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AUDIO FORUMS >> Replacement Tubes >> OA3 tube
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Message started by settipani on 02/17/08 at 01:25:35

Title: OA3 tube
Post by settipani on 02/17/08 at 01:25:35

I'm looking at the SE84ZSM blocks & I was wondering what is the durability/ life span in hours of a OA3 tube? I'm looking for sources to purchase this tube & I'm have troubles finding them. Any sub or upgrade to this voltage regulation tube?

Title: Re: OA3 tube
Post by rayd on 02/17/08 at 11:42:35

Hi settipani,

According to Steve, there are no advantages to rolling this tube in the new monos. (See Reply #55 in this thread).

As to durability/lifespan, that I don't know.

- Ray

Title: Re: OA3 tube
Post by settipani on 02/17/08 at 13:57:02

Thanks for the link...it answered part of my question.

Also it lead into Steve's article on the secret behind the Zen Triode output transformers.

Steve
I had a similar experience in my industry with a gentleman that retired from NASA’s computational sciences branch after 43 years. I agree, tight logic design solutions produce the best results to new developments.

Title: Re: OA3 tube
Post by Crazy Bill the Eel Killer on 02/20/08 at 03:35:55

Hello Settipani,

Here's a link that should answer your question.

http://www.hawthorneaudio.com/forums/viewtopic.php?f=8&t=1623

While the tubes aren't exact equivalents, they're both cold cathode types, just operating at different voltages. Try ebay. Don't be afraid of the Russian equivalents.

Cheers, Crazy Bill :)