12-10-2009, 08:38 AM
Hey Sean, I too have a 48-482 and use it every day. My FM seemed to track OK so I left it alone. The FM 1000 alignment procedure was different depending what write up I looked at so I pretty much left it alone too. I would be concerned about making a gross change to coils in the VHF band. Even a slight repositioning of seemingly benign components can cause a change.
New subject: I wound up making a change for the sake of AM/ SW performance by adding a .01uf cap to the cathode resistors (180 ohm) of the 2nd and 3rd IF amps. This greatly increased the sensitivity. I don't understand why they are missing from the factory but it sure helped. FM still seems OK for local and distant stations.
I like Terry's trick with the ferrite and copper to determint tuning direction.
New subject: I wound up making a change for the sake of AM/ SW performance by adding a .01uf cap to the cathode resistors (180 ohm) of the 2nd and 3rd IF amps. This greatly increased the sensitivity. I don't understand why they are missing from the factory but it sure helped. FM still seems OK for local and distant stations.
I like Terry's trick with the ferrite and copper to determint tuning direction.
Dave Casazza
Keep em glowin and goin...
