Alright, so the oscillator is working. I think my problem has to do with the PTO.
When I bought the T-195/GRC-19 it came with a tote of parts - I swapped the AF/IF/Crystal Calibrator decks out - made no difference. Then I swapped RF decks - no difference. I noticed the wiring harness for the big plug on the AF deck had some electrical tape, I unwrapped it and don't see any damaged wires, switches behind the front plate look clean, with no loose or broken wires. But it still makes noises when I gently tap around. I left it tuned to a nearby AM station and flipped the unit over, and it (kinda) came to life. Squealing, and awful sounding - tapping around with a screwdriver, primarily on the PTO seems to affect it the most. Anyone have experience with that? Here's a video.... https://photos.app.goo.gl/AZga9HyCqnJ1hyo18 On Fri, Oct 3, 2025 at 9:29 AM 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
