Search This Blog

Radio Guy Tees

Radio Guy Tees
Radio Guy T-Shirts

Thursday, 21 June 2012

FT-847 Pre-Amp Installation

So, now that I have built and done the basic DC test on the new FT-847 pre-amp last time:

It's time to install the board in the Radio. This looks to be a fairly straightforward operation, replacing one board for another.

Here is the old "daughter" board inside the radio just prior to removal:

And this is the gap - this picture was taken to ensure I could remember where the old board wired into the main board - re-fitting being the reverse of removal!

So here is the new daughter board which includes the 70MHz pre-amp just being tacked into place:

And here with the wiring complete:

All I need to do now is find a suitable signal and peak the variable inductor for maximum smoke; that should be a doddle. I can hear the relays operating as the tuning range enters and leaves the operating frequencies, so something is working as planned.

Not bad, egh?

No comments:

Post a Comment