5 Mar
2005
5 Mar
'05
4:40 p.m.
-------Original Message:
Date: Sat, 5 Mar 2005 12:41:50 -0600
From: "Randy McLaughlin" <cctalk at randy482.com>
Subject: Re: 8' drive on PC troubleshooting
From: "Geoff Reed" <geoffr at
zipcon.net>
Sent: Saturday, March 05, 2005 11:55 AM
veryify
are there any 8" drives out there that
don't require 24 volts to
work? I
have LOTS of powersupplies that supply GND, +5
and +12, but none
that also
supply +24 :(
To my knowlegde +5v & +24v are required by all 8" drives, other
voltages
vary from drive to drive. Before plugging in power connectors voltages.
Randy
If this is on an S-100 System (and if we're talking about 8"
drives, as opposed to the very rare 8' ones :), you can try
connecting the +24V line to the unregulated +18V.
From the installation instructions for the Quintec
Tophat, a
dual 8" (TM848 Tandon) drive assembly that fits across the top of
a Cromemco Z-2:
...Using a good DC voltmeter be certain that the +18V line is running
at least 18 volts, preferably higher, around 19 volts...
And if anyone really needs a +24V supply, I *might* have one or
two in the basement somewhere (+5, +12, +24). Not light, though,
as I recall...
mike