick. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Parts in North Dakota
I hear this complaint often, from new residents of the north coast, but I have to laugh. Digi-Key in Thief River Falls, MN is not that far from Fargo. In fact, due to UPS and USPS routing changes in past few years --- ALL of those electronic parts shipments are routed through Fargo, ND !! Something to consider, next time you see those postings. w9gb Sent from iPad Air __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Parts in North Dakota
Gregory You are right Thief River Falls, MN is only 130 miles from me but minimum orders and shipping charges still apply and are high. Sometimes like my last project they will sell 10,000 for a cheap price but won't sell one at any price. As I said home brewing is expensive and frustrating. 73 Ken W0CZ w0cz at i29 dot net Sent from my iPad On May 12, 2014, at 12:19 PM, Gregory Beat gregory.b...@comcast.net wrote: I hear this complaint often, from new residents of the north coast, but I have to laugh. Digi-Key in Thief River Falls, MN is not that far from Fargo. In fact, due to UPS and USPS routing changes in past few years --- ALL of those electronic parts shipments are routed through Fargo, ND !! Something to consider, next time you see those postings. w9gb Sent from iPad Air __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@i29.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Dayton hotels/motels
Hi everyone! Our camping idea fell apart at the last minute and we now have 3 adults looking for some sort of hotel/motel accommodations for the Dayton Hamvention. Just wondering if anyone has any cancellations or something. Please contact me off list. Any other hotel suggestions are welcome as I'm totally unfamiliar with that area. Thanks! Slava Baytalskiy sla...@nullserv.com W2RMS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA500 ser. no.1066 factory built, Loose diode 1N5408
We have found a loose (de-soldered) diode 1N5408 in this factory assembled KPA500. The diode shows 10Mohm in one direction and 2-3 Mohm (varying) in the other direction (DVM) Where is this diode located (if there are several, then where?), what is its function and is it replaceable by a skilled tech person? What could be the reason for the failure - it does not appear to have been over-heated, so desoldering appears not logical. Is there a diagram of the KPA500 available? 73 from Steen and Paul OZ8SW (owner) and OZ4UN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
I have two big time dxers/contesters near me - on 160 , one is -8 to -9 dBm and the other is -10 to -11dBm . Folks , thats in the 50 to 100 mv area at the poor K3 .(S9+60 to 70 area) Just for fun of it , I can easily see both on my scope hung on my antenna. With the 250 hz 8 pole - I could copy an HS0 at my noise level split 2.2 khz away from the -9 dBm station and not even know he was there except seeing him on the P3. (He is using a K3 exciter and an ALPHA amp. ) Cannot say that for some of the other locals who have phase noise from various and sundry other rigs. 73 Hank K7HP (SNIP) If the operator never encounters signal levels in excess of S-9+30, there is no need for the roofing filter, but signals stronger than that are encountered commonly in contests and tuning through a DX pileup. If it were not for the Hardware AGC, they would overload the A-D converter causing the entire output to become garbage. With the Hardware AGC present, that is not going to happen, but strong signals within the 1st IF bandpass will cause pumping of the Hardware AGC as those signals come and go. In the K3, *that* condition is what the roofing filters will prevent. Bottom line, if you hear that pumping (and subsequent desensing of the receiver), you would benefit from a more narrow filter. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
Try any of the online hotel bookers, Expedia, Hotels.com, Priceline etc. There's plenty of rooms in Dayton in the $50 to $80 range. It's not like it was 30 years ago when they'd sell out in February. 73, Charlie k3ICH - Original Message - From: Slava Baytalskiy sla...@nullserv.com To: elecraft@mailman.qth.net Sent: Monday, May 12, 2014 1:57 PM Subject: [Elecraft] Dayton hotels/motels Hi everyone! Our camping idea fell apart at the last minute and we now have 3 adults looking for some sort of hotel/motel accommodations for the Dayton Hamvention. Just wondering if anyone has any cancellations or something. Please contact me off list. Any other hotel suggestions are welcome as I'm totally unfamiliar with that area. Thanks! Slava Baytalskiy sla...@nullserv.com W2RMS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
Ok. Found a room. 3 blocks from the Crowne Plaza Hotel, where I'll be attending the Contest University thing. Worked out ok. Slava Baytalskiy sla...@nullserv.com W2RMS On May 12, 2014, at 2:13 PM, Charlie T, K3ICH pin...@erols.com wrote: Try any of the online hotel bookers, Expedia, Hotels.com, Priceline etc. There's plenty of rooms in Dayton in the $50 to $80 range. It's not like it was 30 years ago when they'd sell out in February. 73, Charlie k3ICH - Original Message - From: Slava Baytalskiy sla...@nullserv.com To: elecraft@mailman.qth.net Sent: Monday, May 12, 2014 1:57 PM Subject: [Elecraft] Dayton hotels/motels Hi everyone! Our camping idea fell apart at the last minute and we now have 3 adults looking for some sort of hotel/motel accommodations for the Dayton Hamvention. Just wondering if anyone has any cancellations or something. Please contact me off list. Any other hotel suggestions are welcome as I'm totally unfamiliar with that area. Thanks! Slava Baytalskiy sla...@nullserv.com W2RMS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to sla...@nullserv.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
I must be doing something wrong, because my search didn't show there being plenty of rooms in the $50-$80 range: http://www.hotels.com/search/search.html?cd=05-15-14children[0]=0dd=05-18-14numberOfRooms=1pageName=HomePagepn=1rl=CITY%3A1482922%3APROVIDED%3APROVIDEDroomInfoList[0].numberOfAdults=2so=PRICEsrsr=HomePage|AutoS|city|dayton++oh|6|3|3|3|2|15|1482922vt=LIST 73, Scott, N9AA On 5/12/14 2:13 PM, Charlie T, K3ICH wrote: Try any of the online hotel bookers, Expedia, Hotels.com, Priceline etc. There's plenty of rooms in Dayton in the $50 to $80 range. It's not like it was 30 years ago when they'd sell out in February. 73, Charlie k3ICH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] FW: [cwops] merger of Alpha and Ten Tec
Hope it isn't bad etiquette to send this to two email lists I've thought that ExpertAmps and Elecraft should consider some type of working agreement. I have a K3 and 2K-FA that play very well together .very nice for QSK, though I did buy the amp with the after market vacuum relay), pretty similar to the way the K3 and KPA500 do. A long time ago Elecraft protopyed a single tube KPA-1500 but I think that project died. Frosty K5LBU ..the American Distributor for SPE puts together a lodge safari type operation in Africa every year (last year it was 3D2A, this year I think it will be 7P7 or 7Q7) and they pair K3's and 1K-FAs and 2K-FAs. 73 Steve KL7SB From: cw...@yahoogroups.com [mailto:cw...@yahoogroups.com] Sent: Monday, May 12, 2014 8:46 AM To: k...@baymoon.com Cc: cw...