Re: [Elecraft] K2 receive problem
No replies to this one yet, but I have spent a bit of time looking over the schematic and poking around with my DMM scope. Here's what I've found so far: TX (RD4 on the control board MCU) is normally low, 8T is 0 volts. When transmitting, TX goes high, Q3 turns on Q1 and 8T becomes 8 volts. RX (RD5 on the control board MCU) is normally low, 8R is 0 volts. When going into one of the CAL menu items or the ATU menu item, or between CW elements when transmitting (see my original message below), RX goes high, Q4 turns on Q2 and 8R becomes 8 volts. I haven't found a description of any of these signals anywhere, but it looks like TX and RX are MCU outputs; that TX should be high and 8T should be 8V when transmitting; and that RX should be high and 8R should be 8V when receiving. Is this correct? If I short Q2's collector and emitter to force 8R to 8V, or short Q4's source and drain to turn Q2 on and make 8R go to 8V, then the S meter starts acting normally, but I get no audio out - so I may have more than one problem. /MUTE maybe? I tried monitoring /MUTE with my scope, but putting a scope probe on that pin mutes the audio when the receive is on - the scope appears to be loading the circuit somehow. Floating pin? Assuming TX and RX are indeed MCU outputs, and that RX does get asserted under certain conditions, does this point to a bad MCU? Since RX *does* get asserted, I would suspect that it's *not* an issue of something pulling it low that shouldn't be. Any ideas? On Mon, 2004-06-14 at 07:20, Brian Mury wrote: I've just completed part 2 of my K2 RF board. I seem to have a problem on receive. I get no audio, and the S meter is reading maximum. If I select any of the CAL menu items or the ATU menu item, the receiver and S meter work normally. As soon as I exit the menu, it goes back to no audio and the S meter reading max. I can also receive between elements when keying. Anyone have any ideas what to check? -- 73, Brian VE7NGR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
[Elecraft] G4ZPY paddle and another
Yes, Gordon is producing keys again. They are very nice for sure. I had a VHS for 15 years, but recently sold it. I bought a hand made key by Alberto Frattini, I1QOD, for about the same price and like it better. Alberto, I understand is the European High Speed champ and a retired machinest. He also makes a miniature version appropriate for QRP and travel, though i haven't seen it, and a bug! To my knowledge only three of his paddles are in the US now. Mine is serial # 0055, double nickel. You can write Alberto at [EMAIL PROTECTED] He doesn't have a website. I would be happy if you mentioned my call sign if you write him, but please know, I have no connection, financial or other wise, just passing along another source of outstanding hand made paddles. e-mail me directly for a pix if you like. 72, Fred kt5x trustee, W5YA, High Desert Wireless QRP Ass'n ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] Re: KX1 relays switching
Humm - when I have the ATU in the tun position (yes, it's lowercase on mine) I hear the relay click each time I go from band to band including the jump from 30 to 20 - BUT - when I have the ATU in the CAL position, it does not click when going from 30 to 20 as described but does click on the other jumps. All seems to work correctly in both tun and CAL. Is there something wrong here? --don n4hh - Original Message - From: wayne burdick [EMAIL PROTECTED] To: Wim van der Zwan [EMAIL PROTECTED] On Jun 13, 2004, at 10:27 AM, Wim van der Zwan wrote: Hello Elecraft users, I have a KX1 with the options 30 m and tuner. the question is? Changing the bands from 40m to 30m, I can hear the relays switching. By changing the band from 30m to 20m, I can not hear the relays switching but 20m is Ok. and everything works fine. By changing from 20m to 40m, I can hear the relays switching. The questions is ? is that normale that by changing the bands from 30m to 20m no relays switching This is correct, Wim. 30 meters uses the 20 meter relay settings. The 30-meter band-pass filters are switched in using PIN diodes. 73, Wayne N6KR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
RE: [Elecraft] 80m Reflector problem
