[R-390] R-390 Digest, Twinax and connectors

Sun Aug 24 17:00:03 EDT 2014

 A short time ago, I mentioned I had a quantity of Twinax cable jumpers with Amp connectors. The only taker was a nice chap from Australia. Although I cried when I cut the connectors off of the cable, the only other choice was $65 shipping, to send the whole thing to Oz.....

ron
N4UE

Oh yeah, these indeed come from Mother IBM

-----Original Message-----
From: r-390-request <r-390-request at mailman.qth.net>
To: r-390 <r-390 at mailman.qth.net>
Sent: Sun, Aug 24, 2014 1:55 pm
Subject: R-390 Digest, Vol 124, Issue 59

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Today's Topics:

   1. Re: Going to own a R390A soon. (Bob Camp)
   2. Re: Going to own a R390A soon. (Todd, KA1KAQ)
   3. Re: Going to own a R390A soon. (Roger Ruszkowski)
   4. Re: OT: (kinda) Nolan Lee web site and TV-10C/U
      (universal_comm at reagan.com)
   5. WANTED... (Pete Williams)
   6. RCA RBC Radio (Ted Breaux)
   7. Re: RCA RBC Radio (Roger Ruszkowski)

----------------------------------------------------------------------

Message: 1
Date: Mon, 18 Aug 2014 20:12:24 -0400
From: Bob Camp <kb8tq at n1k.org>
To: R-390-List list <r-390 at mailman.qth.net>
Subject: Re: [R-390] Going to own a R390A soon.
Message-ID: <83FE1060-6173-46E9-891C-FF1CF7C9AE55 at n1k.org>
Content-Type: text/plain; charset=iso-8859-1

Hi

IBM used the same connector in one of their early LAN setups. Both sides of the 
connector and the cable are relatively cheap if you do some digging.

Bob

On Aug 18, 2014, at 5:05 PM, Larry H <dinlarh at att.net> wrote:

> Hi Jerry,  The amphenol twinax connector 82-5589 alone is also available on 
ebay for $4.25 + $2.25 shipping.
> 
> Regards, Larry
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Message: 2
Date: Mon, 18 Aug 2014 20:44:24 -0400
From: "Todd, KA1KAQ" <ka1kaq at gmail.com>
To: Bob Camp <kb8tq at n1k.org>
Cc: R-390-List list <r-390 at mailman.qth.net>
Subject: Re: [R-390] Going to own a R390A soon.
Message-ID:
	<CANCs6AVQ4jwb4yywqCQbj=T+iH6+9WdjLB+3nUmPVbp26P70Pw at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

On Mon, Aug 18, 2014 at 8:12 PM, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> IBM used the same connector in one of their early LAN setups. Both sides
> of the connector and the cable are relatively cheap if you do some digging.

That's where I got mine, AS-400 was the system. The 90 degree radio
adapters are the expensive bits, and all they due is run one of the pins to
ground.

------------------------------

Message: 3
Date: Mon, 18 Aug 2014 22:08:01 -0400 (EDT)
From: Roger Ruszkowski <flowertime01 at wmconnect.com>
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Going to own a R390A soon.
Message-ID: <8D1896989B60B7D-2C38-27E6A at webmail-m158.sysops.aol.com>
Content-Type: text/plain; charset="us-ascii"

Jim,
still giggling 
welcome to reality

Roger AI4NI

-----Original Message-----
From: Jbrannig <Jbrannig at verizon.net>
To: Jerry Rappel <ww0e at q.com>; r-390 <r-390 at mailman.qth.net>
Sent: Mon, Aug 18, 2014 10:15 am
Subject: Re: [R-390] Going to own a R390A soon.

I use a piece of coax with the center inserted into one pin and the shield 
to the outer shell.
The shield and a jumper to the other pin are held in place with a 
compression clamp.

The end of the coax pig-tail has a female phono plug on it.

This took longer to type then build.

Jim
-----Original Message----- 
From: Jerry Rappel
Sent: Sunday, August 17, 2014 12:04 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Going to own a R390A soon.

