5 Sep
2021
5 Sep
'21
1:24 p.m.
I was digging through the internet and found a post where a 3803 was posted for sale,
would there happen to still be one available?Preferably a model 2
Thanks,gcnielson at yahoo.com
5 Sep
5 Sep
2:55 p.m.
On 9/5/21 1:24 PM, Gabriel Nielson via cctalk wrote:
I was digging through the internet and found a post
where a 3803 was posted for sale, would there happen to still be one available?Preferably
a model 2
Thanks,gcnielson at yahoo.com
Aside from a couple of sales of 3420+3803 drives about 5-6 years ago,
about the only current sale is just the panel:
ttps://www.ebay.co.uk/itm/153912466858?hash=item23d5e5ddaa:g:P8QAAOSw86ZeqMBo
--Chuck
3:17 p.m.
On 9/5/21 2:55 PM, Chuck Guzis via cctalk wrote:
On 9/5/21 1:24 PM, Gabriel Nielson via cctalk wrote:
Edit: For that 5-6 year old combo, the seller was Sellam and his asking
price was $3K.
--Chuck
I was digging through the internet and found a
post where a 3803 was posted for sale, would there happen to still be one
available?Preferably a model 2
Thanks,gcnielson at yahoo.com
Aside from a couple of sales of 3420+3803 drives about 5-6 years ago,
about the only current sale is just the panel:
ttps://www.ebay.co.uk/itm/153912466858?hash=item23d5e5ddaa:g:P8QAAOSw86ZeqMBo
6 Sep
6 Sep
3:36 a.m.
I got both the 3420s and the 3808 from Sellam. On the restoration docket, now with a
better chance thanks to the ALDs which I recently got from Gabriel himself. I scanned my
3420 ALDs and gave them to Gabriel in return. Biggest annoyance, besides humongous size
and weight, is the amount of 3 phase power required.
Marc
On Sep 5, 2021, at 3:17 PM, Chuck Guzis via cctalk
<cctalk at classiccmp.org> wrote:
?On 9/5/21 2:55 PM, Chuck Guzis via cctalk wrote:
Edit: For that 5-6 year old combo, the seller was Sellam and his asking
price was $3K.
--Chuck
On 9/5/21
1:24 PM, Gabriel Nielson via cctalk wrote:
I was digging through the internet and found a post where a 3803 was posted for sale,
would there happen to still be one available?Preferably a model 2
Thanks,gcnielson at yahoo.com
Aside from a couple of sales of 3420+3803 drives about 5-6 years ago,
about the only current sale is just the panel:
ttps://www.ebay.co.uk/itm/153912466858?hash=item23d5e5ddaa:g:P8QAAOSw86ZeqMBo
4:23 a.m.
I have seen issues with 3803s in an IBM datacentres with flashover on the PSU PCB I
believe due to water absorption into the PCB material, which I believe are of the paper
type.
The flames were impressive, as was the knowledge of curses from my manager. I don't
know if this issue is common, but just thought I would mention it in case the devices in
question had been stored in damp conditions.
I should also point out that at the time I was only a Systems Programmer borrowing the
machine......
Dave Wade
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Curious Marc via
cctalk
Sent: 06 September 2021 11:36
To: Chuck Guzis <cclist at sydex.com>; General Discussion: On-Topic and Off-
Topic Posts <cctalk at classiccmp.org>
Subject: Re: Looking for an IBM 3803
I got both the 3420s and the 3808 from Sellam. On the restoration docket,
now with a better chance thanks to the ALDs which I recently got from
Gabriel himself. I scanned my 3420 ALDs and gave them to Gabriel in return.
Biggest annoyance, besides humongous size and weight, is the amount of 3
phase power required.
Marc
On Sep 5, 2021, at 3:17 PM, Chuck Guzis via
cctalk <cctalk at classiccmp.org>
wrote:
?On 9/5/21 2:55 PM, Chuck Guzis via cctalk wrote:
>> On 9/5/21 1:24 PM, Gabriel Nielson via cctalk wrote:
>> I was digging through the internet and found a post where a 3803 was
>> posted for sale, would there happen to still be one
>> available?Preferably a model 2 Thanks,gcnielson at yahoo.com
>>
>
> Aside from a couple of sales of 3420+3803 drives about 5-6 years ago,
> about the only current sale is just the panel:
>
>
ttps://www.ebay.co.uk/itm/153912466858?hash=item23d5e5ddaa:g:P8QAA
OSw
>> 86ZeqMBo
>>
>
> Edit: For that 5-6 year old combo, the seller was Sellam and his
> asking price was $3K.
