On Sat, 12 Apr 2003 14:04:59 -0500 Jim Isbell
<millenniumfalcon@cableone.net> writes:
> I just acquired a 4-1000A and am wondering about its history. It
> came in an Eimac carton and looks like it is unused as there is NO
> discoloration of the glass and the plates are a light gray in color.
>
> But it is marked on the envelope as being made by Raytheon. Did
> Raytheon make tubes for Eimac???
Hi Jim,
In that time period (mid-60's), Raytheon owned Penta Labs (aka
Machlett) so, they would have been able to make some tubes under their
own name.
> Other markings on the tube include a JAN-CBZC-8166 / 4-1000A and
> what may be date codes 65 25
>
> Inside the tube on the lower support structure are the numbers 523
> 557
>
> Can anything be inferred from these numbers?
The Eimac tubes I've seen include a letter as part of the lot prefix.
Another vote for Raytheon.
73 & Good afternoon,
Marv WC6W
*
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