If it was put in later, even if it had a vibrator it probably would not have
had a transistor in it. There were some car radios that worked iwth 12
volts on the plates of the tubes, except they could not make very much
audio power so a transistor or two were used in the audio output stage.
On Thu, 24 Dec 2015 22:04:22 -0500, "Ralph Mowery"
with solid state output (Hybrid) that used them either - and not all
"vibrator" radios were polarity agnostic either - There were quite a
few "vibrator" radios thay used the vibrator not only as the"inverter"
but also as the "rectifier" - they were called Synchronous Rectifiers
and did not require a rectifier tube or plate rectifier to make the
high voltage DC required for the plates.
Connect one of those to reverse polarity and the magic smoke got out
quite quickly (and was not easy or cheap to get back in!!!)
(and if the capacitor that tuned the transformer to "ring" at 115cps
failed, the points on the vibrator would cook in a matter af a very
few hours, instead of lasting for 20 or more years!!!)
So it just repolarized by itself.... ????
That comes as a surprise. I'd think that something would overload and
burn out, most likely the regulator or the wire going to the battery.
I wonder what would happen if I just reversed the leads on my battery?
NO, I'M NOT GOING TO TRY IT!
Actually, I already got a Delco Alternator from an old junked truck
sitting on my bench, and I talked to the guy at the machine shop about
making me a bracket next week. This tractor is to be used, not shown for
it's antique value. So I'm getting rid of that troublesome generator.
I'll save the old generator. If I ever sell the tractor, it will go with
it (if the buyer wants it). I'll just leave the regulator and it's
wiring there, (and not used), and I'll run completely new wiring from
the alternator to the "system".
I guess I will try to drain the battery and repolarize it. Although it
still held a charge quite well, it's got some years on it, so if I have
to replace it, I will. At this point, I'm more curious if I can
repolarize it than anything else.
I've seen some strange things happen - particularly "down on the farm"
(and yes, several of my years working with batteries were with a farm
equipment dealer - and I worked on the farm for a few years prior to
On 12/23/2015 02:06 AM, firstname.lastname@example.org wrote:
Tractors are rugged :) It certainly isn't optimal but there isn't that
much that can go wrong on an old tractor. probably the only thing that's
solid state is the rear axle. The ammeter, if it even has one, would
read backwards. The capacitor in the distributor isn't electrolytic so
it wouldn't care.
I dimly remember an old test where you would hold the point of a lead
pencil between a spark plug wire and ground to see which way that was
going but I don't know if that would even be noticeable on a tractor.
The theory was the center electrode of the plug what physically hotter
than the shell and you wanted the spark to jump from the center to the
shell. Reverse the coil leads and it would go the other way.
On Wed, 23 Dec 2015 03:10:17 -0000 (UTC), "M. Stradbury"
I don't think so. It could lower a 12v battery to 10 volts or less,
but a 12 volt charger woldn't spark that much tryhing to charge a
battery that was putting back 8 or 10 volts.
Anyhow, he should get a meter and measure the voltages.
On 12/22/2015 07:08 PM, email@example.com wrote:
This is a long shot. Do you have a meter to verify the positive terminal
is in fact positive? It's rare but it is possible to reverse the
polarity on a discharged battery by connecting it backwards.
It's the farm tractor part that makes me suspicious:
Like I said, it's a long shot that the entire system might have been
On Wed, 23 Dec 2015 03:06:12 GMT, " firstname.lastname@example.org"
It looks like we have an idiot are at play here, using other people's
user names, and posting using some unknown newsreader called News Rover
But I guess when you live in some slum in Central Texas, have no friends
or social life, belong to a religious cult, and are not capable of
getting an erection, you spend all your time on newsgroups stalking
people and posting off topic rubbish!
Oh well, back to regular programming.....
On 23-Dec-2015, email@example.com wrote:
I have a pretty good thing going on in this newsgroup. I contribute a lot
and I get along with everyone really well. I don't want it to end.
It feels good to talk about things with other people who share
my interests. I help others when I can. And other people help me when
they can. It feels good. I want things to stay as they are right now. But only
time will tell.
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