Tag: UV201

Adding filament bias and output caps

This is what I managed to do with a couple of hours at the workshop. Time is gold for me these days. Quick drilling and fitting the main components. You can’t get a smaller preamp than this one. It’s quite packed:

Planning the layout before drilling

Back panel with all connectors (supply and signal)

Inside the preamp

Close look at the gyrator boards

UV4 sockets with rubber dampers

Fitting a pair of brass base UV201a

Next, soldering. Yay, just looking forward to my favourite part of the build process

Just playing with the layout a bit. The gyrator boards, the UV4 sockets and the Rod Coleman regulators. All in a tiny aluminium box: