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Total 11 documents matching your query.

1. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "Gary Myers" <garymyers@powerc.net>; Date: Fri, 21 Jan 2011 21:13:38 -0700; Hello.... I've just completed converting a Heathkit HL2200 amp, stripping all the tank out as well as the input ckt. I left the existing plate tuning cap in and am using it as the load cap. The plate; /archives//html/Amps/2011-01/msg00221.html (9,448 bytes)
2. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "Dick Hanson" <dick@dkhanson.com>; Date: Sat, 22 Jan 2011 04:17:41 -0600; Morning, Gary..... First of all, congrats on your project! Glad to see more folks out there willing to do conversions etc to get more db on six. have too much minimum C. A 100pf variable is likely to; /archives//html/Amps/2011-01/msg00222.html (12,916 bytes)
3. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Sat, 22 Jan 2011 03:21:07 -0800; First of all, you can't trust the dip meter because the frequency will change when you couple it to the tank circuit. When I use one I wrap a turn or two of wire around it and connect it to a frequen; /archives//html/Amps/2011-01/msg00224.html (12,295 bytes)
4. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: TexasRF@aol.com; Date: Sat, 22 Jan 2011 06:58:38 EST; Hi Gary, it sounds like you are close to success on this project. On the issue of efficiency, it will be the better at higher drive levels for a couple of reasons. One, as drive is lowered, the plate; /archives//html/Amps/2011-01/msg00225.html (11,709 bytes)
5. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: K1SG@aol.com; Date: Sat, 22 Jan 2011 09:15:54 EST; Hi Gary, Dick K5AND is exactly right in his analysis that the amp has too much Tune capacitance. After we wrote the QST article (using an unmarked junkbox capacitor for the Tune cap) we realized that; /archives//html/Amps/2011-01/msg00229.html (14,272 bytes)
6. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "Gary Myers" <garymyers@powerc.net>; Date: Sat, 22 Jan 2011 08:49:00 -0700; Gerald, duh! Of course its I sqrd R! I guess I was thinking that less current would flow through it if the impedance of the U part were similar. Someone else told me they did this same conversion and; /archives//html/Amps/2011-01/msg00230.html (10,406 bytes)
7. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "Gary Myers" <garymyers@powerc.net>; Date: Sat, 22 Jan 2011 08:52:00 -0700; Dick, Thanks for the reply.... indeed I misspoke on the plate tuning cap - it is the Cardwell and it is 9-45pf. There was no mention of reducing turns on the filament choke in either article I had be; /archives//html/Amps/2011-01/msg00231.html (10,619 bytes)
8. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 22 Jan 2011 13:14:08 -0500; Absolutely! The coil's field will induce current in any conductive surface it impacts. By moving the coil closer to the top cover you increase shunt capacitance across the coil effectively increasin; /archives//html/Amps/2011-01/msg00235.html (13,021 bytes)
9. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "Gary Myers" <garymyers@powerc.net>; Date: Sat, 22 Jan 2011 11:31:59 -0700; I believe I'm there. The diameter of the coil was too large I believe (I got it from a second article by K8SMC which specified 1 9/16" diameter)... I made it 1 1/4" and repositioned it slightly. Now; /archives//html/Amps/2011-01/msg00236.html (11,634 bytes)
10. Re: [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "Gary Myers" <garymyers@powerc.net>; Date: Sun, 23 Jan 2011 12:27:45 -0700; sorry guys - I'm back.... with NOTHING having changed (believe you me - I'm an engineer that believes HEAVILY in WHAT HAS CHANGED?) today the efficiency is quite low compared to yesterday! Yesterday; /archives//html/Amps/2011-01/msg00237.html (12,333 bytes)
11. [Amps] Help with HL2200 6 meter conversion (score: 1): Author: "StellarCAT" <RXDesign@ssvecnet.com>; Date: Fri, 21 Jan 2011 20:20:37 -0700; Hello.... I've just completed converting a Heathkit HL2200 amp, stripping all the tank out as well as the input ckt. I left the existing plate tuning cap in and am using it as the load cap. The plate; /archives//html/Amps/2011-01/msg00250.html (11,029 bytes)

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