Silvertone 1725

10/4/2007 9:12:11 AMjohn

I just got this Silvertone console Model 1725 and the power transformer is bad. What would the specs. be for a replacement?

10/4/2007 11:55:16 AMNorm Leal

Hi John

Sears 1725 Power transformer has 4 secondary windings. You need 5 volts @ 2 amps for the rectifier (83V). You need 2.5 volts @ 3 amps for 45 tubes. Other tubes require 6.3 volts @ 1.5 amps or more.

High voltage should be around 350-0-350 @ 70 ma or more. DC output is shown as 390 volts. Voltage on this winding isn't critical. 300-0-300 will be ok.

http://www.nostalgiaair.org/PagesByModel/733/M0016733.pdf

Thransformers with 2.5 and 6.3 volt windings aren't common. Might find something at PTOP? Here is their list:

http://www.oldradioparts.com/2a23efl.txt

Norm

:I just got this Silvertone console Model 1725 and the power transformer is bad. What would the specs. be for a replacement?

10/4/2007 6:25:46 PMjohn

:Hi John
:
: Sears 1725 Power transformer has 4 secondary windings. You need 5 volts @ 2 amps for the rectifier (83V). You need 2.5 volts @ 3 amps for 45 tubes. Other tubes require 6.3 volts @ 1.5 amps or more.
:
: High voltage should be around 350-0-350 @ 70 ma or more. DC output is shown as 390 volts. Voltage on this winding isn't critical. 300-0-300 will be ok.
:
:http://www.nostalgiaair.org/PagesByModel/733/M0016733.pdf
:
: Thransformers with 2.5 and 6.3 volt windings aren't common. Might find something at PTOP? Here is their list:
:
:http://www.oldradioparts.com/2a23efl.txt
:
:Norm
:
::I just got this Silvertone console Model 1725 and the power transformer is bad. What would the specs. be for a replacement?

10/4/2007 6:25:47 PMjohn

:Hi John
:
: Sears 1725 Power transformer has 4 secondary windings. You need 5 volts @ 2 amps for the rectifier (83V). You need 2.5 volts @ 3 amps for 45 tubes. Other tubes require 6.3 volts @ 1.5 amps or more.
:
: High voltage should be around 350-0-350 @ 70 ma or more. DC output is shown as 390 volts. Voltage on this winding isn't critical. 300-0-300 will be ok.
:
:http://www.nostalgiaair.org/PagesByModel/733/M0016733.pdf
:
: Thransformers with 2.5 and 6.3 volt windings aren't common. Might find something at PTOP? Here is their list:
:
:http://www.oldradioparts.com/2a23efl.txt
:
:Norm
:
::I just got this Silvertone console Model 1725 and the power transformer is bad. What would the specs. be for a replacement?

10/4/2007 6:27:23 PMjohn

Thanks Norm, I will look on PTOP

::Hi John
::
:: Sears 1725 Power transformer has 4 secondary windings. You need 5 volts @ 2 amps for the rectifier (83V). You need 2.5 volts @ 3 amps for 45 tubes. Other tubes require 6.3 volts @ 1.5 amps or more.
::
:: High voltage should be around 350-0-350 @ 70 ma or more. DC output is shown as 390 volts. Voltage on this winding isn't critical. 300-0-300 will be ok.
::
::http://www.nostalgiaair.org/PagesByModel/733/M0016733.pdf
::
:: Thransformers with 2.5 and 6.3 volt windings aren't common. Might find something at PTOP? Here is their list:
::
::http://www.oldradioparts.com/2a23efl.txt
::
::Norm
::
:::I just got this Silvertone console Model 1725 and the power transformer is bad. What would the specs. be for a replacement?