Re: [Elecraft] Japanese speaking KPA-500 owners?
On 11/12/2020 1:42 PM, weave...@usermail.com wrote: I have a friend that is not confident with his English skills that is thinking about purchasing a KPA-500. Elecraft production engineer Bob Wolbert, K6XX, has long been married to a Japanese woman, and speaks Japanese, although I don't know how fluently. He was responsible for putting both power amps into production. His adult daughters have spent a lot of time in Japan, and I think one lives there. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Procedure for setting Bias on K3 LPA FETS
Thanks for all the replies !! I appreciate it from everyone,, 73's Tom N7GP ex Wa8WZG On 2020-11-12 19:48, wa8...@wa8wzg.net wrote: To All... I have had to replace the 2 FET's Q4 and Q5 on the LPA,,,'I cant not find the info on setting the Bias..on these devices,, Can some one point me in the right direction... Thanks again!! Tom N7GP EX WA8WZG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to wa8...@wa8wzg.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Japanese speaking KPA-500 owners?
Hello Bill, Your friend may contact to Electro Design Corporation which is the import agent of Elecraft products and providing optional support services in Japanese. Japanese users who are not confident with their English skill usually buy Elecraft products through the company. 73 de JH3SIF, Keith > 2020/11/13 6:42、weave...@usermail.comのメール: > > I have a friend that is not confident with his English skills that is > thinking about purchasing a KPA-500. Are there any Japanese speaking KPA-500 > owners on the list that he can bounce questions off of? > > thanks and 73, > Bill WE5P > > Comfortably Numb > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to jh3...@sumaq.jp __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Sony MDR-7506 replacement pads?
All of these MDR-7506 posts reminded me that I purchased OEM pads for my Sony MDR-7506 many months ago but I never installed them. I had some free time this evening and I was still able to find the ear pads in my "stuff" so I thought I would give it a try. It was quite easy to remove the original pads. To install the new ones I started at the top (not the side) and did not push the material very far into the lip. I worked my way to the bottom holding the pad lip in place along the sides. When it was completely around I used a thin machinists scale to push the pad into the groove in areas where it was not seated properly. It was a little time consuming but not really difficult and now the headphones look new again. These are my favorite headphones! John KK9A Frank O'Donnell K6FOD: Is there a secret trick for getting replacement earpads installed smoothly onto the headphones? I bought a pair of Sony pads for my MDR-7506, but try as I might, as I get one side into the groove on the headphone, the other side inevitably slips out. Beginning to get into the realm of the comical. Frank K6FOD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Procedure for setting Bias on K3 LPA FETS
Tom, The procedure below is what I received from Elecraft Tech support back in July of 2019. It worked for me after changing the LPA FETs in my K3. 73, Scott AD5HS === You'll need this sequence for setting bias after the fix: *Here is the procedure to check if your LPA module has been adjusted properly for bias current:* (current increases approx. 600 ma when XMIT is tapped (below 12W). 1. Remove the 100 watt amplifier (if installed) by disconnecting the fan panel and their 2 connector wires, and the 2 wires to the circuit breaker. Use care to not pull on the KPA3 too hard and thus let it fly off the connectors and cause damage to it or to the chassis. Use gentle but firm finger pressure, or pry carefully with a plastic tool (such as the K2 green plastic alignment tool), near the two PCB connectors. This will usually help the KPA3 start to move. 2. Locate small SMD pots R18, R19 and R24 near the center of the LPA board. Turn the pots to minimum. (White pots fully CW, Black pots fully CCW) 3. Turn the power knob down to ZERO. 4. Tap DISP, (display button), use VFO B to display the current drawn by the radio. For more accurate results, insert a DMM in the positive power supply lead that is set to a current range that can handle up to 2-3 amps. 5. Hold TEST (the right hand side of the MODE button). This puts the K3 in TEST mode with no RF drive. 6. Tap XMIT. You will see a current of approx 1 to 2A (depending on options in radio) but the red TX LED will not come on. Adjust R18 to increase the reading by 0.2A IE 200ma 7. Adjust R19 to increase the current another 0.2A 8. Adjust R24 to increase the current another 0.2A 9. Tap XMIT to exit bias on condition. (Current should drop approx. 