[R-390] Balanced Antenna Connector

[Larry Haney]

Very sorry to hear about your loss, Amy.  Thanks for letting us know.  We
will remove his name as soon as possible.

Sincerely, Larry

On Thu, Oct 10, 2024 at 11:14 AM Kenneth Perales <kenperales at comcast.net>
wrote:

> 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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>> >>> >>
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