need HP 1200 scope manual

[Walter Harley]

Found an old HP 1200B scope on a junk heap. No trace. I think I'll try to
fix it up and give it to the next person who asks me what an oscilloscope
does

Does anyone have a schematic or service manual for this? Or even know what
the specs are?

Thanks!

 

[Walter Harley]

"Walter Harley" <walterh@cafewalterNOSPAM.com> wrote in message
news:1vudnYkv9NSImKvZRVn-jw@speakeasy.net...

Found an old HP 1200B scope on a junk heap. No trace. I think I'll try
to fix it up and give it to the next person who asks me what an
oscilloscope does

Does anyone have a schematic or service manual for this? Or even know
what the specs are?

Following up on my own thread (thanks to someone who responded privately):
500kHz bandwidth, 100uV/division sensitivity.

It's pretty simple inside, and like all HP gear of the era, designed to be
serviced. So it was no problem to find the open resistor in the power
supply, replace it, and I'm up and running! I was able to calibrate the
timebase and vertical gain without a manual, but I'm reluctant to do
anything to the attenuator compensation, etc. - basically, anything
involving a trimmer cap. But it's in pretty good shape even without that.
Probably could use some contact cleaner on the selector switches. Traces
are nice bright blue.

It's an interesting instrument. Both channels have differential input, each
leg separately switchable AC/DC/off. And although bandwidth is only 500kHz,
it will go down to 5 sec/div, and phosphor persistence is long enough to
make that worthwhile. All in all, it should be a useful addition to the
stable. Maybe I won't give it away quite so soon after all

 

[Alan Douglas]

Hi,

Maybe I won't give it away quite so soon after all

I've had a 1200 on my bench for years. It's been 100% reliable
(good thing, since I have no manual). I use it whenever I need the
sensitivity or when I want to remind myself how sharp a good analog
scope trace can be.

Alan
--
NewsGuy.Com 30Gb $9.95 Carry Forward and On Demand Bandwidth

 

[Bret Ludwig]

Alan Douglas wrote:

Hi,

Maybe I won't give it away quite so soon after all

I've had a 1200 on my bench for years. It's been 100% reliable
(good thing, since I have no manual). I use it whenever I need the
sensitivity or when I want to remind myself how sharp a good analog
scope trace can be.

You mean Donny Lancaster could be w... I mean, wr.... I mean NOT
RIGHT when he says HP scopes are worthless and won't trigger for squat?
DON LANCASTER, Wrong??? Say it isn't so!!!

 

[Don Lancaster]

Bret Ludwig wrote:

Alan Douglas wrote:

Hi,


Maybe I won't give it away quite so soon after all

I've had a 1200 on my bench for years. It's been 100% reliable
(good thing, since I have no manual). I use it whenever I need the
sensitivity or when I want to remind myself how sharp a good analog
scope trace can be.

The last decent scope HP ever built was the 130-C.
It has been downhill ever since.

--
Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com

 

[Walter Harley]

"Don Lancaster" <don@tinaja.com> wrote in message
news:49t6lsFqire8U2@individual.net...

The last decent scope HP ever built was the 130-C.
It has been downhill ever since.

So as long as I want to trigger on the negative edge, I should be fine,
right? ;-)