"Paul Burridge" wrote in message
...
On Sun, 16 Nov 2003 23:30:40 -0800, "Ed Price"
wrote:

Designing and building a product to provide many years of use, and then
capable of being repaired without access to unique components and/or
exotic
service equipment, is a concept so rare as to be thought a scam.

Can anyone recommend a decent commercial vector network analyser and
spectrum analyser that one can repair oneself if necessary and
hopefully keep them up and running for ever?
--

"I expect history will be kind to me, since I intend to write it."
-
Winston Churchill


For the spectrum analyzer part, the best a hobbyist can usually afford is an
HP-141, with a few plug-ins (IIRC, they offered a total of 6, collect the
whole set!). And you will need the HP manuals (some of which are available
free from the US Army LOGSA site). And you will need some other basic and
decent lab gear (scope, counter, DMM, sig gens) to do the job right.

Sorry, but I can't comment on any Network Analyzers.

Ed
wb6wsn

Ed Price wrote:

"Paul Burridge" wrote in message
...
On Sun, 16 Nov 2003 23:30:40 -0800, "Ed Price"
wrote:

Designing and building a product to provide many years of use, and then
capable of being repaired without access to unique components and/or
exotic
service equipment, is a concept so rare as to be thought a scam.

Can anyone recommend a decent commercial vector network analyser and
spectrum analyser that one can repair oneself if necessary and
hopefully keep them up and running for ever?
--

"I expect history will be kind to me, since I intend to write it."
-
Winston Churchill

For the spectrum analyzer part, the best a hobbyist can usually afford is an
HP-141, with a few plug-ins (IIRC, they offered a total of 6, collect the
whole set!). And you will need the HP manuals (some of which are available
free from the US Army LOGSA site). And you will need some other basic and
decent lab gear (scope, counter, DMM, sig gens) to do the job right.

Sorry, but I can't comment on any Network Analyzers.

This might be a bit off the exact topic but I have a friend who has a HP
141 and the horozontal display scan has shrunk and folded over on top of
itself. Having never worked on test equipment, I could only offer
generic possibilities, (Voltages, deflection transistors, caps?). Is
there are common part failure that can cause this to the best of your
knowlege?

Thanks,
Dave

Dave Hall wrote:
Ed Price wrote:

"Paul Burridge" wrote in message
. ..

On Sun, 16 Nov 2003 23:30:40 -0800, "Ed Price"
wrote:


Designing and building a product to provide many years of use, and then
capable of being repaired without access to unique components and/or

exotic

service equipment, is a concept so rare as to be thought a scam.

Can anyone recommend a decent commercial vector network analyser and
spectrum analyser that one can repair oneself if necessary and
hopefully keep them up and running for ever?
--

"I expect history will be kind to me, since I intend to write it."
-

Winston Churchill

For the spectrum analyzer part, the best a hobbyist can usually afford is an
HP-141, with a few plug-ins (IIRC, they offered a total of 6, collect the
whole set!). And you will need the HP manuals (some of which are available
free from the US Army LOGSA site). And you will need some other basic and
decent lab gear (scope, counter, DMM, sig gens) to do the job right.

Sorry, but I can't comment on any Network Analyzers.


This might be a bit off the exact topic but I have a friend who has a HP
141 and the horozontal display scan has shrunk and folded over on top of
itself. Having never worked on test equipment, I could only offer
generic possibilities, (Voltages, deflection transistors, caps?). Is
there are common part failure that can cause this to the best of your
knowlege?

Thanks,
Dave


Look at the 2W resistors and the output transistors in the output
deflection stages for a start.

Andrew

Andrew Tweddle wrote:

Dave Hall wrote:
Ed Price wrote:

"Paul Burridge" wrote in message
. ..

On Sun, 16 Nov 2003 23:30:40 -0800, "Ed Price"
wrote:


Designing and building a product to provide many years of use, and then
capable of being repaired without access to unique components and/or

exotic

service equipment, is a concept so rare as to be thought a scam.

Can anyone recommend a decent commercial vector network analyser and
spectrum analyser that one can repair oneself if necessary and
hopefully keep them up and running for ever?
--

"I expect history will be kind to me, since I intend to write it."
-

Winston Churchill

For the spectrum analyzer part, the best a hobbyist can usually afford is an
HP-141, with a few plug-ins (IIRC, they offered a total of 6, collect the
whole set!). And you will need the HP manuals (some of which are available
free from the US Army LOGSA site). And you will need some other basic and
decent lab gear (scope, counter, DMM, sig gens) to do the job right.

Sorry, but I can't comment on any Network Analyzers.


This might be a bit off the exact topic but I have a friend who has a HP
141 and the horozontal display scan has shrunk and folded over on top of
itself. Having never worked on test equipment, I could only offer
generic possibilities, (Voltages, deflection transistors, caps?). Is
there are common part failure that can cause this to the best of your
knowlege?

Thanks,
Dave


Look at the 2W resistors and the output transistors in the output
deflection stages for a start.

Andrew


Thank you!

Dave