Huntron Tracker HTR 1005B-1 Pulse Generator/Signal Tracer Component Checker

Hi Mohamed,

There's a PDF service manual here, circuit diagram is below since it's doubtful anyone will claim a copyright on this it is four decades* old.

Hopefully it's T2 which is missing, since that's easiest to find a replacement for. T1 could be replaced experimentally (maybe winding your own), and T3 would be hard to find (high voltage plus a low voltage secondary) although something could be adapted, a lot of effort perhaps, but definitely looks like fun!

* I like this 1980's ad.. apparently, in 2021, people will still be using tapes : )

https://www.youtube.com/watch?v=uU75D5rZ_I8

Hi Mohamed,

There's a PDF service manual here, circuit diagram is below since it's doubtful anyone will claim a copyright on this it is four decades* old.

Hopefully it's T2 which is missing, since that's easiest to find a replacement for. T1 could be replaced experimentally (maybe winding your own), and T3 would be hard to find (high voltage plus a low voltage secondary) although something could be adapted, a lot of effort perhaps, but definitely looks like fun!

* I like this 1980's ad.. apparently, in 2021, people will still be using tapes : )

https://www.youtube.com/watch?v=uU75D5rZ_I8

Hi Shabaz,

I manage to find the same schematic. As you have mentioned, the missing transformer is the T3 transformer and it is quite hard to find the replacement. Maybe i need to find another solution to solve this problem.

You could make a replacement for T3 !

It looks like  a typical scope type mains transformer.

You need to find out what the secondary high voltage winding is meant to deliver, careful reading of the serivece manual can get you there.

The same winding makes 340V rectified and uses a voltage multiplier to make the 1350V HT.

The AC voltage on the winding will be 240V.

This will be hard to find, so I suggest you use 2 x 230V primary to 6.3V secondary type transformers. Wire them mains : 6.3:6.3:230V, you can take the fillament voltage from the mid point and the HT from the second transformer.

If you use torroidal transformers you can tune the ratios by adding turns to one of the 6.3V windings, the first if your outputs are too low and the second if too high.

You can easily add turns by winding some insulated wire around the outside (going through the hole of course,).

I would be happy doing all this but if you don't have some experience with working with 1.3kV, fully understand what I'm getting at, and have some test gear (meter and scope with high voltage probes) then best leave it.

Hope this helps, good luck.

MK