- 1. [AMPS] L-4B (score: 1)
- Author: jhenders@zianet.com (Jim Henderson)
- Date: Mon, 08 Sep 1997 12:43:48 +0000
- Esteemed Reflectees: Don't see much commentary on the L-4B, but mine just cratered. Was in standby when a crack and long fizzle sound came out of the RF section. The grid resistor opened up, and the
- /archives//html/Amps/1997-09/msg00162.html (7,483 bytes)
- 2. [AMPS] L-4B (score: 1)
- Author: km1h@juno.com (km1h @ juno.com)
- Date: Mon, 08 Sep 1997 12:42:27 EDT
- On Mon, 08 Sep 1997 12:43:48 +0000 Jim Henderson <jhenders@zianet.com> writes: There is no grid resistor as such in the L4B Jim. Which part opened up? In the standy position, the only path thru the g
- /archives//html/Amps/1997-09/msg00165.html (8,788 bytes)
- 3. [AMPS] L-4B (score: 1)
- Author: measures@vc.net (Rich Measures)
- Date: Mon, 8 Sep 97 10:50:54 -0800
- IMO, this condition indicates that a grid to filament short exists in one of the tubes when the filaments are hot. It reportedly happens in about 5% of the cases, Jim. With the filaments hot, you wi
- /archives//html/Amps/1997-09/msg00170.html (8,317 bytes)
- 4. [AMPS] L-4B (score: 1)
- Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net)
- Date: Mon, 8 Sep 1997 23:47:30 +0000
- To: <amps@contesting.com> Most likely a tube arced internally Jim, although it's tough to say for sure. What grid resistor opened up? Even if the tubes were biased on, a parasitic doesn't seem likel
- /archives//html/Amps/1997-09/msg00182.html (8,248 bytes)
- 5. [AMPS] L-4B (score: 1)
- Author: measures@vc.net (Rich Measures)
- Date: Tue, 9 Sep 97 10:05:31 -0800
- To: <amps@contesting.com> Nah, it's easy. Check the tube with a high-pot. tester in a dark room. If the insides glow blue at 3kV, a gas arc is definitely a possibility. If the tube has a normal vacu
- /archives//html/Amps/1997-09/msg00201.html (7,604 bytes)
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