HP 1331A X-Y display blanking

Pete Lancashire pete at petelancashire.com
Sat Apr 29 10:31:36 CDT 2017

I don't but. If there is not a connector on the back, you will need to
route the signal to one.

Find the erase button and look at the voltages. The "erase" signal will
either be grounded
to function or will be raise to a voltage level +5 or +12 for example.

Once you have that, all you need is a 2 wire connector, a 1/8" audio for

There are manuals on Ebay but for something this simple it is your call.

On Sat, Apr 29, 2017 at 8:13 AM, Jules Richardson via cctalk <
cctalk at classiccmp.org> wrote:

> Has anyone got a manual for an HP 1331A X-Y display? It's a storage-tube
> device, and I'm curious to know if there's a way of triggering the erase
> function remotely rather than having to physically prod the erase button on
> the front.
> The rear just has X-Y-Z inputs, and I *think* that X-Y are supposed to be
> in the order of +/- 1V, while Z is the intensity with 0V being full and
> around 1V being off. Maybe throwing a negative voltage at Z erases, or
> something, though.
> cheers
> Jules

More information about the cctech mailing list