|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
For Sale Ads |
Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.
Original Message
Will direct coupling shorting tube life??
Posted by bouncy ball on May 20, 2012 at 19:04:57:
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