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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