Great, thank you, seems to be in congruence with the similar
Hammond-branded specs on the 269JX JD referred above, rated for 60mA
output with around 11 ohms primary DCR and 350 ohms on the secondary.
<
https://www.hammfg.com/files/parts/pdf/269JX.pdf>
A pretty nice piece for the price I think particularly given that I
should be able pick up several in person at the warehouse and avoid
shipping.
Only question I'm unsure of now is what format the program expects the
transformer "source resistance" parameter in; whether it's the
end-to-end secondary DCR plus the primary DCR referred to the secondary
directly, or whether that needs to take into account in a full-wave
center-tapped configuration that the load is only "seeing" half the
secondary impedance at a time, unfortunately the included Help manual is
not helpful here.