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201. [AMPS] G2DAF Circuit (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 26 Oct 2000 18:41:58 EDT
On Thu, 26 Oct 2000 16:08:36 -0400 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, The 4-125 exhibits about 2.5K of grid impedance at 100V peak (positive) drive. The pair will be about 1.25K. This
/archives//html/Amps/2000-10/msg00589.html (9,374 bytes)

202. [AMPS] G2DAF Circuit (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 26 Oct 2000 21:55:05 EDT
On Thu, 26 Oct 2000 20:02:24 -0400 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, The original article states that the amp required 25 watts of drive. 17 watts, if I recall correctly, went into th
/archives//html/Amps/2000-10/msg00595.html (11,306 bytes)

203. [AMPS] G2DAF Circuit (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 26 Oct 2000 22:27:21 EDT
On Thu, 26 Oct 2000 21:24:20 +0200 Peter Sundberg <sm2cew@telia.com> writes: Hi Peter, people Complements are gratefully accepted. ok, the amp modulation IMD testing using white noise is possibly a m
/archives//html/Amps/2000-10/msg00596.html (10,953 bytes)

204. [AMPS] Re: G2DAF Amps Circuit (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Fri, 27 Oct 2000 11:43:03 EDT
two Hi Rich, Why won't an input signal derived screen "supply", with a 50uS time constant, follow the RF envelope during a two-tone test?? 73, Marv WC6W * ____________________________________________
/archives//html/Amps/2000-10/msg00611.html (8,055 bytes)

205. [AMPS] G2DAF Circuit (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Fri, 27 Oct 2000 11:43:03 EDT
On Fri, 27 Oct 2000 07:32:57 +0100 "Ian White, G3SEK" <G3SEK@ifwtech.com> writes: Hi Ian, It may or may not be standard practice but, in my own work, I try to get the power supply(s) working correctl
/archives//html/Amps/2000-10/msg00612.html (9,416 bytes)

206. [AMPS] Re: G2DAF Amps Circuit (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Fri, 27 Oct 2000 12:36:54 EDT
It doesn't have to follow 7MHz or 30MHz or even 1.8 MHz. It only has to follow the envelope of the two-tone signal which has been bandlimited by passing through a couple kHz wide filter. 10 KHz compl
/archives//html/Amps/2000-10/msg00614.html (8,267 bytes)

207. [AMPS] Portable linear using a DAF? (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Mon, 30 Oct 2000 11:16:43 EST
Hi Hans & Tom, They are available but, verrrrrrrry pricey. The engineering is not that hard. Two chips can take care of most of the work. One for a PFC boost stage -- Micro Linear ML4812, Texas Instr
/archives//html/Amps/2000-10/msg00678.html (9,961 bytes)

208. [AMPS] Portable linear using a DAF? (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Mon, 30 Oct 2000 16:39:22 EST
On Mon, 30 Oct 2000 13:44:18 -0500 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, The transformers are not that hard, unless you are realllllllly trying to optimize them. A large cup core should b
/archives//html/Amps/2000-10/msg00688.html (11,431 bytes)

209. [AMPS] Portable linear using a DAF? (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Mon, 30 Oct 2000 21:14:41 EST
On Mon, 30 Oct 2000 17:49:31 -0500 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, I have a some friend's who've been doing this kind of work for years -- one to drive big movie strobe lights and t
/archives//html/Amps/2000-10/msg00692.html (11,896 bytes)

210. [AMPS] Portable linear using a DAF? (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Tue, 31 Oct 2000 10:52:48 EST
On Mon, 30 Oct 2000 21:55:51 -0500 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, Keep up the good work! up the The 19th harmonic of 100KHz (first thing you have to worry about; on 160 meters) is
/archives//html/Amps/2000-10/msg00707.html (11,668 bytes)

211. [AMPS] FCC Part 97.317 (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Wed, 13 Sep 2000 12:21:54 EDT
On 13 Sep 2000 08:39:50 -0700 Mike Gilmer - N2MG <n2mg@contesting.com> writes: (snip) Hi Mike, YES, that is exactly what that part is all about. Take a look at subsection 97.317 c 8 (Oct. 1995 editio
/archives//html/Amps/2000-09/msg00616.html (8,956 bytes)

212. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Wed, 13 Sep 2000 23:30:10 EDT
Here is my entry into the interesting project category -- A Kilowatt transistor SSB/FM/AM/CW/etc. transmitter for 160 through 6 meters. The transmit chain consists of: 1. A Mike preamp connected to a
/archives//html/Amps/2000-09/msg00687.html (11,670 bytes)

213. [AMPS] Re: K0FF (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Wed, 13 Sep 2000 23:30:10 EDT
On Wed, 13 Sep 2000 15:00:22 -0700 (PDT) michael watts <wy6k@yahoo.com> writes: I've looked at doing some of that in a 4-400 amp that I'm building. I ended up using a rotary tuned input structure (be
/archives//html/Amps/2000-09/msg00688.html (8,409 bytes)

214. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 14 Sep 2000 11:04:57 EDT
On Wed, 13 Sep 2000 21:44:22 -0700 (PDT) michael watts <wy6k@yahoo.com> writes: Neither deities nor fish are necessary to complete this project. :-) (snip) * _________________________________________
/archives//html/Amps/2000-09/msg00715.html (9,211 bytes)

215. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 14 Sep 2000 11:04:56 EDT
STUFF Hi Dave, Well, if Kenwood, Yeasu, Icom, NRC, Ten-Tec, etc... spent 1/10 the time & $$$ on the signal chain that they invest in the knobs, readouts & menus... I wouldn't have to build this mysel
/archives//html/Amps/2000-09/msg00716.html (9,083 bytes)

216. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 14 Sep 2000 11:04:57 EDT
On Thu, 14 Sep 2000 07:58:09 +0100 "Bob Duckworth" <wb4mnf@atl.org> writes: Hi Bob, Relays are probably the easiest. There will be some rather large (circulating) currents to pass. Also, some rather
/archives//html/Amps/2000-09/msg00717.html (9,054 bytes)

217. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 14 Sep 2000 11:04:56 EDT
On Thu, 14 Sep 2000 09:48:38 -0400 William Fuqua <Wlfuqu00@pop.uky.edu> writes: time!!!! successful Hi Bill, Noooo.... not definitely not DAF but, SSB amplification by Envelope Elimination and Restor
/archives//html/Amps/2000-09/msg00718.html (9,889 bytes)

218. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 14 Sep 2000 11:04:57 EDT
On Thu, 14 Sep 2000 09:34:56 -0400 "Bruce R. Knox" <bknox@rfapps.com> writes: the / Hi Bruce, Your numbers are correct for the basic frequency resolution of the system though, I am only planning to i
/archives//html/Amps/2000-09/msg00719.html (9,821 bytes)

219. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 14 Sep 2000 11:29:50 EDT
On Thu, 14 Sep 2000 10:22:00 -0400 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, I'm not quite sure which sidebands you are concerned with... The note you replied to from Bruce concerns the FM mo
/archives//html/Amps/2000-09/msg00721.html (10,426 bytes)

220. [AMPS] Interesting projects -- All Mode KW Transmitter (score: 1)
Author: wc6w@juno.com (Radio WC6W)
Date: Thu, 14 Sep 2000 23:15:05 EDT
On Thu, 14 Sep 2000 11:40:37 -0400 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, The power amp will be used in all modes essentially amplifying a CW signal. The amplifier will be high level Drain
/archives//html/Amps/2000-09/msg00741.html (10,185 bytes)

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