I do have the -35 manual, just dug it out of my pile of TMs. Going through the steps now, hopefully something simple...
My R390 has the same issue it seems, so might learn a thing or two when I get to work on that one. On Fri, Oct 3, 2025, 09:29 Jacques Fortin <[email protected]> wrote: > Hello Adam, > Swapping the tubes is a good idea, but that do not insure that the 1st > Xtal oscillator is actually working... > You should try to measure if there is any signal on the V401 plate. > This being said, I do not own a R-392, but it is similar to a R-390/URR in > architecture. > Do you have a copy of the TM11-858 or the TM11-5820-334-35 ?? > > 73, Jacques, VE2JFE in Montreal > > -----Message d'origine----- > De : [email protected] <[email protected]> De la > part de Adam Morehouse > Envoyé : 2 octobre 2025 13:59 > À : R-390 Mailing List <[email protected]> > Objet : Re: [R-390] R-392 > > Managed to get the V401/V203 tubes out with a little bit of gorilla tape > as a puller. The silicone puller I bought just slips right off them... > > I swapped tubes, no changes. The switch seems to be working fine, when I > first start playing with this thing, if I tapped the chassis it would click > in the speaker, like a bad connection, etc. I took the bottom decks out, > and dropped the front panel and saw nothing obvious poking around. Now that > it's back together, its gone. > > A lot of the tubes do test "low" on my Heathkit TT-1 tube tester (TV-7 in > the pile of stuff to restore/calibrate). > > > V401 > > 1. -.3 / 118k > > 2. .01 / 8.4 > > 3. 5.8 / 6.2 > > 4. 11.38 / 10.3 > > 5. 21.9 / 1k > > 6. 21.9 / 1k > > 7. .013 / 8.4 > > V203 > > 1. 0 / 107k > > 2. 0 / 3.5k > > 3. 0 / .3 > > 4. 23.99 / 3.7 > > 5. 10.5v / 8.8M > > 6. .17 / OL > > 7. 23.15 / 2k > > > On Wed, Oct 1, 2025 at 8:08 PM Adam Morehouse <[email protected]> > wrote: > > > Hey guys, > > > > Doing a little tinkering between classes (18 credits is awful...). I > > decided to try out a R-392 that came with a T-195 I bought this summer. > > It's nice and clean inside, no obvious defects - but is completely > > dead below 8MHz. Any idea where I should start my search when I dig into > this? > > > > Thanks for any help or pointers... > > > > Adam > > > ______________________________________________________________ > 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
