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8-pin tube bases
2/13/2007 8:14:43 PMMikeC
Hi folks,Was wondering if anyone knew of a place or someone who has a supply of eight pin tube bases.I would like the large diameter ones like those on GT style tubes,but without the metal shield that some of them have.They must also have all eight pins in place.I know that there are commercial venders who sell this item ,but $1.75 to $2.25 each seems rather pricey.I would even buy a quantity of dud tubes and remove them myself.20 or so would be good to start with,could need a good amount in the future .Thanx.Mike
2/16/2007 1:26:28 AMThomas Dermody
Most tube bases have one or two pins removed. Television tubes of the octal variety are somewhat common, though. They're very cheap, too. You can often get a whole box of television tubes for very cheap on eBay.

Also, if anyone's interested, the octal horizontal output tubes found in 1950s and 40s televisions can often be used in place of a 6V6 or 6F6 if its pin-out is the same (the filament draw will often be more). Of course you'll have to run the plate wire from pin 3 to the cap on top. I don't think anyone's interested in using HOTs for 6V6s, though. Just thought I'd mention it. It'd be dangerous, anyway, with the plate cap on top. I used to make amplifiers with HOTs, though, because they were readily available and very cheap. Can't remember the numbers, but there are some 6 volt ones that'll work like a 6V6, and the 25E5 will work for a 25L6. Both have the same pin-out except for the plate cap on top of the 25E5.

2/17/2007 6:56:19 PMNorm Leal
Hi Mike

I posted this somewhere else. TV tubes, like Thomas mentioned, are a good place to get octal bases. 6SN7GT and 6SL7GT both have all 8 pins and were common in older TV's. I uses these bases for battery radio to power supply connections.

Norm

:Most tube bases have one or two pins removed. Television tubes of the octal variety are somewhat common, though. They're very cheap, too. You can often get a whole box of television tubes for very cheap on eBay.
:
:Also, if anyone's interested, the octal horizontal output tubes found in 1950s and 40s televisions can often be used in place of a 6V6 or 6F6 if its pin-out is the same (the filament draw will often be more). Of course you'll have to run the plate wire from pin 3 to the cap on top. I don't think anyone's interested in using HOTs for 6V6s, though. Just thought I'd mention it. It'd be dangerous, anyway, with the plate cap on top. I used to make amplifiers with HOTs, though, because they were readily available and very cheap. Can't remember the numbers, but there are some 6 volt ones that'll work like a 6V6, and the 25E5 will work for a 25L6. Both have the same pin-out except for the plate cap on top of the 25E5.



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