> On May 4, 2017, at 11:54 AM, Jon Elson via cctalk
> wrote:
>
> ... But, you DO need a true sine wave source, and VFDs do not produce sine
> waves, they put out 400 V PWM waveforms that look fine to a motor, but not
> good at all to electronic loads.
I wonder how true that is. Consider th
> On May 4, 2017, at 8:59 AM, Jon Elson wrote:
>
> On 05/04/2017 10:36 AM, Guy Sotomayor Jr via cctalk wrote:
>>>
>> OK, that’s not helping. Here’s what I have (from IBM site planning docs
>> GC22-7064-10 and GC22-7069-2):
>> 3340-A2 DASD: 2.2 kVA 3-phase
>> 3340-B2 DASD: 1.7 kVA 3-phase (pow
kVA is simply kilovolts times amps. It is roughly a synonym for kW, except
that it probably ignores the phase angle. So for resistive loads, kVA == kW
but for inductive or capacitive loads, kVA would be larger.
1 hp == 746 W. But when people talk about phase converter hp limits, they are
loo
On 05/04/2017 10:36 AM, Guy Sotomayor Jr via cctalk wrote:
On May 4, 2017, at 8:04 AM, jim stephens via cctalk
wrote:
On 5/4/2017 7:36 AM, Guy Sotomayor Jr via cctalk wrote:
Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? IBM’s
docs all specify power in KVa and mos
On 05/04/2017 09:36 AM, Guy Sotomayor Jr via cctalk wrote:
Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? IBM’s
docs all specify power in KVa and most of the 3 phase converters (other than
what Bob posted) seem to specify HP. If I’m going to spend serious coin on a
p
> On May 4, 2017, at 8:04 AM, jim stephens via cctalk
> wrote:
>
>
>
> On 5/4/2017 7:36 AM, Guy Sotomayor Jr via cctalk wrote:
>> Does anyone know how to convert KVa to 208v 3-phase currents and/or HP?
>> IBM’s docs all specify power in KVa and most of the 3 phase converters
>> (other than
On 5/4/2017 7:36 AM, Guy Sotomayor Jr via cctalk wrote:
Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? IBM’s
docs all specify power in KVa and most of the 3 phase converters (other than
what Bob posted) seem to specify HP. If I’m going to spend serious coin on a
ph
s made to power a big
> bunch of vacuum column tapes.
>
> Marc
>
>
>
> From: cctalk on behalf of
> "cctalk@classiccmp.org"
> Reply-To: Bob Rosenbloom , "cctalk@classiccmp.org"
>
> Date: Wednesday, May 3, 2017 at 10:04 PM
> To: "cctalk
@classiccmp.org"
Date: Wednesday, May 3, 2017 at 10:04 PM
To: "cctalk@classiccmp.org"
Subject: Re: IBM 4331 Mainframe 3 phase converter
I use a solid state one, an older version of this:
http://www.phasetechnologies.com/downloads/products/phase-perfect/pt330specs.pdf
Bo
in the shop (er,
garage), courtesy of the EV charger.
Marc
On Apr 30, 2017, at 9:38 PM, Guy Sotomayor Jr via cctalk
wrote:
Just to let folks know that I finally moved the IBM 4331 Mainframe this past
weekend
from where it was currently stored to my shop. Pictures are here:
https
PM, Guy Sotomayor Jr via cctalk
wrote:
Just to let folks know that I finally moved the IBM 4331 Mainframe this past
weekend
from where it was currently stored to my shop. Pictures are here:
https://www.flickr.com/gp/150223282@N04/NrX91K
<https://www.flickr.com/gp/150223282@N04/NrX91K&g
> The 4361 is the real gem to get in this type of system. There is a
> builtin storage director as well as the 4 port comm controller.
The 4331 had an option for an integrated storage director, as well as a
feature that converted between CKD and FBA for use with 3340 drives. The
system Guy owns o
From: Guy Sotomayor Jr [g...@shiresoft.com]
Sent: Monday, May 1, 2017 1:57 PM
To: Bill Gunshannon
Cc: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: IBM 4331 Mainframe
> On May 1, 2017, at 10:49 AM, Bill Gunshannon
> wrote:
>
On 5/1/2017 9:48 AM, Dave Wade G4UGM via cctalk wrote:
Yes I remember having a gentle discussion with the University of Salford
electricians, who wanted to know why I wanted 2 x 100amp feeds for the room
into which the 4361 (I think it was a 4361, might have been a 4331 or 4341) was
placed.
