Ken Scharf wrote in message . ..
I discovered a lot of pulse transformers. They appear to have primary
and secondary inductance of about 1.5mh and a ratio of 1:1ct

I wonder if they could be used as broadband rf transformers
to make homebrew diode ring mixers?

1.5mH doesn't make them sound very interesting for anything above very
low HF frequencies, if that, and would be too low for AF where 1.5mH
at 1kHz is only about 8 ohms reactance. They might be pretty good for
isolated driving of mosfet gates at a few tens of kHz. You should be
able to find their self-resonant frequency, and my guess is it will be
in the vicinity of 2MHz. You probably don't want to try to use them
above their SRF.

Do you have a manufacturer's part number? Can you look up what they
are recommending them for?

Cheers,
Tom