24 Aug
2013
24 Aug
'13
10:55 a.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Robert Jarratt
Sent: 24 August 2013 08:32
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: DEQNA/DELQA cabinet kit fault mystery
called
has
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of David Riley
Sent: 24 August 2013 02:24
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: DEQNA/DELQA cabinet kit fault mystery
On Aug 23, 2013, at 4:18 PM, ard at p850ug1.demon.co.uk (Tony Duell)
wrote:
IIRC there is a ltitle electronics in these
cabkits, something like
a linear voltae regualtor to provide the power for the transceiver.
Is it possible that this has failed. Have yuo measured the votlage
ebtween the transceiver power ins on the AUI connector using both
the good and bad cabkits (with the machine powered up, of course)?
Unless I'm grossly mistaken, the only thing that's even close to being electronics on the cab kit is a fuse. It is
otherwise just wires
(inasmuch as a
fuse is not a wire).
Indeed, there are no active components, just a fuse. The kit is entirely
passive.
My money is on a bad receptacle pin socket. Have
you tried plugging
in an unpopulated DA15 plug (solder cup type) and checking the
continuity with that?
- Dave
This is the avenue I am going to pursue. This cab kit used to work, but it stopped working. I will just have to find a DA15 plug
to test with.
Regards
Rob
Even more mysterious now. I got a DA15 plug and tested it plugged into the
cabinet kit socket. Continuity was fine. So I decided to test the other side
of the cable, at the connector that plugs into the DEQNA, using a card edge
connector I have lying around. That too was fine.
Either the plug and card edge connectors I used make better contact than the
DEQNA and the AUI converter, or the problem has temporarily gone away. I
should note that I tried the same cabinet kit with a DELQA, so I have tested
that side of the kit with two cards, and I have also tested it with two
different AUI converters.
I will have to try putting it back on the DEQNA and see if it works, and
perhaps test the outputs with it actually connected.
Regards
Rob