The Barney Oliver from Hewlett Packard

[wayne]

Thanks for the story link on these Zero Cool it matches what Tom shared with me. I will see if I can get one going today. That volume control might just be the best part left on these.

 

[SSassen]

@Wayne,

If you can shoot and subsequently post some more pictures of the internals it would be very much appreciated. It would be nice to see how these were put together.

 

[Mosquito]

Hi, looking at the picture of post #33 it seems that for an AB class amp, of 100/150W, using the whole aluminium chassis as heatsink can be enough, no fan , no extruded profiles, just the chassis surface and a slotted top cover?
A superb aesthetics and execution, BTW

 

[wayne]

I will take some better pictures when I get back to Auburn as I have packed them up already. Both of them were tested today and worked pretty well but will need some contact cleaning and maybe a capacitor or two.

 

[Triodethom]

Those are stereo 10k daven pot on the volume control . About 125 dollars plus . they will need to be re-greased . Interesting lube it non petroleum type like pomade ( hair grease) that is not a joke . Have rebuilt a few of them that what it takes. Those are what where used in a large number of broadcast boards Collins , Gates and the like.

 

[kevinkr]

Very cool, and very rare. These were supposed to be about as good as you could do design wise at the time.