Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Pete Lancashire]

Actually the CRT was built for Tek. but since is was a custom it can
be though of as a Tek CRT. I'm not sure about the monitory assembly,
sometime this year I maybe able to get the full specs on the CRT if
anyone is interested.

-pete Ex Tekkie

On Thu, May 19, 2016 at 11:18 PM, Eric Smith  wrote:
> On May 8, 2016 9:33 PM, "Eric Smith"  wrote
> about the CRT of the color monitor of some models of the Tektronix
> DAS 9100 logic analyzer:
>> It is custom, and it is tri-color (red, green, yellow), but it's a
>> beam penetration CRT that is not a modified version of any normal
>> color CRT. There is no shadow mask, and it can only draw one color per
>> field, like the 1951 CBS field-sequential color television, though
>> that was done with a color wheel while this is done by modulating the
>> anode voltage (and possibly the deflection drive as well).
>
> On Mon, May 9, 2016 at 7:45 AM, Pete Lancashire  
> wrote:
>> I must be thinking of a different  model.
>
> Now that I've looked at volume 1 of the DAS 9100 service manual, I
> believe my information was incorrect. Volume 1 is scant on details of
> the color monitor, but it does say that the anode voltage is 21kV. If
> it was a beam-penetration CRT, it would have to be switched between
> different voltages for red and green.  (And yellow, if that was
> generated with its own phosphor layer rather than as two passes with
> red and green.)
>
> The color monitor is manufactured by Tektronix using a CRT also
> manufactured by Tektronix. The monochrome version uses a monitor OEM'd
> from Motorola.
>

Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Eric Smith]

On May 8, 2016 9:33 PM, "Eric Smith"  wrote
about the CRT of the color monitor of some models of the Tektronix
DAS 9100 logic analyzer:
> It is custom, and it is tri-color (red, green, yellow), but it's a
> beam penetration CRT that is not a modified version of any normal
> color CRT. There is no shadow mask, and it can only draw one color per
> field, like the 1951 CBS field-sequential color television, though
> that was done with a color wheel while this is done by modulating the
> anode voltage (and possibly the deflection drive as well).

On Mon, May 9, 2016 at 7:45 AM, Pete Lancashire  wrote:
> I must be thinking of a different  model.

Now that I've looked at volume 1 of the DAS 9100 service manual, I
believe my information was incorrect. Volume 1 is scant on details of
the color monitor, but it does say that the anode voltage is 21kV. If
it was a beam-penetration CRT, it would have to be switched between
different voltages for red and green.  (And yellow, if that was
generated with its own phosphor layer rather than as two passes with
red and green.)

The color monitor is manufactured by Tektronix using a CRT also
manufactured by Tektronix. The monochrome version uses a monitor OEM'd
from Motorola.

Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Pete Lancashire]

I must be thinking of a different  model.
On May 8, 2016 9:33 PM, "Eric Smith"  wrote:

> On Sun, May 8, 2016 at 9:57 AM, Pete Lancashire 
> wrote:
> > I thought the Tektronix DAS used a custom tri-color crt, where the
> > blue phosphor was replaced with yellow.
>
> It is custom, and it is tri-color (red, green, yellow), but it's a
> beam penetration CRT that is not a modified version of any normal
> color CRT. There is no shadow mask, and it can only draw one color per
> field, like the 1951 CBS field-sequential color television, though
> that was done with a color wheel while this is done by modulating the
> anode voltage (and possibly the deflection drive as well).
>
>

Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Eric Smith]

On Sun, May 8, 2016 at 9:57 AM, Pete Lancashire  wrote:
> I thought the Tektronix DAS used a custom tri-color crt, where the
> blue phosphor was replaced with yellow.

It is custom, and it is tri-color (red, green, yellow), but it's a
beam penetration CRT that is not a modified version of any normal
color CRT. There is no shadow mask, and it can only draw one color per
field, like the 1951 CBS field-sequential color television, though
that was done with a color wheel while this is done by modulating the
anode voltage (and possibly the deflection drive as well).

Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Pete Lancashire]

I thought the Tektronix DAS used a custom tri-color crt, where the
blue phosphor was replaced with yellow.



On Sat, May 7, 2016 at 10:24 PM, Eric Smith  wrote:
> I got out my Tektronix DAS 9129 logic analyzer mainframe, which uses a
> red/green/yellow beam penetration CRT.  It uses raster scan, whereas
> my other device with a beam penetration CRT, the HP 1338A (also
> red/green/yellow) is a vector (X-Y) display.
>
> I'm pleased to find that the 9129 passes self-test and the display
> works. Unfortunately I do not have any logic analyzer acquisition or
> pattern generator modules for it, so other than admiring the pretty
> display, it's only useful as a boat anchor.
>

Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Paxton Hoag]

>
>
>
> I'm pleased to find that the 9129 passes self-test and the display
> works. Unfortunately I do not have any logic analyzer acquisition or
> pattern generator modules for it, so other than admiring the pretty
> display, it's only useful as a boat anchor.
>


Surplus Gizmos in Hillsboro Oregon recently had a bunch of Tek 9100
mainframes and parts recently. Last time I visited, a couple of weeks ago,
they had a bunch of Tek 500 and 5000 frames and 2 shelfs of plugins.

http://www.surplusgizmos.com/

No affiliation other than a very happy customer of theirs.
Paxton

-- 
Paxton Hoag
Astoria, OR
USA

Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Eric Smith]

On May 8, 2016 10:45 AM, "Jon Elson"  wrote:
> There is a LOT of Tek logic analyzer gear on eBay.  Some of it goes
fairly cheap, the older it is the cheaper.
> You can likely find the right acq modules within a month.  The 91xx is
REALLY old, too, so should cost more to ship the modules than the price for
the units themselves.

The Tektronix DAS 9100 logic analyzer isn't old! Now my HP 5000A logic
analyzer, THAT is old!
:-)

Re: Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Jon Elson]

On 05/08/2016 12:24 AM, Eric Smith wrote:

I got out my Tektronix DAS 9129 logic analyzer mainframe, which uses a
red/green/yellow beam penetration CRT.  It uses raster scan, whereas
my other device with a beam penetration CRT, the HP 1338A (also
red/green/yellow) is a vector (X-Y) display.

I'm pleased to find that the 9129 passes self-test and the display
works. Unfortunately I do not have any logic analyzer acquisition or
pattern generator modules for it, so other than admiring the pretty
display, it's only useful as a boat anchor.

There is a LOT of Tek logic analyzer gear on eBay.  Some of 
it goes fairly cheap, the older it is the cheaper.
You can likely find the right acq modules within a month.  
The 91xx is REALLY old, too, so should cost more to ship the 
modules than the price for the units themselves.


Jon

Beam-penetration color CRT, Tektronix DAS 912x (was Re: Nice LAB11 brochure.)

[Eric Smith]

I got out my Tektronix DAS 9129 logic analyzer mainframe, which uses a
red/green/yellow beam penetration CRT.  It uses raster scan, whereas
my other device with a beam penetration CRT, the HP 1338A (also
red/green/yellow) is a vector (X-Y) display.

I'm pleased to find that the 9129 passes self-test and the display
works. Unfortunately I do not have any logic analyzer acquisition or
pattern generator modules for it, so other than admiring the pretty
display, it's only useful as a boat anchor.