Thanks for the response. If it is an LDE, it is awfully consistent. I can hear it all the time now on 80m, at least for the past three days. Jerry , KG6KGP -Original Message- From: Guy Olinger, K2AV [mailto:[EMAIL PROTECTED] Sent: Tuesday, June 15, 2004 3:10 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; elecraft@mailman.qth.net Subject: Re: [Elecraft] 80m Reflector problem LDE's can be quite long. There were some notable one's reported in the last WPX contest. One happened to me. On 40 meters I was working a Guam station from the east coast, and had been hearing short echoes for a while. I sent my contest exchange, the other station QSL'd it and sent his end of contact CQ. That was followed by the LDE of my contest exchange in its entirety, which he QSL'd again. Which left ME a bit confused until I figured out what I had heard. Wish I had a recording of that. Easy to know it was my exchange because WPX exchange has a serial number in it. At this point, I'd guess that was delayed by better than two seconds, but could not say for sure. That would be some number of times going around the earth. Over the years I have heard the once around the earth delay many times. That one takes about the time of a sent dit, and is very confusing if you are using QSK. These can be very strong, and have heard it using the FT1000MP barefoot. Most often whatever path it is lasts 3-4-5 minutes and fades away. 73, Guy. - Original Message - From: Sverre Holm [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Tuesday, June 15, 2004 3:16 AM Subject: RE: [Elecraft] 80m Reflector problem I made several recordings ( I can forward them) and it looks like the signal is always approximately 1.52 seconds delayed and lasts about 1 second. It can't be long path propagation since 1.52 seconds works out to about 282,000 miles. It sounds as if you have experienced a long-delayed echo. But, then 1.5 seconds is longer than the typical LDE on 80 meters. The usual phenomenon in that band is via a travel path through the magnetosphere, and a delay of max 0.5 seconds. See phenomenon no. 1 on http://heim.ifi.uio.no/~sverre/LDE/ -- 73, Sverre ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] 80m Reflector problem
Jerry Hancock wrote: Thanks for the response. If it is an LDE, it is awfully consistent. I can hear it all the time now on 80m, at least for the past three days. If you hear it during the day, it most assuredly isn't any kind of ionospheric reflection or echo, since the D-layer absorbtion on 80 meters is too high to permit this. It really does sound like some kind of transponder. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
[Elecraft] Headband Magnifier - Father's Day Gift?
Fellow builders, Having built several projects recently (K2, Emtech ZM-2 and Inrad #352 roofing filter kit for my Orion), I recently bought a Headband Magnifier on eBay in preparation for building KD1JV's AT Sprint II which makes extensive use of surface mount parts. I just received this Magnifier yesterday and thought others might be interested. Total cost is $9.80 with Priority Mail shipping and Gadgetman is a pleasure to do business with: http://www.auctionworks.com/store/itemDetail.asp?sid=2004061509594149470684sfid=14420id=6658256 Although this product is made of plastic, it is a fraction of the cost of a glass Optivisor with comparable lenses and loupe. I have no connection with Gadgetman other than being a very satisified customer. 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
FW: [Elecraft] 80m Reflector problem
I just fired off a bunch of tripple-gallon (15 W) dits on 3505. No echos heard from Northwest Georgia. Anyone else hear it? Let's see if it's localized. I'm at N 34 54 22 W 85 26 21. Dan / WG4S / K2 #2456 snip I can hear it all the time now on 80m, at least for the past three days. /snip ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] Application Note: KX1 S-meter calibration procedure
On Jun 14, 2004, at 6:50 PM, David Toepfer wrote: This procedure got an initial nod from Wayne so I am posting it to the list for broader peer review as it were... Thanks, David. To anyone attempting this procedure: - Calibrating the S-meter is a bit tedious by whatever method you use. I hope to make the KX1's S-meter much easier to calibrate in the future. - It's likely that only a very small range of S-meter menu parameter values will be usable, since they depend only on the accuracy of the 5- and 6-volt regulators. So a faster method might be to start with the average values used by all builders, then tweak them up/down over a very small range. - Clearly, the S-meter function of the KX1 is secondary in importance to the rig's other features. There are only six bars, limiting its utility no matter how well you calibrate it. 73, Wayne N6KR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
RE: [Elecraft] Headband Magnifier - Father's Day Gift?
