On 10/05/2013 05:03 PM, Mark Benson wrote:
It would likely be easier to repair the existing power supplies. Are
schematics around?
That depends what components die and how directly replaceable they are.
True, of course. But it's usually electrolytic capacitors in older
switching power supplies. Not exclusively, of course, but usually.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On 5 Oct 2013, at 20:28, Dave McGuire <mcguire at neurotica.com> wrote:
On 10/05/2013 12:56 PM, Sampsa Laine wrote:
A 340 is nice. The 330 is pretty much the same, except for being
monochrome.
The problem with the 340 is that the power supply have a tendency
of blowing up with age. (I have two broken ones...)
Can they be replaced with anything sensible, i.e. could a qualified
electrician build a new one for not too much effort?
Electricians do not do this sort of work. They primarily pull cable
and run what amounts to plumbing and lots of physical construction.
What you're talking about is engineering.
I think it was a poor choice of words and he mean 'electrical engineer' :)
It would likely be easier to repair the existing power supplies. Are
schematics around?
That depends what components die and how directly replaceable they are.
--
Mark Benson
http://DECtec.info
Twitter: @DECtecInfo
HECnet: STAR69::MARK
Online Resource & Mailing List for DEC Enthusiasts.
On 10/05/2013 11:45 AM, Johnny Billquist wrote:
I have two VaxStation 3100's that I bought some time back but didn't
have time to mess with until now.
Unlike my DEC 3000, the serial console is an MMJ port and not a DB9
serial port.
Does anyone have an excess or spare MMJ to DB9 adaptor, or know where
I can purchase an inexpensive one?
First of all, you are talking about a DE9, not a DB9 (surprising how
many don't know the correct name of that connector).
I educate whomever I can, but I have all but given up on the general
technical public understanding this.
Second, DEC often used a different pinout for a DE9 than IBM did, so you
might not be too happy with the adapter, depending on what you want in
the end.
In this case, the DEC-machine-facing side is the MMJ. (at least that
is my understanding)
I tired hooking up my multisync monitor I have hooked up to my DEC
3000, but I don't think the graphic card is set to a setting within
the monitor's range, as nothing shows up.
Do the DEC 3000 have a VGA port?
It does not.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On Sat, 5 Oct 2013, Dave McGuire wrote:
On 10/05/2013 03:44 PM, Cory Smelosky wrote:
On Sat, 5 Oct 2013, Dave McGuire wrote:
On 10/05/2013 03:32 PM, Cory Smelosky wrote:
A 340 is nice. The 330 is pretty much the same, except for being
monochrome.
The problem with the 340 is that the power supply have a tendency
of blowing up with age. (I have two broken ones...)
Can they be replaced with anything sensible, i.e. could a qualified
electrician build a new one for not too much effort?
Electricians do not do this sort of work. They primarily pull cable
and run what amounts to plumbing and lots of physical construction.
What you're talking about is engineering.
It would likely be easier to repair the existing power supplies. Are
schematics around?
...or wire up an ATX supply.
....if it has the right voltages. Not everything is +12/+5.
Or the occasional 3.3. You can also get hacky and drop the voltage on
the rails with the right circuit.
Yes. But almost nothing is 3.3V in the age range we're talking about.
The VT340 in particular predates mainstream 3.3V logic by at least a
decade. Mine was a context-sensitive comment.
-Dave
Ahh. Mine wasn't context-senstive. I highly doubted the VT340 would use 3.3V logic.y
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
On 10/05/2013 03:44 PM, Cory Smelosky wrote:
On Sat, 5 Oct 2013, Dave McGuire wrote:
On 10/05/2013 03:32 PM, Cory Smelosky wrote:
A 340 is nice. The 330 is pretty much the same, except for being
monochrome.
The problem with the 340 is that the power supply have a tendency
of blowing up with age. (I have two broken ones...)
Can they be replaced with anything sensible, i.e. could a qualified
electrician build a new one for not too much effort?
