On 6/9/2020 11:51 AM, Glen Slick via cctalk wrote:
On Tue, Jun 9, 2020 at 9:04 AM Bill Gunshannon via cctalk
wrote:
For the VXT-2000 with an H7109-B the rated voltage and current values
are printed right on the power supply label:
+5.1V, 7.81A
+12.1V, 0.62A
-12.1V, 0.46A
-9V, 0.2A
Fixed wi
On 6/9/20 7:13 PM, Glen Slick via cctalk wrote:
On Tue, Jun 9, 2020 at 3:10 PM Bill Gunshannon via cctalk
wrote:
On 6/9/20 2:51 PM, Glen Slick via cctalk wrote:
On Tue, Jun 9, 2020 at 9:04 AM Bill Gunshannon via cctalk
wrote:
I have a VXT-2000. It is broke. If I could find out what the v
On 6/9/2020 11:51 AM, Glen Slick via cctalk wrote:
On Tue, Jun 9, 2020 at 9:04 AM Bill Gunshannon via cctalk
wrote:
For the VXT-2000 with an H7109-B the rated voltage and current values
are printed right on the power supply label:
+5.1V, 7.81A
+12.1V, 0.62A
-12.1V, 0.46A
-9V, 0.2A
Fixed wi
On Tue, Jun 9, 2020 at 3:10 PM Bill Gunshannon via cctalk
wrote:
>
> On 6/9/20 2:51 PM, Glen Slick via cctalk wrote:
> > On Tue, Jun 9, 2020 at 9:04 AM Bill Gunshannon via cctalk
> > wrote:
> >>
> >> I have a VXT-2000. It is broke. If I could find out what the voltage
> >> and current requireme
On Tue, 9 Jun 2020, Bill Gunshannon via cctalk wrote:
> > For the VXT-2000 with an H7109-B the rated voltage and current values
> > are printed right on the power supply label:
> >
> > +5.1V, 7.81A
> > +12.1V, 0.62A
> > -12.1V, 0.46A
> > -9V, 0.2A
> >
> > Fixed width character pinout diagram:
>
On 6/9/20 2:51 PM, Glen Slick via cctalk wrote:
On Tue, Jun 9, 2020 at 9:04 AM Bill Gunshannon via cctalk
wrote:
I have a VXT-2000. It is broke. If I could find out what the voltage
and current requirements were and their positions on the power connector
I would replace it in a heartbeat.
On 6/9/20 2:10 PM, Josh Dersch via cctalk wrote:
> On Tue, Jun 9, 2020 at 7:44 AM Jon Elson wrote:
> Thanks Jon (and everyone else). Yes, this is a ferroresonant transformer
> (w/matching motor-run cap), I'd just never heard one in a DEC machine that
> was so very loud. I'll see if there's anyt
On Tue, Jun 9, 2020 at 7:44 AM Jon Elson wrote:
> On 06/09/2020 01:59 AM, Josh Dersch via cctalk wrote:
> > Hi all --
> >
> > I'm working on a PDP-8/A I picked up at VCF West last summer. After a
> lot
> > of cleaning and some power supply repair it's showing signs of life (CPU
> > seems to be a
Den tis 9 juni 2020 kl 19:04 skrev Ethan Dicks via cctalk <
cctalk@classiccmp.org>:
> On Tue, Jun 9, 2020 at 10:46 AM Jon Elson via cctalk
> wrote:
> > On 06/09/2020 09:27 AM, Anders Nelson via cctalk wrote:
> > > Related question: Is there any reason, other than historical accuracy
> and
> > > c
On Tue, Jun 9, 2020 at 9:04 AM Bill Gunshannon via cctalk
wrote:
>
> I have a VXT-2000. It is broke. If I could find out what the voltage
> and current requirements were and their positions on the power connector
> I would replace it in a heartbeat.
>
For the VXT-2000 with an H7109-B the rated
Interesting, good to know!