Will I need a balanced Twin-Ax antenna plug,like this ?

http://www.ebay.com/itm/R390A-R390-R391-Balanced-Twin-Ax-Ant-Plug-82-5589-RFX-with-RG-58-U-coax-and-BNC-/281415323725?ssPageName=ADME:B:WNARL:US:1123

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Message: 4
Date: Mon, 18 Aug 2014 23:37:45 -0500 (CDT)
From: universal_comm at reagan.com
To: "Chris Kepus" <ckepus at comcast.net>
Cc: r-390 at mailman.qth.net
Subject: Re: [R-390] OT: (kinda) Nolan Lee web site and TV-10C/U
Message-ID: <1408423065.929311533 at webmail.reagan.com>
Content-Type: text/plain; charset="UTF-8"

Chris, I clicked on the link as typed and got a 404 error as a bad link.  I 
checked theurl line and it was copied as typed.  Is there a portion missing?
or is my puter messing up?

-----Original Message-----
From: "Chris Kepus" <ckepus at comcast.net>
Sent: Monday, August 18, 2014 10:56am
To: r-390 at mailman.qth.net
Subject: [R-390] OT: (kinda) Nolan Lee web site and TV-10C/U

the Wayback Machine I went. Sure enough, by entering
"http://www.acadiacom.net/nlee"
in the WB search window, their search return
screen lit up like a neon sign...Eureka!! More NL stuff. His web site main

------------------------------

Message: 5
Date: Wed, 20 Aug 2014 17:09:13 +1000
From: Pete Williams <jupete at internode.on.net>
To: r-390 at mailman.qth.net
Subject: [R-390] WANTED...
Message-ID:
	<CANZavbjXjgENLiYOOBm-D2JMmvryNdjG0hGHb+f1rY1XTasGmg at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

?Have we a source of reliable line filters (240V) for the R-390A....?.. I
need 2.
Thanks
Pete VK3IZ

------------------------------

Message: 6
Date: Sat, 23 Aug 2014 08:17:43 -0500
From: "Ted Breaux" <tbreaux7 at comcast.net>
To: "R-390 Group" <R-390 at mailman.qth.net>
Subject: [R-390] RCA RBC Radio
Message-ID: <DE65460601EC466C8212278DDD0CA831 at TMBPCPC>
Content-Type: text/plain;	charset="iso-8859-1"

I enlist your help to know where to look for my RBC radio drifting off 
frequency.  This radio has been "rock solid" for years and just began to drift, 
slightly, today.  Any ideas will be appreciated.  Yes, I have a 390A.

tbreaux7 at comcast.net

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Message: 7
Date: Sun, 24 Aug 2014 13:02:15 -0400 (EDT)
From: Roger Ruszkowski <flowertime01 at wmconnect.com>
To: tbreaux7 at comcast.net, R-390 at mailman.qth.net
Subject: Re: [R-390] RCA RBC Radio
Message-ID: <8D18DD44A51EEA3-E54-22299 at webmail-d164.sysops.aol.com>
Content-Type: text/plain; charset="us-ascii"

Ted,

The usual suspects in order.

A tube going bad. Any tube draws excess current or less current changes the B+ 
load and drifts the oscillator.
Oxide in a tube socket. Any tube socket. adds resistance to a B+ line and drifts 
the oscillator.
A leaky cap in the oscillator section.

Check all the tubes.
Deoxit the sockets pins and switches.
Give the chassis a general good dusting
Give the case a bath if you can get every thing out of the case.
Eye ball all the parts and solder joints under the chassis for problems.

Shot gun the general stuff first and se if you get a cure.
If no then get specific in the oscillator.

Roger AI4NI

-----Original Message-----
From: Ted Breaux <tbreaux7 at comcast.net>
To: R-390 Group <R-390 at mailman.qth.net>
Sent: Sat, Aug 23, 2014 3:25 pm
Subject: [R-390] RCA RBC Radio

I enlist your help to know where to look for my RBC radio drifting off 
frequency.  This radio has been "rock solid" for years and just began to drift, 
slightly, today.  Any ideas will be appreciated.  Yes, I have a 390A.

tbreaux7 at comcast.net

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