"Ray Collins" *remove wrote in message
...
Years ago, in another life, I worked in radio. There was a small test
set that measured RF so that the station engineers could tell the
contours still matched the promise of performance. Can't remember what
they were called and who manufactured them. Anybody?

They were in a beige case with a meter on the front and were fairly BIG $.


Field Intensity Meter or a Field Strength Meter or an EMI Receiver.

Beige case (maybe one for meter and one for the power supply?), big $ =
Stoddart NM series meters.
Same, but gray crinkle, bigger (but only one) box, big $ = Empire NF-105
meter.
Really, really big case, microwave, pale green & beige, really big $$,
Polarad FIM meter.

OTOH, hand-held beige, modest $, maybe a Narda power density meter (did it
have a separate hand-held wand?).

Ed
wb6wsn

As my old brain remembers they were regenerative, fair size meter on the
front, well made case with rounded corners, the size of a lunchbox and
stored in a wooden box. I think Potomac Instruments may be the one.
Now there's just finding one. ;-)



Ed Price wrote:
"Ray Collins" *remove wrote in message
...

Years ago, in another life, I worked in radio. There was a small test
set that measured RF so that the station engineers could tell the
contours still matched the promise of performance. Can't remember what
they were called and who manufactured them. Anybody?

They were in a beige case with a meter on the front and were fairly BIG $.



Field Intensity Meter or a Field Strength Meter or an EMI Receiver.

Beige case (maybe one for meter and one for the power supply?), big $ =
Stoddart NM series meters.
Same, but gray crinkle, bigger (but only one) box, big $ = Empire NF-105
meter.
Really, really big case, microwave, pale green & beige, really big $$,
Polarad FIM meter.

OTOH, hand-held beige, modest $, maybe a Narda power density meter (did it
have a separate hand-held wand?).

Ed
wb6wsn

On Fri, 16 Jan 2004 06:42:03 -0800, Ray Collins
*remove wrote:

As my old brain remembers they were regenerative, fair size meter on the
front, well made case with rounded corners, the size of a lunchbox and
stored in a wooden box. I think Potomac Instruments may be the one.
Now there's just finding one. ;-)

The Potomac FIM-41, which covers the broadcast band, is see on Ebay
from time to time. There was another one with broader coverage that
I've never seen for sale anywhere. Those might even be considered
rare. Still a ton of 41s and the older ones still in use by AM
directional stations. I've got two of them sitting right here but I
don' want to open them up. Best I recall they are just standard
portable radio type superhets without AVC.

You have TWO of them but you don't want to open them up?????

Broadcast stations (AM directionals) and consulting engineers would pay
a hefty price for those...WHY are you just sitting on them??????

BTW the models a
FIM 22 which covers down into the LF range 220-550 kHz
FIM 41 which covers AM BC band 500kHz to 5 MHz
FIM 71 VHF range (VHF TV and FM) 4MHz to 225 MHz
FIM 72 UHF range 450-960 MHz

The 22 and 72 are rare and are special order only from Potomac.
The 71 is seen more often than the 41 on Ebay, etc...

Chris
WB5ITT at arrl . net
Houston Telecom
Telecom/Broadcast consulting
Houston, TX

Phil Witt wrote:

On Fri, 16 Jan 2004 06:42:03 -0800, Ray Collins
*remove wrote:


As my old brain remembers they were regenerative, fair size meter on the
front, well made case with rounded corners, the size of a lunchbox and
stored in a wooden box. I think Potomac Instruments may be the one.
Now there's just finding one. ;-)


The Potomac FIM-41, which covers the broadcast band, is see on Ebay
from time to time. There was another one with broader coverage that
I've never seen for sale anywhere. Those might even be considered
rare. Still a ton of 41s and the older ones still in use by AM
directional stations. I've got two of them sitting right here but I
don' want to open them up. Best I recall they are just standard
portable radio type superhets without AVC.

--
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