@yahoogroups.com Subject: RE: [cwops] merger of Alpha and Ten Tec Hm.if one had to, this merger would be hard to judge. IMO, since the demise of Al Kahn, Ten Tec has been sliding downhill. Since Al's departure, Ten Tec really has not produced anything new or innovative. I still have three Omni 6+ rigs and one of the Corsair II, both of which I think have excellent receivers. I owned a couple of their amplifiers and they were both good and reliable. I now own an Alpha 9500 which is proving to be a real workhorse amp. I am fortunate since switching from the Alpha 8510, which was troublesome, to the 9500 , to not really have to utilize their tech support again. Ten Tec's tech support was what I would call less than stellar but you eventually could get some help from them. My impression, especially now with Elecraft available, Ten Tec was slowly sliding down the hill. With Alpha showing very slow design capability, in terms of their automatic tuner, they are not very attractive either. Both companies probably could be excellent for the hobby IF they could acquire some management who were capable of looking forward. I just hope we don't lose either one of them! 73, Tom - W4BQF -Original Message- From: cw...@yahoogroups.com [mailto:cw...@yahoogroups.com] Sent: Monday, May 12, 2014 12:11 PM To: cw...@yahoogroups.com Subject: [cwops] merger of Alpha and Ten Tec I'm still on the fence about this one. I have owned both companies' products. I had a Ten-Tec OMNI D, two Centurions, and a Titan. I still own an Alpha 87A. In the early 1980s, when I bought the Ten-Tec OMNI D I thought it was a very good transceiver. With regard to my amplifiers, though, the Titan and one of the Centurions both developed power transformer shorts and it was expensive to fix them. I have had very good service, so far, from my Alpha 87A. But...I'm not so sure the 9500 is an improvement over the 87A, or so I've heard. The 87A uses pin diodes and is relatively quiet. The 9500 uses relays and is relatively noisy. Both use vacuum tubes. From my perspective (opinion, not necessarily fact), Elecraft is the most innovative ham company; and SPE has succeeded in designing the 2K-FA solid-state amplifier that has nearly a 5 out of 5 eham rating. In my perfect ham world, Elecraft would make a 1.5 KW solid-state KPA-500-like amplifier. My station would become a K3/P3 and 1.5 KW all Elecraft station (actually a pair in SO2R). I'm not sure Elecraft will make that 1.5 KW amplifier. So, it's a question about whether a pair of K-lines in SO2R would be sufficient for me. There is also the possibility that I would get a 2K-FA (W9KNI loves his). So, getting back to the merger, I'm sure it makes economic sense to merge...but I'm not so sure I would consider it a marriage of two companies who have been and continue to be state-of-the-art ham product makers. You may see it differently, of course, and that's what makes things interesting. 73, Rob K6RB PS: See you in Dayton ! ; __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 ser. no.1066 factory built, Loose diode 1N5408
Full schematics on website prob with manuals. Sent from my iPhone ...nr4c. bill On May 12, 2014, at 1:58 PM, Poul Erik Karlshøj (PKA) p...@telepost.gl wrote: We have found a loose (de-soldered) diode 1N5408 in this factory assembled KPA500. The diode shows 10Mohm in one direction and 2-3 Mohm (varying) in the other direction (DVM) Where is this diode located (if there are several, then where?), what is its function and is it replaceable by a skilled tech person? What could be the reason for the failure - it does not appear to have been over-heated, so desoldering appears not logical. Is there a diagram of the KPA500 available? 73 from Steen and Paul OZ8SW (owner) and OZ4UN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@widomaker.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
ORIGINAL MESSAGE: (may be snipped) On 5/12/2014 9:33 AM, Jerome Sodus wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K REPLY: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
Not necessarily. Several weeks ago a friend found a $100/night room at the Crowne Plaza via one of these online sites. Until he tried to book it, and it was not available. Good luck, Jim K8MR In a message dated 5/12/2014 2:28:35 P.M. Eastern Daylight Time, pin...@erols.com writes: Try any of the online hotel bookers, Expedia, Hotels.com, Priceline etc. There's plenty of rooms in Dayton in the $50 to $80 range. It's not like it was 30 years ago when they'd sell out in February. 73, Charlie k3ICH - Original Message - From: Slava Baytalskiy sla...@nullserv.com To: elecraft@mailman.qth.net Sent: Monday, May 12, 2014 1:57 PM Subject: [Elecraft] Dayton hotels/motels Hi everyone! Our camping idea fell apart at the last minute and we now have 3 adults looking for some sort of hotel/motel accommodations for the Dayton Hamvention. Just wondering if anyone has any cancellations or something. Please contact me off list. Any other hotel suggestions are welcome as I'm totally unfamiliar with that area. Thanks! Slava Baytalskiy sla...@nullserv.com W2RMS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
Steve, You are partly correct. Elecraft did prototype both an 800 watt amp and a 1500 watt amp long ago. They were both all solid state - no tubes involved. The 1500 watt version used two of the power bricks of the 800 watt unit. 73, Don W3FPR On 5/12/2014 2:25 PM, Stephen Bloom wrote: Hope it isn't bad etiquette to send this to two email lists I've thought that ExpertAmps and Elecraft should consider some type of working agreement. I have a K3 and 2K-FA that play very well together .very nice for QSK, though I did buy the amp with the after market vacuum relay), pretty similar to the way the K3 and KPA500 do. A long time ago Elecraft protopyed a single tube KPA-1500 but I think that project died. Frosty K5LBU ..the American Distributor for SPE puts together a lodge safari type operation in Africa every year (last year it was 3D2A, this year I think it will be 7P7 or 7Q7) and they pair K3's and 1K-FAs and 2K-FAs. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
At least I do, Arie. Maybe those with fewer local signals do not. Dunno. Phil w7ox On 5/12/14, 9:23 AM, Arie Kleingeld PA3A wrote: Well, You defenitely need those filters in the K3. When signals are strong and the band is busy, signals coming through the roofing filter (line S9+20dB) is said to pump the hardware AGC, even if you have the DSP filtering set to a small BW. Anyway, you can certainly hear that. Try it on CW, on 40m in the evening when there's a contest. You'll love the 400Hz roofing filter. 73 Arie PA3A Al Lorona schreef op 11-5-2014 23:03: What determines the bandwidth you hear at the loudspeaker? It's not your roofing filter, despite a continuing notion that it is. Dave Hachadorian's point in a post a few weeks ago was that you don't need a 1.8 kHz filter to get a 1.8 kHz bandwidth. You're free to set whatever bandwidth you want with any filter. Before rigs had DSP we got used to the idea that your crystal filter sets your bandwidth. That's not true any more. It sets your *maximum* bandwidth. You then have the freedom to narrow and position a bandwidth arbitrarily using the DSP controls [SHIFT and WIDTH or HI and LO]. Here's a true-false quiz: 1. I'm a contester, so I need a 1.8 kHz roofing filter in the K3. 2. I should purchase the 400 Hz filter if I like to operate CW with bandwidths of 300 - 400 Hz. 3. For SSB, the 2.7 and 2.8 kHz filters are 'too wide'. 4. I have the 2.7 kHz filter installed, so for best results I should set my WIDTH control for a passband of 2.7 kHz. 5. I can use my 2.7 kHz filter in CW mode with my LO=0.30 and HI=0.50 (that is, BW=0.20). __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
