I have a TM-501 that looks like the Bridge Rectifier (CR-10) has
died. Probably wiped one of the caps too. Does anyone have any of
these ?

P/N 290-0577-00 2000 uF Cap (Need 2)

P/N 152-0488-0 Bridge Rectifier
(or what the pin connections are !!)

Tnx Dick, W1KSZ

--- In TekScopes@y..., "wshawlee2" <walter2@s...> wrote:

Many thanks to those who posted links to possible reservoirs of the
wavestar early versions that might work with my 2221A. amazingly,

in

every case, the files are now gone, as they linked back to the Tek
FTP server, and the old versions have been deleted there. sigh.

I remain hopeful, but I confess I am (tek) blue over this whole

issue.

Hey ! Don't lose your hope. WSTR0DEM just changed its extension
from .zip to .exe (AFAI see). To get it, you just have to log-in to
ftp://ftp.tek.com/mbd/support/ , and then download WSTRODEM.EXE. Or
just click (or cut and paste) this link (
ftp://ftp.tek.com/mbd/support/wstrodem.exe ) into your browser, and
there you go !!!
Tell me if I can help you on this.
Regards
Gaston

Made a typing error,should of been 474 scope.Thanks to everybody again.


Bill

Many thanks to those who posted links to possible reservoirs of the
wavestar early versions that might work with my 2221A. amazingly, in
every case, the files are now gone, as they linked back to the Tek
FTP server, and the old versions have been deleted there. sigh.

I remain hopeful, but I confess I am (tek) blue over this whole issue.

ON a marginally more positive note, does anybody need a 564B CRT?
I am breaking up an old unit, tube and filament looks Ok, but no use
to me, if somebody will pay the postage to ship it. I also have
posted a bunch of cleaned older Tek knobs up to our site for those
refurbing older 500 series units. More going up later today that are
in the later "dark gray" style.
http://www.sphere.bc.ca/test/tek-parts/tek-knobs2.html

Suzie is going to Portland next week to pick up a case of Tek blue
paint in spray cans, we just couldn't figure out how else to ship it.
we will have a lot of it, if anybody wants to drive up here to BC to
get it!

all for now,
walter

http://www.sphere.bc.ca

Thanks to everyone who answered my question on the 465 scope probes.I really
appreciate the help.


Bill

Can someone tell me what probes are compatable with the 475?If the list is
to long can u tell me where to look.I go on ebay sometimes but i don't know
which ones to bid on.Any help would be greatly appreciated.


Bill

Could someone please tell me the main spec differences between the
TekTronix P6106A and P6053B probes? I acquired a 6053B, but can't
find the specs anywhere. Want to use with a 475 scope. From what
little I have found, the 6106A appears to go a little higher in
frequency than the 6053B.

According to my '88 Tek catalogue, the "recommended" probe for the 475 is
the P6106A, but the P6053B is a "useable combination" with the 475.

Detailed specs depend on cable length, but picking a 6' for comparison we
see:

P6053B
======
10M, 12.5pF. 200MHz at -3dB, 500V DC max. 15-24pF 'scope loading.

P6106A
======
10M, 11.2pF. 250MHz at -3dB, 500V DC max. 15-35pF 'scope loading.

So all in all, very similar. In 1988, the P6053B cost $150 and the P6106A
cost $140.

So not a lot to choose between the two, really.

Craig

The 6106A is a somewhat newer design, and yes, it is good to 250Mhz
with a fast enough scope (with input of 1MOhm and 15-35pf), while the
6053 is good to 200Mhz with a fast enough scope (with input of 1MOhm
and 15-24pf). The input capacitance range is similar enough though,
that you 6053 should work just fine with your 475 under most
conditions. It just won't deliver proper response past 200Mhz.
.... John Hurst
_________________

Could someone please tell me the main spec differences between the
TekTronix P6106A and P6053B probes? I acquired a 6053B, but can't
find the specs anywhere. Want to use with a 475 scope. From what
little I have found, the 6106A appears to go a little higher in
frequency than the 6053B.

Dick

Hi,
Could use a little help with this one, The problem is that the
display takes a long time to appear then slowly expands and contracts
with some stable periods in both positions, this coincides with the
HV test (R1274) voltage varying. the low voltage supplies are stable,
so I suspect the thickfilm net work (307-0359-00), but cannot find
one to try, has anyone tried discrete resistors to replace this?, or
have any ideas on the fault?. Has anyone got this part for sale?
Thanks,
John.

Hi Walter,
Like the other note here, I sympathize with you. Have you looked at
the site: http://www.elbol.com/hamtafiler.htm ?
The site is in German, and it looks to me like the software is demo
software, but they mention WSTR31 and WSTRO. Might be worth a try.
.... John Hurst
_______________

Hi Craig,
I found this site, see if it's what you're after. I don't know
anything more about it.
<http://www.lockinc.com.tw/english/download/betasoftwared.asp>
Don Black.

Craig Sawyers wrote:

This is great, the current verison of wavestar DOES NOT support my
scope, only older versions do (which they will NOT sell me), with
names like WSTR31 and WSTRO, etc. The all new software only works
with new scopes (support was dropped deliberately for older models,
another hose the customer sales thing), and my Tek rep advised me to
ditch this 12 year old out-of-support (and presumably worthless)
item, and buy a new T series digital scope. I almost threw my
keyboard across the room....

Oh boy. I can't help you with the software, Walter - but you have my
sympathies. I would bet that Tek's attitude would have been different if
you were dealing with them in the '60s (but you wouldn't have had a software
problem back then ;-) ).

Good luck in ferreting out the software.

Craig

After a complete day wasted getting the wrong info from Tek,
and eventually no help whatsoever, I could use some assistance from
the group.

