[Collins] KWM-2

[W4BYG]

I have obtained a very clean KWM-2 which was not working, but very much 
worth the effort to repair.  I've never had one before, so I'm just 
learning about it.

I first found bad tubes as follows, 3 - 6U8's, 3 - 6AZ8's and 2 - 
6BN8's. Several had open filaments, one was shorted.  I've never seen a 
radio with this many bad tubes, so I suspect a previous owner did 
something wrong in powering it.

After applying a siggen, I now have a very weak signal going thru it, 
but the sensitivity is way down.

I have a manual for it.  The schematic seems to indicate several jumpers 
should be in place when operating without any accessories and yet the 
hookup diagrams and installation instructions show or say nothing, about 
any jumpers.  It does not have a NB.  The 100khz calibrator also does 
not work.

When bench testing the rig with only the 516 AC power supply only, are 
any jumpers necessary to make it functional?

Anyone else ever experienced a similar multi-tube failure in a KWM-2 or 
have any helpful suggestions?

You attention is appreciated.
Ray, W4BYG
Naples, FL