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1. [Amps] ALPHA 374, Nye Viking Tuner (score: 1): Author: K8MLM at aol.com (K8MLM@aol.com); Date: Mon Jul 21 07:51:25 2003; ETO Alpha 374 Bandpass Linear Amplifier. Serial number 3159. Rated at 2 kW PEP input. Three new 8874s, date code 9525, less than 10 hours on the tube filaments. Gets full rated output. $1300.00. Pref; /archives//html/Amps/2003-07/msg00110.html (6,751 bytes)
2. [Amps] ALPHA 374 FOR SALE (score: 1): Author: K8MLM at aol.com (K8MLM@aol.com); Date: Sun May 11 09:14:23 2003; I will be bringing the following to Dayton: ETO Alpha 374 Bandpass Linear Amplifier. Serial number 3159. Rated at 2 KW PEP input. Three new 8874s, date code 9525, less than 10 hours on the tube filam; /archives//html/Amps/2003-05/msg00094.html (6,664 bytes)
3. [Amps] Alpha 77 meter lamp replacement (score: 1): Author: K8MLM at aol.com (K8MLM@aol.com); Date: Fri Mar 7 16:45:27 2003; I replaced mine with a series string of LEDs (enough to add up to the 24 vdc... what ever color you want) on the top of the meter inside behind the front panel. You will never need to replace them an; /archives//html/Amps/2003-03/msg00312.html (6,780 bytes)
4. [Amps] Eimac 3-1000z Tubes (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Thu, 10 Oct 2002 12:39:12 -0400; I have a home brew 4-1000. About 10 years ago when I started testing, I plugged in a $1.00 hamfest tube I bought to use for a lamp base. The filament lit when voltage was applied, so I applied HV the; /archives//html/Amps/2002-10/msg00099.html (6,955 bytes)
5. [Amps] ALPHA 77 SX STATUS (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Fri, 20 Sep 2002 21:01:28 EDT; I got the ALPHA 77 SX up and running. Problems were: Both tube filaments burnt out, electronic bias was not working properly, and warm-up timer running too fast. The fix; two new tubes, removed a num; /archives//html/Amps/2002-09/msg00158.html (6,851 bytes)
6. [Amps] ALPHA 77 (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Sat, 3 Aug 2002 11:13:45 EDT; AMPS I have just acquired the two 8877 Alpha 77 SX. It worked the first time I tried it (output to dummy load easily over 1.5 KW with less than 100 watts input) (made several contacts on 40 M with go; /archives//html/Amps/2002-08/msg00042.html (8,668 bytes)
7. [Amps] ALPHA 77 SX UPDATE (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Tue, 20 Aug 2002 20:47:49 EDT; I finally really checked out the tubes on the ALPHA 77 SX. Initial ohm meter reading of filaments showed a very low resistance ... less than 2 ohms but something didn't seem right. Applied 5 vac fila; /archives//html/Amps/2002-08/msg00170.html (8,075 bytes)
8. [Amps] Which 3-500Z (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Wed, 28 Aug 2002 20:35:33 EDT; Phil, My ALPHA 77 has a measured filament voltage of 5.4 vac... too high. Definitely needs to be adjusted down. Bob; /archives//html/Amps/2002-08/msg00316.html (7,067 bytes)
9. [Amps] Re: [Amps} Transformer oil? (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Thu, 30 May 2002 12:15:06 -0400; If in doubt, the best way to get rid of transformer oil which has PCBs, or you think has PCBs, is to contact your local community hazardous materials branch / jurisdiction and request disposal instru; /archives//html/Amps/2002-05/msg00473.html (7,106 bytes)
10. [AMPS] care to take a guess..? Alpha problem (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Wed, 30 May 2001 13:57:51 EDT; I had the same symptoms with an Alpha 77SX... Low power. The problem was slipped chain drive and improperly indexed input and output band switches. A youngster thought they were neat cranks and crank; /archives//html/Amps/2001-05/msg00528.html (8,164 bytes)
