[TechAssist] Re: GE reproduction cathedral AM/FM radio, model 7-4100JA, need voltage of AC transformer
- From: gulftech@xxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 11 Jul 2003 09:44:52 -0500
Kevin,
Is the secondary winding center tapped? What kind of power supply does
it use--full wave or half wave. Since it uses 16 volt filters, a good
guess would be about 12 vdc supply. If you were to use a 12VAC
transformer, rectify & filter it, you would have close to 18VDC. Too
much! Just use a bench supply across the main filter. Start at 6VDC,
increase up to 12 and test the radio.
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32563
850-934-8324 (Voice) 850-932-0819 (Fax)
On Fri, 11 Jul 2003 01:30:29 -0700 Kevin <kevintv@xxxxxxx> writes:
> This is just a radio with a simple AC transformer. The output is most
> likely 6-12 volts AC. The caps on the board are 16 volt and 10
> volt.
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of
> dennis@xxxxxxxxxxxxxxxxx
> Sent: Friday, July 11, 2003 1:23 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: GE reproduction cathedral AM/FM radio,
> model
> 7-4100JA, need voltage of AC transformer
>
> Usually what I do is check if it is battery operated. if it is
> battery
> operated. then the output of the battery is equal to the output of
> the
> transformer's secondary.
>
> but if this is clock radio. there are many output voltage. I just
> rewind
> the transformer primary coil.
> sometimes the primary is not really open, there is internal fusible
> in
> the
> transformer, try to check if there other transformer primary pins.
>
> Dennis Co
> dennis@xxxxxxxxxxxxxxxxx
> ACT Electronic Center
>
> ----- Original Message -----
> From: "Kevin" <kevintv@xxxxxxx>
> To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
> Sent: Friday, July 11, 2003 3:21 PM
> Subject: [TechAssist] GE reproduction cathedral AM/FM radio, model
> 7-4100JA,
> need voltage of AC transformer
>
>
> > Does anyone know the output voltage of the transformer in this GE
> radio?
> > The primary is open. Thanks.
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
> >
>
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