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21. [AMPS] Building AMP with four valves in parallel (4-250) -anyguidance ? (score: 1): Author: ve3tu@rac.ca (Steve); Date: Sat, 09 Dec 2000 14:15:46 +0000; Like Phil sez,. pay particular attention to the tank cct. This is a good reason to use a vacuum variable for the tune c. The rf feed capacitor from the tube to the tank should be robust and be able t; /archives//html/Amps/2000-12/msg00149.html (11,423 bytes)
22. [AMPS] AM on Titan II (score: 1): Author: ve3tu@rac.ca (Steve); Date: Thu, 28 Dec 2000 04:45:32 +0000; Hi Ken, the thing with AM is that the peak power is four times the carrier power. You should have a good peak reading watt meter to adjust the excitor and the amp to run properly on AM. I use the 2 w; /archives//html/Amps/2000-12/msg00329.html (7,834 bytes)
23. [AMPS] Glitch protection (score: 1): Author: ve3tu@rac.ca (Steve); Date: Fri, 03 Nov 2000 04:50:40 +0000; Hello Paul and Abbi, I built an 8877 amp and put in a high voltage fuse and a 50 ohm resistor on the B+ line. The fuse popped a couple of times when the tube was first used but settled down after tha; /archives//html/Amps/2000-11/msg00035.html (10,621 bytes)
24. [AMPS] 3CX 800 A7 (score: 1): Author: ve3tu@rac.ca (Steve); Date: Mon, 20 Nov 2000 18:35:26 +0000; --E22F946F35EABD2C772DC3D1 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hi Jon, just pull the plate connector off each tube to find the defective one. Just remember to p; /archives//html/Amps/2000-11/msg00241.html (9,928 bytes)
25. [AMPS] Hi Power Connectors (score: 1): Author: ve3tu@rac.ca (Steve); Date: Tue, 21 Nov 2000 04:38:26 +0000; The only thing going for PL259 type connectors is they are cheap and readily available. The most common failure of connectors (PL259 or N) is mechanical or from water ingress. I would not hesitate to; /archives//html/Amps/2000-11/msg00246.html (10,114 bytes)
26. [AMPS] Hi Power Connectors (score: 1): Author: ve3tu@rac.ca (Steve); Date: Wed, 22 Nov 2000 03:20:13 +0000; Like Tom says, anyone that hasn't blown an N connector hasn't run high power through them for a long period of time. The typical failure of N connectors is from the heat generated at the junction of; /archives//html/Amps/2000-11/msg00277.html (11,447 bytes)
27. [AMPS] Bird meters (score: 1): Author: ve3tu@rac.ca (Steve); Date: Mon, 09 Oct 2000 08:52:04 -0400; Hello Peter, an easy way to slit the brass tube is to use a Dremel tool with a fiber reinforced cut off blade. Put a rod or another piece of tube inside the 1/8 tube and clamp it in a vise length wis; /archives//html/Amps/2000-10/msg00140.html (9,510 bytes)
28. [AMPS] Bird meters (score: 1): Author: ve3tu@rac.ca (Steve); Date: Mon, 09 Oct 2000 10:15:42 -0400; Hi Peter, a Dremel tool is a small hand held die grinder that powered off the mains. It has a 1/8" collet to hold different cutting tools. The cut-off disc is 2" in diameter and about 1/64" thick. It; /archives//html/Amps/2000-10/msg00144.html (9,472 bytes)
29. [AMPS] High-SWR protection (score: 1): Author: ve3tu@rac.ca (Steve); Date: Tue, 31 Oct 2000 14:32:31 +0000; Hello Colin and all on the reflector, I would like to know what a directional coupler would indicate if there was reactance and resistance on the load for example 35R with -35J . The vector sum is 50; /archives//html/Amps/2000-10/msg00706.html (8,721 bytes)
30. [AMPS] HF 1250 (score: 1): Author: ve3tu@rac.ca (Steve); Date: Mon, 04 Sep 2000 19:45:34 -0400; Hi all,. I am wondering if anyone has a Commander HF 1250 that you would care to part with (sell), please reply direct to save bandwidth. Thanks Steve VE3TU I posted this message before and judging b; /archives//html/Amps/2000-09/msg00085.html (6,451 bytes)