Electricians do not do this sort of work. They primarily pull cable
and run what amounts to plumbing and lots of physical construction.
What you're talking about is engineering.
It would likely be easier to repair the existing power supplies. Are
schematics around?
...or wire up an ATX supply.
....if it has the right voltages. Not everything is +12/+5.
Or the occasional 3.3. You can also get hacky and drop the voltage on
the rails with the right circuit.
Yes. But almost nothing is 3.3V in the age range we're talking about.
The VT340 in particular predates mainstream 3.3V logic by at least a
decade. Mine was a context-sensitive comment.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On Sat, 5 Oct 2013, Dave McGuire wrote:
On 10/05/2013 03:32 PM, Cory Smelosky wrote:
A 340 is nice. The 330 is pretty much the same, except for being
monochrome.
The problem with the 340 is that the power supply have a tendency
of blowing up with age. (I have two broken ones...)
Can they be replaced with anything sensible, i.e. could a qualified
electrician build a new one for not too much effort?
Electricians do not do this sort of work. They primarily pull cable
and run what amounts to plumbing and lots of physical construction.
What you're talking about is engineering.
It would likely be easier to repair the existing power supplies. Are
schematics around?
...or wire up an ATX supply.
....if it has the right voltages. Not everything is +12/+5.
-Dave
Or the occasional 3.3. You can also get hacky and drop the voltage on the rails with the right circuit.
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
-----Original Message-----
From: owner-hecnet at Update.UU.SE [mailto:owner-
hecnet at Update.UU.SE] On Behalf Of Sampsa Laine
Sent: 05 October 2013 20:33
To: hecnet at Update.UU.SE
Subject: Re: [HECnet] DECNET over serial ports?
On 5 Oct 2013, at 21:28, "Brian Schenkenberger, VAXman-"
<system at TMESIS.COM> wrote:
Sampsa Laine <sampsa at mac.com> writes:
Is it possible to send DECNET frames over regular RS232 serial ports?
DDCMP!
Thanks guys, might try this out on one of my MicroVAX 3400s at some point,
I've run out ethernet transceivers so I'll wire it into a VAXstation that
is
HECnet connected.
Would this work?
sampsa
The VAXstation will need to configured as a router, but that is very easy to
do.
Regards
Rob
On 10/05/2013 03:32 PM, Cory Smelosky wrote:
A 340 is nice. The 330 is pretty much the same, except for being
monochrome.
The problem with the 340 is that the power supply have a tendency
of blowing up with age. (I have two broken ones...)
Can they be replaced with anything sensible, i.e. could a qualified
electrician build a new one for not too much effort?
Electricians do not do this sort of work. They primarily pull cable
and run what amounts to plumbing and lots of physical construction.
What you're talking about is engineering.
It would likely be easier to repair the existing power supplies. Are
schematics around?
...or wire up an ATX supply.
....if it has the right voltages. Not everything is +12/+5.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On 5 Oct 2013, at 21:28, "Brian Schenkenberger, VAXman-" <system at TMESIS.COM> wrote:
Sampsa Laine <sampsa at mac.com> writes:
Is it possible to send DECNET frames over regular RS232 serial ports?
DDCMP!
Thanks guys, might try this out on one of my MicroVAX 3400s at some point, I've run out ethernet transceivers so I'll wire it into a VAXstation that is HECnet connected.
Would this work?
sampsa
On Sat, 5 Oct 2013, Dave McGuire wrote:
On 10/05/2013 12:56 PM, Sampsa Laine wrote:
A 340 is nice. The 330 is pretty much the same, except for being
monochrome.
The problem with the 340 is that the power supply have a tendency
of blowing up with age. (I have two broken ones...)
Can they be replaced with anything sensible, i.e. could a qualified
electrician build a new one for not too much effort?
Electricians do not do this sort of work. They primarily pull cable
and run what amounts to plumbing and lots of physical construction.
What you're talking about is engineering.
It would likely be easier to repair the existing power supplies. Are
schematics around?
...or wire up an ATX supply.
-Dave
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
