[Elecraft] KPA100 Low Power on 30m 20m bands
Hi, I have completed the final alignment and test of my KPA100 amplifier which is working well in almost every respect other than relatively lower power output on the 30m and 20m bands. Measured power output is as follows: 80m 117W 40m 113W 30m 71W - initially flashes Hi Cur message 20m 75W - initially flashes Hi Cur 18m 105W 12m 103W 10m 99W Power output measured at antenna socket across 50 ohm load using Tek scope and calulating Pwr = Vpp^2/400. I have checked the inductors and capacitors in the two LPF chains. Everything appears ok, i.e. correct toroids used wound with correct number of turns. All capacitors check out as correct value with correct placement. CAL CUR set at 3.5 as indicated in setup. Power output displayed on K2 matches calculated output power to within 2-3W. K2 running barefoot gives more than 10W on all bands. Help please! Where do I look next? Barry G4RKO K2 - 4703 ___ 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] KPA100 Low Power on 30m 20m bands
Barry, Hard luck but do not worry, you are not alone! You are the third that we know of in the UK and there was another in the USA. Let Gary Surrency at support know. In my case, a scope along the RF chain showed that there were signal voltage (and estimated current) losses across the base drive RC network to Q1,2 on the affected bands only. The problem has been temporarily cured by doubling the size of C80,81 in my case and Larry's, G0IKE. Elecraft are investigating and we are awaiting an explanation and cure. 73, Ted G7BQM K2 #4732 On 25 May 2005, at 08:35, Barry Cooper - Relcom wrote: Hi, I have completed the final alignment and test of my KPA100 amplifier which is working well in almost every respect other than relatively lower power output on the 30m and 20m bands. Measured power output is as follows: 80m 117W 40m 113W 30m 71W - initially flashes Hi Cur message 20m 75W - initially flashes Hi Cur 18m 105W 12m 103W 10m 99W Power output measured at antenna socket across 50 ohm load using Tek scope and calulating Pwr = Vpp^2/400. I have checked the inductors and capacitors in the two LPF chains. Everything appears ok, i.e. correct toroids used wound with correct number of turns. All capacitors check out as correct value with correct placement. CAL CUR set at 3.5 as indicated in setup. Power output displayed on K2 matches calculated output power to within 2-3W. K2 running barefoot gives more than 10W on all bands. Help please! Where do I look next? Barry G4RKO K2 - 4703 ___ 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] kpa800 question
It has band pass filters in the output - similar concept to the K2/100. I believe Eric said it is Pi-L. There is no antenna tuner in the amp. N2TK, Tony -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Lee Buller Sent: Tuesday, May 24, 2005 11:19 PM To: David Toepfer; Elecraft Reflector Subject: Re: [Elecraft] kpa800 question What I found is that the amp needs to have around 50 watts to be driven to full output. There is a rule with the FCC that requires higher drive for full output so other types (CB types) can't put in 5-watts and get out 800 watts. So, the by rule the amp is limited in drive...I think it is 13 db, but I am not sure. The amp is a stand alone and can be used with any rig. It is 80% the size of an Alpha It has a built in antenna tunner. PIN Diode switching and a switching power supply. Fully metered too. Lee - K0WA Common sense is in short supply - get some and use it. If you can't find any common sense, ask for help from somebody that has some common sense. - Lee Buller ___ 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] kpa800 question
N2TK, Tony said There is no antenna tuner in the amp. Tony I believe you are mistaken. I spent some time talking to Eric at Dayton and also to Dick K4XU, the semiconductor applications engineer involved in the design. They left me with a firm impression the amp has an auto-tune atu built in, together with a switch mode psu. The 800W version is to be available in part constructed kit form and also fully built. Timescales appear to Fall 05. A full 1500W is also planned and availability will lag the 800W version by a few months. The 1.5kW amp will have an external psu on which the amp can stand. Overall size of the amp is approx 80% the size of an Alpha 87A, with which it shares similar styling. The 800W version is also planned to be field upgradable to the 1.5 kW spec. Bob, 5B4AGN, P3F ___ 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] SAFETY BELT - SOLD
Thanks for your responses. The safety belt has a new home. 73, ed - k9ew ___ 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] SWR and Power readings RE: K2
