Anyone know the procedure for adjusting the calibrate pot on the Heathkit IM-12 harmonic distortion meter? I have a schematic but no user manual.
Tnx,
Jerry, W8UJX
jk.ashley@earthlink.net

Anyone have any experience with putting the Heathkit AT-1 transmitter on AM?   I used this little rig on CW during my novice days in the 50's and just want to play around with it.  I have a homebrew modulator that uses a pair of 807s so I have plenty of audio.  Want to use the AT-1 to drive a Ten-Tec Centurion amp to what ever power I can get out of the amp.  

Tnx,  Jerry  
 
jk.ashley@earthlink.net

I have a VFO assembly from a Heathkit SB-401 transmitter.  Can anyone tell me the value of the BIAS and B+ voltage?
Tnx, Jerry
jk.ashley@earthlink.net

Where can I find some FT-243 crystals for the 60 meter band?

Tnx, Jerry