Wait until the SPE 1.3K-FA comes out, 16.5 lb's, built-in Antenna Tuner. If the price is right and it should be between the 1K and 2K, they should sell a boatload of them. 73, Dick, W1KSZ On 5/12/2014 11:25 AM, Stephen Bloom wrote: Hope it isn't bad etiquette to send this to two email lists I've thought that ExpertAmps and Elecraft should consider some type of working agreement. I have a K3 and 2K-FA that play very well together .very nice for QSK, though I did buy the amp with the after market vacuum relay), pretty similar to the way the K3 and KPA500 do. A long time ago Elecraft protopyed a single tube KPA-1500 but I think that project died. Frosty K5LBU ..the American Distributor for SPE puts together a lodge safari type operation in Africa every year (last year it was 3D2A, this year I think it will be 7P7 or 7Q7) and they pair K3's and 1K-FAs and 2K-FAs. 73 Steve KL7SB From: cw...@yahoogroups.com [mailto:cw...@yahoogroups.com] Sent: Monday, May 12, 2014 8:46 AM To: k...@baymoon.com Cc: cw...@yahoogroups.com Subject: RE: [cwops] merger of Alpha and Ten Tec Hm.if one had to, this merger would be hard to judge. IMO, since the demise of Al Kahn, Ten Tec has been sliding downhill. Since Al's departure, Ten Tec really has not produced anything new or innovative. I still have three Omni 6+ rigs and one of the Corsair II, both of which I think have excellent receivers. I owned a couple of their amplifiers and they were both good and reliable. I now own an Alpha 9500 which is proving to be a real workhorse amp. I am fortunate since switching from the Alpha 8510, which was troublesome, to the 9500 , to not really have to utilize their tech support again. Ten Tec's tech support was what I would call less than stellar but you eventually could get some help from them. My impression, especially now with Elecraft available, Ten Tec was slowly sliding down the hill. With Alpha showing very slow design capability, in terms of their automatic tuner, they are not very attractive either. Both companies probably could be excellent for the hobby IF they could acquire some management who were capable of looking forward. I just hope we don't lose either one of them! 73, Tom - W4BQF -Original Message- From: cw...@yahoogroups.com [mailto:cw...@yahoogroups.com] Sent: Monday, May 12, 2014 12:11 PM To: cw...@yahoogroups.com Subject: [cwops] merger of Alpha and Ten Tec I'm still on the fence about this one. I have owned both companies' products. I had a Ten-Tec OMNI D, two Centurions, and a Titan. I still own an Alpha 87A. In the early 1980s, when I bought the Ten-Tec OMNI D I thought it was a very good transceiver. With regard to my amplifiers, though, the Titan and one of the Centurions both developed power transformer shorts and it was expensive to fix them. I have had very good service, so far, from my Alpha 87A. But...I'm not so sure the 9500 is an improvement over the 87A, or so I've heard. The 87A uses pin diodes and is relatively quiet. The 9500 uses relays and is relatively noisy. Both use vacuum tubes. From my perspective (opinion, not necessarily fact), Elecraft is the most innovative ham company; and SPE has succeeded in designing the 2K-FA solid-state amplifier that has nearly a 5 out of 5 eham rating. In my perfect ham world, Elecraft would make a 1.5 KW solid-state KPA-500-like amplifier. My station would become a K3/P3 and 1.5 KW all Elecraft station (actually a pair in SO2R). I'm not sure Elecraft will make that 1.5 KW amplifier. So, it's a question about whether a pair of K-lines in SO2R would be sufficient for me. There is also the possibility that I would get a 2K-FA (W9KNI loves his). So, getting back to the merger, I'm sure it makes economic sense to merge...but I'm not so sure I would consider it a marriage of two companies who have been and continue to be state-of-the-art ham product makers. You may see it differently, of course, and that's what makes things interesting. 73, Rob K6RB PS: See you in Dayton ! ; __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w1...@earthlink.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
Steve, you sure have been doing a lot of Thinking You better be careful now! :-) 73 Milverton. On Monday, May 12, 2014 2:16 PM, Don Wilhelm w3...@embarqmail.com wrote: Steve, You are partly correct. Elecraft did prototype both an 800 watt amp and a 1500 watt amp long ago. They were both all solid state - no tubes involved. The 1500 watt version used two of the power bricks of the 800 watt unit. 73, Don W3FPR On 5/12/2014 2:25 PM, Stephen Bloom wrote: Hope it isn't bad etiquette to send this to two email lists I've thought that ExpertAmps and Elecraft should consider some type of working agreement. I have a K3 and 2K-FA that play very well together .very nice for QSK, though I did buy the amp with the after market vacuum relay), pretty similar to the way the K3 and KPA500 do. A long time ago Elecraft protopyed a single tube KPA-1500 but I think that project died. Frosty K5LBU ..the American Distributor for SPE puts together a lodge safari type operation in Africa every year (last year it was 3D2A, this year I think it will be 7P7 or 7Q7) and they pair K3's and 1K-FAs and 2K-FAs. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tnny...@yahoo.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
$6-$7K is a boatload of money, but I guess if you're a serious amateur, it's worth it. Personally, it's pretty hard for me to justify $7K on an amp. I might be able to swing $3.5K on a KPA1000, though... 73, Scott, N9AA On 5/12/14 3:17 PM, Richard Solomon wrote: Wait until the SPE 1.3K-FA comes out, 16.5 lb's, built-in Antenna Tuner. If the price is right and it should be between the 1K and 2K, they should sell a boatload of them. 73, Dick, W1KSZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
From an older Inrad writeup (and consistent with Wayne's): The term “roofing” stems from the fact that it protects the rest of the radio following it from out of the passband signals. http://www.qth.com/inrad/roofing-filters.pdf I like the term preselector from my 75S-1, but that doesn't fit well with selectable bandwidths. 73, Josh W6XU On 5/12/2014 12:01 PM, Bill Turner wrote: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Roofing Filters - An Empirical Test
I would be interested in knowing if anyone has done an empirical test and observed the difference directly. Specifically, since the sub receiver is identical to the main receiver in every way, if someone has a K3 with, for example, a 400 Hz filter in the main but only a wider set in the sub, and then set the DSP bandwidth on both receivers to 200 Hz or so, what differences they actually noticed. I have no doubt the theory and the engineering are sound - just curious what the difference sounds like in the field . . . Ted, KN1CBR On May 12, 2014, at 9:33 AM, Jerome Sodus jso...@comcast.net wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Turner Sent: Monday, May 12, 2014 1:07 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood ORIGINAL MESSAGE: (may be snipped) On 5/11/2014 7:25 PM, Fred Jensen wrote: I too think roofing filters are really not well understood. REPLY: A large part of the misunderstanding is due to the name. Whoever chose the name roofing did a great disservice. A better name would simply be it's function: 1st I.F. filter. That's what it is and that's what it does. I have always thought that roofing was a marketing ploy to imbue it with some kind of magical powers. 73, Bill W6WRT -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3: PSK31 will not allow Split operation.
K3 PSK31 will not allow Split operation. New kit K3 S/N 8156 basic setup, one 250 Hz filter option. No other options. In PSK-D mode, the K3 will not allow receiving on VFO A and transmitting on VFO B. The message SPL N/A comes up when holding the Split button. In FSK-D RTTY Split works fine. Other modes work fine for Split as well. Both VFO A and VFO B are on the same mode and band. Is there some reason that would cause Split not to work with PSK31? Thanks, Bob W1XT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Accessory Jack - How Many Wye Cables?
