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
You are a highly efficient worker. I have family as well.
This afternoon I managed to build the second gyrator with BF 862 with two glasses on my nose. 🙂
They are such little things to solder! It’s painful indeed. If you have a microscope, easier task. Hope you get it up and running soon. Cheers, Ale
Looking Sexy
Hi Ale, are you still using the same HT Power Supply that was used in version 2?
Yes, that’s a benefit of the gyrator. You can adjust a wider range of HT levels as the top mosfet handles it with extra dissipation. At lower currents this isn’t any challenge and I don’t have the fet with a heatsink, not needed for 3mA idle current