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1. [Amps] ICOM PRO III QSK (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Wed, 7 Dec 2011 11:12:22 -0800 (PST); Hi all, Does anyone know it the timing on the ICOM PRO III linear amplifier SEND line is such that the AMP will not be hot switched on FULL BREAK IN? I have an old Alpha 76 and can install vacuum; /archives//html/Amps/2011-12/msg00067.html (7,288 bytes)
2. [Amps] PRO III and ALpha 76 (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Fri, 9 Dec 2011 20:06:26 -0800 (PST); Thanks to all and the links. After looking thru all the stuff, this is my take on things. BTW I use a computer and Rig Blaster PRO to key the PRO III and do FSK RTTY with the ACC jacks. My AL-80B w; /archives//html/Amps/2011-12/msg00085.html (7,886 bytes)
3. [Amps] Alpha 78 QSK board photos and question (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Thu, 22 Dec 2011 08:25:25 -0800 (PST); Hi all, Anyone have close up photos of the Alpha 78 QSK board they could send me off list? I am reverse engineering it for my old Alpha 76. The ones in the manual aren't much help. Also, the sche; /archives//html/Amps/2011-12/msg00189.html (7,047 bytes)
4. [Amps] Alpha low drive mod resistors (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Wed, 28 Dec 2011 11:46:56 -0800 (PST); Doing a low drive mod on Alpha 76CA. Saw five 470 ohm 2W composition carbon as recommended, hard to find. Will modern carbon film or metal film resistors work or are the inductive enough to screw t; /archives//html/Amps/2011-12/msg00245.html (6,844 bytes)
5. [Amps] Alpha 76CA low drive answered - now for the plate choke (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Thu, 29 Dec 2011 09:33:24 -0800 (PST); Thanks to all...... five 470 ohm 2 watt carbon films installed. Special thanks to Bob W6VY for sending me the Alpha instructions. Without them I would not have know to change the jumpers. Turns out w; /archives//html/Amps/2011-12/msg00265.html (7,816 bytes)
6. [Amps] FS: Krohn-Hite Amplifier DCA-50 $100 OBO, pick up....shipping extra (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Tue, 3 Jan 2012 20:43:54 -0800 (PST); DC to 500 kHz 50 watt rating amplifier, if you are looking you know what they can do. This thing weighs a ton and has two huge power transformers, fan, 4-6DQ5's and 4-6AS7s and some other small tubes; /archives//html/Amps/2012-01/msg00039.html (8,064 bytes)
7. [Amps] 15 uh chokes (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Sun, 8 Jan 2012 19:00:01 -0800 (PST); Hi all, Alpha shows 15uh chokes in several places in the 78 and after the plate choke in the 76. The choke in my 76 is about 1/4" dia and 3/8"long and has at most 30 turns. It appears to be a sim; /archives//html/Amps/2012-01/msg00115.html (7,466 bytes)
8. [Amps] Coax question (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Mon, 9 Jan 2012 19:38:34 -0800 (PST); Hi all, My Alpha has some unmarked short coax from the PI network to the relays I'm replacing with Gigavacs. I need some small coax and have RG-122 that I think will work for the input side. An; /archives//html/Amps/2012-01/msg00116.html (6,742 bytes)
9. [Amps] Grid Overcurrent Protection - Alpha 78 QSK (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Sat, 14 Jan 2012 09:32:43 -0800 (PST); HI, I have seen Bob K6XX's article on Grid Overcurrent Protection (and SWR) for an Alpha 76. Any advice/articles on Grid Overcurrent Protection for a QSK Alpha 78? I'm about 70% complete conver; /archives//html/Amps/2012-01/msg00145.html (7,342 bytes)
10. [Amps] Alpha 78 PRO III RigBlaster SteppIR interconnections (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Wed, 18 Jan 2012 12:16:47 -0800 (PST); Hi all, please respond off list if you can help. My current station has a computer with N1MM and digital programs that run thru the RigBlaster and key the PRO III key line/PTT and FSK rtty connecti; /archives//html/Amps/2012-01/msg00152.html (8,425 bytes)
