Characteristics of HP-IL Transformers?

[J-F Garnier]

I don't recall the HP-IL transformer specifications have ever been published or measured.

The turns ratio is known (3:1 for output, about 1:4 for input in two stages) and adapts the +/-1.5V amplitude of the HP-IL signals to the 5V digital levels of the HP-IL chip.

I had the project to experiment with pulse transformers on the PIL-Box, maybe this is what you have in mind too, but didn't do it yet (too many projects...).

J-F