[Drake] R-4B mechanical question

[Mark Nace]

Jack,
If it is anything like the tr-3 brass couplers, there is an insert that is about 
3/4 inch long made from spring steel.  At each end, it is bent in the same 
direction about 20 degrees, about 1/8 inch from each end.  Maybe others have 
better dimensions than I have offered.  

73
Mark
N5KAE



----- Original Message ----
> From: Jack Antonio <scr287 at att.net>
> To: drake at mailman.qth.net
> Sent: Sat, April 28, 2012 12:50:48 PM
> Subject: [Drake] R-4B mechanical question
> 
> I'm bringing an R-4B back to life, and have a question
> about the selectivity switch and its shaft coupling.
> 
> The coupling from the shaft to the switch is a brass sleeve,
> but what is inside the sleeve to provide the tension? Mine
> is missing whatever insert there is, and am wondering if
> there is a replacement or workaround. So far I've tried brass
> shim stock, copper flashing, and a small bit of #20 solid wire,
> but nothing has been solid enough.
> 
> Thanks
> 
> Jack Antonio WA7DIA/4
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