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Looking at the voltages you have listed a Microwave oven PS diode may
fill your bill. These are generally rated for 15KV at up to 1 Amp. You
may need to get creative with the mounting and wiring though.

Mitch
N4MF


--- In TekScopes@..., Michael Hann <mchl_hann@...> wrote:

Working on an old T922 and need two diodes for hv.? Tek#

152-0639-00? They are both 10kv 10mw rectifers? Have had no luck
tracking them down and not sure what to replace with.

Any help out there?? Thanks

Working on an old T922 and need two diodes for hv.? Tek# 152-0639-00? They are both 10kv 10mw rectifers? Have had no luck tracking them down and not sure what to replace with.
Any help out there?? Thanks




[Non-text portions of this message have been removed]

I have a P6106 probe that was intermitantly dropping the high
frequencies. I downloaded the manual here
and it has a schematic, but no
part values. It is the 2 meter version and has a component LR1 which
appears to be a coil wound around a resistor. Does anyone know what the
value of the resistor should be? I think the resistor was intermittant
and is now permanently open. I would like to shunt a resistor across it
to test before I go to the trouble of unwinding the coil.


I feel dumb but lucky. Dumb, because I thought the problem was the
scope and didn't even try another probe. Lucky because it got me to
look on Ebay for another scope. I bought a Tek 2232 with bad focus for
$50 and with the help of this group fixed it for the price of a 510k
resistor.

Jeff

--- In TekScopes@..., "gsohnle" <gsohnle@...> wrote:

I'm trying to troubleshoot a problem with oscilloscope. Its a
Tetronics 2246A. This is a problem that started gradually. A while
back I noticed when the oscilloscope was starting up it would click a
few times, then power up.
Now, it just clicks when starting up and never powers on. I have the
Tek 2246 service manual but everything deals with problems once the
oscilloscope is on.

I'm leaning toward a cap problem, but wanted to see what others

think.

This scope is hard to take apart.

Thanks,
George
------------------

Off course caps could be an issue here but my first choice would be
R2201. This is only 0.1 ohm and has a history of going bad i.e.
increasing value. It doesn't take a lot of increase before the supply
goes into current limit and clicks as you describe.
/H?kan

Hi,

I tried to adjust the "geometry" for the delta t lines but rotating
the geometry pot gave no change at all! I checked the connections and
the voltage, all ok.
Any clues ?

Thanks!
George

I'm trying to troubleshoot a problem with oscilloscope. Its a
Tetronics 2246A. This is a problem that started gradually. A while
back I noticed when the oscilloscope was starting up it would click a
few times, then power up.
Now, it just clicks when starting up and never powers on. I have the
Tek 2246 service manual but everything deals with problems once the
oscilloscope is on.

I'm leaning toward a cap problem, but wanted to see what others think.
This scope is hard to take apart.

Thanks,
George

Hi all...

OK I have replaced ALL the SMD electrolytic caps, all TL074 and TL072
op-amps, all 14051 and DG444 muxes. Scope still fails Acquisition
with ctlConfidencDiag, **2.50e-9<=exp<=1.20e-8 actual=4
Did I mention this was a stubborn fault.

I believe the error message relates to the CTL (U1001) attempting to
measure a 3.125 MHz clock. A member here said he obtained the same
error message. (but with actual=0 when one of the TL072s was left not
fitted after a global replacement.)
He also mentioned someone on here had got the fabled microfiches of
the Technical Reference Manual for the 540 (or 544?) which included
schematics.

If anyone can help me out with a jpeg or PDF of the page with the
Acquisition board trigger schematics I would be very grateful and
more than willing to pay for your time and effort.

Thanks and regards,
Robin Bowden

I had exactly the same problem attempting to calibrate my 2465B.Here's the fix that worked for me: After completing step 31, the instrument will step to 32, which is not shown in the manual. When this happens, press "Coupling Up" to step to 33 and 34 in order to end the routine. If you don't step to 33 and 34, the calibration constants you have so laboriously determined will not be stored and you will continue to get the Error 04 -02 message. Good luck!

Jim Garland W8ZR

Does anybody have anything available to measure visible to IR optical
wavelength? I could really use many different types of gear, what do
you have going bad on that storage shelf you want to be gone? Can buy
ro swap, but really need a working solution.

I need to characterize LED and lamp emissions from 350nm to about
1300nm. I could use Ocean Optics, Gamma scientific, Ando, Tek, help!!!

optically desperate,
walter
sphere research corp.

My 11A32 has gone bad and needs replacing. I have an extra 11A72 that
passes all tests (startup, extended, enhanced) including with a probe
attached. I am looking to trade the 11A72 for an equally good 11A32.
11A72s are currently going for a little more than the 11A32s, but
this would be a straight trade. I would prefer to keep this in the
continental US to reduce shipping costs.

email me off group if you are interested.

