Hello Jerry, I do not believe that you can swap the R-390A mechanism into a R-390, as they are different. This is normal that the PTO still change frequency when you move the KHz tuning with the Zero Adj. fully in: they are linked at all times. This is the remaining of the gears that stops to move and the counter as well. I just checked with my own "non-A".
73, Jacques, VE2JFE in Montreal -----Message d'origine----- De : [email protected] <[email protected]> De la part de [email protected] Envoyé : 9 novembre 2024 14:25 À : [email protected] Objet : [R-390] Zero Adjust - not quite My R-390 electronically now seems to be workings quite well. The dial however is off 1.5kc and I cannot screw down the Zero adjust quite enough to make the VFO adjustment. Attached is a picture. I can see the brass gear move and the steel plate behind it move a fraction of an inch and the dial mechanism is very tight to finger movement but not enough and the VFO changes frequency despite the Zero adjust fully screwed CW. Also, the spring that I assume should provide some resistance when not screwed down seems to have lost its tension completely. I compared to the Zero adjust from a R-390A, also shown in picture. Can I swap the R-390A into the R-390? Jerry ______________________________________________________________ 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