11. [AMPS] AMPLIFIER LOADING (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Mon, 12 Jul 1999 18:09:21 EDT; When does maximum loading of an amplifier occur? Maximum C, when C-2 plates are meshed or Minimum C when C 2 plates are unmeshed? Thanks, Bob -- FAQ on WWW: http://www.contesting.com/ampfaq.html Subm; /archives//html/Amps/1999-07/msg00225.html (6,623 bytes)
12. [AMPS] filling holes in AL panel (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Mon, 21 Jun 1999 19:55:54 EDT; Auto Body Putty works great too. Sanded, primed and painted, you will never know the difference. Half my rack panels are done that way. Bob -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submis; /archives//html/Amps/1999-06/msg00566.html (7,206 bytes)
13. [AMPS] Parallel power transformers (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Sat, 7 Nov 1998 23:23:43 EST; << amps@contesting.com >> A better way to build a power supply from the transformers would, be to series the primary across 220 VAC and series the secondary, 1800-0-1800, to a full wave bridge rectif; /archives//html/Amps/1998-11/msg00110.html (7,240 bytes)
14. [AMPS] MAGNETIC RADIATORS (score: 1): Author: K8MLM@aol.com (K8MLM); Date: Sat, 9 May 1998 16:45:48 EDT; Does any one know where I can find more information on Magnetic Radiators. I have read the articles in the ARRL Antenna Compenduim II and IV, Magnetic Radiators-Lwo Profile Pared Verticals for HF, an; /archives//html/Amps/1998-05/msg00131.html (7,882 bytes)
15. [AMPS] MAGNETIC RADIATOR (score: 1): Author: K8MLM@aol.com (K8MLM); Date: Sat, 9 May 1998 21:26:56 EDT; Please disreguard my E-Mail on subject type antenna. I accidently applied the wrong address. I intended to send it to the Antenna Reflector. Sorry for taking up bandwidth. Bob -- FAQ on WWW: http://w; /archives//html/Amps/1998-05/msg00137.html (6,499 bytes)
16. [AMPS] 4-1000 IDLING CURRENT (score: 1): Author: K8MLM@aol.com (K8MLM); Date: Sat, 28 Mar 1998 20:16:13 EST; My Home brew 4-1000 amplifier works great except for on thing. The power out seems low. I believe it may have something to do with the low idling current. Plate voltage is 4,600 VDC and idling curren; /archives//html/Amps/1998-03/msg00472.html (8,188 bytes)
17. [AMPS] 4-1000 Screen Voltage (score: 1): Author: K8MLM@aol.com (K8MLM); Date: Sat, 13 Dec 1997 09:36:08 EST; I've heard that applying regulated 3-400 volts to the screen of a cathode driven 4-1000 in grounded grid will lower the drive requirements. Any comments? Thanks. Bob -- FAQ on WWW: http://www.contest; /archives//html/Amps/1997-12/msg00267.html (6,975 bytes)
18. [AMPS] Subj: 4-1000 Screen Voltage (score: 1): Author: K8MLM@aol.com (K8MLM); Date: Sat, 13 Dec 1997 16:53:09 EST; I've heard that applying regulated 3-400 volts to the screen of a cathode driven 4-1000 in grounded grid will lower the drive requirements. Any comments? Thanks. Bob -- FAQ on WWW: http://www.contest; /archives//html/Amps/1997-12/msg00278.html (6,562 bytes)
19. [AMPS] USE OF AUTO TRANSFORMER (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Sun, 16 Nov 1997 21:03:58 -0500 (EST); I have a home brew 4-1000 that requires more drive than my transceiver (100 watts) has to get full power out (it will only get 1000 watts out). The plate voltage is too low... about 3,800 volts. The; /archives//html/Amps/1997-11/msg00214.html (8,204 bytes)
20. [AMPS] 30S-1 FORSALE (score: 1): Author: K8MLM@aol.com (K8MLM@aol.com); Date: Sat, 22 Nov 1997 09:53:16 -0500 (EST); Collins 30S-1 Forsale. Just reciently brought back to life. New 4CX1000, gets 1000 watts + with 40-50 watts drive. 100% operational, cosmetic appearance not the greatest. Asking $1300.00 or best offe; /archives//html/Amps/1997-11/msg00315.html (6,930 bytes)

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