VINTAGE HUNTS CAPACITOR AND RESISTANCE ANALYSER CB3

[Bushbaby]

Thank Mike
I'll look into this and trial it first.

Best Regards
Rob

[Mike Watterson]

Yes, test on a piece of metal sprayed at least a week earlier. Some brands of baking parchment designed to peel off a cake work well. The laser printer toner is a little like soot mixed with hot melt glue, hence the final hot roller on a laser printer. Set printer to thin paper / minimise curl so it uses lowest heat and toner will more easily leave the backing sheet and stick to desired target surface.

[Paul_RK]

Hello Rob,

Here's mine, not perfect but it doesn't need to much cleaning up: I've taken the knobs off for the photo, not sure if I can do much better than this by way of excluding shadows but could certainly try.

Paul

[Mike Watterson]

The shadows and HW easily edited out.

Excellent.

[djrm]

Some people have used the iron on technique for PCB resist. 

I remember hearing about this method of making PCBs, never had access to a laser printer back in the day. I have a couple of PCBs made by a friend using laser printed film though. Maybe try it myself now just out of curiosity. D

[Bushbaby]

Thanks Paul
It also shows a lot more information than mine given that mine has slightly scratched areas.
Best Regards
Rob

[PerdioPal]

Not so many years ago it would be Letraset and a lining pen, very therapeutic (today) or relaxing (then). The last time I used Letraset, four years ago for rescaling a meter, it was so old and dry I didn't let the new paint on the scale dry too much to give some stick. Close up at a few inches it looks better then any computer printed scale.

[Mike Watterson]

Depends on how good your printer is! Also you must have brilliant Letraset skill!

The problem with computer printers is that few take metal or plastic panels. But I've done new scales for replacement meters on AVO valve testers many times and it wouldn't have been as good with Letraset. I used spray clear acrylic on 1200 dpi colour laser printed on 100gm stock glued to the metal meter plate.

I used to use it. The PC print to mask to screen printing we did in early 1980s was very expensive compared to Letraset, but more durable and accurate.

I last taped a layout on polyester using letraset style pads for ICs in 1982 for a Z80 based Eurocard. Been CAD since.

[djrm]

This is my resistance meter, "Ohmmeter No.18 Mk2" or 18B

This unit runs from a battery and has two primary functions, 
1) insulation test at 95 or 500 volts.
2) ohmmeter implemented by AC driven resistance bridge with two scale ranges

I have never found a manual or schematic for it but I think it is designed to check for leakage or to find the distance to a short on a phone line. It is branded with the Telecom 'T'  logo

I have owned it for many years, somewhere I have instructions I devised for using it as a general purpose bridge for measuring arbitrary value resistance or capacitance by adding an external reference applied to two of the three terminals, the other two being the unknown component. I have a close tolerance 10nF cap with 4mm plugs on the end for this purpose. I must find the instructions I wrote, Ive put them somewhere safe, they were on a piece of card in the battery compartment.

It is capable of measuring very low resistances, I used to loan it out from time to time to be used to measure the resistance of high power AC bus bars.

The last time I used it was for checking the leakage on some old ceramic end TCC metalpack capacitors, they were perfect.