Re: [Elecraft] K2: IDing Rev B Boards
MessageThanks Gary. I now have the Rev A boards locked away, and the Rev B boards sitting on the workbench. Thanks again! 73/72 Jeff - VA3JFF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Hum coupling?
Hi The K2 is susceptible to hum pick up. You must keep all sources of AC magnetic fields at least 3 feet away from the K2 or the VFO will be modulated by the hum. This has been noted many times here on the reflector. Even a high intensity lamp too close to the K2 was a problem. Do not stack the K2 on top of a power supply or amplifier or anything with a large power transformer Don Brown KD5NDB - Original Message - From: Tom Althoffmailto:[EMAIL PROTECTED] To: Elecraft@mailman.qth.netmailto:Elecraft@mailman.qth.net Sent: Thursday, October 28, 2004 4:13 PM Subject: [Elecraft] Hum coupling? Ten-Tec recommended putting the matching speaker/power supply of my old Omni-V on the RIGHT hand side of the radio. The audio lines ran on the left side and the transformer in the supply caused hum on receive. I'm experiencing similar AC hum on the K2 audio. The K2 sits on top of my Titan II and when the HV is set to operate (kicking in the big HV xfmr directly under the K2) I get the hum. If I pick the K2 up and move it about 3 away from the Titan then all is well. Has anyone else experienced hum from nearby power transformers? I plan on using a 10Amp analog supply (not here yet) and anticipate I might have to keep it away from the K2. I suspect switching supplies do not cause the same effect. Tom K2TA Greenwood Lake, NY K2 #1117 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.netmailto:Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htmhttp://mailman.qth.net/subscribershtm Elecraft web page: http://www.elecraft.comhttp://www.elecraft.com/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2: IDing Rev B Boards
Hi Everybody. Now that the KX1 is up and running, I can move onto my second hand, but unbuilt K2! Included with the unbuilt K2 was the complete Rev A to Rev B upgrade ... and I see the RevB markings on the Control and FP boards ... but not on the RF board. Is it marked somewhere that I am just missing ... or is there another way to tell the two RF boards apart? Thanks. 73/72 Jeff - VA3JFF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] WA3WSJ on Road This Morning at Covered Bridge
Hello all, Look for around 1500 utc at a covered bridge in Lancaster County, PA today on 20m and 40m somewhere in the qrm of the contest around 14.280 and 7.280mhz. Grab a Spooktificate from the ARCBS by working someone at a covered bridge. Take a look at the Spooktificate at the link below. http://www.arcbs.org/files/ARCBSPics/Spooktificate.html 72/73, Ed, WA3WSJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] BG; status for ALC and RF
If I understand the programmers reference manual the BG command should return the BG status depending on what mode you are in. In receive it returns S meter and during transmit it should return ALC or RF output depending on the mode you are in. I can see to get it to work. It always seems to return what was the S meter before and never RF or ALC? Anyone ran across this? Rich kd0zv ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] N0SS/K6XX SMD CW tuning indicator
Just a quick report. Tom did a great job putting together these new kits and they work great. The small size of the SMT board allows it to easily fit between the K2 control and front panel boards. I used a bit of sticky back Velcro to mount mine. I think he's just about out of kits, but still has boards available if you want to order parts yourself and put one together. This is a great beginner project for learning how to deal with surface mount devices. Tom chose to use one of the larger device sizes available (1206), which makes it relatively easy (0402's are tricky). If this is your first time trying SMT, and you're going to try this, I recommend that you order some extra components (they're pretty cheap). Although Tom recommends soldering the XR2211 IC first, I'd recommend you do it last - after you've had some experience with soldering SMT. It's much easier to recover from an error on a 2 terminal device than on a 14 terminal one. More info from Tom at http://www.n0ss.net/ or mailto://[EMAIL PROTECTED] ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Wierd SSB problem on my K2 on 20M
Correction: 17M is also behaving the same way. - Original Message - From: Tom Althoff To: Elecraft@mailman.qth.net Sent: Saturday, October 30, 2004 5:37 PM Subject: Wierd SSB problem on my K2 on 20M I know the BFO filter settings are saved with each mode and filter width...is there anything band specific that would cause the following symptoms... While listening to SSB signals: 160/80/40 LSB SSB OK 20M USB Rig seems to be stuck in LSB though the dial says u. Signals are unintelligable and appear to be wrong sideband or badly adjusted BFO setting 17/15/12/10 USB SSB OK I just checked it out on 20M SSB for the first time a few hours ago so it looks like #1117 is not quite ready to play full-time yet. Tom K2TA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] 20 meter problem on new K2
