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1. [AMPS] Tubes for QRO (score: 1): Author: markeh@erols.com (Mark Hall); Date: Tue, 16 Mar 1999 08:15:12 -0500; Does anyone have an opinion on the Penta Labs PL-175 tube in a QRO HF amplifier? Mid to Late '60's I believe. For a while Eimac copied it as the 8295 with full military pomp and circumstance. Metal/G; /archives//html/Amps/1999-03/msg00339.html (8,975 bytes)
2. [AMPS] Tubes for QRO (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 16 Mar 1999 06:26:07 -0600; I've been told the PL-175 is an equivalent to a 4-400A. I've got a pair from an old Viking-Johnson Invader. Probably going to use them in my next amp project which will be a 6m amp. 73, Jon KE9NA --; /archives//html/Amps/1999-03/msg00342.html (7,595 bytes)
3. [AMPS] Tubes for QRO (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 16 Mar 1999 07:49:59 -0800; ? Painfully long pre-heat, not low IMD, requires a 3400rpm blower. Finding a spare may cause loss of hair. . . Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http:; /archives//html/Amps/1999-03/msg00345.html (7,028 bytes)
4. [AMPS] Tubes for QRO (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 16 Mar 99 09:55:36 -0600; Don't think so. I think you guys are thinking of the PL-172. The 175 is a small, 4-400 type tube. I have 2 of them and checked the number myself. The original poster admitted to me he got the number; /archives//html/Amps/1999-03/msg00346.html (7,392 bytes)
5. [AMPS] Tubes for QRO (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 16 Mar 1999 14:48:01 -0800; ? agreed. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUE; /archives//html/Amps/1999-03/msg00350.html (7,217 bytes)

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