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Repairability of SD-24, SD-30 & SD-32 sampling heads

 

Has anyone attempted to repair one? If so, what was the outcome? I'm familiar with the EPROM failure repair. I'm really asking about the input and output sections as they are ESD sensitive.

Are suitable parts available? I realize that there are no schematics or other information.

Have Fun!
Reg
Bob Koller
 

These are thin film hybrid microcircuit assemblies. Easy enough to repair IF you have a well equipped hybrid lab and access to the right chips. Figuring out the correct parts, and then finding the die, could be a major problem, as hybrids are bit of thing of the past.
I was a hybrid microcircuit manufacturing engineer in a past life.
 

I rather feared that was the case. So "For parts" units are a significant gamble. I was very lucky that the two SD-22s I got for $150 delivered both turned out to be good. That seller mostly dealt in electrical power parts, boxes, breakers, etc.

And one never knows if the claim "untested" is true or not. It's very easy for someone to have two eBay accounts. One selling tested kit and the other selling "untested" which are actually known to be unrepairable and for which they have a "no returns" policy.

I have verified that the NVRAM does *not* store the last instrument settings and it does not store the RTC values. But what they store is still a mystery.

I'll summarize my adventures once I replace the NVRAM.

--------------------------------------------

On Mon, 3/25/19, Bob Koller via Groups.Io <testtech@...> wrote:

Subject: Re: [TekScopes] Repairability of SD-24, SD-30 & SD-32 sampling heads
To: [email protected]
Date: Monday, March 25, 2019, 10:07 AM

These are thin film hybrid
microcircuit assemblies. Easy enough to repair IF you have a
well equipped hybrid lab and access to the right chips.
Figuring out the correct parts, and then finding the die,
could be a major problem, as hybrids are bit of thing of the
past.
I was a hybrid microcircuit
manufacturing engineer in a past life.
Craig Sawyers
 

hybrids are bit of thing of the past.
I was a hybrid microcircuit manufacturing engineer in a past life.
Not in the space industry. Hermetically sealed thin film hybrids are still the only way frequently.
Not cheap for space qualified parts though ;-)

Craig
Bob Koller
 

How well I know. My last job in the hybrid business was at Teledyne Microelectronics. Space Qual parts had reams of paperwork, x-rays, PIND test,photographs, etc...
Tek, Keysight, and many other still , out of necessity, use hybrid technology with custom parts, in the front ends, and other places, of very high frequency instruments. But, commercial hybrid production has, I think, largely been supplanted by ASIC, FPGA, and more modern, more reliable, less expensive technology.
 



This guy seem to have made a home hybrid lab and repairs. Could former
professionals comment ?

Best
Jose


On Mon, Mar 25, 2019 at 9:30 PM Bob Koller via Groups.Io <testtech=
[email protected]> wrote:

How well I know. My last job in the hybrid business was at Teledyne
Microelectronics. Space Qual parts had reams of paperwork, x-rays, PIND
test,photographs, etc...
Tek, Keysight, and many other still , out of necessity, use hybrid
technology with custom parts, in the front ends, and other places, of very
high frequency instruments. But, commercial hybrid production has, I think,
largely been supplanted by ASIC, FPGA, and more modern, more reliable, less
expensive technology.
Bob Koller
 

Yes, Luis has done great work! He is in South America I think. Ascertaining and sourcing the correct parts can be difficult.
Craig Sawyers
 

He clearly knows what he is doing. You don't knock up something with an Altera FPGA unless you have a
major development lab at your disposal

Craig

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Jose Luu
Sent: 25 March 2019 23:29
To: [email protected]
Subject: Re: [TekScopes] Repairability of SD-24, SD-30 & SD-32 sampling heads



This guy seem to have made a home hybrid lab and repairs. Could former professionals comment ?

Best
Jose


On Mon, Mar 25, 2019 at 9:30 PM Bob Koller via Groups.Io <testtech= [email protected]> wrote:

How well I know. My last job in the hybrid business was at Teledyne
Microelectronics. Space Qual parts had reams of paperwork, x-rays,
PIND test,photographs, etc...
Tek, Keysight, and many other still , out of necessity, use hybrid
technology with custom parts, in the front ends, and other places, of
very high frequency instruments. But, commercial hybrid production
has, I think, largely been supplanted by ASIC, FPGA, and more modern,
more reliable, less expensive technology.
 

Far as I know he still works at a university in Portugal -he's been there for some years and is well known in scientific and amateur (especially EME) circles.
73
Dave, ZL3FJ

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Bob Koller via Groups.Io
Sent: Tuesday, March 26, 2019 13:05
To: [email protected]
Subject: Re: [TekScopes] Repairability of SD-24, SD-30 & SD-32 sampling heads

Yes, Luis has done great work! He is in South America I think. Ascertaining and sourcing the correct parts can be difficult.
 

Hi Reginald,

It is in the archives:

/g/TekScopes/topic/7659008#141241

Enjoy.

Egge Siert
 

Hmmm...? Did he die-bond, wire-bond, and package the FPGA or just solder it onto the board?? Not so impressive if it's the latter.? Still, the link to the website shows microwave devices being bonded in hybrid packages to repair mixers in spectrum analyzers - now that's impressive!Jim FordSent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Craig Sawyers <c.sawyers@...> Date: 3/25/19 5:07 PM (GMT-08:00) To: [email protected] Subject: Re: [TekScopes] Repairability of SD-24, SD-30 & SD-32 sampling heads He clearly knows what he is doing. You don't knock up something with an Altera FPGA unless you have a major development lab at your disposal > -----Original Message-----> From: [email protected] [mailto:[email protected]] On Behalf Of Jose Luu> Sent: 25 March 2019 23:29> To: [email protected]> Subject: Re: [TekScopes] Repairability of SD-24, SD-30 & SD-32 sampling heads>> >> This guy seem to have made a home hybrid lab and repairs. Could former professionals comment ?>> Best> Jose>>> On Mon, Mar 25, 2019 at 9:30 PM Bob Koller via Groups.Io <testtech= [email protected]> wrote:>> > How well I know. My last job in the hybrid business was at Teledyne> > Microelectronics. Space Qual parts had reams of paperwork, x-rays,> > PIND test,photographs, etc...> > Tek, Keysight, and many other still , out of necessity, use hybrid> > technology with custom parts, in the front ends, and other places, of> > very high frequency instruments. But, commercial hybrid production> > has, I think, largely been supplanted by ASIC, FPGA, and more modern,> > more reliable, less expensive technology.> >> >> >> >>>

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