I just noticed that my K2 build 43xx is almost totally dead on 20 meters. I think all the other bands are OK. I hooked up my N-Gen and could not hear anything on 20. I thought I could use a scope to follow the generators noise signal but the scope makes about as much noise as the generator when going through the bandpass circuit. I am guessing it is probably bandpass or low pass and I need to start checking to make sure the relays are making contact, etc.?? It worked when I built it a couple months ago and am not sure when it quit as I dont use 20 often. This K2 is totally optioned and I have removed the 100 watt PA to make sure it is not the culprit. Any comments on the best way to trouble shoot this? Thanks and 73, Rich kd0zv ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Wierd SSB problem on my K2 on 20M
I agree...definitely the BFO is off...but dramatically. The listen for the zero beat of the noise test which worked before I removed old L33 and replaced it with the torroid version. I could tune through either side of the passband with the BFO. Then I changed all the crystals using the matched set and did the BFO temp stablilty mod. I need to recheck that to be sure I didn't yank a crystal that I wasn't supposed to. Initially the BFO High Freq was only 4915.52.I took 2 turns off of each side of the torroid (boy...that wire is friggin' thin!!!) and got the range up to 4915.99. But then I decided to do a practical test and listen in the headphones as I adjusted the BFO. Instead of getting the noise zero beat around 4913, the noise continued to drop until I ran hit 4915.99. So something is not right. I wonder if there was something that needed to be changed or adjusted when I replaced the stock crystals with the matched set? I'm going to leave the torroid winding alone at this point. I've been going for 24 hours without sleep and I think I'm getting slap happy with this. Maybe a fresh start in the morning will bring a new perspective. Tom K2TA - Original Message - From: Ron D'Eau Claire [EMAIL PROTECTED] To: 'Tom Althoff' [EMAIL PROTECTED]; Elecraft@mailman.qth.net Sent: Saturday, October 30, 2004 6:13 PM Subject: RE: [Elecraft] Wierd SSB problem on my K2 on 20M My guess is that the BFO is misaligned, Tom. The BFO frequency changes according to the Upper or Lower sideband, and I'll bet that if you check the CAL FIL function with the counter probe in the BFO test point, you'll see the SAME frequency for either Upper or Lower sideband. Ham bands below 20 meters normally use the lower sideband, and that's probably okay. But when the upper sideband was aligned, the BFO was set on the wrong side of the signal and so USB on 20 meters and up (all the way through 10 meters) will not work on USB. Ron AC7AC -Original Message- I know the BFO filter settings are saved with each mode and filter width...is there anything band specific that would cause the following symptoms... While listening to SSB signals: 160/80/40 LSB SSB OK 20M USB Rig seems to be stuck in LSB though the dial says u. Signals are unintelligable and appear to be wrong sideband or badly adjusted BFO setting 17/15/12/10 USB SSB OK I just checked it out on 20M SSB for the first time a few hours ago so it looks like #1117 is not quite ready to play full-time yet. Tom K2TA ___ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Wierd SSB problem on my K2 on 20M
Gosh darn it! I found out what I screwed up. I put 5 of the matched crystals in X7-X11, and instead of putting the other two in X5 and X6 I put them in X3 and X4, the BFO crystals! Sorry to waste bandwidth on the reflector with my wiring errors. I have a pile of crystals here that I pulled from the garbage. How do I identify the BFO crystals? Some say 4.91-S, some say 4.91-0195 etc etc. This is what happens when you try to do too much in one day! Any help on how to figure out which 2 of the 14 pullouts are the BFO crystals for X3 and X4? Thanks! Tom K2TA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 20 meter problem on new K2
I would forget checking relays for the moment. Take a look at the coupling capacitors for the 20m/30m circuit, the ones installed on the bottom of the board. Make sure solder flowed through to the top of the board for good connection to the traces up there. This was my 20m problem. 73, Joe, aa4nn I just noticed that my K2 build 43xx is almost totally dead on 20 meters. I think all the other bands are OK. I hooked up my N-Gen and could not hear anything on 20. I thought I could use a scope to follow the generators noise signal but the scope makes about as much noise as the generator when going through the bandpass circuit. I am guessing it is probably bandpass or low pass and I need to start checking to make sure the relays are making contact, etc.?? It worked when I built it a couple months ago and am not sure when it quit as I dont use 20 often. This K2 is totally optioned and I have removed the 100 watt PA to make sure it is not the culprit. Any comments on the best way to trouble shoot this? Thanks and 73, Rich kd0zv ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 20 meter problem on new K2
