The Westinghouse, as someone else pointed out, is a 5-500. Not the most
common tube....
I'd compare bases and what's connected to what, and see if they really are
the same, or you have a 5-500 and a 4-400...
--Shane
KD6VXI
On Sun, 28 Nov 2010 20:24:35 -0800, Bill Coleman <aa4lr@mac.com> wrote:
>
> On Nov 28, 2010, at 11:09 PM, mike stokes wrote:
>
>> Hi Guys
>>
>> Someone gave me 2 tubes years ago and said they were 3-500s. Well I am
>> not
>> sure they really knew, and I don't know as the lettering is worn off.
>> Here
>> is a link with some pics.
>>
>> http://picasaweb.google.com/mike9v/Tubes#
>>
>> The one on the left is an Eimac. It end in an A and has S4 7704
>> stamped
>> inside.
>>
>> The one on the right is a Westinghouse and looks like it says 5/5xxA
>> where
>> the x in worn and illegible.
>>
>> Any ideas on what these really are ? Or what is a good way to figure
>> it out
>> ?
>
> Looks more like a 4-400A. Go to Google and then click on images and
> search a bit.
> 3-500Z / 3-400Z don't have the metal base.
>
> Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@mac.com
> Quote: "We invented personal computing."
> -- Bill Gates @ TechNet / MSDN 2003
>
>
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