DHA gobo rotator - anyone recognize this?

[Caldair]

I found a couple of DHA single gobo rotators in storage, where they've been for a few years - long enough that there's nobody here who knows them anymore. They seem to be old enough that their manual isn't up on the website anymore (or it's because it's the Rosco site now...), so I thought I'd hear if any of you are familiar with them.

 

The only thing I'm wondering about, really, is that they're labelled "Varispeed"[1], which to me sounds like they should be variable speed, but I can't see any way of doing that. I tried turning the red knob, but that seems to be just a protective cap over the motor. Other than that, there's just the DC adapter input.

 

I can't find anything resembling a model number except on the motor[2][3], and I get the feeling that's for the motor itself.

 

More photos here. Click "All sizes" for larger size.

[Smiffy]

http://www.google.com/search?hl=en&sou...q=&gs_rfai=

 

Should cover things for you. I haven't explored any of the links that that turns up though.

 

It's been a long time but I think the speed was controllable via a DMX channel on the varispeeds. Also, I think there was a PSU type unit IIRC... Like I say, it's been a while....

 

Cheers

 

Smiffy

[Gerry]

They run off a variable 12V supply.

A model train controller provides a cheap variable 12V DC supply.

Cheers

Gerry

[The Seedage]

http://www.google.com/search?hl=en&sou...q=&gs_rfai=

 

Should cover things for you. I haven't explored any of the links that that turns up though.

 

It's been a long time but I think the speed was controllable via a DMX channel on the varispeeds. Also, I think there was a PSU type unit IIRC... Like I say, it's been a while....

 

Cheers

 

Smiffy

 

Indeed Mr Smith...

 

DHA had a small box controller that ran the speed from DMX.. Seem to recall it was also bypassable by a switch on the box that selected local control.

[sguy42]

There was also an adapter that meant you could run them from a dimmer.

 

Easy enough to make up yourself as it was only a 12V transformer and a rectifier.

 

On most dimmers it worked alot better with a dummy/ ghost load on the mains side.

 

Shane

[Caldair]

External DC regulation does make sense, from how this thing looks... A DC adapter seems to have been home-modded on there, so most probably they ran that on a dimmer. Thanks all, I'll try it out.

[Brian]

Controller on ebay