[R-390] Damaged Pins on Z221 and Z214

Barry n4buq at knology.net
Sat Sep 14 10:23:16 EDT 2024


Jim,

While I might try repairing the coil I have, I'd be interested in getting a replacement.  Can you let me know costs?  I private email is fine if you'd prefer.

Thanks!
Barry - N4BUQ

> 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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