[AMRadio] Going to have to draw it, or maybe not...

CL in NC mjcal77 at yahoo.com
Sat Jul 22 00:23:09 EDT 2017

Does anybody have a schematic of the Heathkit HWA 17 FM transmit adapter? The schematic is no where on the internet.  If not, does anybody know if it is a reactance modulator or a phase modulator?

I bit the bullet and bought some of the Digikey 'crystals' that cost about $4 each, and you tell them what to program them for.  Must be a quick process, as I ordered them and got a shipping confirmation a few hours later.  This is an experiment to see if they can be made to work in vintage gear, I ordered a couple of them for HF and VHF, not considering what type of modulator the HWA17 actually is.  They should work fine with a phase modulator, but might require a bit more work for the other.  Will have to make up a little circuit board to mount the DIP style 4 pin chip to, hoping with a 5v B+, the output will be in the 2-4v P to P range and not need an amp.  We'll see... said the blind man to his deaf daughter.

Charlie, W4MEC in NC

More information about the AMRadio mailing list

This page last updated 20 Nov 2017.