I have had this valve tester for quite a while now and think it is about time I repaired it.
A link to a circuit diagram would be just as good as a file or a printed copy.
Upon opening the unit I found there were 3 dry cell batteries which I would very much like to replace with a regulated power supply, but, in order to do this I need to know exactly where these batteries come into the circuit.
The batteries are:
1 x Eveready 950 (1.5 volt "D" cell battery)
2 x Eveready 793 (9 volt grid bias battery)
If anybody wants to pay the transport costs, they can have them.
If you want to see pictures of the batteries first, just ask and I will put them on my web page with an easy link.

Hi Bob,

Have a look in your inbox.

Cheers, Graham...

Mine is a VCT-V which is actually valve & circuit tester. This is an early version with multimeter etc. and only a V1 as rectifier. It only has the batteries to drive the lower ohms range.

This has also the factory 6V Vibrator PSU as well as mains.

Check the meter movement. The one in mine has a recessed screw directly behind the clamping bracket that holds it in place. It was quite obvious that mine has done a lot of rough country miles.

That screw had vibrated loose allowing a clamping part within, to be freed and the screw to touch the bracket.

That caused the movement to require new springs as it shorted and destroyed them. Meter rebuild will relieve you of over $100.

If yours is the same, ensure that there is insulation between the movement and bracket and steps are taken to discourage the screw from moving.

Marc

Thank you Graham for the manual and circuit ..
I have put a copy on my webpage at
http://www.aescomputers.net/Schematics/Test equipment/VCT-2.pdf
for all to access ..

Thanks Marc for your comments about the meter movement ..
Luckily I used to repair camera meters so it will not cause me too great a concern ..
Please note everybody .. I have given up camera work so please don't ask me to repair meters or cameras ..

- Bob

I have a Palec VCT-2 tester, which I am hoping to get going. I have looked at the circuit mentioned above but mine seems to be a tad different, there is no rectifier valve in it so I assume it is purely AC voltages supplied, it does have the 2 lots of batteries which show 1.34v & 13.5v at present, the only battery I could see on the circuit above was 4.5v
any ideas on what this unit is, perhaps a later guts in an older case????

I have seen one of the VCT-V derivatives put in the wrong case, however everything is attached to the facia so it's not really possible to hide what it is.

One of the derivtives was military & was made by Transmission Products.

The 9V is probably for Megohms as VCT used internal power for that and the 4.5V for the other ohms ranges.
VCT-V can test bonding (low ohms).

Putting AC onto the valves was not unusual.

VCT-V is 1938

Marc