Old Transformer Question

[decoder]

Hello.

I have this old transformer and have no idea what it is. Does anyone here know what this is?

Thanks

 

[Jon Snell]

My guess is a power transformer supplying 350 volts AC, possibly a 6.3v and 5v heater tapping.
Without the core size and winding diameter a guess at the wattage cannot be acheived.

Edit; If the core size is around 1" then expect about 100V/A
50V/A HT and 50V/A heaters

 

[Shaun70]

,,,

 

[decoder]

My guess is a power transformer supplying 350 volts AC, possibly a 6.3v and 5v heater tapping.
Without the core size and winding diameter a guess at the wattage cannot be acheived.

Edit; If the core size is around 1" then expect about 100V/A
50V/A HT and 50V/A heaters

Thanks. Do you think the 4-65 stamp is the date it was made? I have tried to search for PF151 but found nothing regarding who made it etc.

 

[Jon Snell]

Quite likely April 1965 is the date of manufacture. Could it be this one?
If the secondary voltage was measured off load and with a high mains supply, it could be this one.

Edit; more info added ...

 

[decoder]

That's great, thanks.