[Milsurplus] Dynamotor inrush

Thu Aug 22 15:34:28 EDT 2024

Mark..when the bases were being shut down here in the(SF Bay area) a lot of
these supplies showed up NIB for $150..and then pretty soon $100. I bought
two. Since then they  show up here like new in most cases for $50.. the
main reason for this is " they are too heavy to move" I bought 2 more, one
for the work/test bench and the other for a radio operating postion.
How many times do you need to move it ???...and if you do, get a
inexpensive moving dolly from Harbor Freight or make your own with 4
casters,  that's what I did.
Paul
N6FEG

On Thu, Aug 22, 2024, 11:32 AM Mark K3MSB <mark.k3msb at gmail.com> wrote:

> I replied to Paul earlier
>
> "And I would get one if i could find one!"
>
> Within driving distance...
>
> Mark K3MSB
>
> On Thu, Aug 22, 2024, 2:29 PM Tom <noflood1 at sonic.net> wrote:
>
>>   Also using a PP-1104, affectionately known a "Ampszilla", to spin a
>> DY-17 dynamotor for an ART-13. I originally ran it on a dedicated 30 amp
>> 120 volt circuit and then restrapped for a 15 amp 240 circuit, it ran much
>> better.
>>
>>
>>                                                     W6TOM
>>
>>
>>
>> On 2024-08-22 10:03, Paul Thekan wrote:
>>
>> I use a PP-1104 C/G power supply.
>> 28v@ 50A or 12 v @ 100. I believe the supply was originally intended to
>> be used for charging fork lift batteries.
>> It is a great suppy and had never bogged down...except once 30 yrs ago
>> when I was going to  turn on a T-195 xmtr I'd just  got.
>> I turned on the xmtr ..and immediately a big groan came the power
>> supply..the lights in the garage dimmed..and the 40 amp fuse on the Xmtr
>> blew.
>> The xmtr was stored somewhere damp with the air flow cover open and I
>> guess the moisture formed a film on the comutators that formed a short. Got
>> them cleaned up ..no damage and the T_195 was fully operational and on the
>> air.
>> Use the supply on ART 13s, BC 375s, BC 191s as well others..
>>
>> Paul
>> N6FEG
>>
>> On Thu, Aug 22, 2024, 9:40 AM Mark K3MSB <mark.k3msb at gmail.com> wrote:
>>
>>> That's why it's on a floor mover from Harbor Freight!     Easy to roll.
>>>
>>> Mark K3MSB
>>>
>>> On Thu, Aug 22, 2024, 11:34 AM Jim Whartenby via Milsurplus <
>>> milsurplus at mailman.qth.net> wrote:
>>>
>>>> Moving it must put a strain on your back!  <grin>
>>>> Jim
>>>>
>>>> Logic: Method used to arrive at the wrong conclusion, with confidence.
>>>> Murphy
>>>>
>>>>
>>>> On Thursday, August 22, 2024 at 08:33:16 AM CDT, Mark K3MSB <
>>>> mark.k3msb at gmail.com> wrote:
>>>>
>>>>
>>>> That's what I do for my SCR-274N setup.    A pair of tractor batteries
>>>> in series across the 28V PS Output,   I don't have any problems.
>>>>
>>>> [image: image.png]
>>>>
>>>>
>>>> On Thu, Aug 22, 2024 at 8:58 AM CL in NC via Milsurplus <
>>>> milsurplus at mailman.qth.net> wrote:
>>>>
>>>> I think most folks just run a pair of car batteries in series for those
>>>> big loads with a charger in place to keep things up to snuff, but with the
>>>> price of batteries today, a big enough switcher supply is more affordable.
>>>> A 24 volt supply is usually cheaper than a 28, sometimes by a lot, and you
>>>> can adjust them up to about 26.5, no real reason to run 28 as there was
>>>> only 28 when the aircraft engines were running, 24 when not.  Meanwell
>>>> supply's are very radio quiet.
>>>>
>>>> Charlie, W4MEC in NC
>>>>
>>>>
>>>>
>>>> ______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> ______________________________________________________________
>>>> Milsurplus mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Milsurplus at mailman.qth.net
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>>> ______________________________________________________________
>>> Milsurplus mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Milsurplus at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>> ______________________________________________________________
>> Milsurplus mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Milsurplus at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20240822/c1051e80/attachment.html>