Hi, I have a question concerning antenna power and SWR. I am setting my K2 power at 5 watts via CAT. The K2 display reads 4.3 F, 0.0r. An external watt/SWR dual meter reads 5.9 +/- 0.2 Fwd and a small value which can't be read accurately, Rev. A Tandem SWR/Power meter reads 7.2 +/- 0.2 watts and a SWR of 1.2 +/- 0.1. The question is, if the SWR is not 1:1, does the power reading which is based on the voltage in a 50 ohms load read high or low? I don't think any of my meters have SWR compensation in the power level reading, if there is any. The Tandem has compensation for diode nonlinearity in low power readings. I had measured the following on the antenna a few days ago using a AIM430 antenna analyzer: http://w5big.home.comcast.net/sitemap.htm SWR 1.1:1 +/- 0.1, Zmag 48.5 +/- 0.5 ohms, Theta +5 +/- 2 degrees, Xs, a small + value, can't read it accurately. I am using the KAT2 so what the K2 display reads on r is probably correct or it is less than 0.1 which is the LSD. Also, if the power level is set by the K2 CAT at 5.0 watts, why is the K2 display reading 4.3 watts? If I have a very accurate wattmeter, can I calibrate the K2 wattmeter? How about calibrating the CAT setting? I probably can get a more accurate reading on the Tandem by using a DVM set on current in series with its meter(s). 73, Chas, W1CG ___ 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] SWR and Power readings RE: K2
The question is, if the SWR is not 1:1, does the power reading which is based on the voltage in a 50 ohms load read high or low? It depends :-) If the SWR is 2:1 and is caused by low impedance (e.g., 25 ohm load) then the voltage will be lower for a given power. If the SWR is caused by a higher impedance (e.g., 100 ohm load)) then the voltage will be higher. Lyle KK7P ___ 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] SWR and Power readings RE: K2
Chas, Since you have the KAT2 installed, it may be simply a matter of calibrating the internal wattmeter in the KAT2. If you are using TUNE, be aware that TUNE may produce a power output that is different from the requested power by up to 0.5 watts (up to 5 watts with the KPA100). While you can use an external wattmeter for calibration, I really don't trust any of them (check their specs - usually 20% of full scale is the speced accuracy, and that is 2 watts on a 10 watt scale). I use a 'scope across a good 50 ohm pure resistance and the formula Vp-p^2/400 when calibrating the forward power (an RF probe could be used instead). I also have a 25 ohm and 100 ohm non-reactive dummy load that I use when setting the SWR at the 2:1 point. In general, I have found that the REFL pot on the KAT2 must be set more clockwise than the FWD pot to obtain the proper 2:1 SWR calibration. Additional note - if the SWR with the 25 ohm load is different than the 100 ohm load, the balance trimmer cap is not set properly - if you have similar loads, you can nudge the trimer a bit until the SWR reported is the came with both loads. Additional note - the KPA100 and the KAT100 reflected power pot WILL be set nearly the same as the position on the FWD pot - but the KAT2 settings will differ quite a bit. 73, Don W3FPR -Original Message- I have a question concerning antenna power and SWR. I am setting my K2 power at 5 watts via CAT. The K2 display reads 4.3 F, 0.0r. An external watt/SWR dual meter reads 5.9 +/- 0.2 Fwd and a small value which can't be read accurately, Rev. A Tandem SWR/Power meter reads 7.2 +/- 0.2 watts and a SWR of 1.2 +/- 0.1. ... Also, if the power level is set by the K2 CAT at 5.0 watts, why is the K2 display reading 4.3 watts? If I have a very accurate wattmeter, can I calibrate the K2 wattmeter? How about calibrating the CAT setting? I probably can get a more accurate reading on the Tandem by using a DVM set on current in series with its meter(s). 73, Chas, W1CG ___ 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 -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.16 - Release Date: 5/24/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.16 - Release Date: 5/24/2005 ___ 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] Mic gain
I've changed R14 to 5.6k to increase mic sensitivity using SSBA=2. I then bought the MH2 mic which is matched to the K2. Reports said I was clipping and degrading the audio, so I set SSBA to 1. Quality is now fine. Can I assume that the MH2 is matched to the K2 with R14 at 1k (as original) and SSBA=2? Thanks David G4CWB ___ 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 CW Reception
I am building K2 #4901 and have just completed Assembly Phase II. Everything checked out fine. I put the K2 on an antenna and listened to some 40 meter CW. I observed that when the frequency changed on stronger signals, the CW note became chirpy, as if there were two signals. I set the tuning rate to 10 Hz and as the frequency changes at that rate it is really noticeable. It sounds much like my Orion when I have the tuning rate set to 100 Hz or higher. I have not seen anything on the reflector that addresses this problem. Has anyone else experienced this? 73, Jim, K4ZMV ___ 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] Cannot hear internal ref. signal
