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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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15th Dec 2019, 4:50 pm | #1 |
Triode
Join Date: Sep 2014
Location: Bristol, UK.
Posts: 25
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Vintage Mullard Oscilloscope
Hi I have a Mullard oscilloscope I wonder if anyone has a circuit diagram and or a manual of any kind? Many Thanks Ian G6TVJ
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15th Dec 2019, 5:38 pm | #2 |
Guest
Posts: n/a
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Re: Vintage Mullard Oscilloscope
Love the handle.
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15th Dec 2019, 5:39 pm | #3 |
Octode
Join Date: Dec 2017
Location: Morden, Surrey, UK.
Posts: 1,558
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Re: Vintage Mullard Oscilloscope
It looks rather like one my Dad had many years ago although rather more complete (ie yours has a tube) He attempted to find information without sucess and he was working at Mullards Mitcham at the time.
Side contact valves? Good luck. |
15th Dec 2019, 5:45 pm | #4 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,511
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Re: Vintage Mullard Oscilloscope
Side contact valves would make it a real rarity.
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15th Dec 2019, 5:57 pm | #5 |
Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,396
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Re: Vintage Mullard Oscilloscope
There's something oddly Gothic about that tube bezel, as if it was off the Addams Family set. Maybe Uncle Fester has one in his basement workshop.
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15th Dec 2019, 6:13 pm | #6 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Vintage Mullard Oscilloscope
The GM.3156 had a similar front panel layout:
https://www.americanradiohistory.com...rch=%22mullard measuring apparatus%22 Lawrence. |
15th Dec 2019, 6:40 pm | #7 |
Guest
Posts: n/a
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Re: Vintage Mullard Oscilloscope
I am wondering just how much research/development work this old 'scope has seen. Probably too expensive for general repair work.
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15th Dec 2019, 7:26 pm | #8 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Vintage Mullard Oscilloscope
Ref. the Philips GM3156 I posted earlier, here's a link to a manual for the GM3156-01 if it's any use to anyone:
https://frank.pocnet.net/instruments...6-01_sd_en.pdf Lawrence. |
15th Dec 2019, 8:50 pm | #9 |
Heptode
Join Date: Apr 2010
Location: West Midlands, UK.
Posts: 662
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Re: Vintage Mullard Oscilloscope
Circuit and information from Quarrington Radio Circuits and Data attached.
Mike. |
15th Dec 2019, 9:06 pm | #10 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,194
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Re: Vintage Mullard Oscilloscope
Looks like a nice functional design, and I think it is the same tube used in the HSVT.
Ed |
16th Dec 2019, 3:15 pm | #11 |
Nonode
Join Date: Jan 2009
Location: Bristol, UK.
Posts: 2,062
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Re: Vintage Mullard Oscilloscope
I think I had one of those for a while !
A row of 'metal can' valves, with locking ring, inside ? dc EDIT EF50's or something similar looking Last edited by dave cox; 16th Dec 2019 at 3:28 pm. |
16th Dec 2019, 5:38 pm | #12 |
Triode
Join Date: Sep 2014
Location: Bristol, UK.
Posts: 25
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Re: Vintage Mullard Oscilloscope
Thanks for info! The scope has been broggled I may put it back to original with thyratron timebase etc. It's not in bad condition for its age.
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16th Dec 2019, 6:10 pm | #13 | |
Nonode
Join Date: Jan 2010
Location: Edinburgh, UK.
Posts: 2,008
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Re: Vintage Mullard Oscilloscope
Quote:
Al
__________________
I won't tell you how I discovered that. |
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16th Dec 2019, 7:35 pm | #14 | |
Dekatron
Join Date: Sep 2011
Location: Rugeley, Staffordshire, UK.
Posts: 8,831
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Re: Vintage Mullard Oscilloscope
Quote:
"..two external sockets, K14 and K15, are at a potential of 1,250 volts with respect to earth." Very nice.
__________________
A digital radio is the latest thing, but a vintage wireless is forever.. |
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16th Dec 2019, 7:48 pm | #15 |
Hexode
Join Date: Jun 2009
Location: Cheshire, UK.
Posts: 363
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Re: Vintage Mullard Oscilloscope
Al, (I hope Mike (Gridiron) doesn't mind me jumping in, here) "Radio Circuits and Data" appears to be a book by C.A. Quarrington.
I couldn't find out much about him on the 'net, but he crops ups on this forum. First names: Cecil Albert, according to this thread. Interestingly, and I don't know if it's the same chap, a Cecil Albert George Quarrington appears in The London Gazette in 1939, right above someone called Francis Peto Dudley Scott. I wonder if he had anything to do with Peto Scott Electrical Instruments? |
16th Dec 2019, 7:50 pm | #16 |
Hexode
Join Date: Jun 2009
Location: Cheshire, UK.
Posts: 363
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Re: Vintage Mullard Oscilloscope
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16th Dec 2019, 7:54 pm | #17 | |
Nonode
Join Date: Jan 2010
Location: Edinburgh, UK.
Posts: 2,008
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Re: Vintage Mullard Oscilloscope
Quote:
Al
__________________
I won't tell you how I discovered that. |
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16th Dec 2019, 8:31 pm | #18 |
Hexode
Join Date: Mar 2008
Location: Bristol, UK.
Posts: 388
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Re: Vintage Mullard Oscilloscope
I have a manual for the GM3156 you can have.The circuit seems identical to the one for the E800 but it lists a possibly diff.crt and it has 2 neon stabilisers.Valve lineup seems the same.possible wartime printing. it says "Instructions" on the cover but there is a circuit,chassis layout and components list. 11 pages. Les
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16th Dec 2019, 8:33 pm | #19 |
Heptode
Join Date: Apr 2010
Location: West Midlands, UK.
Posts: 662
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Re: Vintage Mullard Oscilloscope
Yes, the circuits are scans from the book by C.A.Quarrington, first published in 1948 which includes a selection of circuits of radios of the period, useful circuits and circuits of some test gear, formulae and data and valve equivalents and base connections.
The author states that the book is complementary to his "Modern Practical Radio and Television" which I believe is in 3 volumes, I only have "Radio Circuits and Data" which I was given many years ago by a work colleague. Mike. |
19th Dec 2019, 11:09 am | #20 |
Octode
Join Date: Nov 2004
Location: Hebden Bridge, West Yorkshire, UK.
Posts: 1,885
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Re: Vintage Mullard Oscilloscope
I may be being incredibly thick but it looks to me like the top part of the circuit should be driving the Y plates in opposite phase but I can't see where the phase inversion for either half happens it all looks to be in-phase to me?
D |