STV280/40 Stabilovolt Valve

[pwdrive]

A fascinating gadget. I've never seen it used in anything.
What was it used in? They must have made it in reasonable quantities.
They do exist - http://www.ebay.co.uk/itm/Marconi-VS68-STV280-40-valve-Used-in-plain-box-/130959305242?pt=UK_Collectables_RadioTelevision_Telephony_SM&hash=item1e7dc86a1a

Alan

Neither have I Alan until I took the lid off that Marconi CR150, so for me it's the first time I have seen one in the flesh, not exactly sure how it's configured in the CR150, I would have to consult the circuit diagram....I shall have a look.....

Lawrence.