I vaguely remember there was someone making replacement modules, using modern electronics. In Canada perhaps? Please help to refresh my memory ...

 

If you're thinking of the amplifier for a Delanair MkII system, here's one source:

https://www.jag-aire.com/

There is someone else making them in the USA, perhaps Texas? You'll have to search the archives for the info as I can't remember

Cheers
DD

 

Thanks! I think this is the unit I had in mind, not sure why they call it amplifier, though ... I was under impression it uses data from sensors and sets the modes for climate control. I.E., acts as a controller. Hmm, need to do some reading, I have noticed it is always better if one knows what he is doing ...

 

It does indeed take the sensor signals, then "reads" them and amplifies the resulting instruction to the extent that there is sufficient current to send to the actuation block which actually moves the flaps.
Attached is a document about it (assuming Delanair 2).

 

Thanks alot! Most useful docs. I still wouldn't call it amplifier, though. Amplifier does not perform any logic processing.