I ask because my pair 2a3 suddenly tested from medium good to borderline in a month.
My friend suggest I should give it up because the complexity of the power supply but I don't think I am ready to throw the towel yet.
My question is if I can tune the 2A3 to suggested operating condition, let the driver tube and 2a3 filament light up first with separate tranny, delay the B+ for above 1 min, at the same, use tube voltage regulation to ram up the B+ from zero to 425v. Will the nature of such kind of circuitry , I mean direct couple, the higher plate voltage shorten the tube life? Is there anything I need to address?
Thank you
Wal
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Topic - Will direct coupling shorting tube life?? - bouncy ball 19:04:57 05/20/12 (22)
- Not if you wear protection.... nt - caffeinator 09:40:50 05/21/12 (1)
- And if your wife doesn't find out ... nt - danlaudionut 23:17:09 05/22/12 (0)
- I am so careless and stupid......... - bouncy ball 08:22:40 05/21/12 (8)
- RE: I am so careless and stupid......... - Stuben 15:44:51 05/23/12 (0)
- So sorry to hear this.... - drlowmu 21:25:26 05/21/12 (0)
- RE: I am so careless and stupid......... - Michael Samra 20:06:00 05/21/12 (0)
- RE: I am so careless and stupid......... - Paul Joppa 19:35:05 05/21/12 (1)
- 2a3 at 5v sounded really good, but real short glory! (nt) - bouncy ball 20:31:00 05/21/12 (0)
- RE: I am so careless and stupid......... - GTCharlie 16:28:11 05/21/12 (1)
- thanks for the suggestion. - bouncy ball 18:30:54 05/21/12 (0)
- And you post on the wrong thread ;-) Nice to find an answer. (nt) - Chris O 11:46:59 05/21/12 (0)
- Specific Information is needed ......Define circuit - drlowmu 06:22:40 05/21/12 (4)
- yes, your are right - bouncy ball 18:42:30 05/21/12 (2)
- More hints on Dc amp optimization..... - drlowmu 22:09:25 05/21/12 (1)
- thank you so much. Once I have "de-bugged" everything, will try the operation point that u suggest (nt) - bouncy ball 07:25:32 05/22/12 (0)
- RE: Good Stuff Jeff. - griboon 17:19:00 05/21/12 (0)
- RE: Will direct coupling shorting tube life?? - deathtube 667 05:41:38 05/21/12 (0)
- RE: Will direct coupling shorting tube life?? - Neff 04:42:58 05/21/12 (0)
- RE: Will direct coupling shorting tube life?? - Paul Joppa 19:40:35 05/20/12 (3)
- RE: Will direct coupling shorting tube life?? - GTCharlie 17:23:31 05/25/12 (0)
- RE: Will direct coupling shorting tube life?? - RPMac 07:39:15 05/21/12 (1)
- RE: Will direct coupling shorting tube life?? - mikeyb 07:47:49 05/21/12 (0)