Gotham PFB-150WA cutting system x2

[dietrich10]

Two working with new tube Gotham mono tube cutting systems

$3000 each + shipping
Will need proper wood crating

[uvoscillator]

this one is for feedback grampian heads ?

[dietrich10]

Yes made specifically for feedback Grampian heads. Can use with other heads of course

Selling for a friend(not internet savy). His plan was to make a controller to bridge these for stereo use on his Neumann lathe. He has too many other unfinished projects.

[tubefan]

To use with other feedback heads it needs a feedback amplifier. Not necessarily a complicated one, I think a Heathkit UA1 might even work. (little flat adjustable gain EL84 amp). Grampian has a funny feedback setup where the feedback coil is wound bifilar with the drive coil, so it is a low impedance coil, not high impedance like on Westrex Fairchild etc...

[tubefan]

They sound really great with the Grampian head... makes me want to mix and cut mono 45's for free.

[uvoscillator]

They sound really great with the Grampian head... makes me want to mix and cut mono 45's for free.

damn, looks I need to sell my gramp to buy an amplifier for it

[dietrich10]

1 sold and 1 remains

[dietrich10]

one still here

[dietrich10]

Still got a mint system!
spare tubes!

[audiocarver]

I would jump on this, but not sure how to gang the two together?

[dietrich10]

There is only one mono unit left for 3k+ship+packing

[jamesfabel]

Hi dietrich

Do you still have one mono unit left?

I have a Grampian Cutting Head type D mono

and this might be the correct amp for this system?

Thanks
Jamesfabel