Thanks for the tips guys. After thinking about it, I am not 100% positive it worked when new. I do know it went through the alignment without problems, so I better check my wound coils just to be safe. Everything else seems to work OK and the only issue is lack of sensitivity on 20 meters. 73, Rich - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] ; elecraft@mailman.qth.net Sent: Saturday, October 30, 2004 7:16 PM Subject: Re: [Elecraft] 20 meter problem on new K2 A proper signal generator is just about essential to do the job. The problem is that you need a fair amount of signal to get any indication on the average oscilloscope. The normal method is to use an RF millvoltmeter to trace the path. You can use the Elecraft provided RF probe and a DVM providing you can inject an on frequency signal of sufficient level to work through the RX bandpass filters, etc. Elecraft give a figure of 140mV from the signal generator to carry out this test There is a good description how to go about it in the rev F, K2 manual Appendix E, Troubleshooting page 11. It is possible under extreme circumstances to use a TX into a dummy load as a signal source, but needs extreme care how you would extract sufficient level without smoking the RX front end. Much better to use a suitable signal generator. Bob, G3VVT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 20 meter problem on new K2
Did you seat the band pass filter trimmer caps, Rich? Many of those trimmer capacitors come from the factory needing to be twirled around a number of times to seat them so the sliding contact has electrical continuity. Just put your screwdriver in the slot and twirl it around a bunch of times, then re-try the alignment procedure. That CAN happen after the rig has been successfully aligned once. Apparently the contacts need a little 'exercising' to make them seat completely. Once that is done, they are fine. There's nothing wrong with the trimmers. That's the most common reason for a dead band, right up there with perhaps a dreaded PTTL (poorly-tinned-toroid-lead). Normally a PTTL won't make the rig quit though. It won't work from the first. If you didn't get ALL the enamel burned/scraped off of a toroid lead or you pulled the lead through the board passed the tinned segment so enamel-covered wire was in the hole, you might not be making electrical contact on that lead. Leads that aren't tinned properly look fine when soldered unless you look VERY closely at the wire. You'll often see a tiny ring of dark that looks like rosin around the conductor. It's actually the enamel. In that case the wire is trapped in the solder blob and won't pull out, but it isn't making electrical contact either. Ron AC7AC -Original Message- I just noticed that my K2 build 43xx is almost totally dead on 20 meters. I think all the other bands are OK. I hooked up my N-Gen and could not hear anything on 20. I thought I could use a scope to follow the generators noise signal but the scope makes about as much noise as the generator when going through the bandpass circuit. I am guessing it is probably bandpass or low pass and I need to start checking to make sure the relays are making contact, etc.?? It worked when I built it a couple months ago and am not sure when it quit as I dont use 20 often. This K2 is totally optioned and I have removed the 100 watt PA to make sure it is not the culprit. Any comments on the best way to trouble shoot this? Thanks and 73, Rich kd0zv ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 20 meter problem on new K2
Yes, I remember reading about seating the caps. So I gave those two about 20 spins and did not help. The radio seems to peak OK going through the alignment. Just seems to have no sensitivity. I just pulled out a TenTec RX-320 and a S-9 singal on the TenTec is only a single bar on the K2. I have to crank the audio almost all the way up to listen as well. I doubt in my case it is tinning problems. I am prone to do stupid things but I am pretty good with solder and removing the enamel on the wire. NOT to say it isnt possible. I am surprised I did not notice this before but as I said, I am never on 20. Its a significant difference in audio as you switch to 20. Just to be safe I will check trace to trace on the circuit board to make sure the torroids are making good contact :) 73, Rich - Original Message - From: Ron D'Eau