[R-390] Balanced Antenna Connector

[Kenneth Perales]

Please take my husband's name off your list of recipients: Ken Perales. He
died last week. His messages are coming to me now. Thank you. Amy Perales

On Thu, Oct 10, 2024, 9:02 AM Barry Scott <72volkswagon at gmail.com> wrote:

> Is that mod online somewhere?  I'd like to see it.
>
> Thanks,
> Barry - N4BUQ
>
> On Thu, Oct 10, 2024 at 5:20 AM Larry Haney <larry41gm2 at gmail.com> wrote:
> >
> > Hi again Barry,  You need a little more information about the twinax
> balanced ant connector mod.  Usually the antenna relay is disabled inside.
> This is due to the construction of the original relay - some of the relay
> contacts are supported and connected directly to the contacts on the
> original female twinax connector that was removed.  This normally disables
> the relay from functioning, This may not be a problem for you, but you
> should know how it is working.  Repairing the relay once modified like this
> is nearly impossible.
> >
> > Regards, Larry
> >
> > On Wed, Oct 9, 2024 at 11:53 PM Larry Haney <larry41gm2 at gmail.com>
> wrote:
> >>
> >> Hi Barry,  The connector in your picture is the old original twinax
> connector.  Somebody modified your 390 and changed the new twinax to it.
> It was used on the early sp-600s.  The male plug is available online and is
> known by the name ug-102, pl-284, Amphenol 83-22sp and 83-821.  Sorry I
> don't have any at the moment.
> >>
> >> Regards, Larry
> >>
> >> On Wed, Oct 9, 2024 at 2:00 PM Barry Scott <72volkswagon at gmail.com>
> wrote:
> >>>
> >>> Hi Larry,
> >>>
> >>> Those are the standard twin-ax connectors ("IBM"?).  I have one of
> >>> those but this connector is different.  See the pictures below.  Those
> >>> sockets appear to take a pin that's about 0.090" in diameter.  I just
> >>> don't recognize it.
> >>>
> >>> Thanks,
> >>> Barry - N4BUQ
> >>>
> >>> On Wed, Oct 9, 2024 at 3:04 PM Larry Haney <larry41gm2 at gmail.com>
> wrote:
> >>> >
> >>> > Hi Barry,  There are many manufacturers making the twinax male
> straight plug today for the balanced jack on the 390s.  There's Pasternack
> PE4104, PE-S330; ARC - 8-299, AMPHENOL - 82-5589-RFX, 162100; SPC
> Technology / SAMAR - SPC21084; Connex 162100; Pan Pacific TWX-3501; Aim
> Cambridge 27-9087, AIM 27-9080; AVA 403000 and others.
> >>> >
> >>> > If anyone would like one, I'll sell them an AVA 403000 for $3 +
> postage.
> >>> >
> >>> > Regards, Larry
> >>> >
> >>> > On Wed, Oct 9, 2024 at 11:21 AM Barry Scott <72volkswagon at gmail.com>
> wrote:
> >>> >>
> >>> >> What is the correct designation for the two-pin antenna connector
> >>> >> (balanced) in the R-390/URR (likely the same for the R-390A/URR but
> I
> >>> >> want to be specific just in case).
> >>> >>
> >>> >> Also, I think Chuck Rippel had a connection contraption that used a
> >>> >> resistor (or two) so that 50-ohm unbalanced would match just a bit
> >>> >> better using the balanced connection.  He had a website that
> depicted
> >>> >> that but I don't know if that still exists.  Anyone know?
> >>> >>
> >>> >> Thanks,
> >>> >> Barry - N4BUQ
> >>> >> ______________________________________________________________
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