[Milsurplus] My Latest Project ART-13/B AM Transmitter

Mike Hanz aaf-radio-1 at aafradio.org
Tue May 29 14:01:24 EDT 2012


On 5/29/2012 9:40 AM, Todd, KA1KAQ wrote:
>> Exactly right. For some reason, the original ATC had the same system 
>> that was used on the GP-7 and ATD, all of which had a 'female' set of 
>> rails that then required mounting to an external shock system if any 
>> life was to expected from the tubes in an aircraft. 
> Interesting. Never realized they were shared with any other equipment.

Well, of course it was the concept that was shared, not the specific 
rails.  (Unfortunately...they would be easier to find these days if they 
were shared across a bunch of sets...)

> Though I had come to the realization that, even if I found a set someday,
> I'd still need to come up with a base of some sort with shock mounts as you
> mention. Was thinking along the lines of something similar to the dynamotor
> base for the RU/GF or such: a blank plate or frame with shocks beneath,
> which the slides could be mounted to.

That would work fine...and you could also include a peripheral or two, 
like one of the antenna tuning units.  I used a couple of 2x2 aluminum 
angles with four shock units under the "B-29" bay in the rig to mount a 
pair of ART-13 dynos, the ATB dyno, and the ATD dyno.  They're a bit 
less noisy if they aren't mounted on a sounding board to amplify their 
vibration. :-)

> BTW, I've got some photos of a complete TCZ set up if you'd like them. Not
> a lot of detail underneath, they just show the transmitter sitting on a
> honkin' power supply base about 2/3rds the size of a BC-610! Think I might
> even have a manual or some other documentation in the slag pile here.

 From your manual on Nick's site, it doesn't appear that they used any 
shocks - just a top hat bracket at each of the bottom corners.  Some of 
the early aircraft photos with an ATC also seem to indicate that Collins 
didn't consider shock mounts essential, though how they got any 
reliability out of the vacuum tubes is beyond me.

73,
Mike



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