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Old 10th Jun 2021, 2:21 pm   #1
Cobaltblue
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Default Cossor Oscilloscope models numbers required

Hi All

I have started to collate the Cossor Test equipment and have decided to start with the oscilloscopes.

I have found a number though ownership, book references or sales information.

Below is a list I have identified to date of course some of the more common variety's such as the 1035, 1039, 1045 and the CDU 150 had a number of different versions I think I am aware of most of them.

Model-----Picture---Service info

339---------y----------y
1035--------y---------y
1043--------y---------n
1049--------y---------y
1052--------y---------y
1058 -------y---------y
1059--------y---------n
1060--------y---------n
1063--------y---------n
1064 -------y---------n
1065--------y---------n
1076--------y---------n
1091--------y---------n
1099--------y---------n
2000--------y---------y
2100--------y---------y
3100--------y----------n
3247 ------------------n
3248-------------------n
3332--------y----------n
3339--------y----------n
4100 --------y----------n
1039M-------y----------y
1045K-------y----------n
1071K--------y---------y
CDU150-----y----------y

Are there any model numbers I have missed ?
Does anyone have a Cossor scope, sales info or advertising material with numbers I don't have?


The 3247 and 3248 appear in a booklet and have a dates of 1935 and 1936 the booklet is dated 1936 and doesn't show pictures of the complete oscilloscopes.

I also have to sort out the accessories and plugins /external units. but that's for another day

Looking forward to lengthening the list

Cheers

Mike T
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Old 10th Jun 2021, 5:58 pm   #2
frsimen
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Default Re: Cossor Oscilloscope models numbers required

Hello Mike

Two more CDU models are the CDU110 and the CDU130

Paula
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Old 10th Jun 2021, 6:06 pm   #3
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Default Re: Cossor Oscilloscope models numbers required

Thanks Paula

That's appreciated.

Cheers

Mike T
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Old 12th Jun 2021, 7:06 pm   #4
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Default Re: Cossor Oscilloscope models numbers required

Posts concerning the 339 and 339A moved to this thread.

https://www.vintage-radio.net/forum/...27#post1381827

Cheers

Mike T
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Old 13th Jun 2021, 9:39 pm   #5
WME_bill
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Default Re: Cossor Oscilloscope models numbers required

Mike.
Some more Cossor Oscilloscopes for your list:
CDU110. picture, manual, actual specimen. Transistor with couple of Nuvistors. Dual trace, delay TB. 20Mhz. Wireless World July 1966. tube Brimar D13/33, unusual as X is higher sensitivity.
CDU120. poor picture, poor manual. Dual trace, delay TB, 60Mhz. W.W. 1969. Appears commercial version of CDU150/CT531. Tube TFK D14/131 or GEC-MOV 1474B.
CDU100. First transistor scope+ couple of nuvistors. W.W. Feb 1964. 35Mhz, beam switching. No details.
CDU130. portable. 15Mhz. picture. No details.1967.
CDU150 / CT531. 35Mhz, dual trace, trigger delay. 5" tube TFK D14-131 or GEC-MOV 1474B. picture, manual, actual specimen.1969.
CME110. cable tester using TDR. effectively small portable scope. picture, user manual + circuit, actual specimen. Transistor. Tube 3" DH7-11.
Made by Cossor, and later versions marketed by Biccotest Instruments,so became Biccotest T213 cable fault locator. Full manual. about 1972. Also later version T233.
1071K. Split dual beam, 3Mhz. poor picture, full manual. Sold as Kit or factory assembled. All valve. Tube 4" Etel 92D split beam assymetric.1959.
1045K. Single beam kit. Probably similar to 1071K. poor picture only and specification. 1960
1091. Improved 1071K. picture and sales specification only.
1052. Picture of front panel and circuit.
1058. Single beam,4" tube. DC to 6Mhz. picture and specification.1960
1063. Strain gauge display. "Hydraudyne" with DC coupled single beam long persistence tube. 1956. poor manual, worse picture. Brimar valve types. Etel 4" tube 91L.
2300. Double gun,4" Brimar SE4/2B or GEC-MOV 1074H. DC to 200khz. picture and full manual. W.W. 1966.
1039M Mk1. picture, full manual, actual specimen. 3" tube Etel 23D or Mullard ECR30 or VCR139A.
1039M Mk2. Different from Mk1. picture and manual. 3" tube Etel 24D or Mullard DH7-91. Much better performance.
1035 Mk1. Manual. 1949 and 1954. Split beam 4" tube, assymetrial deflection Cossor/Etel 89D. Cossor valve types. Manual includes Camera 1428 and Motor drive 1429 including pictures. Bandwidth 1 to 7 Mhz.
1035 Mk2A. 1957. Identical to Mk1. Some different valve types, US/Brimar equivalents. Circuit only.
1035 Mk3. 1958. Very different from Mks 1 & 11. Tube 4" split beam, asymmetric deflection, Etel 93D, Mullard DHM10-93, US 4LP31. Y bandwidth 7Mhz, Trigger delay. Actual specimen. Manual.
1036 and 1037. 1948, use B8B loctal valves. No info, but perhaps an export version of 1035 Mk3.
1049 Mk1. 1950. DC coupled. 100khz. Split beam, assymetric. Tube 4" Etel 89D or 89J. Cossor/Etel valve types. Circuit
1049 Mk3 1954/55. As Mk1. circuit. Manual and picture.
1049 Mk4 1959. Circuit, as Mk1. Some valve types changed, unchanged circuit and performance. Circuit
3100 (also CDU160). 1972. manual and picture. (launched 1970 as CDU160 at 30Mhz ) uprated to 40Mhz, and then 50Mhz. tube Mullard contract type 95449. Appears as Mullard D14-121. Actual specimen.
4000 50Mhz, dual trace, dual (delayed) timebase. manual and picture. Appears to be uprated CDU150.
4100 75Mhz, dual trace, dual (delayed) timebase. 1973. Tube TFK D14-220. full manual with pictures.
3339 I have the circuit diagram, from data provided by David Simpson in Aberdeen. 1938/9. The original version, using a very odd voltage doubling rectifier, Cossor 225DU. poor picture.
339 The 1941 war time version, using 807 instead of 42SPT video pentodes, so the Y bandwidth and sensitivity is much less than the 3339. Manual and poor picture.
wme_bill.

Last edited by WME_bill; 13th Jun 2021 at 10:02 pm.
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Old 14th Jun 2021, 8:09 am   #6
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Default Re: Cossor Oscilloscope models numbers required

Hi Bill

Thanks for all the info some new models in there as well.

I will reedo my list later

Cheers

Mike T
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