[time-nuts] Re: Texscan Programmable Attenuators

[Michael Fahmie]

Skip,
I was able to locate a spec sheet, see attached.
-Mike-
WA6ZTY

On Thu, Jun 6, 2024 at 3:08 PM skipp isaham via time-nuts <
time-nuts at lists.febo.com> wrote:

>
> Hello Time-Nuts Group,
>
> I received a donated Texscan Programmable Attenuator, Model PA-51 style
> this one with Female N-connectors.  It's a nice looking unit and I'm not
> able to find much in the docs department.  Even a search for Texscan
> doesn't seem to turn up much, they might be out of business these days(?).
>
> I'm hoping someone would at least be able to give me the basic
> information of how to control the attenuation steps.
>
> The attenuator box itself, has a pair of feed-through capacitors per
> each box marked attenuation value, one feed-through has a + the match
> has - .Logic suggests some applied potential/current to a pair of pins
> turns on or off the corresponding attenuation value.
>
> Would someone be able to please describe the expected control values/
> methods for this Texscan Programmable Attenutator.  Through the Group
> here or Email direct, what ever is best. Actually having an original
> data or instruction sheet would be wonderful, but I can and will try to
> work with whatever information I receive.
>
> Used / surplus Texscan products seem to "be around", a number of
> different physical format attenuation products turn up at on line
> auction (Ebay).  In addition to the PA-51 series (aka PA-5x...), a few
> models that look like the JFW rotary equivalents are also listed at
> auction. Might Texscan be or have been a company simply putting their
> label on other mfgrs products?
>
> If I can get my head around how to control this PA-51, I can certainly
> use it for my automated pre-amplifier evaluations. Thank you in advance
> for any replies.
>
> Regards,
>
> Skipp
> skipp025 at yahoo.com
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