Update: After some coaching from Gary and another gentleman on the reflector, I was able to use my wideband noise generator to inject a signal and traced it down to one missing capacitor near U1. After that, I finished Alignment phase II, installed the rest of the parts and completed phase II with no issues. Tonight will be a final test tune and try and get on the airwaves. I just received two cans of water-soluble flux remover in the mail and I can turn my attentions to my other dead-in-the-water K2 next week. I highly recommend the toroid winding service. Mychael has always gotten them in the mail quickly and for a guy on a busy schedule like me. This is money well spent for the time and frustration saved. 73, John KD7ZYR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Bonk Sent: Monday, May 23, 2005 1:28 PM To: elecraft@mailman.qth.net Subject: RE: [Elecraft] Cannot hear internal ref. signal Update: At lunch I used the signal tracing handout and could not inject a signal into TP#1 and hear any change at all. I verified all the parts and installation direction of all the items in the handout as well as reflowing the solder points with no change. One item of note is that the static hiss does change at all when changing freqs by moving the knob or by changing bands with the BAND +/- buttons. 74, John KD7ZYR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Bonk Sent: Monday, May 23, 2005 9:19 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Cannot hear internal ref. signal Hello all, I am working on the 2nd of my two K2 kits while my first is waiting for some flux-off and have reached the IF Amplifier Alignment and cannot hear the internal signal. All resistance checks and alignment up to the point has been without issue. I checked and rechecked the board for solder problems last night without any luck. Any suggestions on where I might focus my search? 73, John KD7ZYR ___ 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 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] Masking tape K2?
Hi, I'm building K2 #4904 as a follow-up to my K1. My manual says (at page 29) Some holes in the front panel was masked... I have no mask-tape over the holes, and there has never been any tape over the holes. It's painted grey on both sides. What is the purpose of masking? 1) Just a manufacturing thing? 2) To get un-painted metal for better grounding of the box? How do I move on from here? Best 73 de SM0RVV K1 #1978 K2 #4904 (1/4-built) ___ 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] Power Output Specs
(Possibly) stupid questions: 1. Does my thru-line wattmeter indicate RMS or P-P power? 2. Are TX/Amp power output specs given in RMS or P-P? I thought I understood this, but recent reflector traffic leads me to question that belief. Fred K6DGW Auburn CA CM98lw ___ 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] Power Output Specs
1. Does my thru-line wattmeter indicate RMS or P-P power? Typically RMS, but there is a time constant involved in the meter movement, and some versions are/can be peak reading. Keep in mind that most wattmeters, thru-line included, don't actually measure power but voltage induced in a directional coupler, and are only at their rated accuracy when they are terminated in the load for which thy are designed, usually 50 ohms non-reactive. 2. Are TX/Amp power output specs given in RMS or P-P? Usually RMS, but might be peak envelope power (PEP). CW ratings are usually RMS; SSB ratings are usually PEP. The KPA100, for example, is rated at 100 watts output power into a 50-ohm non-reactive load. If you are in CW, this is the carrier (RMS) power. If you are in SSB, this is the PEP rating. Enjoy! Lyle KK7P ___ 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] Power Output Specs
Fred and all, Your power meter will try to show either average or peak power - no relationship to RMS for either of these. Extended 'TECH TALK' follows: Power is always computed using RMS values. For power measurements, there is some sense in referring to either INSTANTANEOUS power or AVERAGE power. Whether a meter can really read true instantaneous power depends on the meter itself, but some will show the peak power in a particular increment of time - most meters simply provide an average power reading - I put the 'average' term in quotes because a meaningful average must also specify the time over which the average is taken, and most meters I have encountered do not do that, they simply depend on the latency of the meter movement to average things out - that is usually OK because the real number we are usually looking for is the number displayed when we hold the key down for a bit - this is what we refer to as PEP (OK, PEP with speech is more complicated - look in the reference books on the subject for the nuances). Most common amateur grade power meters that provide 'peak' readings are just charging up a capacitor to slow the meter response down so the meter retains the higher reading for a bit - just how long and how accurate it is depends on the speech pattern and the judgement of the meter designer for 'how long is long enough?'. Just so there is no mis-understanding, power in a wave cycle is computed with RMS values of voltage (or current), but zero to peak voltages or peak to peak voltages can be used if the proper math is performed to obtain the RMS value - if the waveform is a sinewave, the RMS value is V(0-p)*(sqrt 2)/2 or Vp-p*(sqrt 2)/4. Sorry, but these quanties are difficult to show in text mode (no subscripts, etc. available). 73, Don W3FPR -Original Message- (Possibly) stupid questions: 1. Does my thru-line wattmeter indicate RMS or P-P power? 2. Are TX/Amp power output specs given in RMS or P-P? I thought I understood this, but recent reflector traffic leads me to question that belief. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.16 - Release Date: 5/24/2005 ___ 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] What I forgot to ask at Dayton...
