[ForSale-Swap] Checking 3-500 tubes

[KK5VR at ARN.NET]

To all:
  I ran across 3, 3-500 tubes made for the SB-220 (and other) amps. I need to

check these tubes the easiest way. Is there a way of checking these tubes for

worthiness with a VOM meter or would I have to put them in an amp under a
load? I
do have an SB-220. Any comments would be useful. Thanks for your for your
help.
   GT