[Hallicrafters] SX-28 Dial Tracking

[Joe Connor]

I need some help. I picked up an SX-28 parts unit. It's too nice to part out so I'm going to restore it. The S-meter is missing but I'll worry about that later. I replaced the 'lytics and it's working on all bands. BCB (Band 1) is outstanding. The other bands are not so hot. I'm starting the slow process of replacing all paper caps and out-of-spec resistors. 

My initial problem is dial tracking. I get the sense a prior owner had a magic screwdriver. We all know what that means.

On Band 3, CHU comes in where it is supposed to but WWV comes in at 5.8 mHz. I can't adjust the trimmers to bring it to where it is supposed to be.

On Band 4, WWV comes in at 10.5. mHz. Again, i can't adjust the trimmers to bring it down.

Any ideas? It plays so well on BCB that I suspect it will be a great set once I get the RF alignment right. 


Joe Connor