And that is, who has, or who is going to get K2 SN # 5,000 ? Maybe Eric and Wayne should have had a raffle for it! tom bosscher K8TB K2 SN 3206 ___ 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] Let me build your next Elecraft kit.
I have built 90 K2's to date, and many of the other Elecraft kits. Let me build your radio. My rates are reasonable and you get a built radio ready to play. 73 Alan W1HYV ___ 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] What I forgot to ask at Dayton...
- Original Message - From: Tom Bosscher [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Wednesday, May 25, 2005 1:34 PM Subject: [Elecraft] What I forgot to ask at Dayton... And that is, who has, or who is going to get K2 SN # 5,000 ? Maybe Eric and Wayne should have had a raffle for it! tom bosscher K8TB K2 SN 3206 Motion seconded! Maybe $20 a piece? Sell 25 tickets and you break even but I'll bet WAY more than 25 tickets get sold! I'd buy 5 myself. Ken -- Just my 2¢ worth... 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #1055, Digital On Six #350, Proud builder owner of Elecraft K2 #4913 -- Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.16 - Release Date: 5/24/2005 ___ 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] kpa800 question
Oh, no, I was not hoping for full power out with 5W in. I was just wondering if I could expect up to 100W out with 5M in (assuming a max 13dB gain), or is it somehow limited or inefficient with such low drive power. I would just like to have only one amp I could use to bring something like a K1 or K2 up to 50-100W and also use to bring a a 40W AM/CW rig up to 800W. I guess I may just have to wait until the web site announces official specs and ask when I see them. dt . --- Lee Buller [EMAIL PROTECTED] wrote: What I found is that the amp needs to have around 50 watts to be driven to full output. There is a rule with the FCC that requires higher drive for full output so other types (CB types) can't put in 5-watts and get out 800 watts. So, the by rule the amp is limited in drive...I think it is 13 db, but I am not sure. The amp is a stand alone and can be used with any rig. It is 80% the size of an Alpha It has a built in antenna tunner. PIN Diode switching and a switching power supply. Fully metered too. Lee - K0WA Common sense is in short supply - get some and use it. If you can't find any common sense, ask for help from somebody that has some common sense. - Lee Buller ___ 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] What I forgot to ask at Dayton...
I asked if #5000 was available when I bought #4941 at Dayton and the lady helping me actually went to the stack of K2 boxes and looked to see if it was there. I got the impression she would have handed it me if it had been there. She said she didn't see it. It's possible it's not that big of a deal to them. Craig K1 #1966 K2 #4941 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Bosscher Sent: Wednesday, May 25, 2005 1:34 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] What I forgot to ask at Dayton... And that is, who has, or who is going to get K2 SN # 5,000 ? Maybe Eric and Wayne should have had a raffle for it! tom bosscher K8TB K2 SN 3206 ___ 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] K2 #4764 with options finally ready today!
Yes folks, my K2 finally is ready with all options: SSB, Noise-Blanker, DSP, 160 m and 100 W-PA. I finished it 5 minutes ago. Everything is working well. The few things, that did not work right from the beginning had my own stupid faults as their reason. For all this, I spent about 55 hours. It has been a great pleasure to see the rig completing, testing it inbetween and having success at various stages. The kit is just fantastic. The description is very well. Too bad actually that it is completed. I could go on more. I am very happy with the results. Inbetween I already made qso with the barefoot K2 and was amazed about the receiving performance (also about how many contacts are possible qrp!) Yes, it has been the right decision to go for the K2. 73 Karsten DK4AS ___ 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] kpa800 question
Buy a KPA800 AND a KPA1500 and get full legal output for 5W drive. Sounds ideal. David Toepfer wrote: Oh, no, I was not hoping for full power out with 5W in. I was just wondering if I could expect up to 100W out with 5M in (assuming a max 13dB gain), or is it somehow limited or inefficient with such low drive power. I would just like to have only one amp I could use to bring something like a K1 or K2 up to 50-100W and also use to bring a a 40W AM/CW rig up to 800W. I guess I may just have to wait until the web site announces official specs and ask when I see them. dt ___ 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] Masking tape K2?
