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Title: Need info on 5 inch scope Post by: w1vtp on March 12, 2015, 02:41:42 PM Picked this scope up recently. It looks like it's a Millen 5 inch wanna be scope. Who made it and is there a schematic / manual available
I have a new in box Millen scope amp / sweep unit that may work on it Thanks, Al Title: Re: Need info on 5 inch scope Post by: w1vtp on March 12, 2015, 02:42:36 PM Final pic
Title: Re: Need info on 5 inch scope Post by: KA2DZT on March 12, 2015, 02:57:50 PM The knobs look like GR knobs, but don't think GR ever made scopes.
Fred Title: Re: Need info on 5 inch scope Post by: W3RSW on March 12, 2015, 04:35:51 PM Looks kind of unfinished. All those 12ax7s have fils hooked up but apparently little else.
Hor. and vert amps ? Oh well, CRT ok hopefully. Title: Re: Need info on 5 inch scope Post by: Opcom on March 12, 2015, 08:09:57 PM Instead of unfinished, I suggest stripped for re-purposing.
Looks like an in-house built equipment, part of acquisition system of old if the Memory connector means anything. Possibly part of a military and or research program. Singer used CRT bezels like that a very long time ago. I would like a peek at whatever refrigerator-sized "memory" went with it. Could have been "Russian Memory Device" a chart recorder. I have many similar items in my collection. Beware you may become a CRT fiend! The black transformer is just for the CRT filament insulated to a high negative voltage. If it is still the 5UP1, depending, it may have run on a low voltage in there like 1500 with the cathode very negative and the deflection plates at the anodes of one of those 12AX7s, a couple hundred volts positive. Usually there is a separate small HV rectifier tube like a 2X2 when the voltage is any more. 5UP1 is an easy to use tube. Title: Re: Need info on 5 inch scope Post by: WBear2GCR on March 12, 2015, 08:17:55 PM From the numbers for the tubes, and the front panel being screened (?) labels, it would need to be commercial, or at least from the proto shop of a mfr... I'd agree from the photos that this has been stripped and parts removed. Is there a HV supply there? Does the silver label on the big transformer say anything interesting?? Neat find, but what in the world could you use it for?? Would make a neat "scope clock" - fwiw. _-_-bear |