19 Oct
2008
19 Oct
'08
5:11 p.m.
-------------Original Message:
Date: Sun, 19 Oct 2008 01:29:14 -0400
From: "Roy J. Tellason" <rtellason at verizon.net>
Subject: Re: Req: Help/Advice on Cromemco System
<snip>
The catch, though, is that the System 3 needs a +24V supply as well, for
the FDD. I have one, and it uses an oddball connector, too, which is one
of the reasons I haven't gotten around to fixing the drive yet (which has
problems), I need to make an extension power cable for the drive so it can
be powered up and out in front of the case.
(Snip)
----------------Reply:
Sounds like you've got one of the later System 3's with a Tandon TM848;
the older ones used dual-slot Perscis, which used 110VAC for the motor.
And of course he could also use a 5 1/4" drive instead.
m
19 Oct
19 Oct
5:31 p.m.
On 19 Oct 2008 at 17:11, M H Stein wrote:
Sounds like you've got one of the later System
3's with a Tandon TM848;
the older ones used dual-slot Perscis, which used 110VAC for the motor.
And of course he could also use a 5 1/4" drive instead.
The Persci 270/277 dual drives still require +24v for the positioner,
no?
Cheers,
Chuck
6:38 p.m.
On 19 Oct 2008 at 17:11, M H Stein wrote:
Yes they do - I have both the newer (dual tandon) and older (persci)
System-3's, and they both have a 24v supply, and it's needed for the
drives in both cases.
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.classiccmp.org/dunfield/index.html
Sounds like you've got one of the later
System 3's with a Tandon TM848;
the older ones used dual-slot Perscis, which used 110VAC for the motor.
And of course he could also use a 5 1/4" drive instead.
The Persci 270/277 dual drives still require +24v for the positioner,
no? 
5:40 p.m.
On Sunday 19 October 2008 17:11, M H Stein wrote:
-------------Original Message:
Date: Sun, 19 Oct 2008 01:29:14 -0400
From: "Roy J. Tellason" <rtellason at verizon.net>
Subject: Re: Req: Help/Advice on Cromemco System
<snip>
The catch, though, is that the System 3 needs a +24V supply as well, for
the FDD. I have one, and it uses an oddball connector, too, which is
one of the reasons I haven't gotten around to fixing the drive yet (which
has problems), I need to make an extension power cable for the drive so it
can be powered up and out in front of the case.
(Snip)
----------------Reply:
Sounds like you've got one of the later System 3's with a Tandon TM848;
the older ones used dual-slot Perscis, which used 110VAC for the motor.
Hm, that might've been a bad asumption on my part. I do believe the ones in
there is indeed one of those dual-slot Persci drives.
And of course he could also use a 5 1/4" drive
instead.
Sure, anything's possible, but the box really isn't set up for those.
--
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