On Wed, 2005-25-05 at 18:27 +0200, Erik Linder wrote: My manual says (at page 29) Some holes in the front panel was masked... I have no mask-tape over the holes, and there has never been any tape over the holes. It's painted grey on both sides. The holes that are masked are in the four corners, on the top and bottom edges, not on the front. They are the screw holes for the 2D connectors that hold the case together, not the holes for the front panel controls and connectors. Are you sure they are not masked? The masking tape will have been painted over, and if the bit covering the actual hole has been poked out, it can be hard to tell that it is there. I had a couple that I thought hadn't been masked until I looked very carefully. What is the purpose of masking? 1) Just a manufacturing thing? 2) To get un-painted metal for better grounding of the box? Number 2 - for grounding. If you install a KPA100 you'll have to grind the paint of the inside of the side panels in a couple spots. How do I move on from here? Good question. If they really weren't masked, you may want to scrape/sand/grind the paint off around those holes. I'm not sure how much it would really matter. -- 73, Brian VE7NGR ___ 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] Dayton, Eric, Wayne N0SS (Tom)
My first trip to Dayton Hamvention the highlight was getting to meet Eric, Wayne, Tom Hammond (N0SS), Lerma, others who were helping show the K2 all its brothers sisters. Eric showed me photos of the K2 afterburner. (I also met Chip of Tonight Show fame a teenager who had one $64K? on Jepoardy) 73, Lynn, K5AVJ ___ 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] kpa800 question
That was going to be my question...if it is controllable from the K2 like the KPA100 is. Sort of like the transverters, designed for the K2, but can be used with other rigs. Stan Rife W5EWA Houston, TX K2 S/N 4216 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Sent: Tuesday, May 24, 2005 9:44 PM To: 'David Toepfer' Cc: elecraft@mailman.qth.net Subject: RE: [Elecraft] kpa800 question The amp I saw Friday at the FDIM hotel was an independent unit. While the specific question did not arrise during QA with Wayne Eric, it would be difficult to imagine a design of this class *requiring* a K2 to drive it. I did not note any special control cable from the K2/100 to the amp. 73, Steve aa8af -Original Message- Is it too early to start asking questions about this? I am wondering, will the KPA800 have to be closely tied to the K2 like the KPA100 is, or will I be able to use it with other gear as well and with less than 50-100W in? I ask because I was considering the idea foregoing the purchase of a KPA100 this year and just waiting for a KPA800 to use to kick the K2 5-10W in up to 100W, but also to use with other gear to kick them up to 800W. I would buy one if I can use it this way, but don't have as much use for one if it can not be. Also, will there be a KAT800? :-) dt ___ 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] kpa800 question
G'day all, All this talk about 800W amps is interesting, however, due to oil prices the power company here has had to shove up the price per kWh to about 27c US. I'll stick with more and better high level aluminium which sucks as well as blows. Less potential TVI too. Regards, Mike VP8NO ___ 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: Elecraft Digest, Vol 13, Issue 27 Balanced Automatic Tuners
Balanced Line Tuners
I don’t think you really want an Automatic tuner from Elecraft -- unless
they perhaps decide to venture into a new nitch in terms of a superb KW tuner
that works well with their and other radios.
First the reason that I say KW TransMatch is that you have to think in terms
of at least 100 Watt power levels of the K2100 and most other transmitters
of our day. If you are going to tune out what may well be a 10:1 or even
greater reactance at 100 Watts, that could be thousands of volts. The tuner
design
must accommodate this.
I would welcome seeing Elecraft or any manufacturer produce a software
driven ‘truly balanced tuner’. Nothing like this now exists on the market.
There
are and have been some such unbalanced tuners that will match an antenna in
the middle hundreds of Ohms. Even these won’t go beyond 600 or 800 Ohms, and
that is simply not enough for a well engineered station.
