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Hi,

I just picked up a P6015 HV probe and am designing a replacement P6015A compensation box as the BNC on mine is broken and I want to add Tekprobe functionality (plus allow easier adjustment with silicon oil in place of Freon) etc.
The schematic is really poor quality in the manual on the Tekwiki, but I have figured out all the component values except I'm not sure about trimpot R7.

Can someone who has a P6015A take a peek inside and let me know the value of this trimpot?

Thanks!

Jared, on my one of my 6015A R7 is 500 Ohm, Bourns 3362 cermet.

clear schematics should be easily available.

PM me if you want a scan off my paper manual.

jon

Jared, Ijust have re-read your post, it seems like you want to convert 6015 to 6015A, can you please clarify your intentions?

These are different "animals"

I believe that cables, comp box and tip capacity are all different between 6015 vs 6015A.

I hope that our veteran TEK folk can inform us the details.

I can't imagine that the results of your conversion will be accurate for BW or transient response,

BON CHANCE!

Kind Regards

Jon

My probe seems to work ok, but being the earlier model it needs the unobtanium Freon to work at it's full specs, so I was thinking of filling it with silicon oil like the A model, but that changes the characteristics which can mean the non-A compensation box ends up at the ends of its adjustment range.
I figure seeing as the actual probe body is basically the same (AFAIK), replacing the compensation box along with the silicon oil should work together to operate ok, and give me the Tekprobe functionality too.

Should be an interesting experiment, I have some gear to characterise it (good scopes, PG506, etc etc) so worth the experiment I think.

Jared: Interesting idea.

It is still possible to obtain Freon dependng on your location.

Beware that the gas seals and design of P6015 may not be compatible to some silicon iols and that there are various viscosity and properties of these oils.

You might look out for some 6015A Junkers..

Jon

Yeah, it would be great to find out what oil is used by Tek in the P6015A, but they seem to be a bit tight-lipped about it...

Jared,

I thought I had read somewhere that you could fill the body of a P6015 with butane. I don't know if it gives the same dielectric properties, and, of course, it's flammable. I assume that you could use a number of other low-boiling point liquids to similar effect. Maybe one of the replacement refrigerants could be used? I know that some of the new refrigerants are corrosive, and will destroy the seals in an AC system over time. I have no idea what they might do to a P6015.

-- Jeff Dutky

Yeah, I read the same. Butane has a similar vapor pressure to Freon so it apparently works well, up to and in excess of the working voltage of the probe.
However, the flammability is a concern....

The main problem with other refrigerants is finding one with a similar vapor pressure, too high and you may end up with a little grenade in your hands...


Jared