I have up to 5 devices fed in parallel with the same BCD sigs from my K3 (my KPA500, a 5B4AGN TXBPF, my 10x2 homebrew antenna switch, a homebrew sequencer that also splits PTT between HF VHF based on BCD and sometimes an additional homebrew banddecoder, too). So no problem at all to parallel things as long as the devices used are designed correctly, i.e. inputs isolated and thus no feedback to the other devices. 73, Olli - DH8BQA Contest, DX radio projects: http://www.dh8bqa.de Am 12.05.2014 13:53, schrieb Peter Chamalian W1RM: Yes so long as you aren't trying to send the same data to two devices. If you are trying to send band data to two devices, I'm not sure if that would work or not. Currently I have one which provides my amp with band data and the other side to my 6m preamp. I wanted to add RTTY from my MicroKeyer II and that comes via the ACC line so I'm awaiting the arrival of a second Wye for that. All three ports are independent data so no conflict. Pete, W1RM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Richard Thorne Sent: Monday, May 12, 2014 7:48 AM To: Elecraft Reflector Subject: [Elecraft] K3 - Accessory Jack - How Many Wye Cables? Currently I have a wye cable attached to the accessory jack on the back of my K3 which in turn is connected to a microham device and the KAT-500 tuner. I have a need to supply band data to another device, can I connect another wye to the current wye so I can connect 3 devices to the accessory jack? Thanks Rich - N5ZC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to dro...@necg.de __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Roofing Filters - An Empirical Test
The January 2009 QST has a table list the IMD numbers with various filters. Quite informative. There's is no easy way to cut/paste the data into an email, unfortunately. 73, Scott, N9AA On 5/12/14 3:54 PM, Dauer, Edward wrote: I would be interested in knowing if anyone has done an empirical test and observed the difference directly. Specifically, since the sub receiver is identical to the main receiver in every way, if someone has a K3 with, for example, a 400 Hz filter in the main but only a wider set in the sub, and then set the DSP bandwidth on both receivers to 200 Hz or so, what differences they actually noticed. I have no doubt the theory and the engineering are sound - just curious what the difference sounds like in the field . . . Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
I have imperfect recollections that the source of the term roofing filter came from the idea that the filter put a roof over your receiver to prevent very strong, off-frequency signals from getting in. You'll need to crank up your imagination here ... similar to the roof of your house keeping out things falling from the sky while desired things can still enter through the doors. I did say imagination. :-) I do also agree, it's probably not a particularly descriptive name, but the filters do have a purpose in SDR's like the K3. I think most of the thread was aimed at the differences between the various filters available for the K3. 73, Fred K6DGW - Northern California Contest Club - CU in the 2014 Cal QSO Party 4-5 Oct 2014 - www.cqp.org On 5/12/2014 12:01 PM, Bill Turner wrote: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Roofing Filters - An Empirical Test
It's quite simple. If you have a very strong interfering signal that falls inside the SSB filter passband (2.7 or 2.8 kHz), but outside an installed narrow filter, the hardware AGC will not get pumped. Lacking such a filter, a strong enough signal (typically S9+20 or higher) *will* activate hardware AGC, which can be annoying in mild cases and debilitating if it's really strong, has key clicks, etc. This is why the K3 has slots for narrow filters. On a very busy band with lots of strong signals, it's the difference between a usable radio or not. 73, Wayne N6KR On May 12, 2014, at 12:54 PM, Dauer, Edward eda...@law.du.edu wrote: I would be interested in knowing if anyone has done an empirical test and observed the difference directly. Specifically, since the sub receiver is identical to the main receiver in every way, if someone has a K3 with, for example, a 400 Hz filter in the main but only a wider set in the sub, and then set the DSP bandwidth on both receivers to 200 Hz or so, what differences they actually noticed. I have no doubt the theory and the engineering are sound - just curious what the difference sounds like in the field . . . Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Roofing Filters - An Empirical Test
I should have pointed out that this effect is most noticeable with CW or narrow data modes, where there's a large difference in bandwidth between wide and narrow filters. In SSB mode, a somewhat narrower filter (say 1.8 kHz) will provide additional margin on an active band with strong signals, but some of the advantage is lost due to IMD products inherent in the received voice signals. Wayne On May 12, 2014, at 1:19 PM, Wayne Burdick n...@elecraft.com wrote: It's quite simple. If you have a very strong interfering signal that falls inside the SSB filter passband (2.7 or 2.8 kHz), but outside an installed narrow filter, the hardware AGC will not get pumped. Lacking such a filter, a strong enough signal (typically S9+20 or higher) *will* activate hardware AGC, which can be annoying in mild cases and debilitating if it's really strong, has key clicks, etc. This is why the K3 has slots for narrow filters. On a very busy band with lots of strong signals, it's the difference between a usable radio or not. 73, Wayne N6KR On May 12, 2014, at 12:54 PM, Dauer, Edward eda...@law.du.edu wrote: I would be interested in knowing if anyone has done an empirical test and observed the difference directly. Specifically, since the sub receiver is identical to the main receiver in every way, if someone has a K3 with, for example, a 400 Hz filter in the main but only a wider set in the sub, and then set the DSP bandwidth on both receivers to 200 Hz or so, what differences they actually noticed. I have no doubt the theory and the engineering are sound - just curious what the difference sounds like in the field . . . Ted, KN1CBR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
If elecraft made a full legal power amp like the Kpa500. I would be all over it. Right now I use a Alpha 76PA. When I have to, only voice. Every thing else is around 10 to 25 watts. Gerald On May 12, 2014 2:27 PM, Scott Manthe scott.man...@gmail.com wrote: $6-$7K is a boatload of money, but I guess if you're a serious amateur, it's worth it. Personally, it's pretty hard for me to justify $7K on an amp. I might be able to swing $3.5K on a KPA1000, though... 73, Scott, N9AA On 5/12/14 3:17 PM, Richard Solomon wrote: Wait until the SPE 1.3K-FA comes out, 16.5 lb's, built-in Antenna Tuner. If the price is right and it should be between the 1K and 2K, they should sell a boatload of them. 73, Dick, W1KSZ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to kc6...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] For Sale: KX3 + extras and AlexLoop / Buddipole Antennas
The Alex Loop has been sold (and shipped). Just realized that I made a major typo in the ad. The KX3 and all extras are $1350 shipped to CONUS - KX3 Serial# 4981 - Purchased August 2013 (less than a year old). No scratches or dents. No functional issues. Includes - KXAT3 - Internal antenna tuner KXBC3 - Internal NiMH Charger with Real-time clock for KX3 KXFL3 - Dual-passband roofing filter KXSER-a - RS-232 Cable MH3 - Microphone KX3-PCKT - KX3 accessory cable set Powerpole enabled power cable All original spiral bound assembly, user manuals and documentation Additional KX3 Items - Included - * BNC-BP - BNC M-binding Posts * BNC-RA - BNC Right Angle M-F * Fred Cady - KE7X Book - The Elecraft KX3 (recent copy) * Side-KX End-plates (love handles) - http://gemsproducts.com/index.html * Side KX Cover - http://gemsproducts.com/index.html * 8 x rechargeable AA NiMH batteries Over $1600 invested in the list above. Asking - $1350 shipped to CONUS (or local pickup) Also have - * Buddipole Deluxe - long version with several additional items - Purchased during Pacificon 2013 last year - Several upgrades - (yagi kit, book, knarls, etc.) - Too large to ship. Originally bought for $750 - local pickup for $625. -- VaibhaV Sharma W7VAI On Sun, May 11, 2014 at 6:30 PM, VaibhaV Sharma vaib...