A software {or firmware} driven TransMatch that would tune from about one
half Ohm, to about 2000 Ohms, and handle the reactive voltages that may be
imposed at considerably higher power levels would be quite intriguing!
73! de John WA6BFH
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Re: [Elecraft] kpa800 question
I agree, but, some of us have no room/permission for an antenna that is worth anything, and have to make up for it somehow. dt . --- Mike Harris [EMAIL PROTECTED] wrote: G'day all, All this talk about 800W amps is interesting, however, due to oil prices the power company here has had to shove up the price per kWh to about 27c US. I'll stick with more and better high level aluminium which sucks as well as blows. Less potential TVI too. Regards, Mike VP8NO ___ 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] kpa800 question
On May 24, 2005, at 11:19 PM, Lee Buller wrote: It is 80% the size of an Alpha So, is that 80% of the external dimensions, or 80% of the volume? Is this the size of an EC2, or considerably larger? Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 ___ 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] Hex Key Cover
Hey Elecrafters, One of the things that followed me home from Dayton was an Elecraft Hex Key. Eric mentioned that there is a fella out there who makes covers for it. Would some kind soul post the email or web address of the cover maker? 72, Preston Douglas WJ2V ___ 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] kpa800 question
My electric bill came today and it worked out to 11.7 cents/kwh. I suppose I could then afford to run a kw, but as you say, a bunch of aluminum up high (TH7DX @ 65') works both ways. With a linear, you pay so that the guy at the other end has an easier time of it! It's not going to be on my Christmas List to Santa this year, but I think it will be good for the Elecraft brand name, and that eventually helps us all. Eric KE6US -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Harris Sent: Wednesday, May 25, 2005 3:35 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] kpa800 question G'day all, All this talk about 800W amps is interesting, however, due to oil prices the power company here has had to shove up the price per kWh to about 27c US. I'll stick with more and better high level aluminium which sucks as well as blows. Less potential TVI too. Regards, Mike VP8NO ___ 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] Transverter for 70cm?
Is there a possibility of one for 70cm would love one! George NE2I ___ 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] Installing C56 on Pins 2 and 3 of K1
I need a little assistance from other KX1 builders out there. The manual states to solder the capacitor C56 between pins 2 and 3 of the relay K1 (page 34, right side, second step). How do I determine which pins are 2 and 3? I DON'T want to get this wrong now... Thanks. Matt - K7OE ___ 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] kpa800 question
Let us look at the matter in a different way. The skill required in the construction a real QRO solid state power amplifer is different. KPA800 will be an entire different training for myself as a non-radio profession. Cheers, Johnny Siu VR2XMC - Original Message - From: EricJ [EMAIL PROTECTED] To: 'Mike Harris' [EMAIL PROTECTED]; Elecraft@mailman.qth.net Sent: Thursday, May 26, 2005 9:03 AM Subject: RE: [Elecraft] kpa800 question My electric bill came today and it worked out to 11.7 cents/kwh. I suppose I could then afford to run a kw, but as you say, a bunch of aluminum up high (TH7DX @ 65') works both ways. With a linear, you pay so that the guy at the other end has an easier time of it! It's not going to be on my Christmas List to Santa this year, but I think it will be good for the Elecraft brand name, and that eventually helps us all. Eric KE6US ___ 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] A New Kit on the Block
4933 has been inventoried, only a couple parts MIA no biggie. I can't wait to put the kit together. I am overwhelmed by the vastness of the kit. I have only built 1 kit with through hole soldering solder joints on both sides of the board the kit was a M3 semiconductor tester and that was a breeze to assemble. also I am looking for a L\C meter that sells for 100.00 via kit it has a tan case with pigtail leads or a 2 pin breadboard style test points. TU Dave AB8TN ___ 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] antenna suggestions? (was Re: kpa800 question)
On Wed, 2005-25-05 at 17:04 -0700, David Toepfer wrote: I agree, but, some of us have no room/permission for an antenna that is worth anything, and have to make up for it somehow. You've got it good! Right now I've got no antenna at all. I'm away from home for about 15 months, living in an 11x15 foot room. It's basically the equivalent of a small hotel room. It's on the 3rd floor and has a window, but no balcony. It's probably not a great idea to string wire out the window (it's military barracks). I should be able to get away with attaching stuff to the walls. So - any antenna suggestions? Preferably something inexpensive and easy to build as I have almost no tools here. Some ideas I've been thinking about are a random wire (using the tuner), a homebrew buddipole, perhaps a magnetic loop to stick by the window, or a shortened vertical. The rig is a K2/100, and I do have a MFJ tuner if I need it. All suggestions gratefully accepted! -- 73, Brian VE7NGR ___ 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] kpa800 question
