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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: my bias is running away on one side even with the bias backed all the way off on that side! posted by Jonesy on July 23, 2020 at 13:10:22:
Thanks, Jonesy.
Whewwww, that was a lot of resistors!
All the resistors on the tube sockets were reading nearly identical, left & right. There were some other resistors (not soldered to the tube sockets) that were nearly identical, also, left to right. Then there are a pair of blue resistors with 2 gold & 2 red stripes & they took a long time to get there, but on the good side one reads 196.6 & on the bad side 207.3.
Then there were two black resistors with a silver stripe & "540" on them that, not understanding electricity, seemed totally bizarre to me. The first time I checked them, they were 237.6 & 317.1; I checked them a second time & they both counted down from 11 to under 1!?!?
So anyway, thanks for the info on the caps. I guess that would explain why I cannot get consistent readings on the yellow Kimber kaps. But I cannot get any consistent readings on the large black caps with the terminals that I unscrewed the leads from when I checked them, either. I wonder why I am getting consistent readings on 3 of the 4 Jensen caps? & no, I definitely would NOT be comfortable working on this while it was powered up.
I have sent Cary an email describing the scenario & what I measured on the caps, but I am not holding my breath for a reply. Their customer service used to be so good back in the '90s when I first started buying Cray products. I guess with a subdued economy, no telephone tech support is part of necessary cost savings.
I still have the very first tube amp I ever bought (back in '93 or '94), a Cary SLA70, a little stereo amp that runs with 4 6550s & a pair 6SL7s & a pair of rectifier tubes. The last time I had it running was forever ago, back in '99 after I caught one of my ARC VTM 120s on fire & had to send it to Mn to repair my handiwork.
Oh well, I'll go on hold on the V12 & start getting the little Cary set up. hey, thanks again for your input, Jonesy!
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Follow Ups
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - immatthewj 14:35:10 07/23/20 (31)
- Cary Customer Support - AbeCollins 06:51:56 07/28/20 (1)
- RE: Cary Customer Support - immatthewj 11:45:26 07/28/20 (0)
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - Jonesy 17:32:42 07/23/20 (28)
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - immatthewj 23:48:12 07/23/20 (27)
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - Jonesy 05:46:38 07/24/20 (26)
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - immatthewj 10:35:27 07/24/20 (25)
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - Jonesy 11:03:04 07/24/20 (24)
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - immatthewj 11:27:56 07/24/20 (23)
- RE: my bias is running away on one side even with the bias backed all the way off on that side! - Jonesy 17:04:11 07/24/20 (22)
- Thank you! And cap questions? - immatthewj 22:03:52 07/25/20 (21)
- RE: Thank you! And cap questions? - Jonesy 23:42:26 07/25/20 (20)
- RE: Thank you! And cap questions? - immatthewj 17:12:33 07/26/20 (19)
- RE: Thank you! And cap questions? - immatthewj 17:24:29 07/26/20 (18)
- RE: Thank you! And cap questions? - immatthewj 17:44:30 07/26/20 (17)
- RE: Thank you! And cap questions? - Jonesy 18:53:48 07/26/20 (16)
- RE: Thank you! And cap questions? - immatthewj 11:04:37 07/27/20 (15)
- RE: Thank you! And cap questions? - Jonesy 11:44:28 07/27/20 (14)
- RE: Thank you! And cap questions? - immatthewj 14:24:26 07/27/20 (13)
- RE: Thank you! And cap questions? - Jonesy 09:33:47 07/28/20 (11)
- RE: Thank you! And cap questions? - immatthewj 11:48:52 07/28/20 (10)
- ... also a reminder bias is set with no signal. It goes up and down once signal applied. (nt) - Jonesy 15:01:40 07/28/20 (8)
- RE: ... also a reminder bias is set with no signal. It goes up and down once signal applied. (nt) - immatthewj 20:25:26 07/28/20 (7)
- RE: ... also a reminder bias is set with no signal. It goes up and down once signal applied. (nt) - Jonesy 21:27:18 07/28/20 (6)
- RE: ... also a reminder bias is set with no signal. It goes up and down once signal applied. (nt) - immatthewj 12:50:31 07/29/20 (5)
- Economic "in circuit" capacitor meter - Jonesy 14:50:59 07/29/20 (4)
- RE: Economic "in circuit" capacitor meter - immatthewj 14:59:45 07/29/20 (3)
- RE: Economic "in circuit" capacitor meter - Jonesy 15:11:12 07/29/20 (2)
- RE: Economic "in circuit" capacitor meter - immatthewj 15:24:56 07/29/20 (1)
- RE: Economic "in circuit" capacitor meter - immatthewj 16:26:12 08/05/20 (0)
- RE: Thank you! And cap questions? - Jonesy 14:44:08 07/28/20 (0)
- RE: Thank you! And cap questions? - Jonesy 14:54:19 07/27/20 (0)
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