On Mon, May 1, 2017 at 12:38 AM, Guy Sotomayor Jr via cctalk
wrote:
> Just to let folks know that I finally moved the IBM 4331 Mainframe this past
> weekend
> from where it was currently stored to my shop. Pictures are here:
> https://www.flickr.com/gp/150223282@N04/NrX9
channel+cpu#47
about the problems that were had with this CPU.
Dave Wade
From: dwight [mailto:dkel...@hotmail.com]
Sent: 01 May 2017 17:54
To: dave.g4...@gmail.com; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: IBM 4331 Mainframe
Aren't these water cooled?
I se
> On May 1, 2017, at 10:49 AM, Bill Gunshannon
> wrote:
>
>
> Just hope you don't have a head crash. Had one when I was at Ft.
> Ben Harrison (a long time ago, when the 4341 was just going into
> production. We had one of the first!) and it sounded like the building
> was coming down. Hate t
On 05/01/2017 11:53 AM, dwight via cctalk wrote:
Aren't these water cooled?
I seem to remember hoses.
No, the 43xx series are all air-cooled. The 360/85 and
370/165 and 168 and 3033 series were water-cooled.
Cables the size of garden hoses, for sure, but no water.
Jon
bill
From: cctalk [cctalk-boun...@classiccmp.org] on behalf of Guy Sotomayor Jr via
cctalk [cctalk@classiccmp.org]
Sent: Monday, May 1, 2017 12:57 PM
To: dwight; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: IBM 4331 Mainframe
> On May 1, 2017,
ent: Monday, May 1, 2017 9:48:52 AM
> To: 'Guy Sotomayor Jr'; 'General Discussion: On-Topic and Off-Topic Posts'
> Subject: RE: IBM 4331 Mainframe
>
>> -Original Message-
>> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Guy
>>
Aren't these water cooled?
I seem to remember hoses.
Dwight
From: cctalk on behalf of Dave Wade G4UGM via
cctalk
Sent: Monday, May 1, 2017 9:48:52 AM
To: 'Guy Sotomayor Jr'; 'General Discussion: On-Topic and Off-Topic Posts'
Subjec
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Guy
> Sotomayor Jr via cctalk
> Sent: 01 May 2017 05:39
> To: General Discussion: On-Topic and Off-Topic Posts
>
> Subject: IBM 4331 Mainframe
>
> Just to let folks know t
Sweet!
> On Apr 30, 2017, at 9:38 PM, Guy Sotomayor Jr via cctalk
> wrote:
>
> Just to let folks know that I finally moved the IBM 4331 Mainframe this past
> weekend
> from where it was currently stored to my shop. Pictures are here:
> https://www.flickr.com/gp
On 05/01/2017 07:42 AM, Paul Koning via cctalk wrote:
On May 1, 2017, at 12:38 AM, Guy Sotomayor Jr via cctalk
wrote:
Just to let folks know that I finally moved the IBM 4331 Mainframe this past
weekend
from where it was currently stored to my shop. Pictures are here:
https://www.flickr.com
On 04/30/2017 11:38 PM, Guy Sotomayor Jr via cctalk wrote:
Just to let folks know that I finally moved the IBM 4331 Mainframe this past
weekend
from where it was currently stored to my shop. Pictures are here:
https://www.flickr.com/gp/150223282@N04/NrX91K
<https://www.flickr.com/gp/150223
Beautiful.
--
Anders Nelson
+1 (517) 775-6129
www.erogear.com
On May 1, 2017 12:38 AM, "Guy Sotomayor Jr via cctalk" <
cctalk@classiccmp.org> wrote:
> Just to let folks know that I finally moved the IBM 4331 Mainframe this
> past weekend
> from where it was cu
> On May 1, 2017, at 12:38 AM, Guy Sotomayor Jr via cctalk
> wrote:
>
> Just to let folks know that I finally moved the IBM 4331 Mainframe this past
> weekend
> from where it was currently stored to my shop. Pictures are here:
> https://www.flickr.com/gp/150223282
Just to let folks know that I finally moved the IBM 4331 Mainframe this past
weekend
from where it was currently stored to my shop. Pictures are here:
https://www.flickr.com/gp/150223282@N04/NrX91K
<https://www.flickr.com/gp/150223282@N04/NrX91K>
As can be seen in the pictures, it fille
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