Training for what? You're only going to do it once! Eric KE6US -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JS Sent: Wednesday, May 25, 2005 6:39 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] kpa800 question Let us look at the matter in a different way. The skill required in the construction a real QRO solid state power amplifer is different. KPA800 will be an entire different training for myself as a non-radio profession. Cheers, Johnny Siu VR2XMC ___ 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] kpa800 question
The construction technique and tuning procedures would be different from K2. It should be an interesting construction experience. 73 Johnny Siu VR2XMC s/n 1146, 4165, 3837, 4255, 4597 - Original Message - From: EricJ [EMAIL PROTECTED] To: 'JS' [EMAIL PROTECTED]; Elecraft@mailman.qth.net Sent: Thursday, May 26, 2005 10:07 AM Subject: RE: [Elecraft] kpa800 question Training for what? You're only going to do it once! Eric KE6US -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JS Sent: Wednesday, May 25, 2005 6:39 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] kpa800 question Let us look at the matter in a different way. The skill required in the construction a real QRO solid state power amplifer is different. KPA800 will be an entire different training for myself as a non-radio profession. Cheers, Johnny Siu VR2XMC ___ 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] Transverter for 70cm?
Hi George, I suppose you mean specifically an Elecraft transverter. I've used the Down East Microwave transverters in the past and they worked great. Were also lots of fun to assemble. Taught me that SMD are not so bad (the density was quite low). You can find them at www.downeastmicrowave.com. Standard disclaimers apply, such as I have no affiliation with DEM. I'm just offering an alternative. A higher priced (and I believe non-kit) version from SSB Electronics for a fine German manufactured transverter may also be of interest, but be prepared for the price! BTW, I think DEM plugs Elecraft as well and offers tips on interfacing Elecraft with their transverters. I first heard about Elecraft while going throught he DEM website. I thought who the heck is Elecraft, never heard of them but eventually I figured it out! Mark, NK8Q K2 4786 George Cortez wrote: Is there a possibility of one for 70cm would love one! George NE2I ___ 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] MH2 Microphone Discontinued
The MH2 is now listed as discontinued. Will there be an Elecraft-branded replacement for those who don't fancy pop star type microphones? 73 Paul ZL3IN ___ 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] kpa800 question
Definitely. It should be fun. And when you let the smoke out, you REALLY let the smoke out. Hi. 73, Johnny Eric KE6US -Original Message- From: JS [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 25, 2005 7:16 PM To: EricJ; Elecraft@mailman.qth.net Subject: Re: [Elecraft] kpa800 question The construction technique and tuning procedures would be different from K2. It should be an interesting construction experience. 73 Johnny Siu VR2XMC s/n 1146, 4165, 3837, 4255, 4597 - Original Message - From: EricJ [EMAIL PROTECTED] To: 'JS' [EMAIL PROTECTED]; Elecraft@mailman.qth.net Sent: Thursday, May 26, 2005 10:07 AM Subject: RE: [Elecraft] kpa800 question Training for what? You're only going to do it once! Eric KE6US -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of JS Sent: Wednesday, May 25, 2005 6:39 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] kpa800 question Let us look at the matter in a different way. The skill required in the construction a real QRO solid state power amplifer is different. KPA800 will be an entire different training for myself as a non-radio profession. Cheers, Johnny Siu VR2XMC ___ 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] Installing C56 on Pins 2 and 3 of K1
Matt, If you look at Fig 13 on page 34, you will see a 'solder blob' just above the letters 'CB' - the next two 'blobs' to the right of that are pins 2 3. If you download the pdf version of the manual,you can word search and 'expand' the illustrations to make them VERY clear... Hope this helps.. Dave KK7SS I need a little assistance from other KX1 builders out there. The manual states to solder the capacitor C56 between pins 2 and 3 of the relay K1 (page 34, right side, second step). How do I determine which pins are 2 and 3? I DON'T want to get this wrong now... Thanks. Matt - K7OE ___ 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] What I forgot to ask at Dayton...
