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THE AM BULLETIN BOARD => Technical Forum => Topic started by: Carl WA1KPD on January 01, 2020, 07:16:44 PM



Title: Collins 75A2 Band Selector Alignment
Post by: Carl WA1KPD on January 01, 2020, 07:16:44 PM
My 75A2 band selector drum was way off alignment- It was in the blank area of the dial and would not move with the switch.
Opening it up, I discovered that the string/fishing wire had slipped of the drum on the bandswitch. I replaced it and now the entire thing is out by about a band. Do I adjust it with the set screw on the bandswitch pully, or the setscrews on the drum (hidden I think by a large spiral spring).
The manual is mute on the issue and a Google search did not help.
TIA
Carl


Title: Re: Collins 75A2 Band Selector Alignment
Post by: WBear2GCR on January 02, 2020, 10:19:47 PM
Setscrew on the drum is what I have done...

iirc, there is a section on stringing the front panel dial cord in the manual, but I don't know
exactly what it says or calls for.


Title: Re: Collins 75A2 Band Selector Alignment
Post by: MikeKE0ZUinkcmo on January 02, 2020, 10:58:14 PM
^^^^^^^^
What He said.


Title: Re: Collins 75A2 Band Selector Alignment
Post by: Carl WA1KPD on January 03, 2020, 01:28:32 AM
Thank you both!
Carl
AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands