BEST car radio ever? From a junkyard 1956 Buick ... ran it in the house
using a jumper in the vibrator socket, fed with filament xfmr circa 1965.
LONG warrrrr aerial ..
Had the speaker built in .. what a sound.
Radio Tokyo pounded in nightly ..
73, Mark AA6DX
----- Original Message -----
From: <dgsvetan@rockwellcollins.com>
To: <rfi@contesting.com>
Sent: Wednesday, May 05, 2004 7:34 AM
Subject: Re: [RFI] BPL Protest Opportunity? & BC-AM Ant Improvement?
>
>
>
>
> Mike and Doc,
>
> I agree that factory radios are actually very good sets (possible
exception
> being the very bottom end units). In 1999, I spent more than a month at a
> factory where auto radios were the main production item. (My company was
> providing an EMC test chamber to the radio manufacturing company and I was
> responsible for system integration.) I can tell you that the factory
> radios get extensive EMI/EMC testing. I have to presume that they contain
> components to resolve RFI issues - I never saw any schematics while I was
> there. However, hard to pass the tests if the units aren't designed
right.
>
> Back in the days when car radios where more option than standard issue, a
> car radio cost a fair number of bucks compared to what you could find at
> the local department or appliance store. Performance costs - and in car
> radios, they don't have to make anything other than the front panel look
> nice. Sure, aftermarket sets generally cost less than the factory radio,
> but it is probably a fair guess that you are getting a lot less. These
> radios seem to emphasize gadgets and lots of audio power output. I'll bet
> it's a real "blast" when a 500 watt car stereo is in a vehicle that is
> passing an 18 wheeler and the trucker signs with "10-4, Good Buddy" while
> running his 500 watt "flamethrower".
>
> One of my favorite customer calls was from an engineer at a car radio
(OEM)
> manufacturer. He said that his new radio design worked fine until the
> clock for the microprocessor was activated. My EMC advice to him was
> "leave out the clock". He had a poor sense of humor.
>
> Incidentally, despite what the faceplate of your car's radio says for a
> brand name ("Ford", "Chrysler", "Saturn", etc.), there is a pretty good
> chance that the car maker did not make that radio. The factory in which I
> spent several weeks working was owned by a non-automotive manufacturer and
> cranked out radios for at least three different major car names.
>
> 73, Dale
> WA9ENA
>
>
>
>
>
> "Michael Tope"
> <W4EF@dellroy.com To: <kd4e@arrl.net>,
<rfi@contesting.com>
> > cc:
> Sent by: Subject: Re: [RFI] BPL
Protest Opportunity? & BC-AM Ant Improvement?
> rfi-bounces@conte
> sting.com
>
>
> 05/05/2004 04:37
> AM
>
>
>
>
>
>
>
>
> > More directly on-Topic for this RFI list, anyone
> > know of an add-on BC-AM preamp for the car? Or
> > a source for a better antenna (no room inside the
> > fender of my Chevy Astro van for a power antenna
> > with a long telescoping whip) -- perhaps a longer
> > fixed whip or a coil base that would electrically
> > lengthen the antenna without making it absurdly
> > tall?
> >
> > I am told that BC-AM tuner sections are junk in
> > all of the new radios and with the coming of
> > digital BC-AM there is no incentive to upgrade
> > the old analog technology. Meanwhile I'd sure
> > like to strengthen the initially captured signal
> > so the engine and environmental noise doesn't
> > drown-out the weak ones!
> >
> > Off to work ...
> >
> > --
> > Thanks! & 73, doc kd4e
> > West Central Florida
>
>
> I have always found factory radios (at least Fords)
> to have pretty good AM receivers. Most aftermarket
> car stereos seem to be absolutely awful, however.
>
> If your engine noise is radiated as opposed to
> conducted into your car radio, then using a
> preamplifier probably won't improve the
> signal-to-noise ratio because the noise will get
> amplified just as much as the signal. If the
> noise is conducted you may be able to
> filter the power leads going into your radio.
>
> I haven't looked into aftermarket BC band
> antennas, so I can't really offer anything
> valuable in that regard.
>
> 73 de Mike, W4EF..................................
>
>
>
>
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