DY-12/ART-13 Known Problems?

[SM6OID]

Hi!

Well, finally I'm the owner of a dynamotor for my T-47/ART-13.
The dynamotor seems to be in good condition, the commutators shows a nice colour and so on.
Before putting it in to service I will remove the bearings to clean and re pack them with fresh grease.
Any advice? I have NOT read the manual yet, I will... before I start to take things apart.

Are there any known issues with the DY-12/ART-13 that should be checked before someting goes wrong? 

[KF9CM]

I ran a dynamotor on my ART-13 in the 60's and it's probably one of the reasons I built a AC supply. Good idea to r&r the bearings that WWII grease is the consistency of hard wax. Be ready for the 24VDC @ 32 AMP supply you'll need to run it.

Good Luck
73 de Gary, KF9CM

[aafradio]

If the commutators are in good shape and you relubricate the bearings correctly, you should not have any problems with it.  The only other thing I might think of is to lightly burnish the relay contacts - there is probably some oxidation on them from all the years sitting on a shelf.  Listen to the bearings when you get the dyno powered up.  They should not make any noise whatsoever.  For any other problems, you might take a look at http://aafradio.org/docs/Dynamotors.html  

[W7SOE]

Earplugs?

 

Rich

[aafradio]

Heh...not a bad idea.  While the bearings should be silent in operation, the end bells are open and there is more than enough brush commutation and fan noise to go around.

[SM6OID]

Well, I do not expect the dynamotor to silent...   
I would guess that I will build an AC operated power supply later, sooner or later.
But first I must find the transformers that I put away some 15 years ago. 

[W2PFY]

Well, I do not expect the dynamotor to silent...  
I would guess that I will build an AC operated power supply later, sooner or later.
But first I must find the transformers that I put away some 15 years ago.  

How did you find an ART13 & Dynamotor is Sweden? Did the US leave a lot of stuff over there after WW2?

[W2VW]

When these were first used operators were often shot at. Use caution.

[KD6VXI]

Well, I do not expect the dynamotor to silent...  
I would guess that I will build an AC operated power supply later, sooner or later.
But first I must find the transformers that I put away some 15 years ago.  

How did you find an ART13 & Dynamotor is Sweden? Did the US leave a lot of stuff over there after WW2?

With the cost of returning it, the US usually leaves things.  It's cheaper for them to write it off and repurchase it, ends up helping the companies "back home", and everyone's happy.

Unless it's 'top secret'... LOL.

--Shane

[SM6OID]

 Well, I had to buy the dynamotor from the US.
The customs missed the opportunity to add 25% VAT to the sales price + shipping cost!!
Thank you very much for that!!!!   

 My T-47/ART-13 is "Swedish", or more correct:
It was used in a civil aircraft, probably a DC-3 operated by Linjeflyg.
I do not know for how long it was used. But I would suspect that it has not been used since it left its "professional career". As far as I can see, there are no modifications done to it.
Well, the wire that feeds RF from the PA has been cut of for ½ inch. I guess that this was done when it was sold from the aircraft operator, kind of disarming the transmitter. (?)

 As far as I know, there are not many ART-13 operators here, I know of one guy that sometimes uses his ART-13. Wireless Set No 19 is “quite common here”. Not that every ham has got one… Do I have to mention that I’ve got one too?  

 It will be great fun the get the ART-13 up and running, I’ve got a BC-348-Q in quite good condition, unfortunately the dynamotor is gone. (surprised?) It has got an external power supply, which is good. Probably some minor modifications have been done to it.
Maybe they will work together some day, time will tell. Or I will use another boat anchor as a receiver.

 I hope that I can have QSO’s with the users of this Forum when the radio equipment works.       

[WU2D]

The dynamotors in transmitter service usually have an integral vane fan that can make a real racket. My ARC-2A XCVR dyno can drive you out of the room. The dynamotors in my BC348 and BC-652 receivers however, are almost silent.  Mike WU2D

[Todd, KA1KAQ]

My first exposure to a fully-functional-with-dynamotor ART-13 set up was at Hosstraders in Rochester, NH back in the late 90s. Big Al K1JCL had one set up in his military shelter that he towed to the hamfest. I remember seeing the ballet of dials slooooowly turn when he switched channels with a low, whirring sound, and the "weeEEEEEEEE" that the dynamotor produced as it spooled up each time Al keyed the T-17 mic.

That was the day I decided I really loved dynamotors.  My ATC version has its dynamotor with it, just need to find a few more connectors. It will be paired up with the Navy RAX triplets pictured in the PB4Y manual shots on KC4TOS/Mike's AAFRadio Flight Deck pages. Still a few pieces needed for the RAX sets too, but it's getting there....slowly. Too many projects/distractions, to which many here can relate.

