Singer Stoddart 94592-1 rod antenna coupler info
 

Greetings,
I have come by a Singer Stoddart 94592-1 rod antenna coupler. It is a cube
about 4.5" is green and has a telescoping antenna on top affixed by a screw
on BNC type connector. The output is BNC and there are two binding posts
for B+ input I believe. I haven't been able to find a thing on the www
about this device, although, i did see one listed on ebay once for big
bucks. Does anyone have any info on this device they would share with me?
The device is for H.F.
Dave - KA9SRU

Thanks

Singer Stoddart 94592-1 rod antenna coupler info
 

Dave Rude wrote:

Greetings,
I have come by a Singer Stoddart 94592-1 rod antenna coupler. It is a cube
about 4.5" is green and has a telescoping antenna on top affixed by a screw
on BNC type connector. The output is BNC and there are two binding posts
for B+ input I believe. I haven't been able to find a thing on the www
about this device, although, i did see one listed on ebay once for big
bucks. Does anyone have any info on this device they would share with me?
The device is for H.F.
Dave - KA9SRU

Thanks



An EM specialist may shed more light on this subject.

Twenty years ago, when I managed an EM lab among other responsibilities,
Singer Stoddart was the #1 supplier of laboratory quality EM measuring
devices. They designed and sold EM test instruments including receivers,
antennas, couplers, that were traceable to NBS primary standards.

I suspect you have a very expensive coupler for a receiving dipole for
measuring radiated EM noise fields.

[For about $40,000 you may find a Singer Stoddart receiver and antenna
set to use with it g].

Any professional EMers out there??

Singer Stoddart 94592-1 rod antenna coupler info
 

Dave wrote:

Dave Rude wrote:

Greetings,
I have come by a Singer Stoddart 94592-1 rod antenna coupler. It is a
cube about 4.5" is green and has a telescoping antenna on top affixed
by a screw on BNC type connector. The output is BNC and there are two
binding posts for B+ input I believe. I haven't been able to find a
thing on the www about this device, although, i did see one listed on
ebay once for big bucks. Does anyone have any info on this device
they would share with me? The device is for H.F.
Dave - KA9SRU

Thanks


An EM specialist may shed more light on this subject.

Twenty years ago, when I managed an EM lab among other responsibilities,
Singer Stoddart was the #1 supplier of laboratory quality EM measuring
devices. They designed and sold EM test instruments including receivers,
antennas, couplers, that were traceable to NBS primary standards.

I suspect you have a very expensive coupler for a receiving dipole for
measuring radiated EM noise fields.

[For about $40,000 you may find a Singer Stoddart receiver and antenna
set to use with it g].

Any professional EMers out there??



As I read my earlier post, it comes to mind that the matching receiver
was an NM-40A ... quite expensive in the mid 80s.

Singer Stoddart 94592-1 rod antenna coupler info
 

"Dave" wrote in message
...
Dave Rude wrote:

Greetings,
I have come by a Singer Stoddart 94592-1 rod antenna coupler. It is a
cube
about 4.5" is green and has a telescoping antenna on top affixed by a
screw
on BNC type connector. The output is BNC and there are two binding
posts
for B+ input I believe. I haven't been able to find a thing on the www
about this device, although, i did see one listed on ebay once for big
bucks. Does anyone have any info on this device they would share with
me?
The device is for H.F.
Dave - KA9SRU

Thanks



An EM specialist may shed more light on this subject.

Twenty years ago, when I managed an EM lab among other responsibilities,
Singer Stoddart was the #1 supplier of laboratory quality EM measuring
devices. They designed and sold EM test instruments including receivers,
antennas, couplers, that were traceable to NBS primary standards.

I suspect you have a very expensive coupler for a receiving dipole for
measuring radiated EM noise fields.

[For about $40,000 you may find a Singer Stoddart receiver and antenna
set to use with it g].

Any professional EMers out there??



Yup. Singer made the NM-25 EMI receiver, too. I don't have any TM's around
any more, but there were about a dozen calibrated antennas that went with
those receivers. When you made a measurement, you referred to a calibration
chart for the "Antenna Factor" at that freq and you used it to convert the
received signal strength to actual field strength at that point. The NM-25
was the heaviest item I ever had to lug. Oof!

Those binding posts have me puzzled, though. I remember only coarse freq
switching on our couplers -- nothing active inside that would take power
input. Anything's possible.