--
Anders Nelson
On Tue, Jun 9, 2020 at 1:04 PM Ethan Dicks via cctalk
wrote:
> On Tue, Jun 9, 2020 at 10:46 AM Jon Elson via cctalk
> wrote:
> > On 06/09/2020 09:27 AM, Anders Nelson via cctalk wrote:
> > > Related question: Is there any reason, other than historica
On Tue, Jun 9, 2020 at 10:46 AM Jon Elson via cctalk
wrote:
> On 06/09/2020 09:27 AM, Anders Nelson via cctalk wrote:
> > Related question: Is there any reason, other than historical accuracy and
> > cost, to not replace the power supplies in vintage computers with modern
> > switching power suppl
On 6/9/20 10:34 AM, Toby Thain via cctalk wrote:
On 2020-06-09 10:27 a.m., Anders Nelson via cctalk wrote:
Related question: Is there any reason, other than historical accuracy and
cost, to not replace the power supplies in vintage computers with modern
switching power supplies?
3) If it ain'
On 06/09/2020 09:27 AM, Anders Nelson via cctalk wrote:
Related question: Is there any reason, other than historical accuracy and
cost, to not replace the power supplies in vintage computers with modern
switching power supplies?
The old discrete transistor machines often used fairly odd
voltag
On 06/09/2020 01:59 AM, Josh Dersch via cctalk wrote:
Hi all --
I'm working on a PDP-8/A I picked up at VCF West last summer. After a lot
of cleaning and some power supply repair it's showing signs of life (CPU
seems to be at least minimally functional, core memory is going to need
some debuggi
> On Jun 9, 2020, at 10:27 AM, Anders Nelson via cctalk
> wrote:
>
> Related question: Is there any reason, other than historical accuracy and
> cost, to not replace the power supplies in vintage computers with modern
> switching power supplies?
>
> --
> Anders Nelson
RFI? Old computers ar
On 2020-06-09 10:27 a.m., Anders Nelson via cctalk wrote:
> Related question: Is there any reason, other than historical accuracy and
> cost, to not replace the power supplies in vintage computers with modern
> switching power supplies?
>
3) If it ain't broke, don't fix it
> --
> Anders Nelson
>
Related question: Is there any reason, other than historical accuracy and
cost, to not replace the power supplies in vintage computers with modern
switching power supplies?
--
Anders Nelson
On Tue, Jun 9, 2020 at 10:19 AM Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
>
>
> > On Jun 9,
> On Jun 9, 2020, at 2:59 AM, Josh Dersch via cctalk
> wrote:
>
> Hi all --
>
> I'm working on a PDP-8/A I picked up at VCF West last summer. After a lot
> of cleaning and some power supply repair it's showing signs of life (CPU
> seems to be at least minimally functional, core memory is go
On Tue, 9 Jun 2020, Marco Rauhut wrote:
i have restored last year a PDP-8/a to and had the same experience like
you with the Powersuppy. I felt also wiered about the bang in the
transformer in the moment of switching it on.
Does it have a ferroresonant power supply? Then the hum and bang is no
Is there a recommended alternative or replacement power supply for the 8/A?
thanks
On Tue, Jun 9, 2020 at 4:20 AM Marco Rauhut via cctalk
wrote:
>
> Hi Josh,
>
> i have restored last year a PDP-8/a to and had the same experience like you
> with the Powersuppy. I felt also wiered about the bang i
Hi Josh,
i have restored last year a PDP-8/a to and had the same experience like you
with the Powersuppy. I felt also wiered about the bang in the transformer in
the moment of switching it on.
Marco
> Am 09.06.2020 um 09:02 schrieb Josh Dersch via cctalk :
>
> Hi all --
>
> I'm working on a
Hi all --
I'm working on a PDP-8/A I picked up at VCF West last summer. After a lot
of cleaning and some power supply repair it's showing signs of life (CPU
seems to be at least minimally functional, core memory is going to need
some debugging.)
The transformer in the power supply is humming qui
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