Hello from England UK,
I’m looking for any electronic copies of the Racal MA4204 schematics. This is a 1970’s small green voice scrambler.
It wasn’t really used here in England UK, but I think it was sold and used in Canada and back in 2017, there was someone selling on Canadian ebay, CD’s with lots of Racal documentation including the MA4204 schematic diagrams.
It may just be possible that one of you chaps may have an electronic copy unknowingly amongst your electronic Racal documentation.
Please do get in touch if you have any documentation on this.
Many thanks,
Martin
M0MGA
https://www.vmars.org.uk/