Wow! That is a low price!! One of the things I like best about the Optivisor is that, like this device, it is binocular. I didn't get the loupe with mine and have never missed it (used an Optivisor for nearly 25 years so far). What I do to adjust the magnification for really CLOSE work when needed is to wear my reading glasses with it. When I want a little less magnification, I just take off my reading glasses (or slide them down where I can look over them like I do any time). That's the second real advantage of this type of aid - you can use it with or without supporting eyeglasses. Where I've seen cheaper lenses go bad is when they aren't optically correct - have distortions and imperfections in the lens itself. One test I use is to hold the lens in front of me and rotate it while looking through it at a straight edge. If the line bends or bows, the lens isn't good (unless it happens to be a prescription lens ground to correct astigmatism G). It sounds like you got some good lenses in yours. Ron AC7AC -Original Message- Fellow builders, ...I just received this Magnifier yesterday and thought others might be interested. Total cost is $9.80 with Priority Mail shipping and Gadgetman is a pleasure to do business with: http://www.auctionworks.com/store/itemDetail.asp?sid=200406150959414 9470684sfid=14420id=6658256 Although this product is made of plastic, it is a fraction of the cost of a glass Optivisor with comparable lenses and loupe. I have no connection with Gadgetman other than being a very satisified customer. 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Fw: [Elecraft] OT: Long loop antennas
- Original Message - From: Stuart Rohre [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Tuesday, May 25, 2004 10:54 PM Subject: Re: [Elecraft] OT: Long loop antennas Yes Rhombics are fun. Back in the Army MARS program days for me; I helped out at the Fourth US Army Command MARS station at Ft. Sam Houston. They occupied, for awhile, a hill station that had been used by the Signal Corps pre WW2 and during. They had Rhombics aimed at Canal Zone and South, China, Washington DC and Europe, and maybe another. A barefoot KWM2 was all you needed to work the world, (100 watts or less). Like shooting fish in a barrel. Just takes too much real estate. You can have fun with loops with omni directional coverage more nearly than the bi directional coverage of the Rhombic without termination. The Army Rhombics were terminated with 600 ohm non inductive resistors as I recall. Made them unidirectional. -Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
[Elecraft] Socket IC's
Hello All , I have K1 1850 up and running and a K2 in the box to assemble when time permits. When assembling the K1 several IC's were soldered directly to the RF board. When I build the K2 , Is there a reason for not using an IC socket soldered to the various boards rather than direct soldering an IC to the boards ? It seems logical that for future upgrades and component replacements a socket would make more sense. Anyone building a K2 use IC sockets ? Tnx Glenn K5ZE ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
RE: [Elecraft] 80m Reflector problem
Sorry, I am near San Francisco. Jerry, KG6KGP -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dan Barker Sent: Tuesday, June 15, 2004 8:51 PM To: Elecraft Subject: FW: [Elecraft] 80m Reflector problem And where is here? Dan snip I am on 3785 sending dots. /snip ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
[Elecraft] VOLTAGE PROBLEM ON MY K2
Hello to all I build my K2 (S/n 4133).Work 100% on received mode,but on tx mode have the nexy problemHi current.I check all,and i find that my K2 is on TX the collector of Q2 on Control Board have 3' 52 volt.I removed this transistor (2n3906) and i put another new,but the problem is the same,I check the D6 also and is good.Need help. Thank you all of EA7HG,Eugenio ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] Socket IC's
Glenn Haffly wrote: Is there a reason for not using an IC socket soldered to the various boards rather than direct soldering an IC to the boards ? Glenn, IC sockets are generally appropriate only for ICs containing firmware which may need upgrading. For almost all other situations, the use of IC sockets is a bad, obsolete, and very poor-engineering practice that can do nothing but reduce unit reliability and performance. Most importantly, Elecraft wisely discourages this practice and has officially stated that performance problems due to the use of IC sockets that were not specified in Elecraft's design will **NOT** be covered by warranty. The last sentence says it all. 73, Mike / KK5F ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] Socket IC's
Hi This question comes up from time to time with new builders. You should not use sockets except where Elecraft provides them. The use of sockets in RF circuits will add capacitance and/or inductance and may cause the circuits performance to degrade. None of the mods to date have required removal of an IC except for the firmware upgrades and those IC are already in sockets. Sockets also add height to the part and may cause clearance problems when the boards are assembled or an option is added at a later date. Lastly a part installed in a socket is less reliable than a properly soldered part. Bottom line don't waste you time and money. Build your K2 exactly as the manual describes. I have built 14 K2's and never used any sockets other than the ones supplied. Don Brown KD5NDB - Original Message - From: Glenn Hafflymailto:[EMAIL PROTECTED] To: elecraft@mailman.qth.netmailto:elecraft@mailman.qth.net Sent: Tuesday, June 15, 2004 5:26 PM Subject: [Elecraft] Socket IC's Hello All , I have K1 1850 up and running and a K2 in the box to assemble when time permits. When assembling the K1 several IC's were soldered directly to the RF board. When I build the K2 , Is there a reason for not using an IC socket soldered to the various boards rather than direct soldering an IC to the boards ? It seems logical that for future upgrades and component replacements a socket would make more sense. Anyone building a K2 use IC sockets ? Tnx Glenn K5ZE ___ Elecraft mailing list Post to: Elecraft@mailman.qth.netmailto:Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htmhttp://mailman.qth.net/subscribershtm Elecraft page: http://www.elecraft.comhttp://www.elecraft.com/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] Socket IC's