I have a working and lovely Tek 2221A digital/analog 100Mhz scope I
just got, and want to use the serial port to download data, a
function they intended, and which is described in depth in the
manual. the original PC software the manual describes, something
mysterious called S41SAVE is now lost in history, and was replaced by
the all-singing-all-dancing Wavestar. After contacting Tek, I was
told to buy this program, assured it would work with my scope.
However, I read all the notes and pdf's on line, since there was no
demo to test, and found, in fact, NO, it would not work, and I re-
contacted my rep with this data, who then suddenly (and
authoritatively) advised, no of course it would not work, my scope is
out of support. Quite a course correction in just a few hours.

This is great, the current verison of wavestar DOES NOT support my
scope, only older versions do (which they will NOT sell me), with
names like WSTR31 and WSTRO, etc. The all new software only works
with new scopes (support was dropped deliberately for older models,
another hose the customer sales thing), and my Tek rep advised me to
ditch this 12 year old out-of-support (and presumably worthless)
item, and buy a new T series digital scope. I almost threw my
keyboard across the room....

Wow, what a wonderful series of answers. Does anybody have
the "obsolete" and worthless unsupported software so I can get some
work done? Happy to pay, just want something that works.

Still fuming,
walter
http://www.sphere.bc.ca

Hello friends,
I have had some difficulty with the 453. The channel 1 position all of a
sudden went way off the display. I could not get it back on the display.
Tapping the mode switch seemed to affect the position greatly. After much
tapping and adjusting of the position control the trace was back where it
should be. I feel that a vibration of the mode switch will send the trace off
again. Any ideas? I looked at the mode switch very carefully and all looks
fine. This is a very clean 453. No dust and the switch looks very clean. The
contact for channel 1 looked like it was making good connection when
switched. Thank you.

Collin

Hi ppl i'm new to the group and was wondering if someone could give me an
idea on my tek 475 scope.I just bought it and channel 2 is great,but channel
1 when you first turn it on keeps going upward,turning the position control
will bring it down for a minute but it keeps on climbing.Eventually it goes
right off the screen.Any ideas would be greatly appreciated.

Bill

Hi all,

Looks like my 'D' type plug in is busted too :(

Or I need to RTFM. Will look at the connections suggested by David Wise
first. Then go through it logically until the fault is traced. (He said
confidently). The manual for the thing is rather interesting as it has a
price list and catalogue for all the Tek stuff made at the time appended
to it. Tubes were all $75 to $100.

Oh, and my scope is the 535 'A' version also. Looking at these manuals,
David is quite right. There are tons of minor modifications that relate
to specific serial numbers.

- Bryce

535A,547,549s,575/175 D,1A1,1A4,CA,M,Q(!) and TU2 Q untested, D Busted.
Mostly use the 549

I am looking for a source for the subject transistors (made by TRW),
P/N 151-0163. Does anyone know of a source for these power
transistors or if there exists any equivalents?
Thanks,
Tom

"2. there's a trace-I get about a 5mm wide vertical band from
horizontal centerline up, and it sweeps left to right. Not what I was
hoping for, but still encouraging. Running a cable from the
CAL OUT to
either of the inputs in the Type D differential amplifier doesn't seem
to affect it. To me that seems like a preamplifier problem?
Am I right
or wrong? Any opinions on how to fix it?"

The Type D is fairly low frequency. Its bandwidth depends on
the gain, and tops out around (memory fails me here) 1MHz.
The upper left knob is a X1/X10/X100/X1000 attenuator, and the
right-center knob is gain (X2/X5/X10/X20/X50/X100). The lower
left knob or knobs are DC balance, and the adjustment is picky.
The D contains a rubber-isolated subchassis, and the flexible wires
that connect it to the main chassis are very prone to breakage.
If (no, when!) they break, there's no telling what the preamp's
output will do. The connection to the main vertical amp is
differential, 100mV/div, on top of a common-mode voltage of 65-70V.
Check the common-mode voltage with a VTVM, then short the diff
inputs together. If this gives you a flat trace it's the preamp,
otherwise look to the main amp.

Check the power supplies (esp for ripple etc.) Voltages should all be
as per manual. The trace on these things is still as sharp as a pin
point (nearly) even after 40 years. Possibly you are getting
hum on the
unconnected differential input.

If the filter caps are weak, the electronic regulators will
drop out on the negative peaks causing all kinds of perturbations,
including interactions between vertical and horizontal.

"3. I bought a 535/545 manual only to realize it's not the right one
for the 535A. Anybody interested?"

I wonder whether there are any really significant differences. Isn't
the A just a "higher frequency response" version of the non-A ?

The two instruments are very similar, and either manual is
fine as a general architecture reference, but there are
detail differences scattered throughout, and you'll come
to grief if you attempt to debug or calibrate with the
wrong manual. In fact, look for a manual at or above your
instrument's serial number. Tek made continuous design
changes, some drastic, throughout production.

Regards,
Dave Wise
535
535A
545
547
CA, D, G, H, L, Z, 1A1, 1A4
All get used.

Hello All,

I am looking to buy a 'P6046 Calibration Shield', P/N 067-0563-00, or a
spare top cover of the probe, P/N 204-0303-09. The probe manual, Fig. 2
(probe mechanical assembly), has it wrong; drawing shows probe upside down
and guy who wrote Parts List looked at probe right side up. Anyways, the
part that I am looking for has 4 holes covered with plastic plugs.

Please, let me know what is price, or if someone does not want to part with
Calibration Shield, a loan is acceptable, too. A spare top cover is not
recoverable for my purposes, I intend to drill additional six holes to make
it into Calibration Shield.

Regards

Miroslav Pokorni