[GreenKeys] M-28's
C & S Hydrick
[email protected]
Sat, 8 Feb 2003 10:12:45 -0700
Hi Larry,
I no longer need an M-28 for myself but would be glad to help move a
couple for anyone else between the "pick-up" point and home. (Chandler,
AZ for me). I have a small truck with a shell but know for a fact it can
take one ASR and one KSR on their backs with no problem, as long as
someone else loads & unloads them! Let me know if there are any takers.
Sherry
-----Original Message-----
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Sent: Tuesday, February 04, 2003 2:01 AM
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Subject: GreenKeys digest, Vol 4 #33 - 7 msgs
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Today's Topics:
1. M-28's ([email protected])
2. Re: M-28's (gil smith)
3. Re: Re: M20-RO (Charles Ring, W3NU)
4. Re: M-28's (Steve Schlink)
5. Re: Re: M20-RO ([email protected])
6. Re: Re: M20-RO (Sheldon Daitch)
7. Re: Re: M20-RO (Don Robert House)
--__--__--
Message: 1
Date: Mon, 03 Feb 2003 08:08:01 -0700
From: [email protected]
To: [email protected]
Subject: [GreenKeys] M-28's
I mentioned in a previous posting somewhere along the line about having
given up my 28ASR and KSR years ago to a fellow collecting them. Looked
him up and got a call back yesterday telling me that he still had all of
them setting there in his garage. Total of about 15 machines, mostly
28's. He had intended on getting a bunch of the hams around the area on
2 meter autostart back in the late 80's. Seems everyone decided
computers were the way to go.
I'm gonna go see him this week and pick up what i can. About 200 miles
from here but to get my original machines back, its well worth the
drive. I figure my pick-um-up truck can haul 3 asr machines or my ASR
with possibly 4 KSR types. Sure be nice if there were enough folks in
the area that all of them could be put back to use. Unfortunately since
my wife has gotten used to putting her car in the garage, i've lost that
space to put radios and tty machines in.
Any other interested parties?
Larry
W0OGH
--__--__--
Message: 2
Date: Mon, 03 Feb 2003 08:34:05 -0700
To: [email protected]
From: gil smith <[email protected]>
Subject: Re: [GreenKeys] M-28's
Cc: [email protected]
Hi Larry:
Aren't you in the Phoenix area? I'm in Mesa, and I'd love a 28-asr (I
have
a place to put it now). I seem to recall that Sherry in Gilbert was
looking for one as well.
Let me know,
gil
At 08:08 AM 2/3/03 -0700, you wrote:
>I mentioned in a previous posting somewhere along the line about having
>given up my 28ASR and KSR years ago to a fellow collecting them.
Looked
>him up and got a call back yesterday telling me that he still had all
of
>them setting there in his garage. Total of about 15 machines, mostly
>28's. He had intended on getting a bunch of the hams around the area
on
>2 meter autostart back in the late 80's. Seems everyone decided
>computers were the way to go.
>
>I'm gonna go see him this week and pick up what i can. About 200 miles
>from here but to get my original machines back, its well worth the
>drive. I figure my pick-um-up truck can haul 3 asr machines or my ASR
>with possibly 4 KSR types. Sure be nice if there were enough folks in
>the area that all of them could be put back to use. Unfortunately
since
>my wife has gotten used to putting her car in the garage, i've lost
that
>space to put radios and tty machines in.
>
>Any other interested parties?
>
>Larry
>W0OGH
>_______________________________________________
>GreenKeys mailing list
>[email protected]
>http://mailman.qth.net/mailman/listinfo/greenkeys
>
>
;-----------------------------------------------------------
; vaux electronics, inc. 480-354-5556
; http://www.vauxelectronics.com (fax: 480-354-5558)
;-----------------------------------------------------------
--__--__--
Message: 3
Date: Mon, 03 Feb 2003 11:27:40 -0500
From: "Charles Ring, W3NU" <[email protected]>
To: [email protected]
Subject: Re: [GreenKeys] Re: M20-RO
Jack wrote:
> I have one of the Lenkurt tone receivers with the
> Associated Press emblem on it. I believe it receives
> at 85 HZ shift. It has a built-in loop supply. As far as I can
> tell, it was wired directly to the incoming telephone circuit and
> the TTY was plugged into the loop jack.
>
> Jack WA2HWJ
>
I have two of them with UPI emblems. They make really nice standalone
loop supplies now with (i think) terminals 3 and 6 on the back panel
jumpered.
--__--__--
Message: 4
Date: Mon, 03 Feb 2003 13:12:45 -0500
To: [email protected]
From: Steve Schlink <[email protected]>
Subject: Re: [GreenKeys] M-28's
Larry,
Where's "in the area"?
Steve
At 08:08 AM 2/3/2003 -0700 [email protected] wrote:
>Sure be nice if there were enough folks in
>the area that all of them could be put back to use. Unfortunately
since
>my wife has gotten used to putting her car in the garage, i've lost
that
>space to put radios and tty machines in.
>
>Any other interested parties?