Great idea! Elecraft could donate the proceeds to a charity. It would be a win-win, they get good press, the charity gets a nice contribution and someone gets K2 #5000. Tom WB2QDG k2 1103 - Original Message - From: Ken Bessler [EMAIL PROTECTED] To: Elecraft Main Group elecraft@mailman.qth.net Sent: Wednesday, May 25, 2005 1:46 PM Subject: Re: [Elecraft] What I forgot to ask at Dayton... - Original Message - From: Tom Bosscher [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Wednesday, May 25, 2005 1:34 PM Subject: [Elecraft] What I forgot to ask at Dayton... And that is, who has, or who is going to get K2 SN # 5,000 ? Maybe Eric and Wayne should have had a raffle for it! tom bosscher K8TB K2 SN 3206 Motion seconded! Maybe $20 a piece? Sell 25 tickets and you break even but I'll bet WAY more than 25 tickets get sold! I'd buy 5 myself. Ken -- Just my 2¢ worth... 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #1055, Digital On Six #350, Proud builder owner of Elecraft K2 #4913 -- Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.16 - Release Date: 5/24/2005 ___ 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] What I forgot to ask at Dayton...
SN 5000 should have Wayne and Eric's signatures engraved on the top cover - or maybe that would be a good idea for a 10th anniversary special edition K2? 73 de Larry W2LJ ___ 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] Installing C56 on Pins 2 and 3 of K1
Matt - K7OE - asked: I need a little assistance from other KX1 builders out there. The manual states to solder the capacitor C56 between pins 2 and 3 of the relay K1 (page 34, right side, second step). How do I determine which pins are 2 and 3? I DON'T want to get this wrong now... -- Figure 13 just below that step in the manual shows C56 in place on the center two pins (2 and 3) on the side closest to the trimmers (or where the trimmers will go). My apologies for the illustration showing parts that haven't been installed yet. C56 was added AFTER I did the build and took the pictures. Ron AC7AC ___ 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] antenna suggestions? (was Re: kpa800 question)
Brian, VE7NGR, asked: ...Right now I've got no antenna at all. I'm away from home for about 15 months, living in an 11x15 foot room. It's basically the equivalent of a small hotel room. It's on the 3rd floor and has a window, but no balcony. It's probably not a great idea to string wire out the window (it's military barracks). I should be able to get away with attaching stuff to the walls. So - any antenna suggestions? Preferably something inexpensive and easy to build as I have almost no tools here. Some ideas I've been thinking about are a random wire (using the tuner), a homebrew buddipole, perhaps a magnetic loop to stick by the window, or a shortened vertical. The rig is a K2/100, and I do have a MFJ tuner if I need it. All suggestions gratefully accepted! - Are you by chance in a wooden barracks building such as I recall lo' these many years ago? Or in one of those modern monoliths of military might made from concrete and steel? If wood, I'd suggest ignoring the building itself. It won't do the RF much harm. I'd go for a balanced (or sorta balanced) situation. Run two wires up the wall from the ATU to the ceiling. Make them about 2 or 3 inches apart. That's your balanced line. When you get to the ceiling (or rafters, depending upon whether you have a finished ceiling, the wires go opposite directions around the room until the almost meet opposite the feed line. Keep them several inches apart at least and insulate those ends! (They'll be very hot with RF and you don't want to promote excessive losses). Small bits of plastic will do, or just use some plastic monofilament fishing line for the last few inches to a push-pin holder. Staples, pushpins, whatever you have handy are good for holding my wire. My favorite are push-pins with a loop of antenna wire around each pin. You can use the balun in your MFJ for balanced feed but it'll probably work as well (or better!) if you simply hook one side of the feeder to the tuner case and the other side to the single wire feed terminal (or the coax center pin, which will take a banana plug FB). Ignoring the balun might be better than trying for balanced feed because under many conditions those baluns can be very, very lossy! IF it's a concrete/steel building, that same system might work well too, but the concrete/steel might show high losses too. I'd try to get outdoors with the radiating half at least. Perhaps something out the window. Hang a wire down toward the ground that you can pull up and stow when you're not operating. Put a weight on the end so it'll hang straight and try not to bonk the C.O. on the head with the thing. Run a wire along the floor for your ground. A 1/4 wave wire for each band is best. You can put 'em on the wall or around the baseboard, etc. Ron AC7AC ___ 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
