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@yahoo.com

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@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@yahoo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com >