[Heathkit] SB-1000 Tuning/Loading Capacitor Issue

[Rick Markey, KN3C]

Sorry,  I didn't realize I couldn't post photos to the list.  If anyone 
wants to see my photos, drop me an email at my QRZ address and I'll pass 
them along!

Rick, KN3C


On 11/13/2021 16:11, Rick Markey, KN3C wrote:
>
> I fired up my faithful SB-1000 the other day, only to discover that 
> the loading capacitor did not appear to be working.  After removing 
> the cover and looking for the cause, I discovered that when I rotated 
> the loading control clockwise, the capacitor would move.  However when 
> I rotated the loading control in the opposite direction, the capacitor 
> would not move.
>
> Here's what I found:
>
>
>
>
>
> There is a 1/4" OD nylon shaft that is pressed onto the end of both 
> the loading and tuning capacitors, which have been turned down and 
> splined. The end of the nylon shaft that fits into the ball drive on 
> the front panel is solid.
>
>
>
> My tuning capacitor worked fine, but the nylon shaft was also split so 
> it was only a matter of time before it failed.  My fix is to slide a 
> shaft coupler over the broken connection.
>
>
>
> If you have an SB-1000, you will most likely run into this problem at 
> some point.  The nylon shaft does not appear to be a replaceable 
> part.  I don't understand why a shaft coupler wasn't used originally.  
> It would seem to be a better design and cheaper than manufacturing the 
> capacitors with the splined end?
>
> Rick, KN3C
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