Hello all,
?
I am finally getting around to doing some work on my Tek 2225 scope, and it looks as though I need a replacement focus potentiometer. The part is a?"PIHER 2.2Meg 2M2 827" that withstands 2kV. Does anyone know where I might dig one of these up? (2 if possible, one for the spare parts bin). If not, could anyone suggest a suitable replacement? Thanks!!
?
Lorn
K3ALE

Scope has error 04 02 at power up and was displayying a long line of dots along bottom of screen.
?
Ran through cal a few times?and after a few attempts the long line of dots has gone but the scope still displays error 04 02 at power up! Any ideas before I run through the cal again? Seems to be working fine now.
?
Also unable to adjust step 31 and 33 in Cal 01 to meet spec. All others no poblem. I set 31 and 33 about midscale to avoid a limit indication.
?
Thanks,

David.




[Non-text portions of this message have been removed]

Sigh. After my 7904 went South, I turned on the 2430a at the weekend to
be met with an all-too-familiar smell of dead electrolytics - no HT,
but LV seems ok and front panel lights etc. seem good.

How to I open up and check the damage? I'd like to do this quickly
before any leaded gunk gets to work..

Thanks

Nick

In CAL01 the time marks are always aligned with the graticule marks.
The first time marks is always set to the left edage graticule.

The LIMIT is usually hit when the scope is way out of cal, just set it
as best as you can, the next step is usually a 4 marker per Div step.
After making the adjustments in that step the previous one will repeat
and then it should not hit the LIMIT. If it does then your scope has
hardware problems.

--Victor

--- In TekScopes@..., "bobkrassa" <bobkrassa@...> wrote:

I have almost the same subst in a later Type 132 only it is a 6G11 not
a 7G11. Works fine. Could this have been a factory substitution even
though the 6G11 sits in an adapter?

Yes, it has been roundly pointed out to me that it is a 6G11 in my
instrument, not a 7G (which doesn't exist). Sorry :)

The instrument in question is also missing all the tubes required to
use the 100x amplifier (the one that apparently was never called for
in any cal procedures), though these are much more common devices. Ah
well.

I didn't find any adapters readily for sale, so I guess I'll go for
the 'native' tube.

--- In TekScopes@..., "Don Crano" <dcrano@...> wrote:

Any one know where I might be able to get the color pens for the

Tektronix HC-100 Color Plotter? Or maybe any ideas on how or what to
use to refill the pens?

Any help would be appreciated!

Don



[Non-text portions of this message have been removed]

Don,

From some old notes I have on the Tek HC-100 plotter, it was based on
the Epson HI-80 plotter.

Some old Tek part numbers for the pens were:

Ball Point - 016-0877-00 (four colors, paper)

Fiber Tip - 016-0878-00 (four colors, oil based ink for film)

Fiber Tip - 016-0879-00 (four colors, paper, thicker line width)

Pen cartridge - 016-0876-00

Perhaps check with Epson or office supply places for pens? Granted,
my notes are from 1991 and I haven't had any dealings with the plotter
since then.

Hope this helps.

Bob

Greetings-

Looking to source an HV module for a much beloved 2213A (no wisecracks
please).

Tek P/N is 152-0806-00
a.k.a. Unitrode CMX647 (or Murata MSL8513 apparently also used).

BTW, does anyone know how much current it is supposed to draw from
the HV secondary? For kicks, it was happy with a 10 meg dummy load.


Thanks all,

Mike Z

P.S. Troubleshooting reference:

Scope works except reduction on LV supplies is
shrinking the display to successively
smaller portions of the CRT (first symptom of trouble).

Isolating power supplies revealed "lossy/leaky multiplier"
symptoms reminiscent of those described by Kevin
Chadwick (post #26366, Feb '07), i.e.,:

All P/S secondaries are pulled low 10-12% (out of regulation)
by connecting the multiplier. Disconnecting HV loads,
anode lead and -2kV output (lift R976), does not clear the issue.
Disconnecting the HV unit entirely from the transformer secondary
relieves the overload, LV supplies then regulate and can
be adjusted +/- 10% or so using R938.

Multiplier still "works" (bright trace, focus and intensity controls operate
nominally) but module gets hot and occasionally gives an audible "SNAP"
(whereupon trace winks out momentarily).

Any one know where I might be able to get the color pens for the Tektronix HC-100 Color Plotter? Or maybe any ideas on how or what to use to refill the pens?

Any help would be appreciated!

Don

Test ...new email program
Please Ignore
--
Dave & Lynn Henderson
ArtekMedia
Out-of-Print Technical Manuals
www.ArtekMedia.com
manuals@...
651-269-4265

The TM5006A power supply I am using works fine at startup. It is fully
loaded with modules. After some time (15-30 minutes) the modules in
the left five bays stop working (no power). Only the power in the
right high-power bay remains.

Since I don't have a manual of the TM5006A, and it seems to be quite
different compared to the TM5006, I would be very greatful for any help.

With kind regards,

Gerard Janssen