There was a guy who told me used the ovens power to run a R390 if deck and kept the ovens off. I have not verified that it’s plausible but he said he did it. Might be worth a look.
Sent from Yahoo Mail for iPhone On Thursday, October 31, 2024, 3:32 AM, Larry Haney <[email protected]> wrote: Hi All, Tom Marcotte made a nice post on this subject on Sun, 21 Aug 2005 16:14:25 -0700 (PDT). It's in the Pearls 'IF_Deck' section and titled 'R-725, How To Make Your Own'. This would be a good place to start and there are many other posts in there on this subject, also. Perhaps a document on this subject would be beneficial to put on our website, if someone would put one together. Tom, You had a number of links in your R-725 posts referencing 'geocities,com', but those seem to be gone now. Do you still have them somewhere? Thanks. Regards, Larry On Wed, Oct 30, 2024 at 5:38 PM Tom M. via R-390 <[email protected]> wrote: Perry, The added transformer in the R-725 was for PTO hum bucking, not filaments. sk Wally Chambers informed me of that fact. The R-725 had the rewired R-390 filaments. I've done this myself and wrote a procedure how to do it. I agree with you it was a bit of a PITA. I use the converted IF deck in my daily driver R-390A to this day. Tom On Wednesday, October 30, 2024 at 04:31:35 PM CDT, Perry Sandeen via R-390 <[email protected]> wrote: List, IIRC I've seen 3 published articles for r390a to r725 conversion all using the re-wiring of the R390 IF to 6 volt filaments. This seems to be a big PITA. When the military did the original they just added another 26 volt filament xformer. This seems a much easier approach especially when we have small SRPS's available. If anyone would have the schematics or TM addendum I would appreciate it if they would contact me off list. TIA Perry ______________________________________________________________ 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 ______________________________________________________________ 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
