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Test Set Electronic Valve C.T.160

Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 301921) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 304306) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 304307) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300420) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300428) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300429) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300430) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300431) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300432) Equipment
 
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300433) Equipment
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 1795513) Equipment Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300768) Equipment
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300771) Equipment Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300769) Equipment
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 299712) Equipment Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300750) Equipment
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300753) Equipment Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300754) Equipment
Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300755) Equipment Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 300756) Equipment
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Test Set Electronic Valve C.T.160; AVO Ltd.; London (ID = 1795513) Equipment
AVO Ltd.; London: Test Set Electronic Valve C.T.160 [Equipment] ID = 1795513 697x933
Select picture or schematic to display from thumbnails on the right and click for download.
For model Test Set Electronic Valve C.T.160, AVO Ltd.; London
 
Country:  Great Britain (UK)
Manufacturer / Brand:  AVO Ltd.; London
Year: 1960 Category: Service- or Lab Equipment
Valves / Tubes 2: D77
Wave bands - without
Details
Power type and voltage Alternating Current supply (AC) / 105-120; 175-250 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: Test Set Electronic Valve C.T.160 - AVO Ltd.; London
Material Metal case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 255 x 295 x 370 mm / 10 x 11.6 x 14.6 inch
Notes

Static and Dynamic Characteristic (Mutual Conductance (mA/V))

Anode Volts: 20, 40, 60, 75, 90, 100, 150, 200, 250, 300, 400V
Screen Volts: 20, 40, 60, 75, 90, 100, 125, 150, 200, 250, 300V
Neg. Grid Volts: 0 / -40V adjustable
Anode Current: 0 / 90mA & 0 / 10mA
Set mA/V: 1, 20mA/V slop control
Mains Voltage Selector: 110, 180, 200, 220, 240V & -5 / 0 / +5 / +10V
Heater Volts Switch 0,625 -117 position:
0,625 /1,25/ 2,0/ 2,5/ 4/ 5/ 6,3/ 10/ 11/ 13/ 16/ 20/ 25/ 30/ 48/ 70/ 117V
Heater Volts Switch 1,4 - 80 position
1,4/ 3/ 4,5/ 5,7/ 12,6/ 15/ 18/ 23/ 28/ 35/ 45/ 55/ 80V

Net weight (2.2 lb = 1 kg) 11 kg / 24 lb 3.7 oz (24.229 lb)
Collectors' prices  
Literature/Schematics (1) - - Data from my own collection

Model page created by Hernani Capela. See "Data change" for further contributors.



All listed radios etc. from AVO Ltd.; London
Here you find 65 models, 64 with images and 34 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
AVO Ltd.; London: Test Set Electronic Valve C.T.160
Threads: 1 | Posts: 3
Hits: 6186     Replies: 2
avo: CT-160 (CT160); Valve Tester calibration
Paul Cornelissen
03.Nov.08
  1

Dear members,

For a few days I'm trying to calibrate my AVO CT160 valve tester. I downloaded all the mauals and articles I could find, read the calibration parts several times. Did the calibration step by step.  I checked all the resistors in the instrument (up till now I didn't check the capacitors and potmeters). Replaced the calibration resistors R3 and R4. And last but not least I made a calibration tube (ECL80) in the way it is described in the AVO manual. Checking the instrument with my new made calibration tube I found out that on the low end the Ia measurements from the AVO is a little to high (10%). In the middel it is oke and with higher Ia settings values from the AVO are lower (15%) than expected. Gm measurement is fine. Anyone who has experience with calibration of a AVO CT160? A little help is appreciated.

Regards,

Paul

Attachments

Roy Johnson
04.Nov.08
  2

Dear Paul,

I have not had experience of calibrating the CT160, but have dealt with several of the other AVO models.

The most frequent problem is the meter movement itself and I always start by checking the basic current calibration with a current calibration source.   The 10 to 15% is a typical error and seems to be due to the magnetic field change with age.   However, the apparent linearity in your case is strange but this may be because other components have been altered in an attempt to compensate the basic sensitivity and resistance.

Unless the current calibration and the resistance of the meter circuit is correct, calibration on these meters (at least the earlier ones) is impossible.   Some adjustment by the magnetic shunt on the movement can usually compensate and once this is done the calibration stays accurate for many years.

It is rather strange that AVO - of all companies - should have had this problem with meters up to and including the 163.  It may be that the problem had been resolved by the time of the 160 and that your fault lies elsewhere, but I suggest that you start at this level, if not already done,  before attempting further compensating adjustments. 

Good luck!

Regards,

Roy 

Paul Cornelissen
04.Nov.08
  3

Dear Roy,

First of all, thank you for your response. In the coming weekend I'm going to find out if the meter itself is still oke. That was something I didn't check up till now. I am going to use your suggestions for testing it.

Regards,

Paul

 

 
AVO Ltd.; London: Test Set Electronic Valve C.T.160
End of forum contributions about this model

  
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