[R-390] Damaged Pins on Z221 and Z214

[Jim Whartenby]

Barry
I have an organ donor R-390/URR that is missing most of the coils but it does have Z219, Z220 & Z221 still in place but missing the ferrite slugs and racks.
Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy 

    On Friday, September 13, 2024 at 09:46:11 PM CDT, Barry <n4buq at knology.net> wrote:   

 After thinking about it a while, I'm wondering if I can remove the "riveted" top from that unused center pin on Z221 which would release that spring-fingered mechanism from that pin.  If so, I could move that to the pin that is used and then peen that center part where it would mushroom over the spring fingered part.  There's not much left of the center part that can be "mushroomed" so that might not work; however, I could also drill a tiny hole in the end of that pin and drive tiny rivet-shaped pin in that could hold the spring fingered part in place.  Tedious and fraught with problems but, aside from finding a replacement, it might be my best bet.

Barry - N4BUQ

> (Resending using plain text.)
> 
> I started reassembling the coils in the RF deck of my R-390 and discovered some
> damage the one of the pins on Z221 (upper left pin in the first image
> attached).  The spring contact assembly is missing entirely.  I notice that the
> center pin is not connected inside the housing but I think it would be a
> significant effort to try to remove both pins and replace the bad one with the
> good one.
> 
> When I disassembled Z214, I noticed one of the small fingers had broken off
> (second image attached).  The finger was left where the coil plugs in and I
> saved the finger.  I may have rocked the can just a little too much (it was
> very difficult to remove) and that may have broken that finger.  While I think
> that pin will still make sufficient contact, I may still try to solder that
> finger in place.
> 
> What are my possible options for Z221?  I presume there's not a stash of those
> coils (Z219, Z220, Z221 as I think they're all the same?) somewhere.  Any
> ideas?
> 
> Something tells me the combination of the broken slug I repaired and getting
> Z221 properly connected (and a fresh alignment) will make quite a difference
> for this radio.
> 
> Thanks,
> Barry - N4BUQ
> 
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