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I re-aligned it and it is pretty good now, I think I shot myself in the foot when I recapped it, I moved a cap to a different ground location, as new caps have shorter leads, and it swung the cap close to the volume control, and crystal filter, which caused
interference while aligning the IF's,
When I found the source was at the cap, I reinstalled it to the original location, and lengthened the lead. This time when I aligned it came out much better, and it is at least usable. Thanks for your help!
From:[email protected] <[email protected]> on behalf of don Root <drootofallevil@...>
Sent:?Wednesday, March 19, 2025 1:12 PM To:[email protected] <[email protected]> Subject:?Re: [HallicraftersRadios] SX-62B alignment instructions ?
Scott, re? ?V8, I see it is called an FM limiter and AM detector, which is confusing; and now I see that the Plate and Screen voltage is switched by S1-BB? way over …so I believe V8 is switched to function between a FM limiter or an AM detector. The screen and plate voltage are both reduced [some books say 30 volts typical] for operation as a limiter. Perhaps you can measure that that band 5,6 FM ?reduces
? If not, it might have too much gain .? just a thought ? I started looking at the manual and saw that it has a Multiplex out phono jack. You might want to look/listen to the FM audio from there, which is before the switches, then you should know if the problem is in the limiter /discriminator or Not. Likely so, but better to narrow down with confidence. Seems to me, a sweep gen and scope might be needed,? but the usual? look and probe might reveal something ?
From:[email protected] [mailto:[email protected]]
On Behalf Of Scott Petersen via groups.io ? Hi Don, It looks like the area I'm having trouble with, I will study it for a while, I also have trouble with following the signal path. Thanks! going to spend some more time on it tomorrow., We just had corned beef and cabbage, overstuffed... Scott -- don??? va3drl |