>
> --Chuck 
6:50 a.m.
On Mon, Sep 6, 2021, 06:36 Curious Marc via cctalk <cctalk at classiccmp.org wrote:
I got both the 3420s and the 3808 from Sellam. On the
restoration docket,
now with a better chance thanks to the ALDs which I recently got from
Gabriel himself. I scanned my 3420 ALDs and gave them to Gabriel in return.
Biggest annoyance, besides humongous size and weight, is the amount of 3
phase power required.
From what I remember, the only thing that requires 3
phase in the whole
system is the blower motor in the 3420 drives. The rest are
powered off of
single phase 200-240VAC.
The large 3 phase input on it 3803 is likely overkill for even a controller
and full string of 8 drives. It's easier to oversize things and have a 3x
safety margin, then deal with running close to the limits and risk any
problems from poorly installed site wiring.
Pat
7:20 a.m.
The large 3 phase input on it 3803 is likely overkill
for even a controller
and full string of 8 drives. It's easier to oversize things and have a 3x
safety margin, then deal with running close to the limits and risk any
problems from poorly installed site wiring.
It is overkill, but a full string can really punish the circuit
breaker with enormous current surges. Better to overdo it with a
breaker that can handle the spike of all eight 3420s deciding to do
some reversing within a few seconds of each other.
Even a simple setup with a 3803 and a single 3420 will create large
surges that a household circuit may not like much.
--
Will
7 Sep
7 Sep
11:31 p.m.
Yes, we are hoping that we can power the blower with 3 phase and the rest directly from
the 240V electric car circuit? Not sure if that can be rewired for that.
Marc
On Sep 6, 2021, at 6:50 AM, Patrick Finnegan <pat
at vax11.net> wrote:
?
On Mon, Sep 6, 2021, 06:36 Curious Marc via
cctalk <cctalk at classiccmp.org> wrote:
I got both the 3420s and the 3808 from Sellam. On
the restoration docket, now with a better chance thanks to the ALDs which I recently got
from Gabriel himself. I scanned my 3420 ALDs and gave them to Gabriel in return. Biggest
annoyance, besides humongous size and weight, is the amount of 3 phase power required.
From what I remember, the only thing that requires 3 phase in the whole system is the
blower motor in the 3420 drives. The rest are powered off of single phase 200-240VAC.
The large 3 phase input on it 3803 is likely overkill for even a controller and full
string of 8 drives. It's easier to oversize things and have a 3x safety margin, then
deal with running close to the limits and risk any problems from poorly installed site
wiring.
Pat
>
8 Sep
8 Sep
8:25 a.m.
As long as you don't need the full blower capacity, you can probably do
the 3-phase-to-single-phase trick by using a capacitor from the third
lead to either (which one will determine rotation direction) of the two
other leads and feeding those leads with single-phase. It's done very
often here with 3-phase shop equipment acquired by residential
hobbyists. For motors, it's not critical, but it's not something that
you'd want to do for electronics--the phase distortion rules that out.
--Chuck
On 9/7/21 11:31 PM, Curious Marc wrote:
Yes, we are hoping that we can power the ?blower with
3 phase and the
rest directly from the 240V electric car circuit? Not sure if that can
be rewired for that.
Marc
> On Sep 6, 2021, at 6:50 AM, Patrick Finnegan <pat at vax11.net> wrote:
>
> ?
> On Mon, Sep 6, 2021, 06:36 Curious Marc via cctalk
> <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>> wrote:
>
> I got both the 3420s and the 3808 from Sellam. On the restoration
> docket, now with a better chance thanks to the ALDs which I
> recently got from Gabriel himself. I scanned my 3420 ALDs and gave
> them to Gabriel in return. Biggest annoyance, besides humongous
> size and weight, is the amount of 3 phase power required.