@vaibhavsharma.comwrote: KX3 Serial# 4981 - Purchased August 2013 (less than a year old). No scratches or dents. No functional issues. Includes - KXAT3 - Internal antenna tuner KXBC3 - Internal NiMH Charger with Real-time clock for KX3 KXFL3 - Dual-passband roofing filter KXSER-a - RS-232 Cable MH3 - Microphone KX3-PCKT - KX3 accessory cable set Powerpole enabled power cable All original spiral bound assembly, user manuals and documentation Additional KX3 Items - Included - * BNC-BP - BNC M-binding Posts * BNC-RA - BNC Right Angle M-F * Fred Cady - KE7X Book - The Elecraft KX3 (recent copy) * Side-KX End-plates (love handles) - http://gemsproducts.com/index.html * Side KX Cover - http://gemsproducts.com/index.html * 8 x rechargeable AA NiMH batteries Over $1600 invested in the list above. Asking - $1450 shipped to CONUS (or local pickup) I also have these antennas that go very well with the KX3 - * Brand new (1 month old) Alex Loop WalkHam - Excellent loop Antenna with customized tripod that fits in the antenna bag - $350 shipped to CONUS * Buddipole Deluxe - long version with several additional items - Purchased during Pacificon 2013 last year - Several upgrades - (yagi kit, book, knarls, etc.) - Too large to ship. Originally bought for $750 - local pickup for $625. Selling to keep the XYL happy. Contact me off-list please. — VaibhaV Sharma W7VAI Milpitas, California __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Bill, Originally the superhet receivers converted from the signal frequency to a lower fixed intermediate frequency in order to obtain sufficient selectivity. IFs went as low as 85kHz until crystal filters became more widespread. As designs changed ( changed not improved) it became usual to convert to a higher frequency, in the order of 70MHz to obtain good image rejection because manufacturers economised on signal frequency filtering and they then down converted to a low IF as before. To protect the second mixer a roofing filter was added and so termed because it was at the high IF ie the roof in terms of frequency. There were good reasons for this in commercial equipment and the amateur equipment followed as a marketing ploy. Hope that helps and please excuse my poor writing. Regards Peter G3SMT I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to peter.to...@talktalk.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
SPE has succeeded in designing the 2K-FA solid-state amplifier that has nearly a 5 out of 5 eham rating W8JI found that 5 out of 5 on eham does not mean much. SPE 2k owners are like in a Corvette club: they bought it mostly because they have money and they want the most expensive stuff. Most seem to be ignorant and afraid of saying one slightest criticism. With small modifications, 2k-fa can be great, but SPE is no Elecraft. Ignacy, NO9E -- View this message in context: http://elecraft.365791.n2.nabble.com/FW-cwops-merger-of-Alpha-and-Ten-Tec-tp7588989p7589009.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Bill, Like a roof protects the contents of a building, a roofing filter protects the electronics that follow it from overload. 73, Don W3FPR On 5/12/2014 3:01 PM, Bill Turner wrote: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 ser. no.1066 factory built, Loose diode 1N5408
The diode is probably not defective (although the soldering is). Unless your DVM measures the forward voltage drop of the diode, resistance readings in the forward direction are probably unreliable. I would just resolder it and see if it works! On 5/12/2014 10:58 AM, Poul Erik Karlshøj (PKA) wrote: We have found a loose (de-soldered) diode 1N5408 in this factory assembled KPA500. The diode shows 10Mohm in one direction and 2-3 Mohm (varying) in the other direction (DVM) Where is this diode located (if there are several, then where?), what is its function and is it replaceable by a skilled tech person? What could be the reason for the failure - it does not appear to have been over-heated, so desoldering appears not logical. Is there a diagram of the KPA500 available? 73 from Steen and Paul OZ8SW (owner) and OZ4UN -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
There you go! Well said. 73 Jerry KM3K KX3#6088 Sent from my NOOK Don Wilhelm w3...@embarqmail.com wrote: Bill, Like a roof protects the contents of a building, a roofing filter protects the electronics that follow it from overload. 73, Don W3FPR On 5/12/2014 3:01 PM, Bill Turner wrote: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Roofing Filters - An Empirical Test
My K3 was originally set up this way, 400 Hz in the main and 2.8 kHz in the sub. When working DX pileups with the main on the DX and the sub on the pileup, I definitely noticed the 'pumping' effect on the sub only. It was sometimes annoying when the DX was working a weak caller and the usual loud idiots were continuing to call. On 5/12/2014 12:54 PM, Dauer, Edward wrote: I would be interested in knowing if anyone has done an empirical test and observed the difference directly. Specifically, since the sub receiver is identical to the main receiver in every way, if someone has a K3 with, for example, a 400 Hz filter in the main but only a wider set in the sub, and then set the DSP bandwidth on both receivers to 200 Hz or so, what differences they actually noticed. I have no doubt the theory and the engineering are sound - just curious what the difference sounds like in the field . . . Ted, KN1CBR -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 low Power
Elecrafters, a little while ago i had an issue with loss of rf-power. I thought i had found the problem. I hadn't. Symptom now: Power out only about 3 Watts. I removed the 100W-PA, changed the Menue to 'not inst'. With TUN PWR set to 12W i can achieve about 2.5W . Only 1 of the 3 Transistors on the low-Power PA gets warm during (short) transmissions with the bottom cover removed. There are 2 RD15HVF1 and 1 RD06HHF1. How can i check if a transistor is defective? Any help welcome. I think the 100W PA is ok. Well , i hope . -- Ohne CW ist es nur CB.. 73, Martin DM4iM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Roof-upper ... higher ... overhead ... protective ... There are several fairly intuitive possibilities, none of which are worth getting confused about in the first place. Dave AB7E On 5/12/2014 12:01 PM, Bill Turner wrote: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
ORIGINAL MESSAGE: (may be snipped) On 5/12/2014 12:38 PM, Josh Fiden wrote: The term “roofing” stems from the fact that it protects the rest of the radio following it from out of the passband signals. REPLY: A roof keeps what falls on it (rain, snow) out. It doesn't pass it through. Just the opposite of what a so-called roofing filter does. I prefer names that are pretty much self-explanatory. This one isn't. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Wasn't the chicken little sky is falling thing popular back when roofing filter originated? We may be luckier than we know that it became known as a roofing filter. 73 de Dennis KD7CAC Scottsdale, AZ On May 12, 2014, at 3:04 PM, David Gilbert xda...@cis-broadband.com wrote: Roof-upper ... higher ... overhead ... protective ... There are several fairly intuitive possibilities, none of which are worth getting confused about in the first place. Dave AB7E On 5/12/2014 12:01 PM, Bill Turner wrote: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Think of your roof blocking the rain so the ceiling doesn't have to work so hard. It's not used for band-pass, it's to let the DSP work less. Sent from my iPhone ...nr4c. bill On May 12, 2014, at 3:01 PM, Bill Turner dez...@outlook.com wrote: ORIGINAL MESSAGE: (may be snipped) On 5/12/2014 9:33 AM, Jerome Sodus wrote: Hello Bill, The term roofing-filter made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K REPLY: I still don't get it. What does the word roof have to do with bandpass? That's where the confusion comes from. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@widomaker.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
Disclaimer: The first and last Corvette I owned was a 1956. (Don't I wish I had that back?) That said, what's your issue with Corvette owners? The new Sting Ray will blow the doors off exotics costing many times what it costs and get better fuel mileage than some economy cars while doing it, and costing little more than some boring mid-sized sedans or SUVs. http://www.chevrolet.com/corvette-stingray.html From edmunds.com: You can also see the average miles per gallon figure, which was achieved on 91-octane fuel, and with judicious use of cruise control and seventh gear. I did drive all day Sunday from Kansas City to Detroit (about 750 miles) in Economy mode, which seamlessly deactivates four of the engine's eight cylinders when their performance is not needed. That day I averaged over 29 mpg. Like I said, amazing. I wish I had used that technology throughout the trip. One could easily argue that the Corvette is the K3 of the automobile world. Wes N7WS On 5/12/2014 2:21 PM, Ignacy wrote: SPE has succeeded in designing the 2K-FA solid-state amplifier that has nearly a 5 out of 5 eham rating W8JI found that 5 out of 5 on eham does not mean much. SPE 2k owners are like in a Corvette club: they bought it mostly because they have money and they want the most expensive stuff. Most seem to be ignorant and afraid of saying one slightest criticism. With small modifications, 2k-fa can be great, but SPE is no Elecraft. Ignacy, NO9E __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
