[R-390] Question About the 20 Pin male bulkhead on the IF deck

[David Olean]

Hello Doug et al,

If you need to replace any busted connector pins, I have found that 
there is enough brass in the connector body to drill out a small hole 
and make a new pin that is 0.040" thick to install in the new hole. The 
technique is in the Pearls under "GENERAL RESTORATION" and dated around 
Sept 2019.  I repaired my connector and you cannot tell it was ever 
broken.  In my case, the pin was used, so it had to be repaired or the 
whole connector replaced.  I needed a drill press and a metal lathe 
unless you can find 0.040" brass wire.

Dave K1WHS

On 7/8/2021 10:57 AM, Barry wrote:
> If the drawing shows the connector from the underside (I can't tell which way it's represented), then it appears the bent pin is Pin 1 which isn't connected.  Again, though, I can't tell if that's Pin 1 or Pin 2.
>
> Thanks,
> Barry - N4BUQ
>
> ----- Original Message -----
>> From: "Doug Hensley" <w5jv at hotmail.com>
>> To: n4buq at knology.net
>> Cc: "Collins R-390 HF Receiver List" <r-390 at mailman.qth.net>
>> Sent: Thursday, July 8, 2021 9:49:47 AM
>> Subject: Re: [R-390] Question About the 20 Pin male bulkhead on the IF deck
>>
>> Yep, I'm nailed.  Thanks for the prompt Steve.  See attached.  Looks like two
>> wires
>> (red/white) are coming up on it.  But, the thought of changing the connector
>> makes the
>> heart burn even worse 🙁 ....  I used to have a small "micro torch", a little
>> handheld
>> butane thing.  If I can find it, that would make quick work of heating a
>> point on the pin,
>> at the risk of melting down the base molded plastic of course.
>>
>> Wife did give me one option:  "Quit complaining and just throw that old thing
>> away!" ...
>>
>> Doug W5JV
>>
>>
>>
>> Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.
>>
>>
>>
>> ________________________________
>> From: Steve Carter <kd0pxx at gmail.com>
>> Sent: Thursday, July 8, 2021 9:30 AM
>> To: Doug Hensley <w5jv at hotmail.com>
>> Cc: Collins R-390 HF Receiver List <r-390 at mailman.qth.net>
>> Subject: Re: [R-390] Question About the 20 Pin male bulkhead on the IF deck
>>
>> Hi Doug
>> IS that pin even hooked up?
>> If not, just cut it back?
>>
>> If you're going to bend it back, maybe heat it as you bend it.
>>
>> I had pins snap off, Sometimes you can just butt solder them back together...
>>
>> Of course the right way is to replace the connector. :-)
>> Steve
>>
>>
>> On Thu, Jul 8, 2021 at 9:04 AM Doug Hensley
>> <w5jv at hotmail.com<mailto:w5jv at hotmail.com>> wrote:
>> When I looked at the picture I took of the jumper that I need, I noticed
>> a damaged pin on the connector on the corner of the IF deck.  See attached.
>>
>> My memory, which is getting as bad as my old lawnmower seems to recall
>> the last time I tried to straighten a Collins connector pin, it broke off.
>> So,
>> armed with this indigestible memory, I'm wondering if heating it and putting
>> a light coat of solder might not give it a fighting chance?
>>
>> Any engineers out there with experience in this?
>>
>> TIA,
>>
>> Doug W5JV
>>
>>
>>
>>
>> Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.
>>
>>
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>>
>> --
>> Steve
>> KD0PXX
>>
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