I just picked up a "virtually new" YC156 - with 12 minutes runtime. I
decided to test it on the BVT against a used/good MRI pull I have the
shelf. Since the BVT is new to me I found some interesting things and
thought I'd post for comment:
LEAKAGE
Anode-Grid NEW USED
-------------------------------------------
5000 - -
5500 - 5uA
9000 - NOT TESTED
Cathode-Grid NEW USED
-------------------------------------------
600V 5uA 5uA
So... Since I'm new at interpreting these results, here they are for
comment. Do you agree?
(1) I need to getter the used tube before putting it into service
(2) Cathode-grid isolation is surprisingly low on these tubes, but since
both new and used tubes tested identically across those elements I'm
going to assume this is normal. I have a third tube that I can pull out
of storage and test to increase the sample size, but I want to collect
any comments first.
Thanks,
Jim N7CXI
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