Actually, a roofing filter does exactly what it says. It protects against ... i.e., does not allow to pass ... out-of-passband signals from affecting the ADC or hardware AGC. It's a roof against unwanted energy and a window for desired signals. So would you prefer to call it a window? Have at it, but that doesn't alter the fact that its fundamental purpose is to protect ... protect the ADC and protect the AGC so that they can perform their function properly. And it doesn't mean that anybody will recognize what you're talking about, which is probably more relevant than the semantics involved. Dave AB7E On 5/12/2014 3:38 PM, Bill Turner wrote: ORIGINAL MESSAGE: (may be snipped) On 5/12/2014 12:38 PM, Josh Fiden wrote: The term “roofing” stems from the fact that it protects the rest of the radio following it from out of the passband signals. REPLY: A roof keeps what falls on it (rain, snow) out. It doesn't pass it through. Just the opposite of what a so-called roofing filter does. I prefer names that are pretty much self-explanatory. This one isn't. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 low Power
Martin, I have to ask since you did not mention it -- did you install the PA jumper block after removing the KPA3? If not, you need to do that. As for operating the transistors in the Low Power PA getting warm - one should *never* operate the K3 in transmit with that bottom cover removed. The cover serves as a heat sink. Hopefully you have not already destroyed those transistors. 73, Don W3FPR On 5/12/2014 5:53 PM, Martin wrote: Elecrafters, a little while ago i had an issue with loss of rf-power. I thought i had found the problem. I hadn't. Symptom now: Power out only about 3 Watts. I removed the 100W-PA, changed the Menue to 'not inst'. With TUN PWR set to 12W i can achieve about 2.5W . Only 1 of the 3 Transistors on the low-Power PA gets warm during (short) transmissions with the bottom cover removed. There are 2 RD15HVF1 and 1 RD06HHF1. How can i check if a transistor is defective? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
It depends on how far out you are willing to stay. Go to Centerville, Kettering, Beavercreek, or Troy, and you can find rooms with no reservation. You may have a 15-20 minute drive to the Arena, but that does not seem too far to me, most guys commute longer than that to work in many cases. I never make a reservation, just go. It is another story if you want to stay within a block of Hara Arena. Just MY take. K8JHR - On 5/12/2014 2:23 PM, Scott Manthe wrote: I must be doing something wrong, because my search didn't show there being plenty of rooms in the $50-$80 range: --- / __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Roofing filters
David Gilbert xda...@cis-broadband.com wrote: Actually, a roofing filter does exactly what it says. It protects against ... i.e., does not allow to pass ... out-of-passband signals from affecting the ADC or hardware AGC. It's a roof against unwanted energy and a window for desired signals. So would you prefer to call it a window? Have at it, but that doesn't alter the fact that its fundamental purpose is to protect ... protect the ADC and protect the AGC so that they can perform their function properly. And it doesn't mean that anybody will recognize what you're talking about, which is probably more relevant than the semantics involved. In receive I.F. applications, a crystal filter is used as a very narrow (very high-Q) band-pass filter. It cuts off unwanted signals above and below the desired passband. In a modern superhet like the K3, the crystal filter augments the DSP in a subsequent I.F., providing improved ultimate rejection and steeper skirts. In some implementations you can slide the I.F. associated with the crystal filter to the left or right of the nominal receive passband, so that the filter acts, in effect, like a low-pass or high-pass filter, working against the center frequency of later IFs. This can be useful in protecting the downstream I.F. on one side, but not the other. Narrow filtering takes care of both ends. Radios that don't use hardware roofing filters of some kind typically have worse blocking dynamic range (BDR) than those that do. For example, the K3 has typical BDR of over 140 dB, 15 to 20 dB better than radios with no hardware filtering (i.e., pure SDRs). This is why a K3 outfitted with narrow filters works well for contesting, Field Day, and DXpeditions; it won't get desensed by either the wide- or narrow-spaced onslaught often experienced in these situations. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 low Power
Don, no i didn't install the jumper block. I'm not even sure if i still have it. I transmitted only for very short periods touching all 3 transistors. I felt only one of them getting warm. So i need to find the jumper block first before i proceed the testing. Thank you for the reply. Am 13.05.2014 01:28, schrieb Don Wilhelm: Martin, I have to ask since you did not mention it -- did you install the PA jumper block after removing the KPA3? If not, you need to do that. As for operating the transistors in the Low Power PA getting warm - one should *never* operate the K3 in transmit with that bottom cover removed. The cover serves as a heat sink. Hopefully you have not already destroyed those transistors. 73, Don W3FPR On 5/12/2014 5:53 PM, Martin wrote: Elecrafters, a little while ago i had an issue with loss of rf-power. I thought i had found the problem. I hadn't. Symptom now: Power out only about 3 Watts. I removed the 100W-PA, changed the Menue to 'not inst'. With TUN PWR set to 12W i can achieve about 2.5W . Only 1 of the 3 Transistors on the low-Power PA gets warm during (short) transmissions with the bottom cover removed. There are 2 RD15HVF1 and 1 RD06HHF1. How can i check if a transistor is defective? -- Ohne CW ist es nur CB.. 73, Martin DM4iM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing
OK, apologies in advance for killing this thread, but I can't resist! There are several fairly intuitive possibilities, none of which are worth getting confused about in the first place. A fellow and his dog walk into a bar. The fellow asks the bartender If my talking dog answers a question correctly, will you give me a beer? Bartender: Talking dog, eh? Sure. Fellow: What is the exterior upper covering of a building? Dog: Roof! Beer delivered... Fellow: What is the texture of sandpaper? Dog: Ruff! another beer... Fellow: What is the first IF filter in a K3? Dog: Roof! another beer... Fellow: Who was the greatest home run hitter in baseball? Dog: Roof! The bartender tires of the game and quite forcefully throws the fellow and his dog out on the sidewalk. As the fellow gets up and brushes himself off, the dog says DiMaggio? Maris? Aaron? Sorry, es vy 73, George T Daughters, K6GT CU in the California QSO Party (CQP) October 4-5, 2014 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
On 5/12/2014 4:39 PM, K8JHR wrote: You may have a 15-20 minute drive to the Arena, but that does not seem too far to me, most guys commute longer than that to work in many cases. I never make a reservation, just go. It is another story if you want to stay within a block of Hara Arena. What about parking? -- -- 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
Phil, My choice for parking at Dayton is to park at Salem Mall (free) and take the bus to Hara arena - bus tickets for the entire event are $8 per person and can be purchased at the parking lot. There is parking near Hara arena for those who would not mind paying a higher price. I recall the rates are around $10 per day. 73, Don W3FPR On 5/12/2014 8:09 PM, Phil Kane wrote: On 5/12/2014 4:39 PM, K8JHR wrote: What about parking? -- -- 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
Wow... $10/day is high? Come to Toronto. You can easily pay that per hour in the core of the city. Mike va3mw On Mon, May 12, 2014 at 8:19 PM, Don Wilhelm w3...@embarqmail.com wrote: Phil, My choice for parking at Dayton is to park at Salem Mall (free) and take the bus to Hara arena - bus tickets for the entire event are $8 per person and can be purchased at the parking lot. There is parking near Hara arena for those who would not mind paying a higher price. I recall the rates are around $10 per day. 73, Don W3FPR On 5/12/2014 8:09 PM, Phil Kane wrote: On 5/12/2014 4:39 PM, K8JHR wrote: What about parking? -- -- 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to va...@portcredit.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] OT: Dayton parking
