[R-390] Series 500 IF Module

[francesco.sartorello]

Gang, a few years ago Robert Downs sent me a copy of the 725 manual with all the variations to the original 500 module, including filament supply from a stock 390A, mail him!Ciao, FrancescoSent from my steam powered device!
-------- Messaggio originale --------Da: Larry Haney <larry41gm2 at gmail.com> Data: 27/05/24  17:26  (GMT+01:00) A: R-390 Forum <r-390 at mailman.qth.net> Oggetto: Re: [R-390] Series 500 IF Module Hi  Byron,  The 2 places I know of for R725 info is 'google 'R725 bama''and on R-390A Rebuild Part3 (radioblvd.com)<https://www.radioblvd.com/R390A_Rebuild_Part3.htm>.  Have fun.Regards, LarryOn Mon, May 27, 2024 at 6:46 AM Byron Tatum <bjtatum1 at att.net> 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:R-390 at mailman.qth.net>> This list hosted by: http://www.qsl.net> Please help support this email list: http://www.qsl.net/donate.html______________________________________________________________R-390 mailing listHome: http://mailman.qth.net/mailman/listinfo/r-390Help: http://mailman.qth.net/mmfaq.htmPost: mailto:R-390 at mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html