Yes, I do have the manual which includes schematics (and even the winding details of the power converter transformer!). I definitely want to scan the schematics when I get chance. My old office had a really good scanner, and sadly the new one doesn't so I'll have to go to the copy shop down the road.
The manual runs to 78 pages plus schematics which are all odd sizes.
Incidentally, browsing the manual just now, it becomes clear how the X-Y mode is implemented. There's an X output on pins 15A/B of the plugin interface, and a Y output on pins 25A/B. The vertical amplifier plugin also has its signal output on 25A/B, which differs from the Tek allocation (11A/B). Trigger output is on 13A/B the same as Tek, though.
The mainframe has an X-axis switch for each plugin as well as a Y-axis switch, it turns out, so plugins are allowed to generate both X and Y signals. Interesting.
I wonder how the
Chris
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On Fri, Jul 6, 2018 at 06:32 am, Artekmedia wrote:
I think you said you had the manual as well when you get a chance
perhaps you can scan the schematics and post them here or on KO4BB. It
would be interesting to see how they accomplished some of these features
Cheers
Dave
manuals@...
On 7/6/2018 8:50 AM, cmjones01 wrote:
Good question, I wondered that too. I've just tried out the plugin in a
mainframe for the first time and noticed two things. First, it has readout!
The current and voltage per division are displayed, together with the mode -
'n' for N-type FETs and 'npn' for NPN bipolars, and so on.
It doesn't need help from any other plugins to do X-Y mode, so the plugin
interface must have been changed from the Tek one (though I've already
observed that a lot of the signals are in the same places). The plugin has a
'measure' button which seems to enable and disable it. I've no idea how it
interacts with having a timebase in the horiztontal slot. Perhaps it's handled
gracefully, perhaps it all becomes a terrible mess, I'll have to try it at
some point.
There's a picture of the tracer in action on a pair of IRLB3034 MOSFETs I
found lying around on the bench. They're switching MOSFETs so they don't make
very nice curves, but it's possible to see that the two start to switch on at
different gate voltages. I presume the looping visible is because the slope of
drain current against gate voltage is so steep, so even the tiniest variation
in gate voltage results in visible loop.
/g/TekScopes/photo/62315/3?p=Name,,,20,1,0,0
A neat feature is that device 'A' is displayed with a solid trace and device
'B' gets a dotted one so you can tell them apart. The buttons on the adapter
each *disable* one of the devices momentarily, otherwise they're both
displayed all the time.
Chris
On Fri, Jul 6, 2018 at 05:22 am, Dave Casey wrote:
Interesting....but how does it do X-Y mode?
Dave Casey
On Fri, Jul 6, 2018 at 6:01 AM, cmjones01 <chris@...> wrote:
It was with some excitement that I unpacked today's new acquisition. From
a surplus dealer in Ukraine, via some helpful friends in that country,
I've
got my hands on the §Á4§³-92, the Soviet version of the 7CT1N curve tracer
plugin. in its original transit case with an almost complete set of
adapters and its original manual and calibration certificate dated 1988!
It's not new old stock and has definitely been used, but the seals on the
plugin are intact.
There are five different adapters which fit on the front of the plugin,
one for two-lead devices and the others for various transistors and FETs.
They all have two buttons for comparing devices, and little plastic lids
with a microswitch to enable the tracer when they're safely closed. The
only bits which seem to be missing are a couple of connector blocks which
seem to have something to do with the calibration process, but I'm not too
worried about those.
I have to say that the Soviet makers have the edge over Tektronix when it
comes to the sheer robustness of the packaging. It's a plywood box with
steel corner protectors, lined with polystyrene and foam to fit all the
parts. The whole thing weighs about 10.5kg (23lb).
Pictures here:
/g/TekScopes/album?id=62315
It'll be fun learning to drive it, and it will be really useful in the
lab, too.
Chris
--
Dave
Manuals@...
www.ArtekManuals.com
