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 Post subject: 80 tubes ST type vs later type
PostPosted: Feb Thu 03, 2011 12:04 am 
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What if any differences are there in the 80 tubes from the ST style to the newer shorter ones. Does one run hotter than the other? Or does it really make no difference at all

Thanks in advance for your replies.

Gene P


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PostPosted: Feb Thu 03, 2011 12:13 am 
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Logic would summarize that for the same load the smaller GT would run hotter, less surface area in glass to radiate the heat.. Imagine the equivalent tube in metal, OUCH!

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PostPosted: Feb Thu 03, 2011 12:21 am 
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Thanks Chas,
I guess I will look for the More expensive ST type.


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PostPosted: Feb Thu 03, 2011 12:23 am 
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Gene,
How many do you need and do they have to be new or specific brand?

Note, the same BTU's will be radiated irregardless of bulb type.

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PostPosted: Feb Thu 03, 2011 1:08 am 
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Chas,
I need two for my GE G-106. There was only one on the chassis and it tests questionable. I don't need brand specific. From what I have read here the closer the two readings are together the better the tube is as long as they are in the "good" zone. Is that correct?


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PostPosted: Feb Thu 03, 2011 1:15 am 
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Since I have to replace both of them I would prefer new.

Gene


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PostPosted: Feb Thu 03, 2011 1:25 am 
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You would probably pay a disproportionately higher price for NOS. Many of the used I test, test as high as NOS, and the price is MUCH less for used.

Gene

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PostPosted: Feb Thu 03, 2011 1:31 am 
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Geneoo.

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 Post subject:
PostPosted: Feb Thu 03, 2011 1:42 am 
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Gene, 80's in your G-106? Mine has a 5U4G. Are you thinking 6V6's? It has enough air space so any type should work.


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PostPosted: Feb Thu 03, 2011 2:23 am 
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Hi Jim,
Another brain cramp! They are for the Wells Gardner Aria.
I just went downstairs and looked at the schematic and figured out I was thinking of the wrong radio.

This must be what happens when you have more than one radio apart at the same time. Either that or my old age is really starting to show :cry:

Gene


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 Post subject:
PostPosted: Feb Fri 04, 2011 8:05 am 
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Note that the 5Y3 type is simply an 80 on an octal base, and no one ever worries about 5Y3GT tubes getting too hot.

Jim Cross


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