600ma). NOTE: if you are just checking current and you do have the KPA3 installed, set it to NOT INST and cycle power so you do not have its current added, thus confusing your readings. 10. Set Power to 11.9W. Hold TEST again to cancel TEST mode so RF output is possible. The LCD shows TX NORM. 11. With PWR SET to “nor” Hold TUNE and see how much power you get on all bands. Elecraft Customer Support supp...@elecraft.com 831-763-4211 = On 11/12/2020 1:48 PM, wa8...@wa8wzg.net wrote: To All... I have had to replace the 2 FET's Q4 and Q5 on the LPA,,,'I cant not find the info on setting the Bias..on these devices,, Can some one point me in the right direction... Thanks again!! Tom N7GP EX WA8WZG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to netbs...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3 transverter connector question
Good day. I am considering recrystalling my 2m transverter with a 118MHz rock replacing the existing 116MHz crystal, thereby permitting full two metre band coverage with a 26-30MHz I/F. Does the K3 need to be widebanded to enable low-level 26-28MHz RF on the transverter transmit port or is the low-level output available by default? -- Chris Cox, N0UK, G4JEC chr...@chris.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Japanese speaking KPA-500 owners?
I have a friend that is not confident with his English skills that is thinking about purchasing a KPA-500. Are there any Japanese speaking KPA-500 owners on the list that he can bounce questions off of? thanks and 73, Bill WE5P Comfortably Numb __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA500 Remote Power Switch
This might be a source https://www.digital-loggers.com/lpc.html Paul Gacek > On Nov 12, 2020, at 12:47 PM, K9MA wrote: > > A friend in Europe is setting up a K3 and KPA500 for remote operation. Does > anyone know of a suitable 240 V EU remote power switch? > > 73, > Scott K9MA > > -- > > Scott Ellington > > --- via iPad > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to paul.ga...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA500 Remote Power Switch
A friend in Europe is setting up a K3 and KPA500 for remote operation. Does anyone know of a suitable 240 V EU remote power switch? 73, Scott K9MA -- Scott Ellington --- via iPad __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Procedure for setting Bias on K3 LPA FETS
To All... I have had to replace the 2 FET's Q4 and Q5 on the LPA,,,'I cant not find the info on setting the Bias..on these devices,, Can some one point me in the right direction... Thanks again!! Tom N7GP EX WA8WZG __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT question about receiving loop antenna
May I suggest checking all your PSUs. I had the same issue once and it turned out to be the PSU running a tuner. I binned the PSU and installed a tried and tested new one. No more issues. 73, Alan. G4GNX -- Original Message -- From: "Victor Rosenthal" To: "Elecraft Reflector" Sent: 12/11/2020 14:16:53 Subject: [Elecraft] OT question about receiving loop antenna I have an RF Pro 1b receiving loop antenna which I use for diversity reception on my K3. It used to be sold by Pixel Technologies, and now it is handled by DX Engineering. If there is someone else who has this same antenna, please contact me off list. My antenna seems to be producing a strong (-50 dBm) spurious signal that starts around 7400 kHz and drifts down. It is frequency modulated at the line frequency. I have replaced the preamp and I still have the problem. I am pretty certain that it is not an external signal, but I would like someone else to check theirs for the same issue as a sanity check. -- 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to g4...@g4gnx.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] OT question about receiving loop antenna
I have an RF Pro 1b receiving loop antenna which I use for diversity reception on my K3. It used to be sold by Pixel Technologies, and now it is handled by DX Engineering. If there is someone else who has this same antenna, please contact me off list. My antenna seems to be producing a strong (-50 dBm) spurious signal that starts around 7400 kHz and drifts down. It is frequency modulated at the line frequency. I have replaced the preamp and I still have the problem. I am pretty certain that it is not an external signal, but I would like someone else to check theirs for the same issue as a sanity check. -- 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
