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Author Topic: 1970s HH amplifiers brought back to life.  (Read 9466 times)

Mike Diack

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Re: 1970s HH amplifiers brought back to life.
« Reply #20 on: May 22, 2015, 05:47:02 pm »

The OC71 was the low power version.  Scrape off the paint and you turn it into an  OCP71 phototransistor! (I think I remember that correctly).

Until those rotters at Mullard caught on and started filling them with opague thermal goo instead of the transparent stuff. I guess they were annnoyed at loosing out on the extra five bob they could charge for the OCP version. I suspect JR doesn't recognise these because they wear bowler hats and drink tea.
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