Re: [Elecraft] K2 - no TX power problem -- D36 WANTED in Germany!!!
Hi Gerhard, The IN4007 is available worldwide, so should be available in Germany. In the UK they are widely retailed at 6 to 15 cents in Euros. Not come across the UF4007 before though possibly a Seimens or similar branding of the same item? The correct item for D36 I believe is HP PIN diode 5082-3081. These are more difficult to source in the UK, though I have bought HP diodes in the past from Mainline Electronics at Leicester. They list another surface mounted PIN diode type HSMP-3810 as being similar. The item I received with my K2 kit in May appeared to be marked 338 3081. Possibly better to cut your losses and order a replacement direct from Elecraft which could normally be delivered to you within 7 days by airmail. An e-mail to Scott at Elecraft should give you the prompt answer on cost. Regards, Bob, G3VVT K2 #4168 ___ 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 - no TX power problem -- D36 WANTED in Germany!!!
Hi, thanks for recommending another Diode. The vendor suggested to use UF4007 instead of 1N4007 maybe. What do you think? Of course it's hard to get the D36 here in Germany. Any idea, German readers??? I think of getting it at - HAM Radio, - QRP-Projekt - or Elecraft 73 Gerhard --- Don Wilhelm <[EMAIL PROTECTED]> schrieb: > Gerhardt, > > Yes, I too would believe D36 is broken - it is quite > fragile and will crack > if the leads are bent too close to the glass body - > HANDLE WITH CARE. > > You can temporarily substitute a 1N4007 diode until > you can obtain a > replacement (the 1N4007 was used in the D36 location > until the keying > waveshape change was implemented). You can likely > find a 1N4007 easier than > the proper PIN diode. > > With the 1N4007 in D36, your keying waveshape may > not be exactly correct (it > will be close enough), and it should get you through > the testing of your K2. > > > 73, > Don W3FPR > > Life is what happens when you are making other plans > > ___ Bestellen Sie Y! DSL und erhalten Sie die AVM "FritzBox SL" für 0. Sie sparen 119 und bekommen 2 Monate Grundgebührbefreiung. http://de.adsl.yahoo.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] K2 - no TX power problem
It seems that I have a TX problem too. Just to prevent removing D36 for nothing because it's fragile, could someone give a result that I should read on my DMM when D36 is working properly ??? Le 04-06-24, à 13:59, Don Wilhelm a écrit : Gerhardt, Yes, I too would believe D36 is broken - it is quite fragile and will crack if the leads are bent too close to the glass body - HANDLE WITH CARE. You can temporarily substitute a 1N4007 diode until you can obtain a replacement (the 1N4007 was used in the D36 location until the keying waveshape change was implemented). You can likely find a 1N4007 easier than the proper PIN diode. With the 1N4007 in D36, your keying waveshape may not be exactly correct (it will be close enough), and it should get you through the testing of your K2. 73, Don W3FPR Life is what happens when you are making other plans - Original Message - At TP2 on transmit I get a nice signal on my oscilloscope, abt 0.005 Vrms But behind TP2 the signal vanishes. All measurements are way too low, if present at all. At U10 Pin 4 there's only a short Jump to 5V and immediately back to 0 on keying. No HF detectable. I unsoldered the Diode D36 and checked for resistance. Infinite in both directions. Does this mean what I think? This D is broken? ___ 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 === Jean-François Ménard / VA2VYZ [EMAIL PROTECTED] Club d'Astronomie Amateur de Sherbrooke Club Radio Amateur de l'Estrie Mon site web personnel : http://homepage.mac.com/jfmenard === ___ 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 - no TX power problem
Gerhardt, Yes, I too would believe D36 is broken - it is quite fragile and will crack if the leads are bent too close to the glass body - HANDLE WITH CARE. You can temporarily substitute a 1N4007 diode until you can obtain a replacement (the 1N4007 was used in the D36 location until the keying waveshape change was implemented). You can likely find a 1N4007 easier than the proper PIN diode. With the 1N4007 in D36, your keying waveshape may not be exactly correct (it will be close enough), and it should get you through the testing of your K2. 73, Don W3FPR Life is what happens when you are making other plans - Original Message - At TP2 on transmit I get a nice signal on my oscilloscope, abt 0.005 Vrms But behind TP2 the signal vanishes. All measurements are way too low, if present at all. At U10 Pin 4 there's only a short Jump to 5V and immediately back to 0 on keying. No HF detectable. I unsoldered the Diode D36 and checked for resistance. Infinite in both directions. Does this mean what I think? This D is broken? ___ 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] K2 - no TX power problem
Hi, I have a problem: No TX Out on my freshly assembled K2. f = 7100 Vpwr = 5V Valc = 7,5V Power reading on LCD = 0.2W (desired 5W) Power consumption 440mA on 12,4V At TP2 on transmit I get a nice signal on my oscilloscope, abt 0.005 Vrms But behind TP2 the signal vanishes. All measurements are way too low, if present at all. At U10 Pin 4 there's only a short Jump to 5V and immediately back to 0 on keying. No HF detectable. I unsoldered the Diode D36 and checked for resistance. Infinite in both directions. Does this mean what I think? This D is broken? Do you need any more information? What else could I check? Thanks for any advice in advance! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ 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
