开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育

avoid the mistake that I made


 

Maybe I should call this post "read the directions"!

After hooking up my BITX40 and turning it on, I noticed a couple of "problems". The volume control didn't do a very good job of adjusting the volume, and the tuning pot only seemed to let me cover a portion of the CW part of 40m (even after adjusting the VFO cap).

I decided to compare my wiring with the connection diagram on the hfsigs.com website (should have done this first) and noticed that the wire colors differed from what I had connected. I "assumed" that the red wire went to the wiper on both pots, but it is the brown wire that goes to the wiper. The red and black wires go to each end of the volume and tuning pot.

After correcting this error, and then swapping the red and black wires around so the volume increased when I turned the pot clockwise, everything worked! Now I can tune from about 7.020 to about 7.250 MHz.

73
AL - VE3RRD

Join [email protected] to automatically receive all group messages.