[Amps] [Bulk] Help identifying tubes

[Roger]

On 11/28/2010 11:24 PM, Bill Coleman 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.
Nor have I ever seen one with a anode shaped like that. I agree, they 
sure look like 4-400s.

73

Roger (K8RI)
> Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at mac.com
> Quote: "We invented personal computing."
>             -- Bill Gates @ TechNet / MSDN 2003
>
>
> Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
> Web: http://boringhamradiopart.blogspot.com
> Quote: "Not within a thousand years will man ever fly!"
>              -- Wilbur Wright, 1901
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>