Re: 434 oscilloscope.

From: Jim Yanik (jyanik_at_abuse.gov)
Date: 06/23/04 

Date: Wed, 23 Jun 2004 20:55:16 +0000 (UTC)

"BaggySac" <BaggySac@hotmail.com> wrote in
news:kugCc.29578$MU4.771983@news20.bellglobal.com:

> oh well - I can always run it until it drops! I use it infrequently
> anyways and mostly for audio... When it goes I'll come back here for
> sage advice on an affordable alternative.
>
>
>
> "Jim Yanik" <jyanik@abuse.gov> wrote in message
> news:Xns95115E081AF09jyanikkuanet@204.117.192.21...
>> "BaggySac" <BaggySac@hotmail.com> wrote in
>> news:6F5Cc.26965$Nz.1125787@news20.bellglobal.com:
>>
>> > yes - I know it is an old beast, but it works flawlessly, so if I
>> > can get it to do the job for me, why not? I suspect newer ones are
>> > a few beer and cheesies worth...
>> >
>> > thx.
>> >
>> > "Jim Yanik" <jyanik@abuse.gov> wrote in message
>> > news:Xns9510C3ECA5D8Djyanikkuanet@204.117.192.21...
>> >> "BaggySac" <BaggySac@hotmail.com> wrote in
>> >> news:HE1Cc.23611$Nz.1018304@news20.bellglobal.com:
>> >>
>> >> > I have this old tektronics scope. I did find a primer for scopes
>> >> > on tektronic web site, but I cannot ind specs on the scope -
>> >> > like bandwidth.
>> >> >
>> >> >
>> >> >
>> >>
>> >> 434 has 25 Mhz analog non-storage BW.
>> >> Stored writing rate depends on a few variables.
>> >>
>> >> FYI,These scopes have been out of production for a LONG time.
>> >> You can get an approximate date of manufacture by checking date
>> >> codes on various parts
>> >> The format is ww-yy;last 2 digits of month,and year.I'd check the
>> >> CRT date code,then ICs,timing caps,pots.
>> >>
>> >>
>> >> minor nitpick;TektroniX,not -ics
>> >>
>> >> --
>> >> Jim Yanik
>> >> jyanik-at-kua.net
>> >
>> >
>> >
>>
>>
>> WRT age;
>> The stored writing rate depends on the CRT's flood guns,and
> eventually,they
>> wear out.And such old scopes are hard to get parts for repairs.
>> Plastic parts outgass,get brittle and break.
>>
>> The 434 PS was a wierd one,too.The HV assy was one of the weak points
>> on this model.
>>
>> --
>> Jim Yanik
>> jyanik-at-kua.net
>
>
>

Please remember I'm NOT disparaging your scope.
I serviced many of them and they certainly were not the worst scope TEK
ever made. 

-- 
Jim Yanik
jyanik-at-kua.net

Relevant Pages

  • Re: Tektronix 2235 grief
    ... Jim Yanik wrote: ... Bad advice;the 2235 was a good scope. ... Probably after TEK outsourced their plastic parts production. ... Much brighter CRT and sturdier ...
    (sci.electronics.equipment)
  • Re: Tektronix 2235 grief
    ... Jim Yanik wrote: ... is AFAIR a change in the preregulator board. ... I think you're wrong;IIRC,2235 had the pre-reg on the main board from the ... for a 60 to 100 MHz scope you would manufacture with PCB ...
    (sci.electronics.equipment)
  • Re: Tektronix 2235 grief
    ... Jim Yanik wrote: ... Or a fractured SMD cap. ... The x10 and x100 ceramics were useful for me, ... for a 60 to 100 MHz scope you would manufacture with PCB ...
    (sci.electronics.equipment)
  • Re: Olympus service
    ... you wear your glasses you will be more comfortable and the 'scope will ... I think it may be better with my glasses. ... wear them too often and find the eye relief on many optical instruments to ... By the way have you ever come across any Vickers scopes? ...
    (sci.techniques.microscopy)
  • Re: Oscilloscope
    ... Jim Yanik schrieb: ... Even better; a 2235 100Mhz scope. ... But the graticule is still TOO SMALL for any useful work. ... white plastic cam follower crumbled. ...
    (sci.electronics.repair)