[Collins] Collins 62S-1 Transverter Downconversion Gain??

[Dr. Gerald N. Johnson]

That shaft is known as the bandswitch shaft. CPN 544-3138-002. A part 
made by Collins. It probably started out as a 1/4" diameter phenolic or 
fiberglass rod with the flats sanded or milled. The dimensions of that 
double flatted shaft were pretty much standardized by rotary switch 
makers. It could have come from some vendor in long lengths and Collins 
fabrication effort was to cut it to length and debur the cut ends. I 
just checked another rotary switch and the shaft was 1/4" (0.248") 
diameter with the flats 3/16" (0.187") apart.

For the nameplate, it probably involves the whole black escutcheon CPN 
553-5713-004 engraved 75S-3B. The only one I have loose is engraved 32S-3.

The radio will function without the tunable BFO, but not without that 
shaft except on one band. And then only if all the bandswitch contacts 
are in line.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 9/24/2010 9:37 AM, L D Ritta wrote:
>    Hello All
> I have a 75S3B which lack some parts, they are the name plate and L10
> coil 278-0319-010 and the shaft goes behind the crystal switch. If you
> can help please hollar.
>
> 73 Lee
>
> ______________________________________________________________
>