[georgetownjohn]

Thanks for the info Greg.  I have bought a 37-620 non-working chassis in the hopes that I can use parts of the RF unit/bandswitch for my 37-640.  The reason I think it might  be possible is because the tuner front bracket of my 37-640 has 37-620 stamped on it from the factory. ---John

[Greg]

Replacing that one section of the band switch makes sense. Just make sure the two have the same connections, though I can't imagine they don't match.

I have a 620 I'm working on and a 630 I got for parts. I noticed that the 2 band switches differed a bit in that one or the other has spare lugs (not connected via the switch) that were used for to connect stuff. 620 had a bad BC band antenna coil which I replaced with the one from the 630.

Otherwise, the two radio's (630/620) schematics look identical with the exception of the 620 having a 10K resistor where the 630 has a shadow meter.