Racal RA1792 NEW 1st LO board

Discussion in 'Radio Circuits, Repair & Performance' started by G8FCT, Dec 2, 2019.

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  1. G8FCT

    G8FCT Ham Member QRZ Page

    Hi I have a Racal RA1792 that had numerous faults that it had during the repairs I acquired a new 1st lo synthesizer board that has a AD80763 possibly from Analogue Devises? or a RMSL019/A the installed firmware does not support this board so is there any info on this IC around I may be able to modify the firmware to accommodate this board. I have now Disassembled the three ROMs and created a assembly file for this RX and have located the routine that controls the LO with serial data.
    I note that this board seems to have a strobe and 5 data bits I am assuming that one data bit is some sort of control bit and the remaining bits are the actual date but what is the sequence any info would be welcome. If any one wants a copy of the assembly file let me know no charge I am now working on a assembly file for a RA6790
    Robert Chadwick

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