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1. [AMPS] Re:Question: input Z on class AB gnd grid pair4-400 ?? (score: 1): Author: nj4f@erols.com (Steve Bookout); Date: Thu, 13 Jan 2000 13:39:11 -0500; Rich said regarding 4-400's: For that tube, I don't think the SB-220 method is ideal at all. It is my understanding that due to the physical difference of the tube having the ring with the holes in i; /archives//html/Amps/2000-01/msg00261.html (8,709 bytes)
2. [AMPS] Re:Question: input Z on class AB gnd grid pair4-400 ?? (score: 1): Author: w7iuv@nis4u.com (Larry Molitor); Date: Thu, 13 Jan 2000 23:03:31 +0000; Steve, That's just what I thought some years ago. since I saw so many cross-cooled amps being built, I decided to de-bunk that idea myself. I built a mono-band amp with a pair of 4-400A's. Put the so; /archives//html/Amps/2000-01/msg00267.html (8,878 bytes)
3. [AMPS] Re:Question: input Z on class AB gnd grid pair4-400 ?? (score: 1): Author: nj4f@erols.com (Steve Bookout); Date: Thu, 13 Jan 2000 19:04:17 -0500; OK, Larry, nothing like a little real experience to put things in perspective. I never tried it that way, but always read that it was not the way to go. (Maybe written by those who wanted to cover th; /archives//html/Amps/2000-01/msg00269.html (9,402 bytes)

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