[Wendymott]

Hi Peeps. While making the FM Modulator for my 2M multimode transceiver, I realised I couldnt test the quality of the modulation with what I have here. I have the FRG7, but in its original form has no FM facility. My modulator is at 10.81 Mhz. So I decided to dust off a TBA120U and try that.
The greatest difficulty was getting the tank coil to the correct frequency, but to cut a long story short "mercifully" the eventual value was 150 uH .
There is plenty of room in the FRG7, so it was just a case of hooking it up. I fitted a AF select relay onboard. Connecting the filter to the last I.F secondary before the detector device, slightly reduces sensitivity, however in my case its no real hardship.
Eventually I may need a FM deviation meter, but until then... "ittl do"