A common ploy is to rent a flea market space and park in it. Even gets you in the gate early. Discovered this when invited to ride from motel to arena with Bernard Getz (SP) and his bodyguard. (;-) 73 Ken Kopp - K0PP On May 12, 2014 6:19 PM, Don Wilhelm w3...@embarqmail.com wrote: Phil, My choice for parking at Dayton is to park at Salem Mall (free) and take the bus to Hara arena - bus tickets for the entire event are $8 per person and can be purchased at the parking lot. There is parking near Hara arena for those who would not mind paying a higher price. I recall the rates are around $10 per day. 73, Don W3FPR On 5/12/2014 8:09 PM, Phil Kane wrote: On 5/12/2014 4:39 PM, K8JHR wrote: What about parking? -- -- 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to kengk...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] [K2] K2 Always full power out
My K2/100 has been working fine for a few years. Last weekend, I was greeted by a HI CUR alarm when I first keyed down. After some troubleshooting, here's what I've found: If I remove the KPA100, the power control changes output power as expected, and the power bar graph works to full scale. With the KPA100 installed, and the power control below 10 W, the power is 17 Watts regardless of the setting (0 to 10 W). If the power control is set anywhere above 10 W, my meter is pegged at over 100 W out. I get no indication on the bar graph at any setting. I measured the V RFDET line at the DB9 on the KPA100 pin 7: in low power mode (stuck at 17 W), the voltage is .310. In high power mode (pegged over 100 W), the voltage is .410 V. At first I suspected the DAC U8, but it works without the KPA100. I'm guessing an input to the MCU is bad, causing it to drive the DAC U8 to full output. A few questions: For the base K2, it appears that the forward power calibration is fixed in firmware (my settings don't match my calibrated power meter). Where does the actual power control occur? I found V PWR coming out of DAC U8 pin 2, but can't find it anywhere else on the schematic. What are the inputs the MCU uses to drive the DAC? All tests were done on 40 meters into a high quality 50 Ohm load. Other bands have the same symptoms but I didn't bother to correct for the coupling value for my CP1 coupler. Since I can't vary power, I'm not sure what to expect for the Vforward and Vreflected voltages in the KPA100 coupler circuit. Thanks Dave AA3EE K2 s/n 5929 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K2] K2 Always full power out
Dave, The KPA100 diodes D16 and D17 in the wattmeter have likely been damaged. Those diodes are right on the output of the KPA100 and are intended to measure power output - which is not happening with your KPA100 (because they are damaged). There are other components in the KPA100 that can cause the same symptoms -- U5, U6, and Q10, Q11, but the most common failure is the diodes. Static from the antenna is the most common cause for failure of those diodes. You should assure that there is a DC path across all your antenna feedlines to bleed off static. A 5k to 50k resistor will do that job as will a 100 uHy choke. The best place to install that static bleed is in your antenna switch. In addition, when not in use, switch the K2/100 to a dummy load. Antenna static can be caused by wind, rain or nearby lightning surges. As for power control of the K2, the K2 system is more like commercial transceivers than most other amateur transceivers -- it is a closed control loop system. The Power knob is not a direct power drive control, but is input of the requested power to the MCU. The actual power output is monitored by the wattmeter at the output and sent back to the base K2 MCU where the two are compared. The BFO drive to the Transmit Mixer is adjusted to try to make those two equal. If the KPA100 wattmeter is damaged, it will not indicate any power output and the K2 will ramp up the drive to maximum in an attempt to produce more power output. Fix the reading of the actual power output and things will be restored to normal. One note of caution -- do not operate the K2 in that condition for very long intervals. The fact that the K2 is producing maximum drive can stress the PA transistors in the base K2, and if that condition is present for very long, those PA transistors will give up the ghost and will have to be replaced. The fact that you still get maximum power output indicates that the base PA transistors are still OK, but do not push that situation too long or you will have to replace those PA transistors in addition to the KPA100 wattmeter diodes. 73, Don W3FPR On 5/12/2014 9:01 PM, Dave Mueller wrote: My K2/100 has been working fine for a few years. Last weekend, I was greeted by a HI CUR alarm when I first keyed down. After some troubleshooting, here's what I've found: If I remove the KPA100, the power control changes output power as expected, and the power bar graph works to full scale. With the KPA100 installed, and the power control below 10 W, the power is 17 Watts regardless of the setting (0 to 10 W). If the power control is set anywhere above 10 W, my meter is pegged at over 100 W out. I get no indication on the bar graph at any setting. I measured the V RFDET line at the DB9 on the KPA100 pin 7: in low power mode (stuck at 17 W), the voltage is .310. In high power mode (pegged over 100 W), the voltage is .410 V. At first I suspected the DAC U8, but it works without the KPA100. I'm guessing an input to the MCU is bad, causing it to drive the DAC U8 to full output. A few questions: For the base K2, it appears that the forward power calibration is fixed in firmware (my settings don't match my calibrated power meter). Where does the actual power control occur? I found V PWR coming out of DAC U8 pin 2, but can't find it anywhere else on the schematic. What are the inputs the MCU uses to drive the DAC? All tests were done on 40 meters into a high quality 50 Ohm load. Other bands have the same symptoms but I didn't bother to correct for the coupling value for my CP1 coupler. Since I can't vary power, I'm not sure what to expect for the Vforward and Vreflected voltages in the KPA100 coupler circuit. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] FW: [cwops] merger of Alpha and Ten Tec
No problems with the Corvette. The Stingray has impressive reviews. Many Corvette owners seem to drive 5 miles below the limit and accelerate from 0 to 60 in 30 seconds. It seems to be a status symbol. Also if it breaks down often (reliability much worse than average in CR), it is still a great car to its owners. One can have an intelligent QSO with Alpha or Ameritron owners. Hard to do with SPE 2k owners. Ignacy, NO9E -- View this message in context: http://elecraft.365791.n2.nabble.com/FW-cwops-merger-of-Alpha-and-Ten-Tec-tp7588989p7589032.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K2] K2 Always full power out
Thanks, Don. I've never had a problem with static before, but always felt I was pushing my luck. I also use the KAT100 external tuner, and leave both antennas connected all the time. Does the Vf and Vr inside the KAT100 get sent back to the K2, and what do you think the chances are of the 1n5711's being bad in that too? All of my testing has been without the tuner, but it was inline when I first noticed the problem. Dave On 5/12/2014 9:25 PM, Don Wilhelm wrote: Dave, The KPA100 diodes D16 and D17 in the wattmeter have likely been damaged. Those diodes are right on the output of the KPA100 and are intended to measure power output - which is not happening with your KPA100 (because they are damaged). There are other components in the KPA100 that can cause the same symptoms -- U5, U6, and Q10, Q11, but the most common failure is the diodes. Static from the antenna is the most common cause for failure of those diodes. You should assure that there is a DC path across all your antenna feedlines to bleed off static. A 5k to 50k resistor will do that job as will a 100 uHy choke. The best place to install that static bleed is in your antenna switch. In addition, when not in use, switch the K2/100 to a dummy load. Antenna static can be caused by wind, rain or nearby lightning surges. As for power control of the K2, the K2 system is more like commercial transceivers than most other amateur transceivers -- it is a closed control loop system. The Power knob is not a direct power drive control, but is input of the requested power to the MCU. The actual power output is monitored by the wattmeter at the output and sent back to the base K2 MCU where the two are compared. The BFO drive to the Transmit Mixer is adjusted to try to make those two equal. If the KPA100 wattmeter is damaged, it will not indicate any power output and the K2 will ramp up the drive to maximum in an attempt to produce more power output. Fix the reading of the actual power output and things will be restored to normal. One note of caution -- do not operate the K2 in that condition for very long intervals. The fact that the K2 is producing maximum drive can stress the PA transistors in the base K2, and if that condition is present for very long, those PA transistors will give up the ghost and will have to be replaced. The fact that you still get maximum power output indicates that the base PA transistors are still OK, but do not push that situation too long or you will have to replace those PA transistors in addition to the KPA100 wattmeter diodes. 