Sigh... On Jun 15, 2004, at 3:26 PM, Glenn Haffly wrote: Hello All , I have K1 1850 up and running and a K2 in the box to assemble when time permits. When assembling the K1 several IC's were soldered directly to the RF board. When I build the K2 , Is there a reason for not using an IC socket soldered to the various boards rather than direct soldering an IC to the boards ? It seems logical that for future upgrades and component replacements a socket would make more sense. Anyone building a K2 use IC sockets ? Yes. Several very good ones. 1) Sockets are mechanical devices and will fail over time mostly due to oxidation. 2) Sockets add inductance and / or capacitance to the circuits into which they are inserted, disturbing ICs which involve tuned circuits. This can lead to an inability to tune various parts of the radio. 3) Sockets add height to the ICs. Space inside the K2 is at a premium, especially vertical height. Many of the modifications and options make use of this vertical space. Socketing ICs may very well limit your ability to add these options or modifications. The ICs which would be changed for upgrades is pretty much limited to the microcontrollers. These are socketed to allow their replacement when upgrades are issued. Don't socket the other ICs unless you really want to regret it or are VERY handy with a desoldering tool... ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
[Elecraft] Late but hopefully not to late -- Adjustment of Bug
There was a question a while back on the adjustment of a bug. Can't remember exactly when but I did find the web page [?? Would you believe mine ??] www.aa8vs.org/nren/page3.htm There are two formats M$ Word and PDF format. 73 Chuck AA8VS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] K2 needed for Hamcom QRP demo booth
On Tuesday 15 June 2004 20:00, W5TB wrote: Hi Bud -- that would be terrific! The QRP booth has an antenna for the first time in HAMCOM history and I've arranged for use of teh FISTS call KN0WCW. I can provide a 7.5ah gell cell and power cord for the K2. How about a paddle? Do we need a tuner (there is a committee putting up antennas and we've given them 7040 and 14060 for resonance, but... ? The booh is in the NW corner of teh exhibit area and we'll be setting up starting about 9 on Friday. Hi Doc, My K2 has the KBT2 internal battery and KAT2 tuner. I have a set of Palm paddles, not sure if that's the best for demo purposes. I will have a power supply also. I will drive down Friday, should be in town mid afternoon. 73, -- Bud Rogers [EMAIL PROTECTED] KD5SZ EM05vb K2 #4115 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] Socket IC's
And don't forget the most important reason -- You haven't lived until you've removed the wrong 16 pin IC from the right spot on a PC board. (The first IC I installed was in the wrong place, and that's why I posted the same question as Glen) Tom WB2QDG K2 1103 -- One thing I don't like about this country is that everyone gets to have his own opinion on things! -Original Message- From: Glenn Haffly [EMAIL PROTECTED] To: elecraft@mailman.qth.net elecraft@mailman.qth.net Date: Tuesday, June 15, 2004 5:49 PM Subject: [Elecraft] Socket IC's Hello All , I have K1 1850 up and running and a K2 in the box to assemble when time permits. When assembling the K1 several IC's were soldered directly to the RF board. When I build the K2 , Is there a reason for not using an IC socket soldered to the various boards rather than direct soldering an IC to the boards ? It seems logical that for future upgrades and component replacements a socket would make more sense. Anyone building a K2 use IC sockets ? Tnx Glenn K5ZE ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] New convert
KC0QZX mentioned: I work on a ship that goes to Japan, China, Taiwan and Korea. I am presently getting my tickets to run from these countries while I'm dockside. I hope to see a lot of you on 20-40 meters in the future. In Taiwan the mainland, I believe the best you can do will be a permit to operate an existing station... seriously doubt you will be able to lawfully operate your own station on board a foreign flagged ship from dockside in either place. 73, VR2BrettGraham ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] k2 audio power
My Sony MDR 7506's have a DC resistance of 72 ohms per side. Since the phones are in parallel, the rig will see about 36 ohms. I am not sure how that relates to impedance but it seems in the ballpark. Heating and reactance would increase it some but I don't know by how much. They are comfortable and very sensitive. I bought them because of good reviews on eham. 73 - Rick - K7MW Sony MDR-7506 and MDR-V6 -- these are standard, large, closed headphones with nice soft cushions, work for for long operating sessions. These sell in the $100 range. Sony, being Sony, doesn't put impedance and sensitivity specs on the data sheets that I have, but I suspect they are in the same range as the ER4S's. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
Re: [Elecraft] Featherweight Yagi Design Questions
Jack, Yes, the beam could be shortened with helical wound elements of wire. This was a beam shown in the ARRL Handbook way back, not sure if 1957 or when. You could even make the elements of ham sticks! You can fed one side with a monopole approach to get impedance matching, see the Kent Brittain designs of cheap VHF beams in CQ VHF magazine. He may also have them on the web, all wire elements there, too. The Gotham vertical and beams of the 1950's all used thin Aluminium tubes for elements and gamma matches for the beams. GL and 72, Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
