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1. [Amps] Dummy load and resistors (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Tue, 6 Jul 2010 18:21:17 +0700; Qty 44 2.2k resistors, each 2W. All in parallel. Submerged in 2 litres of oil (?). As an increase over the free air 88 watt rating what sort of dissipation can I reasonably expect? Continuously and f; /archives//html/Amps/2010-07/msg00058.html (6,502 bytes)
2. Re: [Amps] Salt water load (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Sat, 17 Jul 2010 12:30:30 +0700; This is my concern. I built a saltwater load in a 500gr coffee jar, it certainly works as suggested. I have not tried it with more than 100 watts but I did put power into it for a fair few minutes. T; /archives//html/Amps/2010-07/msg00192.html (9,171 bytes)
3. [Amps] More parasitic choke questions (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Mon, 26 Jul 2010 18:47:46 +0700; Well only one really. The recent Parasitic choke threads on here, as opposed to older threads, were interesting and reasonably concise. I appreciate well enough that there are likely many unknowns th; /archives//html/Amps/2010-07/msg00238.html (7,462 bytes)
4. Re: [Amps] More parasitic choke questions (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Tue, 27 Jul 2010 11:04:02 +0700; Oh dear, I really didn't want to drag this old horse from its resting place to start another flogging match. Apologies to Greg though as my original message was rather cryptic in its reference to thi; /archives//html/Amps/2010-07/msg00245.html (9,985 bytes)
5. Re: [Amps] More parasitic choke questions (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Wed, 28 Jul 2010 08:50:04 +0700; This was somewhat germane to my original question. Really more about how much preferred a purely carbon resistor would be to one of the more modern equivalents. Having done a little digging, RADCOM J; /archives//html/Amps/2010-07/msg00274.html (10,195 bytes)
6. Re: [Amps] More parasitic choke questions (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Wed, 28 Jul 2010 19:38:29 +0700; Interesting. What value are these resistors? Is it just a single resistor per suppressor or multiple? Don't want to fit MF resistors if there might be an issue. Thanks Martin, HS0ZED From: Gudguyham@; /archives//html/Amps/2010-07/msg00283.html (8,875 bytes)
7. Re: [Amps] More parasitic choke questions (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Wed, 28 Jul 2010 20:02:09 +0700; Thanks Carl, The suppressors in my 78 are pretty high in value, one measured 88 ohms and the other 2 around 70 ohms. All three look just fine. This amp was a US government employee in a past life and; /archives//html/Amps/2010-07/msg00284.html (14,336 bytes)
8. Re: [Amps] More parasitic choke questions (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Thu, 29 Jul 2010 08:12:48 +0700; Interesting about how they do the series capacitor arrangement though I still wonder if it is making it overly complicated. Silver Mica capacitors are about as common as Globar resistors here though; /archives//html/Amps/2010-07/msg00306.html (13,622 bytes)
9. [Amps] New HF amplifier (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Sat, 31 Jul 2010 08:56:15 +0700; http://www.youkits.com/HF2K%202000W%20HF%20amplifier.html US$3500 for a 2 kilo what! amplifier. That might be enough to choke some ;-) It says free shipping in Canada but my guess is it's made somewh; /archives//html/Amps/2010-07/msg00371.html (6,594 bytes)
10. Re: [Amps] triode or tetrode (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Thu, 26 Aug 2010 22:30:41 +0700; I recall a maxim of some good time ago that postulated power tubes (valves) can be likened to women. One is very nice, two might at first seem like it would be even nicer, however there are pitfalls; /archives//html/Amps/2010-08/msg00387.html (8,743 bytes)
11. Re: [Amps] Macaw PRM-1 (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Tue, 7 Sep 2010 13:41:38 +0700; Hi Alek, Only 2 devices? I'd think it would be hardly complex so drawing the schematic from the physical unit would not be too difficult, and useful for reference. Just the job for one of your frozen; /archives//html/Amps/2010-09/msg00035.html (8,149 bytes)
12. Re: [Amps] Henry 2k Classic X 1214A? (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Sat, 16 Oct 2010 00:55:45 +0700; I have the 2K Classic X amplifier but with the ECA1171 transformer as indicated in the manual. Not seen any mention of the 1214A, what is it? Amp certainly does the job. Needs plenty of drive but wit; /archives//html/Amps/2010-10/msg00239.html (9,585 bytes)
13. [Amps] SB220 tune capacitor (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Tue, 19 Oct 2010 09:07:02 +0700; Perhaps a question for the Heathkit history buffs. Did the tune capacitor change during the life of the SB220 or perhaps with similar amplifiers? SB200 HL220 etc. I have received a replacement capaci; /archives//html/Amps/2010-10/msg00285.html (7,751 bytes)
14. Re: [Amps] SB220 tune capacitor (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Tue, 19 Oct 2010 09:43:15 +0700; Thanks Joe, I might be looking for the special end plate then, or at least some pictures to see if I can fabricate one. 73 Martin, HS00ZED with similar amplifiers? SB200 HL220 etc. Yes, later SB220 h; /archives//html/Amps/2010-10/msg00287.html (8,963 bytes)
15. Re: [Amps] SB220 tune capacitor (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Tue, 19 Oct 2010 12:48:33 +0700; Thanks again Joe, Martin, HS0ZED Martin, pictures to see if I can fabricate one. I had to do some review but now that I looked at some SB-220 pictures, it seems that what they did was use a threaded; /archives//html/Amps/2010-10/msg00290.html (11,763 bytes)
16. [Amps] W3NQN bandpass filters, question. (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Sun, 28 Nov 2010 11:39:16 +0700; Wonder if someone here might be able to help with some info on the W3NQN bandpass filters. Our club station has some we are using between the rig and amplifier (phew, worked the amp reference in nice; /archives//html/Amps/2010-11/msg00525.html (8,067 bytes)
17. Re: [Amps] 87a Fault 9 (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Mon, 3 Jan 2011 21:54:33 +0700; Hey guys, don't make the 87 sound too good or Charly might not sell me his at a bargain basement knock down price (grin). Charly, you know our humid environment plays havoc with plugs and sockets and; /archives//html/Amps/2011-01/msg00027.html (7,833 bytes)
18. Re: [Amps] Alpha 78 Labels/upgrades (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Wed, 23 Feb 2011 21:56:02 +0700; Eric, The bulbs are mounted in sockets on the power supply pcb directly behind the meter movements. Once you have sourced the correct bulbs they are a simple replacement. On my 78 I have the meter sh; /archives//html/Amps/2011-02/msg00170.html (8,797 bytes)
19. Re: [Amps] Alpha 78 Labels/upgrades (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Sat, 26 Feb 2011 08:10:11 +0700; Some time ago I looked at the Alpha amplifier meters from that era. I had a bad multimeter in a 78. From what I could understand at the time the movements were made by Modutec, I think they are now p; /archives//html/Amps/2011-02/msg00188.html (9,621 bytes)
20. [Amps] Need microwave modules 432/30 amplifier (score: 1): Author: "Martin Sole" <hs0zed@csloxinfo.com>; Date: Tue, 22 Mar 2011 17:44:20 +0700; Want to buy a 432/30 Microwave modules 70cm 30 watt amplifier. If you have a working one in good condition please email me asap. Thanks Martin, HS0ZED _______________________________________________; /archives//html/Amps/2011-03/msg00163.html (6,907 bytes)

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