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

[Doug Hensley]

Barry, I think you are RIGHT.  I do this kind of detail work so seldom my eyes stay dizzy.

The schematic is showing the wiring I think from the underside or solder side.  If that is true, and I don't have the IF deck in front of me, then the bent pin is not used.   I'll examine this in a little while and let everyone know.

A list member earlier suggested this but I was so determined to find the worse solution that I forgot the diagram and the connector pins might be on reverse sides.

QRX




Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.



________________________________
From: Barry <n4buq at knology.net>
Sent: Thursday, July 8, 2021 9:57 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

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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