I recently was given a Philco 39-71 portable,
it had this transformer laying loose inside.
It was not hooked up. On the ID plate it says "For sets
using 4,5,or 6 1 1/2 volt tubes" 110-120v 50-60 cycles.
Made by General Transformer Corp. Chicago Ill.
It has several receptacles for the battery plugs. Any help
with instructions or suggestions how to determine where
to check for proper voltage, or a source for a manual
would be appreciated.

Hi Jerry

You have a transformer that is used in a battery eliminator for portable radios. It may be part of a unit that has capacitors and rectifier. It should also have a 90 volt output.

Could you actually have the complete power supply? Your radio requires DC filament and B+ voltage. The transformer alone only supplies AC.

Norm

: I recently was given a Philco 39-71 portable,
: it had this transformer laying loose inside.
: It was not hooked up. On the ID plate it says "For sets
: using 4,5,or 6 1 1/2 volt tubes" 110-120v 50-60 cycles.
: Made by General Transformer Corp. Chicago Ill.
: It has several receptacles for the battery plugs. Any help
: with instructions or suggestions how to determine where
: to check for proper voltage, or a source for a manual
: would be appreciated.

Norm,
I have the whole transformer. It has six receptacles on the back that it looks like the plugs that would go in the batteries fit. It has an AC cord to plug it into household voltage. It also
has a recptacle that looks like an octal plug for a tube. The only instruction on the front shows two positions for a bar to change from 4&5 tube sets to a 6 tube set. It appears to me to be intended
to replace the battery. It is a manufactured unit enclosed in a black metal case.

: Hi Jerry

: You have a transformer that is used in a battery eliminator for portable radios. It may be part of a unit that has capacitors and rectifier. It should also have a 90 volt output.

: Could you actually have the complete power supply? Your radio requires DC filament and B+ voltage. The transformer alone only supplies AC.

: Norm

: : I recently was given a Philco 39-71 portable,

: : it had this transformer laying loose inside.

: : It was not hooked up. On the ID plate it says "For sets

: : using 4,5,or 6 1 1/2 volt tubes" 110-120v 50-60 cycles.

: : Made by General Transformer Corp. Chicago Ill.

: : It has several receptacles for the battery plugs. Any help

: : with instructions or suggestions how to determine where

: : to check for proper voltage, or a source for a manual

: : would be appreciated.

Jerry

Sounds like you have the complete power supply. They usually have a rectifier tube. Is there an octal plug or could it be a socket for a tube? Some of these units use a 5Y3 or other tube. Are there any other wires leaving the unit.

Your radio needs 1 1/2 volts for the filaments and 90 volts for the high voltage supply. Even though your radio had 4 tubes, the 1C5 counts as two as it has a double filament. The unit should be set up for 5 tubes.

Measure voltages leaving the unit and see if you can find 90 volts and something around 1 1/2. They will read high as without the radio there isn't a load.

Norm

: Norm,
: I have the whole transformer. It has six receptacles on the back that it looks like the plugs that would go in the batteries fit. It has an AC cord to plug it into household voltage. It also
: has a recptacle that looks like an octal plug for a tube. The only instruction on the front shows two positions for a bar to change from 4&5 tube sets to a 6 tube set. It appears to me to be intended
: to replace the battery. It is a manufactured unit enclosed in a black metal case.

: : Hi Jerry

: : You have a transformer that is used in a battery eliminator for portable radios. It may be part of a unit that has capacitors and rectifier. It should also have a 90 volt output.

: : Could you actually have the complete power supply? Your radio requires DC filament and B+ voltage. The transformer alone only supplies AC.

: : Norm

: : : I recently was given a Philco 39-71 portable,

: : : it had this transformer laying loose inside.

: : : It was not hooked up. On the ID plate it says "For sets

: : : using 4,5,or 6 1 1/2 volt tubes" 110-120v 50-60 cycles.

: : : Made by General Transformer Corp. Chicago Ill.

: : : It has several receptacles for the battery plugs. Any help

: : : with instructions or suggestions how to determine where

: : : to check for proper voltage, or a source for a manual

: : : would be appreciated.

Norm,
The octal plug is a tube socket, sorry wrong terminology. When I get a chance I'll measure for the correct voltages and try it out. Im assuming if I dont get any readings I'll need to put in the rectifier tube, I have one in my spares.
There are no other wires leaving the unit.
Thanks for your help! Jerry

: Jerry

: Sounds like you have the complete power supply. They usually have a rectifier tube. Is there an octal plug or could it be a socket for a tube? Some of these units use a 5Y3 or other tube. Are there any other wires leaving the unit.

: Your radio needs 1 1/2 volts for the filaments and 90 volts for the high voltage supply. Even though your radio had 4 tubes, the 1C5 counts as two as it has a double filament. The unit should be set up for 5 tubes.

: Measure voltages leaving the unit and see if you can find 90 volts and something around 1 1/2. They will read high as without the radio there isn't a load.

: Norm

:
: : Norm,
: : I have the whole transformer. It has six receptacles on the back that it looks like the plugs that would go in the batteries fit. It has an AC cord to plug it into household voltage. It also
: : has a recptacle that looks like an octal plug for a tube. The only instruction on the front shows two positions for a bar to change from 4&5 tube sets to a 6 tube set. It appears to me to be intended
: : to replace the battery. It is a manufactured unit enclosed in a black metal case.

: : : Hi Jerry

:
: : : You have a transformer that is used in a battery eliminator for portable radios. It may be part of a unit that has capacitors and rectifier. It should also have a 90 volt output.

:
: : : Could you actually have the complete power supply? Your radio requires DC filament and B+ voltage. The transformer alone only supplies AC.

:
: : : Norm

: : : : I recently was given a Philco 39-71 portable,

: : : : it had this transformer laying loose inside.

: : : : It was not hooked up. On the ID plate it says "For sets

: : : : using 4,5,or 6 1 1/2 volt tubes" 110-120v 50-60 cycles.

: : : : Made by General Transformer Corp. Chicago Ill.

: : : : It has several receptacles for the battery plugs. Any help

: : : : with instructions or suggestions how to determine where

: : : : to check for proper voltage, or a source for a manual

: : : : would be appreciated.