Hi, I can’t help you with the schematic you’re looking for. I assume you’ve seen Marcotte’s Electric Radio article on this conversion which is what I followed when I installed an R390 i.f. in my R390a. I found his article very complete step by step. The cabling and adapters for connection was the part that took some improvising because of the connectors I found available at the time. Dan
Sent from my iPad Air4 > On May 27, 2024, at 6:46 AM, Byron Tatum <[email protected]> wrote: > > Hello- I am considering converting an R-390 IF module to fit into an > R-390A mainframe. I have some info on this but have seen posts that a > schematic for the actual Servo Corporation Series 500 IF module exists. I > have searched for one to no avail. I was hoping to find this schematic to > compare it to the R-390 IF module and aid in the conversion. Also, I > would like to add any R-725 technical info that is available to my files here > in order to study. Will pay any costs incurred if copying is > required.Thanks all,Byron W5FH > ______________________________________________________________ > R-390 mailing list > Home: http://mailman.qth.net/mailman/listinfo/r-390 > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
