View Single Post
  #10  
Old 10-16-2018, 11:52 AM
Josef's Avatar
Josef Josef is offline
VideoKarma Member
 
Join Date: Mar 2008
Location: Vienna
Posts: 133
Unwanted Effect Occurred

Even though I tried my best to implement the FM receiver as good and as professional as possible an unwanted effect occurred: Due to the fact that the FM receiver is permanently on as soon as the radio is switched on it was possible to receive the FM IF on shortwave
I want to Point out that this was not mentioned in the instruction manual of the FM receiver so I didn't think about it earlier.
After a little bit of I decided to build in another switch which turns off the FM receiver if the radio is operated on AM. This I realized with a dial string which wraps around the band selector axle and opens the contact on AM and closes it on FM mode.
Also this modification should look as authentic as possible like the rest of the radio. I only used old components from junk devices from the early 50ies I parted out some time ago except the dial string wich is new.

I hope I can call this project finished now
Attached Images
File Type: jpg 20181015_223842.jpg (60.7 KB, 20 views)
File Type: jpg 20181014_033257.jpg (41.8 KB, 19 views)
Reply With Quote
Audiokarma