[Milsurplus] Crawfishing: BC-375 on 30 Meters

[David Stinson]

Well, I'll have to call "hold up" on the BC-375 on 30 meters.
After doing several other "tinkers," I've been unable to 
replicate the success against thermal drift.  
The drift is back on 30 and 40 meters.
Don't yet know why.

The rig is still stable on 160 and 80.
I'm going to focus on finding the best substitute tubes 
for now and get back to the 30-40 drift problem later.

813 will not fit in the available space (socket mods not allowed).
811/812 will fit but requires regulating the filament voltage down.
Will order an 8 Amp DC-DC buck module for that.
Going to try some 7894s, which are very cheap and 
have the right fil. rating.

73 DE Dave AB5S