On Jun 6, 3:05*am, "N_Cook" wrote:
DaveM wrote in message

. ..



"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
athttp://www.vellemanusa.com/us/enu/product/view/?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

I should have said retaining the original in working order but just adding
in somewhere, the guts from one of those matchbox size fm radios. No display
just 2 buttons on/off and channel step and an earpiece. Maybe requiring some
buffering or something to drop it in the existing (mono of course)
amplifier. Preferably no holes drilled through the front pannel.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list onhttp://home..graffiti.net/diverse:graffiti.net/- Hide quoted text -

- Show quoted text -- Hide quoted text -

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Surely the real fun is to use the FM to AM converter Rx so that yiou
can listen to the "old 'un". I use my AMT3000 Tx the same way at
home. Feed it with a s/s FM tuner and listen on one of several
refurbished AA5's and AC-only sets to "exercise" them - the converter
tube, IF amp and det/AF and OP tube all a-pumpin' away! g
Cheers,
Roger