11. [Amps] Ameritron Plate Choke (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Mon, 23 Jan 2012 19:24:05 -0800 (PST); The new one I got for my Alpha 76 apparently is self resonant around 10 mHZ :-) Any ideas on rewinds that work on all bands 1.8 - 30 mhz? Rick, N6PE == Talk is cheap... except when Congress does it.; /archives//html/Amps/2012-01/msg00175.html (6,588 bytes)
12. [Amps] Ameritron Choke Update (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Tue, 24 Jan 2012 20:28:03 -0800 (PST); Looks like the choke was fine but limited space in the Alpha got it too close to the load capacitor and the bottom of the center winding arced to it. Rick, N6PE == Talk is cheap... except when Congre; /archives//html/Amps/2012-01/msg00180.html (6,573 bytes)
13. [Amps] Eimac 8874 / 3CX400A7 (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Tue, 7 Feb 2012 09:02:16 -0800 (PST); Anyone have any setting ideas for a Hickok 600 or old diode type tube tester to check these puppies? TNX, Rick, N6PE ZUT == Talk is cheap... except when Congress does it. __________________________; /archives//html/Amps/2012-02/msg00054.html (7,029 bytes)
14. [Amps] Grid current protection HELP (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Mon, 13 Feb 2012 16:59:07 -0800 (PST); Hi all, A while back K6XX published an article that can be found at members.cruzio.com/~k6xx/radio/76a_prot.pdf It is a simple opticoupler that triggers a 555 timer base on the voltage drop across a; /archives//html/Amps/2012-02/msg00131.html (7,761 bytes)
15. [Amps] K6XX resolved (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Tue, 14 Feb 2012 15:57:45 -0800 (PST); Connected pin 2 to the collector on the opticoupler (tnx Al AB2ZY )and all seems to work on the bench. Anything over about 1 volt trips the 555 high and it bleeds off in about 5 secs, which is what I; /archives//html/Amps/2012-02/msg00167.html (7,135 bytes)
16. [Amps] HT-41 (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Mon, 19 Mar 2012 20:29:23 -0700 (PDT); A friend has one of these with the mercury rectifiers replaced with diodes and a new capacitor pack. He also thinks the 7094s are now 813s. It has been sitting unsed for years. Any recommendations; /archives//html/Amps/2012-03/msg00210.html (6,780 bytes)
17. [Amps] Teflon Tape (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Tue, 27 Mar 2012 17:23:43 -0700 (PDT); Anyone tried wrapping a plate choke with plumbers teflon tape? Wonder if it has a good BDV and does not effect the choke resonance? Rick, N6PE == Talk is cheap... except when Congress does it. ___; /archives//html/Amps/2012-03/msg00281.html (6,578 bytes)
18. [Amps] Plate choke help. (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Tue, 10 Apr 2012 17:48:59 -0700 (PDT); Hi all, I replaced the plate choke in an Alpha 76 with an Ameritron that is much bigger. First time out it arced to the nut on the back of the load cap. This is an older 76 with the long cap so the; /archives//html/Amps/2012-04/msg00094.html (8,033 bytes)
19. [Amps] Slightly off topic (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Sat, 14 Apr 2012 15:34:10 -0700 (PDT); Anyone had any problems with the new solid state computer drives? Blowing them away with RF or RFI ??? Rick, N6PE == Talk is cheap... except when Congress does it. __________________________________; /archives//html/Amps/2012-04/msg00141.html (6,371 bytes)
20. [Amps] Dummy can (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Fri, 15 Jun 2012 13:04:25 -0700 (PDT); I remember when Heathkit recalled their PCB oil dummy loads and recommended I fill it with mineral oil. Seemed to work OK with my DX-20 hi hi Rick, N6PE == Talk is cheap... except when Congress does; /archives//html/Amps/2012-06/msg00158.html (6,542 bytes)

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