🚀 go-pugleaf

Robert A. Sobczak <SOBCZAK@MAINE.MAINE.EDU> writes:

>In article <BzDEtE.K5K@bcstec.ca.boeing.com>, mce5921@bcstec.ca.boeing.com
>(Martin Emde) says:
>>
>>Does anyone know how to modify a Walkman FM Receiver such that it operates
>>over the 108-136Mhz frequency range (aircraft voice communication) or
>>know if this is even possible?
>>
>Yea, I do.

>First, go buy an AM radio that receives in that range, because that what
>aircraft radios transmit on.

Actually, I read an article a few years back in "Radio Electronics" that
told how to modify an FM receiver to do just this.  I did it, and it
works.  Unfortunately, I can't remember the specifics; however, it involved
adjusting some trimmer capacitors on the main tuning capacitor and decreasing
the inductance (by physically removing turns from) of the FM tuning
coil (which was identifiable because upon touching it, static would
come out of the speakers, and upon releasing it, the static stopped).

I'm not sure how it handled the AM/FM problem, but I do remember it was
addressed in the article.  (Perhaps that was the trimmer capacitor bit;
I really don't remember.)

Perhaps someone else can provide some more information.

Norman
norlin@mailhost.ecn.uoknor.edu