- 1. [Amps] More Amperex 3-500Z (score: 1)
- Author: Larry <larry@w7iuv.com>
- Date: Thu, 31 Jan 2008 08:36:47 -0800
- Thanks to all that replied with info. I had hoped there would be more definitive data, but the mystery still remains. Here's what I know for sure: In 1969 Amperex was owned by North American Phillips
- /archives//html/Amps/2008-01/msg00270.html (8,858 bytes)
- 2. Re: [Amps] More Amperex 3-500Z (score: 1)
- Author: "jeremy-ca" <km1h@jeremy.mv.com>
- Date: Thu, 31 Jan 2008 12:27:31 -0500
- The Drake L-7 manual lists both brands and expected idling currents. CW and SSB respectively: Amperex 100/160 ma Eimac 170/220 As bias is not adjustable in most 3-500 amps it then holds that the Ampe
- /archives//html/Amps/2008-01/msg00271.html (11,520 bytes)
- 3. Re: [Amps] More Amperex 3-500Z (score: 1)
- Author: Larry <larry@w7iuv.com>
- Date: Thu, 31 Jan 2008 09:53:02 -0800
- Carl, Thanks. Good data points. Do you have a publication date on that Drake manual? (approx OK) Can you approximate the date/year you observed the comparative operation in the SB-220? My 1969 short
- /archives//html/Amps/2008-01/msg00272.html (12,272 bytes)
- 4. Re: [Amps] More Amperex 3-500Z (score: 1)
- Author: "jeremy-ca" <km1h@jeremy.mv.com>
- Date: Thu, 31 Jan 2008 16:09:27 -0500
- April 1980. However further looking finds the exact same info in a 1970 L-4B manual. Both manuals state that EIMAC or Amperex 3-400Z's or 3-500Z's are installed at the factory. Many years thru the 60
- /archives//html/Amps/2008-01/msg00276.html (14,812 bytes)
- 5. Re: [Amps] More Amperex 3-500Z (score: 1)
- Author: "Steven Grant, W4IIV" <stevengrant98@yahoo.com>
- Date: Thu, 31 Jan 2008 14:21:39 -0800 (PST)
- the 3-400 tube was inspired by Art Collins An engineer in the collins co. designed a GG amp with the famous zero bias 4 811s. Art liked the designed but had a loyalty to Eimac, so he asked Eimac to d
- /archives//html/Amps/2008-01/msg00277.html (16,136 bytes)
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