From: "Lawrence Walker" <lwalker(a)mail.interlog.com>
Subject: Re: TRS-80 Questions
On 24 Feb 98 at 21:27, Tony Duell wrote:
>> > 2. Included with a TRS CoCo 1 I picked up last summer was
>> > an adapter plugged into the cass.port. a label "TotalCommunications"
>> > on one side and "Telelearning" on the other. Into this was plugged
>> > another M/M adapter labelled " RS232 Gender Changer" Was this for
>> > hooking up a fdd and/or modem ?
>>
>> My guess, and it's only a guess is that this is some kind of kludge to
>> allow you to CLOAD (and maybe CSAVE) programs to/from an RS232 device. It
>> may have been part of one of those classroom 'networks' where the teacher
>> loaded a program onto his machine, all the pupils typed CLOAD, the
>> teacher typed CSAVE and the program was downloaded onto all the pupils'
>> machines.
>>
> Now that seems like it has possibilities . And it takes up so
>little room !
It is more than likely a modem or parts to one. On the Commodore 64
the Total Telecommunications Modems are very well known (because they
were VERY cheap and good quality Commodore 1650 clone direct-connect
auto-answer 300 baud modem) I ran my BBS on one for years..
My assumtion is that the Telelearning project (which, from my book,
looks like a Compuserve, Q-Link or similar on-line network geared for
education) failed miserably and all the modem/software packs were sold
at pennies to the dollar.
I thought there were just Total Telecomm modems out there.... I
wonder what other computers that made modems for.
Larry Anderson
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Visit our web page at: http://www.goldrush.com/~foxnhare/
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>> Better question is where they FIND them, I have plenty of room and my wife
is
>> mostly understanding. Well, in the way that an antelope understands linear
>> algebra anyway.
I recently tried advertising in a national computer "for sale" magazine.
This worked very well, but I don't know if it would work so well outside
of Australia. Huge numbers of offers, some of which were really good -
but they came from all over Australia, and many were either XTs or other
boring computers, or situations where people really belived they had a
wonderful collectors items, and thus asked 3 or 4 times what I considered
their worth.
Adam.
Doug,
I used to repair tempested Zenith Inteq 248 machines in the late
1980's. As mentioned earlier, the 16 bit boards were all isolated in
the chassis and had cables run through a dead space to the external
connectors. All boards have rfi suppression coils built in and of
course there is a rfi suppression braid gasket running the entire
circumference of the main system unit, if I recall there were about
thirty-six to forty screws holding the cover on. The keyboard was
tempested as well as the color monitor, both of these being very heavy
in comparison to a untempested Z-248 system. I ran service calls out
at the Vint Hill Farms Army base (near Warrenton, Virginia) to service
these and always found it strange to have a tempested unit in a
shielded building in a bank vault. Yes they used Syquest 10MB
removeable disks. Also, whenever we had one of these units in our shop
for repair (off base), prior to it being placed back in service,
security would use an rfi sniffer prior to acceptance to ensure there
was no leakage. I found a complete Zenith Inteq 248 with tempested
color monitor and keyboard at a church sale a few years ago. I
regretfully broke the rfi qa seal on the system unit and removed the
cmos battery (AA lithium) as I was afraid it would leak and damage the
system unit as I was tucking it away (until I find space to display
it). When I broke the seal, I documented the date and reason why and
placed this note inside the system unit so as to document its history.
The system booted fine. Built like a tank.
Marty Mintzell
______________________________ Reply Separator
_________________________________
Subject: Re: Zenith Inteq
Author: classiccmp(a)u.washington.edu at internet
Date: 2/26/98 11:08 PM
Doug Yowza wrote:
> On Thu, 26 Feb 1998, Mike Allison wrote:
>
> > My experience with these "TEMPEST" machines is that it's usually best to
> > swap out all the parts (great difficulty at times) and use the AT parts
> > in another box. The box is heavy and, as you stated, designed to
> > firewall the parts from the actual physical ports. There are good parts
> > on them however, disk drives, scsi connectors, video cards, mother
> > boards, memboards, that would work nice in another box and be easier
> > (read that cheaper) to mail.
