[Milsurplus] Modulators For ART-13

[Michael D. Harmon]

I have a couple of ART-13A transmitters, and I'd like to get a spare set 
of 811 modulator tubes.  Someone told me some time ago that I should use 
811 tubes rather than 811A's.  Is there any truth to that?  The 811A's 
are built heavier than the 811's, and they are certainly easier to 
find.  Is there any reason to try to find a set of good 811's or will 
the 811A's work OK in the transmitter?


Thanks for the advice!

Mike Harmon, WB0LDJ