ROLA Audio Transformers

[W5FH]

Hello-
    Does anyone here have any technical info regarding the ROLA manufactured audio interstage transformer RC1205 and modulation transformer RC1206 as used in the BC-1158 WW2 VHF transmitter? I am considering using these and am very curious if anyone had any ROLA technical data? I know the RC1205 I/S is for matching the P-P plates of a 12SN7 to the P-P grids of an 815 modulator tube. I am very curious about the quality of this transformer in regards to audio bandwidth/frequency response and distortion; not many center tapped on both sides types show up. It appears pretty substantial in construction/weight.
     Also would like info on the RC1206 modulation transformer although it is known that it matches the P-P plates of an 815 on its primary and the B+ supply to an 815 RF power amp on its secondary.
Thanks,
Byron W5FH

[DMOD]

Hello-
    Does anyone here have any technical info regarding the ROLA manufactured audio interstage transformer RC1205 and modulation transformer RC1206 as used in the BC-1158 WW2 VHF transmitter? I am considering using these and am very curious if anyone had any ROLA technical data? I know the RC1205 I/S is for matching the P-P plates of a 12SN7 to the P-P grids of an 815 modulator tube. I am very curious about the quality of this transformer in regards to audio bandwidth/frequency response and distortion; not many center tapped on both sides types show up. It appears pretty substantial in construction/weight.
     Also would like info on the RC1206 modulation transformer although it is known that it matches the P-P plates of an 815 on its primary and the B+ supply to an 815 RF power amp on its secondary.
Thanks,
Byron W5FH

These are the only references I could find.

https://worldradiohistory.com/AUSTRALIA/Archive-Australian-Radio-World/40s/Australasian-Radio-World-1949-09.pdf

https://nzvrshome.files.wordpress.com/2018/12/Rola-Catalogue-c1948.pdf

Maybe Pat has more data in his Bunker of Doom?

Phil - AC0OB