Total posts : 45366
Yeah, I think there actually is a station left in
Chicago that goes daytime 690 to 680 at night.
I’ll have to check.
It was fun to build my frequency switch project.
The AMT-3000 had a relay across one of the
frequency changing dip switches. That made it
possible to go back and forth between 1690 and 1700.
I was lucky because it only took one jumper across one
dip switch. Open the dip switch and the relay takes it’s place.
The relay was controlled by a 12 volt power supply in the
DOGRADIO studio. That supply was on a multi-event timer.
A 12 volt line ran from in my house out to the SS TRAN AMT-3000
out in the backyard. Every month as the sunrise/sunset hours
changed, I adjusted the timer accordingly. It was so much fun
waiting for the thing to flip and then retuning the radio from 1700
to 1690, or visa versa.
What a blast.
If I ever get 1690 back on it will be a daytime only operation.
The plan is that the 1020 kHz carrier current would run 24 hours.