Claire [EMAIL PROTECTED] To: 'Rich McCabe' [EMAIL PROTECTED]; 'Elecraft Reflector' elecraft@mailman.qth.net Sent: Saturday, October 30, 2004 7:54 PM Subject: RE: [Elecraft] 20 meter problem on new K2 Did you seat the band pass filter trimmer caps, Rich? Many of those trimmer capacitors come from the factory needing to be twirled around a number of times to seat them so the sliding contact has electrical continuity. Just put your screwdriver in the slot and twirl it around a bunch of times, then re-try the alignment procedure. That CAN happen after the rig has been successfully aligned once. Apparently the contacts need a little 'exercising' to make them seat completely. Once that is done, they are fine. There's nothing wrong with the trimmers. That's the most common reason for a dead band, right up there with perhaps a dreaded PTTL (poorly-tinned-toroid-lead). Normally a PTTL won't make the rig quit though. It won't work from the first. If you didn't get ALL the enamel burned/scraped off of a toroid lead or you pulled the lead through the board passed the tinned segment so enamel-covered wire was in the hole, you might not be making electrical contact on that lead. Leads that aren't tinned properly look fine when soldered unless you look VERY closely at the wire. You'll often see a tiny ring of dark that looks like rosin around the conductor. It's actually the enamel. In that case the wire is trapped in the solder blob and won't pull out, but it isn't making electrical contact either. Ron AC7AC -Original Message- I just noticed that my K2 build 43xx is almost totally dead on 20 meters. I think all the other bands are OK. I hooked up my N-Gen and could not hear anything on 20. I thought I could use a scope to follow the generators noise signal but the scope makes about as much noise as the generator when going through the bandpass circuit. I am guessing it is probably bandpass or low pass and I need to start checking to make sure the relays are making contact, etc.?? It worked when I built it a couple months ago and am not sure when it quit as I dont use 20 often. This K2 is totally optioned and I have removed the 100 watt PA to make sure it is not the culprit. Any comments on the best way to trouble shoot this? Thanks and 73, Rich kd0zv ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] (no subject)
Good Evening, The annual clock change has me working out a new set of numbers for the net. Thus tomorrow at 2200z it will be 4 PM here in the Pacific Time Zone. The frequencies will remain the same but the propagation seems to have improved. Our sun is back to near where it was a year ago happily ionizing our D, E, and F layers. I hope you can join us for a few exchanges. It has been mentioned (well actually it was at lunch today with N7NLU) it may be interesting for a few of you to interact a bit longer after each of the nets is over. I agree whole heartedly. Please use this net as a watering hole and either use the frequency after we're done or move a bit above and below it to meet up. The Thai food was good as was the conversation. Hopefully we will all try a bit of hiking together and then maybe a bit of Elecraft trail operating in the future. Please join us tomorrow on the Elecraft CW Net held: Sunday 2200z (Sunday 4pm PDT) 14050 kHz Monday 0100z (Sunday 7pm PDT) 7045 kHz Visit our web site: http://ecn.visionseer.com/ for further details. Thank you for the web space Dan. All are welcome on ECN; Elecraft radios are not required. See you tomorrow, Kevin. KD5ONS (Net Control Operator 5th Class) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Elecraft CW Net Announcement
Good Evening, The annual clock change has me working out a new set of numbers for the net. Thus tomorrow at 2200z it will be 4 PM here in the Pacific Time Zone. The frequencies will remain the same but the propagation seems to have improved. Our sun is back to near where it was a year ago happily ionizing our D, E, and F layers. I hope you can join us for a few exchanges. It has been mentioned (well actually it was at lunch today with N7NLU) it may be interesting for a few of you to interact a bit longer after each of the nets is over. I agree whole heartedly. Please use this net as a watering hole and either use the frequency after we're done or move a bit above and below it to meet up. The Thai food was good as was the conversation. Hopefully we will all try a bit of hiking together and then maybe a bit of Elecraft trail operating in the future. Please join us tomorrow on the Elecraft CW Net held: Sunday 2200z (Sunday 4pm PDT) 14050 kHz Monday 0100z (Sunday 7pm PDT) 7045 kHz Visit our web site: http://ecn.visionseer.com/ for further details. Thank you for the web space Dan. All are welcome on ECN; Elecraft radios are not required. See you tomorrow, Kevin. KD5ONS (Net Control Operator 5th Class) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