--__--__--
Message: 5
From: [email protected]
To: "Charles Ring, W3NU" <[email protected]>
Cc: [email protected]
Subject: Re: [GreenKeys] Re: M20-RO
Date: Mon, 03 Feb 2003 14:00:45 +0000
I looked a little closer at the Lenkurt...it is a System 25A unit and
the
label on the front is a United Press label, not AP (I got it from
an old AP guy and assumed it was from AP!). It does have the filter
and seems to function well according to some testing I did on it a few
months
ago.
Jack WA2HWJ
NNNN
>
>
> Jack wrote:
>
> > I have one of the Lenkurt tone receivers with the
> > Associated Press emblem on it. I believe it receives
> > at 85 HZ shift. It has a built-in loop supply. As far as I can
> > tell, it was wired directly to the incoming telephone circuit and
> > the TTY was plugged into the loop jack.
> >
> > Jack WA2HWJ
> >
>
> I have two of them with UPI emblems. They make really nice standalone
> loop supplies now with (i think) terminals 3 and 6 on the back panel
> jumpered.
>
>
>
>
--__--__--
Message: 6
Date: Tue, 04 Feb 2003 08:28:01 +0200
From: "Sheldon Daitch" <[email protected]>
To: [email protected]
Cc: "Charles Ring W3NU" <[email protected]>,
[email protected]
Subject: Re: [GreenKeys] Re: M20-RO
Jack,
OK, maybe it was a Lenkurt 25A system.
As I recall there were two basic setups, the
single subscriber module and the point to point
full sized multiplex (MUX) system.
The shelf mounted unit (actually a self contained
box) that went under the printer unit was a single
channel receiving unit for the system.
At the AP regional bureaus, they had the full fledged
rack mount system. It was somewhat modular,
tho, and each tone transmit and tone receive system
used a separate module. Again, going from memory,
I think the channel frequency plan was the standard
16 channel tone pack, but I really could be wrong on
this. Normally, the bureau unit had mostly transmit
cards, with perhaps a few receive channel cards, but
it generally was not a balanced system, i.e., the
transmit and receive channel capabilities were not
equal. (On second thought, maybe there were
receive cards for each transmit channel if for
nothing else, to monitor each outgoing TTY circuit.)
As best I recall, in the early 1960s, the AP tail circuit,
from the telco office to the subscriber, was a DC loop.
How the telco got the TTY signal from the AP bureau
city to the local end office, I don't know, but I can only guess
the phoners had some type of MUX equipment.
I can only image that between Lenkurt marketing a TTY
multiplex system, the AP needing to expand its distribution system
and the phoners raising the tariffs that the AP decided to get the
phoners out of the DC network, and simply lease a voice
frequency grade distribution network that was much easier to
handle than what had to be done with the DC tail circuits. I think
this transition occurred somewhere in the mid to late 1960s.
Another savings could have been that from an AP bureau to
the telco facility, there was a DC loop for each outgoing
TTY circuit and with the tone MUX, only one VF grade
audio pair was necessary. I suspect money was really the
driving force at that time.
The Lenkurt system worked fine at 60 to about 75 wpm
but I think it became marginal in trying to run 100 wpm.
I believe there was one channel, maybe a weather crawl
for cable TV operators, that was on the ragged edge of the
capabilities of the Lenkurt system.
73
Sheldon
[email protected] wrote:
> I looked a little closer at the Lenkurt...it is a System 25A unit and
the
> label on the front is a United Press label, not AP (I got it from
> an old AP guy and assumed it was from AP!). It does have the filter
> and seems to function well according to some testing I did on it a few
months
> ago.
>
> Jack WA2HWJ
>
> NNNN
> >
> >
> > Jack wrote:
> >
> > > I have one of the Lenkurt tone receivers with the
> > > Associated Press emblem on it. I believe it receives
> > > at 85 HZ shift. It has a built-in loop supply. As far as I can
> > > tell, it was wired directly to the incoming telephone circuit and
> > > the TTY was plugged into the loop jack.
> > >
> > > Jack WA2HWJ
> > >
> >
> > I have two of them with UPI emblems. They make really nice
standalone
> > loop supplies now with (i think) terminals 3 and 6 on the back panel
> > jumpered.
> >
> >
> >
> >
>
> _______________________________________________
> GreenKeys mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/greenkeys
--__--__--
Message: 7
Date: Mon, 3 Feb 2003 23:09:47 -0800
To: "Sheldon Daitch" <[email protected]>
From: Don Robert House <[email protected]>
Subject: Re: [GreenKeys] Re: M20-RO
Cc: [email protected]
Lenkurt was part of GTE. What is left of it is XEL Communications in
Aurora, CO now owned by another company. Several Lenkurt carrier
systems were used by the Holiday Inn HOLIDEX system. I used to tweak
the loop adjustments for the guy in Memphis for the promise of a cup
of coffee. Tee hee that was long ago. If you go to
http://www.holidex.com you will see that it is a tourist site for
visitors to Africa. Time moves on...
Don
--__--__--
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End of GreenKeys Digest