[TechAssist] Re: CarRadio,GM mod#986668,manf1953,DOA

  • From: "teltek3" <teltek3@xxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Tue, 11 Feb 2003 22:09:05 -0500

Good memory..Ty.

-Ed-
.
Tel-Tek Electronics
Ontario-Canada

teltek2@xxxxxxxxxxxx
----- Original Message -----
From: "Tiberius Kraemer" <ty1k@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, February 11, 2003 6:49 PM
Subject: [TechAssist] Re: CarRadio,GM mod#986668,manf1953,DOA


>
> David,
> All jokes aside...
> The "Vibrator" in fact was a device not unlike the old doorbell. You
know...
> Power applied to an electromagnet trough a contact, which opens when the
> magnet draws a spring loaded iron bar toward it. When the bar traveled a
> certain distance, the contact opened, the bar swinging away from the
> electromagnet, closing the contact again. and so on....
>
> In the "Vibrator" there is an auxiliary contact (Sometimes two
> contacts)which simply opens and closes as the bar swings.
>
> As in the new "DC to DC" converters, the "Vibrator" took the place of the
> transistor, (now days MOSFET). It takes a DC input source and "Chops" it
> into Pulsating DC (PDC) using the auxiliary contacts. This PDC is applied
to
> the coil of a transformer, and now you can step a voltage up or down.
>
> In the old tube type car radios, this voltage was stepped up and rectified
> in a tube called the "OhZet4" to supply the Plate and grid voltages for
the
> tubes.
>
> The 0Z4 is a gas ionization, mercury vapor cold cathode tube rectifier.
They
> were used to reduce the current drain of car radios. (No filament
required.)
>
> If I remember correctly, Sylvania  spect the 0Z4 it at 300 volts AC per
> plate RMS, 90 milliamps max.
>
> Ty
>
> Tiberius Kraemer
> Blue Star Electronics
> 3312 Silverton Rd. NE
> Salem, Oregon, 97303-2753
> Phone: 503 391 1491
>
>
> ----- Original Message -----
> From: "David Lessard" <mrfixit@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, February 11, 2003 2:34 PM
> Subject: [TechAssist] Re: CarRadio,GM mod#986668,manf1953,DOA
>
>
> >
> > I must be too young. What is a vibrator?
> > Be nice....this is a legitmate question.
> >
> > David Lessard
> > 50 Harrison Street
> > Alexandria Electronics
> > Ontario, Canada
> > K0C-1A0
> > mailto:mrfixit@xxxxxxxxxxx
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of hartstv@xxxxxxxxxxx
> > Sent: Tuesday, February 11, 2003 5:11 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] CarRadio,GM mod#986668,manf1953,DOA
> >
> >
> > Buddy of mine is refurbishing his 1953 Chevy.Wants the orginal 6 VOLT
> radio
> > repaired.Yes it's a tube unit,with a vibrator.Checked the 6 volt
vibrator
> on
> > my old drugstore tube checker''MERCURY'' & it was good.All tubes except
> the
> > 6V6 o/p tube were ok.Replaced the 6v6,& a 1600vdc/.06 ufd across the
> > vibrator o/p contacts.Using my 10amp power supply set at 6vdc;This unit
> > draws 6.5 amps on turn-on,it came back to life & with the orginal
speaker
> > sounded great,only AM of course.Man,did that bring back the ''good old
> > days''.Cleaned up the wiring,oiled the push button mech,new dial lamp &
> this
> > good old unit ready for another 50 years.Sorry for the long post but had
> to
> > get this one in for the archives.....regards...
> > Don of HARTS-TVCR-ASC
> > 9 Robert St,Oromocto,NB,Canada,E2V3N2
> > Tel-506-357-9785,Fax-506-357-6010
> > hartstv@xxxxxxxxxxx
> >
> >
> >
> >
> >
>
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