Strange Octal Tube

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Strange Octal Tube

Post by Guest on Mon Aug 04, 2014 5:53 pm

Maybe this is not so new to some of you, but it's the first time I've seen an octal tube which looks like a compactron at first glance. It is a 6V6 by GE.

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Re: Strange Octal Tube

Post by Bill Cahill on Mon Aug 04, 2014 8:27 pm

It's one of the last tubes made. I once had a 6SN7 like that. They aren't reliable, Tend to short due to their shrunken size........

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Re: Strange Octal Tube

Post by Wildcat445 on Tue Aug 05, 2014 1:58 am

I have an RCA radio with a 6V6 and a 5Y3 GT in it with the wafer base. I have a couple 6SN7's as well. I had a 6X5 with a wafer base, but sold it. I wondered what the deal was with them. Thanks for the explanation.

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Re: Strange Octal Tube

Post by 35Z5 on Wed Aug 06, 2014 11:32 am

Bill Cahill wrote:It's one of the last tubes made. I once had a 6SN7 like that. They aren't reliable, Tend to short due to their shrunken size........

First I've heard of those having any problem, got a link???
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Re: Strange Octal Tube

Post by willy3486 on Wed Aug 06, 2014 1:18 pm

I think I have some of those as well. I had to think about what you said it looked like. I don't have as many of them as compared to the older stuff.

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Re: Strange Octal Tube

Post by Bill Cahill on Wed Aug 06, 2014 8:50 pm

In the older stuff, it depends a lot on the brand. A lot of odd brands were seconds by main makers such as RCA, and, GE.

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Re: Strange Octal Tube

Post by 35Z5 on Wed Aug 06, 2014 10:41 pm

willy3486 wrote:I think I have some of those as well. I had to think about what you said it looked like. I don't have as many of them as compared to the older stuff.

Coin base octals look like this and are perfectly fine, don't short out or steal your credit card info, have wild parties, etc...

They have the advantage of button base technology(same as many full skirted octals used since the '50s) so base will never loosen as in the older press type octals... Also allows for a shorter total height, which is a non issue...

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Re: Strange Octal Tube

Post by Conelrad on Tue Oct 07, 2014 12:26 am

Coin base as they are also known, were the last gasp of the tube industry.  That base is probably the least of their problems.

Cheaper to build all the way around.  

My experience is they don't perform well over the long run, i.e. junk.

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