Hello, I have learned why these audio interstage transformers go bad. 71A tubes can short causing excessive current drawn across these transformers. Is there any way a fuse or led or other item can be used to prevent the tubes from destroying these transformers?

Hi Sean

It would take a short between grid & plate of a 71A to put current through an audio interstage transformer. You could limit current to your 71A tube. Using a fuse rated .05 amps will work. Fuses with this ratings cost a couple dollars.

Most audio interstage transformers open due to corrosion. Unwinding a transformer often shows a green spot of corrosion.

Norm

:Hello, I have learned why these audio interstage transformers go bad. 71A tubes can short causing excessive current drawn across these transformers. Is there any way a fuse or led or other item can be used to prevent the tubes from destroying these transformers?

: hello was it a good idea to buy used transformers if they corrode

:Hi Sean
:
: It would take a short between grid & plate of a 71A to put current through an audio interstage transformer. You could limit current to your 71A tube. Using a fuse rated .05 amps will work. Fuses with this ratings cost a couple dollars.
:
: Most audio interstage transformers open due to corrosion. Unwinding a transformer often shows a green spot of corrosion.
:
:Norm
:
:
:
::Hello, I have learned why these audio interstage transformers go bad. 71A tubes can short causing excessive current drawn across these transformers. Is there any way a fuse or led or other item can be used to prevent the tubes from destroying these transformers?

Hi Sean

You are taking a chance with used audio interstage transformers. P-T156 from AES is new. Play Things Of Past also sells similar new transformers.

I wouldn't buy used Atwater Kent audio interstage transformers. Even if they have continuity often are noisy in the circuit.

Norm
:: hello was it a good idea to buy used transformers if they corrode
:
::Hi Sean
::
:: It would take a short between grid & plate of a 71A to put current through an audio interstage transformer. You could limit current to your 71A tube. Using a fuse rated .05 amps will work. Fuses with this ratings cost a couple dollars.
::
:: Most audio interstage transformers open due to corrosion. Unwinding a transformer often shows a green spot of corrosion.
::
::Norm
::
::
::
:::Hello, I have learned why these audio interstage transformers go bad. 71A tubes can short causing excessive current drawn across these transformers. Is there any way a fuse or led or other item can be used to prevent the tubes from destroying these transformers?