Delco 3206

7/18/2006 9:57:41 AMfrank goddard

Recently arrived Delco 3206 from the USA, and now stripped to its underwear on my bench. The push pull //ll output transformer (two pairs of 2 number) is open circuit secondary side. Does anyone have information regarding the technical and build specification of the transformer primary and secondary's. ie. resistances, working current,etc to feed UX48 tubes in double //ll.

Anode load is 15000 ohms per tube
Current is 56mA per tube
Anode voltage is 125v
Screen voltage is 100v

Above are correct characteristics for the tube but the radio is a farm Set designed to opperate at 32 volts appx.

Alternatively. Any other ideas to get the set away. Boy !!!!!!!!!!!!!!!!!

Many thanks Frank Goddard

7/18/2006 10:40:06 AMNorm Leal

Hi Frank

Quite a radio with 4 - 48's. Schematic can be found here:

http://www.nostalgiaair.org/PagesByModel/386/M0022386.pdf

The load would be reduced with 4 tubes. Date book load resistance is shown as 1500 ohms for a single tube. Current will be reduced due to 32 volts for B+. You can use a push pull output transformer designed for high current/low voltage tubes such as 50L6 or 6W6. Didn't find specific data showing 32 volt operation although the voltage was popular with 48's.

http://www.mif.pg.gda.pl/homepages/frank/sheets/021/4/48.pdf

Norm

:
:
:
:Recently arrived Delco 3206 from the USA, and now stripped to its underwear on my bench. The push pull //ll output transformer (two pairs of 2 number) is open circuit secondary side. Does anyone have information regarding the technical and build specification of the transformer primary and secondary's. ie. resistances, working current,etc to feed UX48 tubes in double //ll.
:
:Anode load is 15000 ohms per tube
:Current is 56mA per tube
:Anode voltage is 125v
:Screen voltage is 100v
:
:Above are correct characteristics for the tube but the radio is a farm Set designed to opperate at 32 volts appx.
:
:Alternatively. Any other ideas to get the set away. Boy !!!!!!!!!!!!!!!!!
:
:
:Many thanks Frank Goddard

7/18/2006 10:41:09 AMNorm Leal

That's load Resistance would be reduced with 4 tubes.

Norm

:Hi Frank
:
: Quite a radio with 4 - 48's. Schematic can be found here:
:
:http://www.nostalgiaair.org/PagesByModel/386/M0022386.pdf
:
: The load would be reduced with 4 tubes. Date book load resistance is shown as 1500 ohms for a single tube. Current will be reduced due to 32 volts for B+. You can use a push pull output transformer designed for high current/low voltage tubes such as 50L6 or 6W6. Didn't find specific data showing 32 volt operation although the voltage was popular with 48's.
:
:http://www.mif.pg.gda.pl/homepages/frank/sheets/021/4/48.pdf
:
:Norm
:
::
::
::
::Recently arrived Delco 3206 from the USA, and now stripped to its underwear on my bench. The push pull //ll output transformer (two pairs of 2 number) is open circuit secondary side. Does anyone have information regarding the technical and build specification of the transformer primary and secondary's. ie. resistances, working current,etc to feed UX48 tubes in double //ll.
::
::Anode load is 15000 ohms per tube
::Current is 56mA per tube
::Anode voltage is 125v
::Screen voltage is 100v
::
::Above are correct characteristics for the tube but the radio is a farm Set designed to opperate at 32 volts appx.
::
::Alternatively. Any other ideas to get the set away. Boy !!!!!!!!!!!!!!!!!
::
::
::Many thanks Frank Goddard

7/18/2006 11:53:03 AMBill VA

Frank, did you peel back some of the covering on the secondary to see where the leads connect? Sometimes, thru handling they break at point where thin secondary wire connects to lead.

Bill VA

:That's load Resistance would be reduced with 4 tubes.
:
:Norm
:
::Hi Frank
::
:: Quite a radio with 4 - 48's. Schematic can be found here:
::
::http://www.nostalgiaair.org/PagesByModel/386/M0022386.pdf
::
:: The load would be reduced with 4 tubes. Date book load resistance is shown as 1500 ohms for a single tube. Current will be reduced due to 32 volts for B+. You can use a push pull output transformer designed for high current/low voltage tubes such as 50L6 or 6W6. Didn't find specific data showing 32 volt operation although the voltage was popular with 48's.
::
::http://www.mif.pg.gda.pl/homepages/frank/sheets/021/4/48.pdf
::
::Norm
::
:::
:::
:::
:::Recently arrived Delco 3206 from the USA, and now stripped to its underwear on my bench. The push pull //ll output transformer (two pairs of 2 number) is open circuit secondary side. Does anyone have information regarding the technical and build specification of the transformer primary and secondary's. ie. resistances, working current,etc to feed UX48 tubes in double //ll.
:::
:::Anode load is 15000 ohms per tube
:::Current is 56mA per tube
:::Anode voltage is 125v
:::Screen voltage is 100v
:::
:::Above are correct characteristics for the tube but the radio is a farm Set designed to opperate at 32 volts appx.
:::
:::Alternatively. Any other ideas to get the set away. Boy !!!!!!!!!!!!!!!!!
:::
:::
:::Many thanks Frank Goddard

7/18/2006 1:45:33 PMFrank Goddard

Thanks fellas. Am working on your advice this evening.First strip the windings of the secondary? Then look for (if needed) a push pull that supplied 6W6's from my junk box. Hope I have one?

Frank Goddard. Doncaster England

:Frank, did you peel back some of the covering on the secondary to see where the leads connect? Sometimes, thru handling they break at point where thin secondary wire connects to lead.
:
:Bill VA
:
::That's load Resistance would be reduced with 4 tubes.
::
::Norm
::
:::Hi Frank
:::
::: Quite a radio with 4 - 48's. Schematic can be found here:
:::
:::http://www.nostalgiaair.org/PagesByModel/386/M0022386.pdf
:::
::: The load would be reduced with 4 tubes. Date book load resistance is shown as 1500 ohms for a single tube. Current will be reduced due to 32 volts for B+. You can use a push pull output transformer designed for high current/low voltage tubes such as 50L6 or 6W6. Didn't find specific data showing 32 volt operation although the voltage was popular with 48's.
:::
:::http://www.mif.pg.gda.pl/homepages/frank/sheets/021/4/48.pdf
:::
:::Norm
:::
::::
::::
::::
::::Recently arrived Delco 3206 from the USA, and now stripped to its underwear on my bench. The push pull //ll output transformer (two pairs of 2 number) is open circuit secondary side. Does anyone have information regarding the technical and build specification of the transformer primary and secondary's. ie. resistances, working current,etc to feed UX48 tubes in double //ll.
::::
::::Anode load is 15000 ohms per tube
::::Current is 56mA per tube
::::Anode voltage is 125v
::::Screen voltage is 100v
::::
::::Above are correct characteristics for the tube but the radio is a farm Set designed to opperate at 32 volts appx.
::::
::::Alternatively. Any other ideas to get the set away. Boy !!!!!!!!!!!!!!!!!
::::
::::
::::Many thanks Frank Goddard