73, Don W3FPR On 5/12/2014 9:01 PM, Dave Mueller wrote: My K2/100 has been working fine for a few years. Last weekend, I was greeted by a HI CUR alarm when I first keyed down. After some troubleshooting, here's what I've found: If I remove the KPA100, the power control changes output power as expected, and the power bar graph works to full scale. With the KPA100 installed, and the power control below 10 W, the power is 17 Watts regardless of the setting (0 to 10 W). If the power control is set anywhere above 10 W, my meter is pegged at over 100 W out. I get no indication on the bar graph at any setting. I measured the V RFDET line at the DB9 on the KPA100 pin 7: in low power mode (stuck at 17 W), the voltage is .310. In high power mode (pegged over 100 W), the voltage is .410 V. At first I suspected the DAC U8, but it works without the KPA100. I'm guessing an input to the MCU is bad, causing it to drive the DAC U8 to full output. A few questions: For the base K2, it appears that the forward power calibration is fixed in firmware (my settings don't match my calibrated power meter). Where does the actual power control occur? I found V PWR coming out of DAC U8 pin 2, but can't find it anywhere else on the schematic. What are the inputs the MCU uses to drive the DAC? All tests were done on 40 meters into a high quality 50 Ohm load. Other bands have the same symptoms but I didn't bother to correct for the coupling value for my CP1 coupler. Since I can't vary power, I'm not sure what to expect for the Vforward and Vreflected voltages in the KPA100 coupler circuit. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 low Power
Martin, I had the same problem on this end, and I can guarantee your problem is on the LPF board (bad MOS FET). If you key up with no power out, and any of the three on the LPR board are cool, they are bad. One is the driver, and the two are the finals to drive the 100W amp. Hopefully, the two cool ones are the RD15SHVF1. It is best you replace the two finals at the same time. They are easy to replace, and it can be done without removing the LPF board (but I found it easier to do it with the board out). Dick K8ZTT -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Martin Sent: Monday, May 12, 2014 3:53 PM To: elecraft Subject: [Elecraft] K3 low Power Elecrafters, a little while ago i had an issue with loss of rf-power. I thought i had found the problem. I hadn't. Symptom now: Power out only about 3 Watts. I removed the 100W-PA, changed the Menue to 'not inst'. With TUN PWR set to 12W i can achieve about 2.5W . Only 1 of the 3 Transistors on the low-Power PA gets warm during (short) transmissions with the bottom cover removed. There are 2 RD15HVF1 and 1 RD06HHF1. How can i check if a transistor is defective? Any help welcome. I think the 100W PA is ok. Well , i hope . -- Ohne CW ist es nur CB.. 73, Martin DM4iM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k8...@centurylink.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K2] K2 Always full power out
Dave, The KAT100 power output is not sent back to the K2 unless the KAT100 is operated without the KPA100 in-line. With the KPA100 present, the KAT100 Vf and Vr values are only used to compute the SWR due to the result of the tuning algorithm. If the KPA100 is taken out of the equation (by physically removing the KPA100), then yes, the KAT100 wattmeter power output reading will be sent to the K2 MCU. 73, Don W3FPR On 5/12/2014 10:02 PM, Dave Mueller wrote: Thanks, Don. I've never had a problem with static before, but always felt I was pushing my luck. I also use the KAT100 external tuner, and leave both antennas connected all the time. Does the Vf and Vr inside the KAT100 get sent back to the K2, and what do you think the chances are of the 1n5711's being bad in that too? All of my testing has been without the tuner, but it was inline when I first noticed the problem. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Roofing filters are misunderstood
ORIGINAL MESSAGE: (may be snipped) On 5/12/2014 4:15 PM, David Gilbert wrote: So would you prefer to call it a window? REPLY: I like that! Much more accurate. A roof keeps everything out while a window lets only certain things such as the desired signal in. Much more self-explanatory. 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Power problem
My K3 has developed a power problem. I first noticed it on 20 meters. It would not reach 100 watts, but was stuck around 60 watts even using a dummy load, and the power would pump up and down about ten watts. I then went through the power calibration procedure and it failed at 5 watts with the error message Calibration failed because the transmit power did not reach the expected level. Time for a trip back to the factory? Suggestions? 73, Bill W6WRT dez...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Dayton hotels/motels
On 5/12/2014 10:57 AM, Slava Baytalskiy wrote: Any other hotel suggestions are welcome as I'm totally unfamiliar with that area. Glad you found your rooms. Some of my Chicago buddies stay in Miamisburg, about 10 miies S of Dayton, where I worked for Drake in the 60's. K3LR, who runs Contest University (CTU), told me that he buys the entire Crowne Plaza for his attendees. That's not quite true -- the Hamvention people buy some rooms, and I have one of them. The Crowne Plaza is significant, because that's where the various dinners (with really lousy food) are held, and more important, where CTU and the many DX and Contesting Club suites are located. Those suites run well into the early hours, and are one of the major reasons I go to Dayton. BTW -- I still have a 2-bed room in the Crowne Plaza available to share. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KX-3 4092
Hi Folks Owned a KX3 for a while but never used portable until recently. Antenna is a 40m dipole, coax fed. Nothing exotic. For some reason the KX3 tuner has a problem getting a good match. It settles on something like 1.8/1 which is not big deal except other transcievers show near perfect match around 7.1megs. Latest firmware ver loaded. Now here is the odd part; above 7260 fast perfect match. Move down 1khz to 7259 and the tuner won't match correctly. On a 50 ohm dummy load tuner is faultless. Some thing I noted is the VSWR reading on the KX3 seems out of line with other equipment. Not sure what the story is ? in the meantime the KX3 is back on the shelf, my K2 built several years ago is doing splendid service cheers Paul b zl1ajy -- View this message in context: http://elecraft.365791.n2.nabble.com/KX-3-4092-tp7589040.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] For Sale: KX3 + extras and AlexLoop / Buddipole Antennas
The KX3 and Alex Loop have been sold. On May 12, 2014, at 1:52 PM, VaibhaV Sharma vaib...@vaibhavsharma.com wrote: The Alex Loop has been sold (and shipped). Just realized that I made a major typo in the ad. The KX3 and all extras are $1350 shipped to CONUS - KX3 Serial# 4981 - Purchased August 2013 (less than a year old). No scratches or dents. No functional issues. Includes - KXAT3 - Internal antenna tuner KXBC3 - Internal NiMH Charger with Real-time clock for KX3 KXFL3 - Dual-passband roofing filter KXSER-a - RS-232 Cable MH3 - Microphone KX3-PCKT - KX3 accessory cable set Powerpole enabled power cable All original spiral bound assembly, user manuals and documentation Additional KX3 Items - Included - * BNC-BP - BNC M-binding Posts * BNC-RA - BNC Right Angle M-F * Fred Cady - KE7X Book - The Elecraft KX3 (recent copy) * Side-KX End-plates (love handles) - http://gemsproducts.com/index.html * Side KX Cover - http://gemsproducts.com/index.html * 8 x rechargeable AA NiMH batteries Over $1600 invested in the list above. Asking - $1350 shipped to CONUS (or local pickup) Also have - * Buddipole Deluxe - long version with several additional items - Purchased during Pacificon 2013 last year - Several upgrades - (yagi kit, book, knarls, etc.) - Too large to ship. Originally bought for $750 - local pickup for $625. -- VaibhaV Sharma W7VAI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
