[Amps] YC156 BVT measurements

[Jim Barber]

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