31. [AMPS] Blown TL922A... What to do? (score: 1): Author: ve3tu@rac.ca (Steve); Date: Fri, 08 Sep 2000 01:34:11 -0400; I have to agree with George, this great debate does not seem to me to be advancing the state of the art. I can just picture it, a group standing by a tomb stone which reads "WATCH OUT FOR THE PARASIT; /archives//html/Amps/2000-09/msg00269.html (10,946 bytes)
32. [AMPS] Blown TL922A... What to do? (score: 1): Author: ve3tu@rac.ca (Steve); Date: Sun, 10 Sep 2000 20:15:29 -0400; Hi Tom and all on the amp reflector, I was wondering if the tests you did with the 8877 tube checking for grid to cathode shorts was done with a hard start or soft start filament supply, and did you; /archives//html/Amps/2000-09/msg00425.html (9,081 bytes)
33. [AMPS] AL-80B Amps (score: 1): Author: ve3tu@rac.ca (Steve); Date: Wed, 27 Sep 2000 06:52:27 -0400; It just boggles my mind the kind of comments we see popping up on the this reflector. I hope you have an elmer at the radio club and I hope your elmer has read the ARRL handbook. I think that reading; /archives//html/Amps/2000-09/msg01085.html (9,331 bytes)
34. [AMPS] AL-80B Amps (score: 1): Author: ve3tu@rac.ca (Steve); Date: Wed, 27 Sep 2000 21:40:57 -0400; In the original post Joe made a statement in regards to a dangerous situation with the AL-80b having the B+ on with the amp turned on. I failed to see to see where the dangerous situation could come; /archives//html/Amps/2000-09/msg01130.html (9,742 bytes)
35. [AMPS] HF 1250 (score: 1): Author: ve3tu@rac.ca (Steve); Date: Sun, 20 Aug 2000 23:48:01 -0400; Hi all,. I am wondering if anyone has a Commander HF 1250 that you would care to part with (sell), please reply direct to save bandwidth. Thanks Steve VE3TU -- FAQ on WWW: http://www.contesting.com/F; /archives//html/Amps/2000-08/msg00390.html (6,307 bytes)
36. [AMPS] tube info (score: 1): Author: ve3tu@rac.ca (Steve); Date: Mon, 28 Aug 2000 19:58:51 -0400; Hi all, any one have info on these tubes 8295A - PL172 or can point to a web address for specs on these tubes. Thanks Steve VE3TU -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@c; /archives//html/Amps/2000-08/msg00468.html (6,468 bytes)
37. [AMPS] tube info (score: 1): Author: ve3tu@rac.ca (Steve); Date: Tue, 29 Aug 2000 13:55:13 -0400; Thanks for all the responses, we now have the info. tu es 73 Steve VE3TU -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@conte; /archives//html/Amps/2000-08/msg00493.html (6,420 bytes)
38. Re: [Amps] Alpha vs commander? (score: 1): Author: Steve <ve3tu@rac.ca>; Date: Wed, 03 Dec 2003 02:04:01 +0000; Hi Joel, I am not familiar with the 374A but I have a couple of 1250s and a 2500. The 1250 puts out 1500 watts on most bands, needs very low drive and has the WARC bands and Pat has good support but; /archives//html/Amps/2003-12/msg00028.html (6,946 bytes)
39. [Amps] one way coupler (score: 1): Author: Steve <ve3tu@rac.ca>; Date: Fri, 30 Jan 2004 14:02:28 +0000; I tried running two smaller (HF1250) amps each feeding one element of a phased vertical. One amp receives a lot of reflected power from the other element. I would like to know if there is a circuit t; /archives//html/Amps/2004-01/msg00360.html (6,625 bytes)
40. Re: [Amps] Switch-mode HV power supply (score: 1): Author: Steve <ve3tu@rac.ca>; Date: Tue, 16 Mar 2004 23:12:37 +0000; There are some high voltage RF fets on the market now that have low input capacitance and high gain at 30 Mc that are reasonably priced. This allows for an amp with no transformer in the supply to ru; /archives//html/Amps/2004-03/msg00179.html (8,719 bytes)

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