tek 2430 oscope

[Pete]

I have a tek 2430 with a non- op trigger. It appears the main micro
processors address lines cross talking. No regular supplier has any.
The distributor search folks want two arms and three legs for one.
Anyone got any ideas?
Thanx
Pete

 

[Dave]

I have a tek 2430 with a non- op trigger. It appears the main micro
processors address lines cross talking. No regular supplier has any.
The distributor search folks want two arms and three legs for one.
Anyone got any ideas?
Thanx
Pete

Pete:

You can keep a lookout on eBay for an identical scope, which you will likely
pay $200 for to get it to your house and then keep the busted one for parts.

You can chuck it and buy a different scope on eBay for about the same price.

You can bite the bullet and spend $70 or $80 for a new micro, and hope some
other proprietary IC doesn't fail before your VISA bill is paid off.

Older used stuff has drawbacks, and one of the main ones with equipment of
this type is the non-availability of <reasonably priced> spare parts. C'est
la vie.

But then you already knew all that.

Life just sucks sometimes.

Dave S.

 

[Jim Yanik]

.

Pete:

You can keep a lookout on eBay for an identical scope, which you will
likely pay $200 for to get it to your house and then keep the busted
one for parts.

You can chuck it and buy a different scope on eBay for about the same
price.

You can bite the bullet and spend $70 or $80 for a new micro, and hope
some other proprietary IC doesn't fail before your VISA bill is paid
off.

Older used stuff has drawbacks, and one of the main ones with
equipment of this type is the non-availability of <reasonably priced>
spare parts. C'est la vie.

But then you already knew all that.

Life just sucks sometimes.

Dave S.

Yes,they are TEK-made ICs and long out of production,stock
depleted,obsolete,not available from TEK.

the entire 2400 series tanked really fast once TEK sold off their
Hybrid/ICO manufacturing unit,a really BONEHEAD move by the TEK
beancounters.(and I bet TEK never fired those IDIOTS,as they should have.)
You have no idea how that screwed over a lot of TEK employees.
(my vote for 2nd big TEK MGMT goof would be "OpenUpTime".)

Have you tried Sphere in Canada?

 

[N Cook]

Yes,they are TEK-made ICs and long out of production,stock
depleted,obsolete,not available from TEK.

the entire 2400 series tanked really fast once TEK sold off their
Hybrid/ICO manufacturing unit,a really BONEHEAD move by the TEK
beancounters.(and I bet TEK never fired those IDIOTS,as they should have.)
You have no idea how that screwed over a lot of TEK employees.
(my vote for 2nd big TEK MGMT goof would be "OpenUpTime".)

Have you tried Sphere in Canada?

--
Jim Yanik
jyanik
at
kua.net

Has anyone produced a site for "work around" fudges for Tektronix specials.?
There must be loads of people faced with throwing out say a 250MHz Tek
scope, would consider repairing to continued use to 150MHz or lacking some
of the trigger options, etc based around an off-the-shelf video amp/ECL
package, non ideal SMPS transformer etc

 

[Jim Yanik]

Has anyone produced a site for "work around" fudges for Tektronix
specials.? There must be loads of people faced with throwing out say a
250MHz Tek scope, would consider repairing to continued use to 150MHz
or lacking some of the trigger options, etc based around an
off-the-shelf video amp/ECL package, non ideal SMPS transformer etc

I just communicated with a guy who's going to rewind some arcing 485 HV
transformers. Another guy built his own replacement HV multiplier,IIRC,for
a 2200 scope. I'm sure people have built their own thick-film HV divider
replacements,too.
Also,a guy who claimed to have created a discrete replacement module for
the infamous 2445/65 series horizontal output amp IC contacted me about
evaluating it for him.
(I don't have the gear necessary for any eval.,nor a test-bed 2400 scope)

Other than that,I have not heard of any kludges to replace TEK-made ICs or
other parts.

I'm sure that with today's SMD components,some "hybrids" could be made to
replace some TEK-made ICs,and get reasonable preformance,too.
Some of the TEK manuals used to have simplified circuit diagrams for TEK-
made ICs.

the 2445/65 hybrids would be tough,as they were laser-trimmed to spec on
the manufacturing line.

 

[James Sweet]

I'm sure that with today's SMD components,some "hybrids" could be made to
replace some TEK-made ICs,and get reasonable preformance,too.
Some of the TEK manuals used to have simplified circuit diagrams for TEK-
made ICs.

the 2445/65 hybrids would be tough,as they were laser-trimmed to spec on
the manufacturing line.

Probably nothing that couldn't be accomplished by adding a pot or carefully
matching components. The hard part would be getting enough info on what the
original part did. Microcontrollers would be a much greater challenge I
would think than any of the analog stuff.

 

[Michael A. Terrell]

Probably nothing that couldn't be accomplished by adding a pot or carefully
matching components. The hard part would be getting enough info on what the
original part did. Microcontrollers would be a much greater challenge I
would think than any of the analog stuff.

Someone was talking about designing a replacement. I think that was
on a while back.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Jim Yanik]

Probably nothing that couldn't be accomplished by adding a pot or
carefully matching components. The hard part would be getting enough
info on what the original part did. Microcontrollers would be a much
greater challenge I would think than any of the analog stuff.

yes,you would never get the source firmware.
But TEK generally used COTS ICs for that,and programmed them in
manufacturing.

all the 2400 hybrids had digital logic on them to control modes and
gains,along with fast analog chips.

 

[James Sweet]

all the 2400 hybrids had digital logic on them to control modes and
gains,along with fast analog chips.

Was there any code though, or was it just logic? If the latter, discrete
parts, or a small FPGA could handle the logic.

 

[Jim Yanik]

Was there any code though, or was it just logic? If the latter, discrete
parts, or a small FPGA could handle the logic.

there was no processing on the hybrid ICs,just latches to hold the control
bytes from the microprocessor board.
there was a clock input and the serial or parallel data input,depending
on the particular IC. data was muxed to several hybrid ICs from the same
bus.
Actually,inside,the hybrids were a ceramic substrate with thick-film
resistors,SMD caps,and two or more wire-bonded IC dies.
it was bonded to a finned heatsink/cap.