"N_Cook" wrote in message
...
For appearance and modern day use in a vintage vehicle.
That is adding an FM IC inside somewhere rather than RF converter plugged in
aerial socket.
Assuming there is somewhere around the volume control to switch out the AM
and switch in an FM IC o/p audio . How to secrete that switch and a step
through the band switch as channel changer.
Maybe possible to change the LW/MW switch to MW/FM and if some part of the
dial scale is flexible then hide a switch behind that.
Any other ideas without affecting the external appearance of the original?
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
I don't think adding a single IC is going to give you what you want... instead,
I'd look at a complete FM receiver. Take a look at the Velleman FM receiver kit
at
http://www.vellemanusa.com/us/enu/pr...iew/?id=351280. There is a link
to the "manual" for the kit that shows the schematic. Considering that an FM
radio needs a few tuned circuits, building your own might be a bit more than you
want to tackle.
There are a few gotchas in this approach... no frequency display is the main
drawback. But since the tuning appears to be via a small pot, you could draw
one and fix it to the dash. Just tap into the appropriate power, volume,
tuning, etc. on the board and bring them out to the dash. You can buy a copy of
this kit at
http://www.bgmicro.com/index.asp?Pag...D&ProdID=11929.
If you want to go very cheaply, look at the little receiver at
http://www.goldmine-elec-products.co...?number=G15657. It looks very
similar to a little receiver that I was given at a trade show a few years ago.
Major problem with this unit is that there is no tuning... it has a scan button;
it scans the FM band from low end to high end.
Just locate the power connections, volume control and scan button, bring them
out to the dash panel, and you're in business.
Hth,
--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)
Experience: What you get when you don't get what you want