The main thing with this scheme is the initial starting position of the dial
drum assembly. This gives you the reserve so you don't "run out of dial/drum
string" when actuating the band change mechanism. It's been several years
since I've done one of these receivers, but it shouldn't be too hard to
figure out, at least without a few tries. I don't know if the BAMA website
would have this information; the technical manual of this receiver is quite
a few pages.

Pete

"Yardleyite" wrote in message
...
Has anyone ever fooled around with the band change drum/pulleys with the
Collins 51J/R-388 series of receivers? It seems I've acquired a 51J-2 that
the
band is way off. Unfortunately, I do have a manwell, but have been able to
figure out a few things by myself.

The way it's working now, I have applied spring tension on the band drum.
It'll
go 180 degrees one way, then do an about face and go 180 degrees the other
way.
It seems the way I received it, the pressure spring came loose and was
riding
on the graticule!

Any information on how I can correctly align it will be greatly
appreciated.

Regards,
Joe Cro N3IBX