[Amps] 3-500Z labeling

[Jim]

Are there serial numbers on the grid mounting disk/cone below the plate?


Thanks
73
Jim W7RY

On 12/7/2018 11:09 PM, Jim Durham wrote:
> Hey Paul,
> Look very hard in a good light. I think I have seen labeling on older 
> tubes fade so badly that it looks like there is nothing there.
>
> 73, Jim, W2XO
>
> On 12/6/18 10:36 AM, Paul Baldock wrote:
>> I have two 3-500Z's that I removed from a Drake L4B. These tubes have 
>> no brand labeling or residue of labeling. They are the variety that 
>> have 5 Anode disks. Has anybody seen 3-500Zs with out brand marking?
>>
>> - Paul  KW7Y 
>
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