"TEMPEST" standards are there to afford proper sheilding to prevent
radiations/emmisions fromt he machine when it's being used for security
information. The thicker covers, ground braids and multiple screws in the
covers make it better sealed and there should be no emmisions over 12 inches
from the machine, or none at all ideally. Other than the power supply being a
class A type, the rest is normal but may have been refitted with a shielded
faceplate.
--------------------------------------------------------------------
Russ Blakeman
RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144
Phone: (502) 756-1749 / Data/Fax:(502) 756-6991
Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com
Website: http://members.tripod.com/~RHBLAKE/
* Parts/Service/Upgrades and more for MOST Computers*
--------------------------------------------------------------------
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From: Russ Blakeman <rhblake(a)bbtel.com>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: Zenith Inteq
References: <Pine.LNX.3.95.980226214359.11741A-100000(a)behemoth.host4u.net>
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I'm lucky, in that I sit in a nice, big computer dungeon at work that the
bosses seem to not care about much. Either that or they can't tell the
difference between the new Digital NT boxes and the Vaxen.... ;)
At 07:26 AM 2/27/98 -0500, you wrote:
><><< Geez, where do you guys keep all these computers??? >>
>
>4bedrooms and the computer room is the smallest and also my office. That
>limits me to 150sqft or about 1000cuft inside the house. The garage
>is also huge (and resonably warm in the winter) so a fair amount it out
>there too.
>
>< Yeah, it's easier to give up the wife and kids and to keep the
><computers. A lot quieter too.
>
>Forget kids, I am the wife!
>
>Allison
>
>
<><< Geez, where do you guys keep all these computers??? >>
4bedrooms and the computer room is the smallest and also my office. That
limits me to 150sqft or about 1000cuft inside the house. The garage
is also huge (and resonably warm in the winter) so a fair amount it out
there too.
< Yeah, it's easier to give up the wife and kids and to keep the
<computers. A lot quieter too.
Forget kids, I am the wife!
Allison
Although it is very clean and included all the manuals and software, I paid
twice that for my Executive.
Cliff Gregory
cgregory(a)lrbcg.com
-----Original Message-----
From: classiccmp(a)u.washington.edu <classiccmp(a)u.washington.edu>
To: Cgregory <Cgregory>
Date: Friday, February 27, 1998 6:56 AM
Subject: Osborne Executive
>
>I have the opportunity to get one - cosmetics OK, operation dubious - for
>$60.
>Is this machine (Osborne Executive) worth picking up, or relatively common?
>Thanks
>A
>
>
In addition to the previous message today, I also have an original Tandy
1000 (no suffix) that can go a number of ways:
Main unit with 640k ram (expansion card), 2 360k floppies,
keyboard...$25 plus shipping
Main unit with 640k ram (expansion card), NO floppies, keyboard
........$18 plus shipping
Main unit with basic ram (no expansion), NO floppies,
keyboard...........$ 15 plus shipping
The shipping weight is dependant upon the way it gets sold. Buy the
complete unit ($25 plus s/h) and I'll throw in a Tandy joystick. As to
the items I'll have left, that depends on how the unit gets sold.
--------------------------------------------------------------------
Russ Blakeman
RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144
Phone: (502) 756-1749 / Data/Fax:(502) 756-6991
Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com
Website: http://members.tripod.com/~RHBLAKE/
* Parts/Service/Upgrades and more for MOST Computers*
--------------------------------------------------------------------
p.s. these computers mentioned in a previous post also have video cards
that support both VGA and RGB monitor graphics.
CORD
--
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So far the week has been good a few finds are; digital VT240 model VS240-B
untested; HP Laserjet II has a paper feed problem; Chameleon luggable not
tested yet; AST Premium 386/33 not tested yet; Tektronix KB pn
119-1592-02has built mouse pad; Apple IIe mouse;
variuos books and manuals; a number of different cables; Sun 3/60 not
tested yet; a large number of parts for apples, digital, pc, trs-80 and
others. My best find was free card called a SYNPHONIX Electronic Speech
Articulator model 100 by a company called Artic Technologies with a date
1985 on it. Does anyone have any more info on this card such as is for a pc
or apple, any special software needs ? Thanks and keep on computing -->
John