>
>
> From what I remember, the only thing that requires 3 phase in the
> whole system is the blower motor in the 3420 drives. The rest are
> powered off of single phase 200-240VAC.
>
> The large 3 phase input on it 3803 is likely overkill for even a
> controller and full string of 8 drives. It's easier to oversize things
> and have a 3x safety margin, then deal with running close to the
> limits and risk any problems from poorly installed site wiring.
>
> Pat
>
>
--
--Chuck
Sent from my digital computer
8:45 a.m.
The easiest thing to do is to pick up some cheap VFDs which will take 1ph
in and put out 3ph to run the blower motor.
Patrick Finnegan
On Wed, Sep 8, 2021, 11:34 Chuck Guzis via cctalk <cctalk at classiccmp.org>
wrote:
As long as you don't need the full blower
capacity, you can probably do
the 3-phase-to-single-phase trick by using a capacitor from the third
lead to either (which one will determine rotation direction) of the two
other leads and feeding those leads with single-phase. It's done very
often here with 3-phase shop equipment acquired by residential
hobbyists. For motors, it's not critical, but it's not something that
you'd want to do for electronics--the phase distortion rules that out.
--Chuck
On 9/7/21 11:31 PM, Curious Marc wrote:
Yes, we are hoping that we can power the blower
with 3 phase and the
rest directly from the 240V electric car circuit? Not sure if that can
be rewired for that.
Marc
> On Sep 6, 2021, at 6:50 AM, Patrick Finnegan <pat at vax11.net> wrote:
>
> ?
> On Mon, Sep 6, 2021, 06:36 Curious Marc via cctalk
> <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>> wrote:
>
> I got both the 3420s and the 3808 from Sellam. On the restoration
> docket, now with a better chance thanks to the ALDs which I
> recently got from Gabriel himself. I scanned my 3420 ALDs and gave
> them to Gabriel in return. Biggest annoyance, besides humongous
> size and weight, is the amount of 3 phase power required.
>
>
> From what I remember, the only thing that requires 3 phase in the
> whole system is the blower motor in the 3420 drives. The rest are
> powered off of single phase 200-240VAC.
>
> The large 3 phase input on it 3803 is likely overkill for even a
> controller and full string of 8 drives. It's easier to oversize things
> and have a 3x safety margin, then deal with running close to the
> limits and risk any problems from poorly installed site wiring.
>
> Pat
>
>
--
--Chuck
Sent from my digital computer
10:20 p.m.
Excellent idea! I had not thought about it. I?ll look into it.
Marc
On Sep 8, 2021, at 8:25 AM, Chuck Guzis <cclist at
sydex.com> wrote:
As long as you don't need the full blower capacity, you can probably do
the 3-phase-to-single-phase trick by using a capacitor from the third
lead to either (which one will determine rotation direction) of the two
other leads and feeding those leads with single-phase. It's done very
often here with 3-phase shop equipment acquired by residential
hobbyists. For motors, it's not critical, but it's not something that
you'd want to do for electronics--the phase distortion rules that out.
--Chuck
5 Sep
5 Sep
3:35 p.m.
On 9/5/2021 2:55 PM, Chuck Guzis via cctalk wrote:
On 9/5/21 1:24 PM, Gabriel Nielson via cctalk wrote:
There's a transformer about 2' on a side and the unit weight around
800
or 900#.? Make sure it's close, or the freight will exceed the cost,
even @ Sellam's asking price.
I sold one to a couple of guys in northern california some time ago.? I
never heard whether they got the tape or disk systems running or not.
thanks
Jim
I was digging through the internet and found a
post where a 3803 was posted for sale, would there happen to still be one
available?Preferably a model 2
Thanks,gcnielson at yahoo.com
Aside from a couple of sales of 3420+3803 drives about 5-6 years ago,
about the only current sale is just the panel:
ttps://www.ebay.co.uk/itm/153912466858?hash=item23d5e5ddaa:g:P8QAAOSw86ZeqMBo
--Chuck
970
days inactive
974
days old
11 comments
7 participants
participants (7)
-
cclist＠sydex.com -
curiousmarc3＠gmail.com -
dave.g4ugm＠gmail.com -
gcnielson＠yahoo.com -
jwsmail＠jwsss.com -
pat＠vax11.net -
wdonzelli＠gmail.com