WTB Tek 475 voltage multiplier (tripler)
Tek
done the same on my Tek 454A scope, which multiplier was still
discrete...
Cya !
Robert Wiley wrote:
> I need a Tektronics model 475 voltage multiplier.
> Part number 152-0552-00. It's rated at 5KV in 15KV
> out. The manual lists a mfr part no: CMX315. The
> actual part out of my scope was made by Murata and
> shows a part number MSL3576A and what I think is a
> date code of 8607.
>
> I would also be interested in any possible
> substitutions for this item.
>
> BTW: Is there something else that I should look
> for that could have caused this part to go bad or
> is this just one of those things...
>
> Bob Wiley
Robert Wiley
Steven L. Bender
From:
Robert Wiley <engr...@digitalexp.com>
Subject:
WTB Tek 475 voltage multiplier (tripler)
Date:
Thu, 05 Aug 1999 15:39:46 -0500
See Also:
Equipment Electronics Science
I'm looking at a voltage multiplier. Part number 152-0552-00, right now, the
one I will put
in my 475, when I find the time, it has a 7751 date code, that 1986 DC seems
a bit too recent
for a 475, so it might be a replacement. Guess the older one could be
rebuilt... if it
wasn't original, as it seems to lack HP's part number, maybe it wasn't quite
up to the task.
Also check for soot and carbon on and around the orange 5 KV caps, thast can
drain off extra
current, like adding a meg ohm resitor to the 5 KV section, causing extra
loading.
I don't think the original HP part is available anymore. Somewhwre a Color
TV unit might be
available that would sub... maybe inquire of Murata ???
- Steven
Bob Wiley
Steven L. Bender, Designer of Vintage Audio Equipment
AMP REBUILD INFO Page: http://www.gis.net/~slbender
"I think your analysis is basically correct, and the "white paper" is
excessively stained with snake-oil and is of little use for anything other
than starting fires intended to barbecue overzealous marketing departments."
-Dave Platt
-**** Posted from RemarQ, http://www.remarq.com/?c ****-
Search and Read Usenet Discussions in your Browser
Kevin Carney
but they did.
Tek wrote:
>
> You can built it yourself; it is only 3 diodes and 3 capicators. I've
> done the same on my Tek 454A scope, which multiplier was still
> discrete...
>
> Cya !
>
> Robert Wiley wrote:
>
> > I need a Tektronics model 475 voltage multiplier.
> > Part number 152-0552-00. It's rated at 5KV in 15KV
Robert Wiley
component values? I could sit down and figure it out I guess, but why
reinvent the wheel.
Thanks for the help,
Bob Wiley
Tek
full 15 KV), you should use 500pF 10kV one's.
The output of the triples is connected through 2 1Meg resistors to the CRT.
In where these 2 resistors connect, the 15KV cap is connected. If you want,
I can sent you the 454A schematic of this part by e-mail...
Jim Yanik
>
>I need a Tektronics model 475 voltage multiplier.
>Part number 152-0552-00. It's rated at 5KV in 15KV
>out. The manual lists a mfr part no: CMX315. The
>actual part out of my scope was made by Murata and
>shows a part number MSL3576A and what I think is a
>date code of 8607.
>
>I would also be interested in any possible
>substitutions for this item.
>
>BTW: Is there something else that I should look
>for that could have caused this part to go bad or
>is this just one of those things...
>
>Bob Wiley
>
The most likely failure is that one of the internal HV caps broke down.Not
that that will do you any good.It is possible to build your own,but
construction techniques will be challenging.Especially with where TEK stuck the
multiplier in the instrument!
Jim Yanik,NRA member
Jim Yanik
>
>I've got basic schematics for a ladder type tripler. Could you suggest
>component values? I could sit down and figure it out I guess, but why
>reinvent the wheel.
>
>Thanks for the help,
>
>Bob Wiley
>
Diodes and caps similar to what is used for the cathode supply would likely
work.
Jim Yanik,NRA member
>Tek wrote:
>
>> You can built it yourself; it is only 3 diodes and 3 capicators. I've
>> done the same on my Tek 454A scope, which multiplier was still
>> discrete...
>>
>> Cya !
>>
>> Robert Wiley wrote:
>>
thaumat...@softcom.net
wrote:
>I need a Tektronics model 475 voltage multiplier.
>Part number 152-0552-00. It's rated at 5KV in 15KV
>out. The manual lists a mfr part no: CMX315. The
>actual part out of my scope was made by Murata and
>shows a part number MSL3576A and what I think is a
>date code of 8607.
Okay, I've given out this name a lot recently, so I got the number from work.
Up in Oregon by the Tek folks is a guy by the name of Dean Kidd. He buys
warehouses full of out of support parts from Tek and sells them. He also has
specials on Factory refurbed scopes every so often. More importantly, he has
TEK parts at reasonable prices. I've been told he doesn't mind small orders.
You can contact him at:
Dean Kidd
27270 S.W. Ladd Hill Rd.
Sherwood, OR 97140
(503) 685-7363
Best of luck
Doc
thaumaturge at softcom dot net
Andy Cuffe
>
> On Thu, 05 Aug 1999 15:39:46 -0500, Robert Wiley <engr...@digitalexp.com>
> wrote:
>
> >I need a Tektronics model 475 voltage multiplier.
> >Part number 152-0552-00. It's rated at 5KV in 15KV
> >out. The manual lists a mfr part no: CMX315. The
> >actual part out of my scope was made by Murata and
> >shows a part number MSL3576A and what I think is a
> >date code of 8607.
>
The 475 is about the same age and looks identical to the more common
465. If the only difference is the higher bandwidth vertical amp, you
should be able to use the tripler in your scope. It shouldn't be too
hard to find a 465 with a bad CRT, or other serious problems.
--
Andy Cuffe
balt...@psu.edu