[Bill, KD0HG]

I think it would be cool for someone (NOT ME) to organize a "Dynamotor night"

I had approached Barry, N6CSW, editor of ER, years ago about the concept, nothing ever became of it.

The concept being an evening QSO party, where at least one piece of the station equipment was powered by a dynamotor. Receiver or transmitter.

My ATC/ART-13 uses an AC supply, but I could use any of several Command Set receivers with their 24 VDC dynamotor supplies.

Listen to the whine!

Anyone else on board with the concept? Or am I just a whack job- as usual.

[KC4ALF]

I like the idea of a Dyno nite.

[AJ1G]

Count me in!

WS19/Dyno PSU - Sounds like rocks in the races, amazed it still runs!
TCS12 TX/RX/Dynos Smooth and quiet
GRC9/DY88  Low hum from Telefunken dyno buried in a stiff case
ART13/DY17A - WHEEEEEEE!
T19/ARC5/BC456/DM33 - Smooth and quiet high RPM
BC191/BD77 Smooth low speed hum
T195/GRC19/HV AND LV dynos Growl/rumble masked by screaming blower
Command set receivers/dynos
BC652A receiver/dyno
ARB receiver/dyno
BC654/PE103

The command set originally was powered by a DY8 that had a three digit serial number.  If that dyno could talk it probably would have had an interesting story to tell....

The PE-103 was acquired from Eric, WB2CAU way back in the day in trade for a cup of my XYL's chili at a fall Deerfield Hosstraders.

[SM6OID]

 Hi!
Well, as soon as I get my stuff working, I'll do my best to make my voice heard!
Probably with the weeeeeeeeee..... in the background.   

[W2PFY]

I like the idea of a Dyno nite.

I don't have a class E rig yet but I wonder if there are any low voltage dynamotors with high amps out there? Most of them are about 220 volts and up.I've seen some 28 volt gas generators. Just thought it would be fun to run a class E rig with one. I think it would require about 120 volts at a few amps to do it.

[aafradio]

There are no dynamotors within that envelope that I know of, Terry.  However, you could get the same effect with an MG-149 rotary inverter and a diode bridge.  That'll get you almost 5 amps at 115vdc.  The MG-149 was the mainstay of the late war progression to 400Hz in the USAAF, since they didn't rely on engine driven alternators like the Navy.  It's roughly the same size as the BC-375 or ART-13 dynamotor.  Fair Radio had a bunch of them at one time, and in fact that's where I obtained one of mine.  There's a photo I took of a pair of them when I was doing some restoration in the Enola Gay at the bottom of http://aafradio.org/NASM/Navigators_Station.htm

The advantage of using the MG-149 would be its 400Hz frequency - easier to filter.  Plus, it's difficult to eliminate that subtle 400 cycle note if you're using voice...

[W2PFY]

Nice link, I thought that air plane was in the Smithsonian? It was when I visited the area more than thirty years ago.

Yes, fair radio still sells those 400cps inverters. I just realized that I have a Redi Line inverter (MG type) and it's good for 500 watts. The voltage sags a bit under heavy load. Now thinking about those 400cps units, these new toroidal transformers would work great with them and would be much better than 60 cps.

[aafradio]

It's at the NASM Udvar-Hazy annex near Dulles airport.  http://aafradio.org/NASM/Enola_index.html has more.

[Opcom]

Be ready for the 24VDC @ 32 AMP supply you'll need to run it.

Good Luck
73 de Gary, KF9CM

Let's not forget the 100A surge or so to get it started.

[AJ1G]

Let's not forget the 100A surge or so to get it started.
[/quote]

That's why I use batteries (single or two in series for 28V gear) across the output of the power supplies - without them you will likely trip your supply output breaker when starting the dynos up, especially big ones like those in the T195/GRC19 for HV and the ART13 DY17A.  Just be careful that your supply output voltage isn't so high that it will overcharge the batts while running the radios for extended periods.

[Opcom]

Occasionally a 28VDC-115V/1KVA/3 phase/400Hz dynamotor shows up. That would come close to the needs for a Class E transmitter.

The WEEEEeeeeee... of a dynamotor is an analog of the kerchunk.

The Black Hole of Los Alamos had a quite large one there at my last trip. I think it was 28V input@190A, 120V out, maybe 2KVA, weighed about 150-200 lbs and had a lifting eye on it.

There is a 500VA one on ebay right now.