Another "It followed me home"....

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majoco

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...from the same local auction site - a Stoddart NM-37/57A Field Intensity Meter - well, it would be if it came with a calibrated antenna but I guess that's still screwed to an aircraft! It's a glorified analogue scanner that covers 30MHz to 1GHz in 8 ranges either by twiddling the tuning knob or letting it scan one range - problem is it doesn't stop on station although a very powerful AFC holds the station for about 5 seconds - I used one of these (might even be this one judging by the stickers on it!) in the 80's as a Flight Navaids Inspector to plot the signal strength of landing or en-route aviation beacons.I'll need to research a plotter programme for a laptop.

Seems to work quite well, I'm listening to a local FM station right now. How much? How does NZ$125 sound! About US$100, I saw somewhere that they were US$17k in 1980!

Oops! I see I've put this in the wrong forum - please feel free to move it, Mr. Moderator! Thanks.
 
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majoco

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Dec 25, 2008
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New Zealand
Playing with my new toy.....

Here I have connected my old faithful 'scope to the sockets on the back - the horizontal deflection is frequency, low left about 85MHz to high right about 110MHz and the vertical is a logarithmic scale about 10dBm per square - so what we are seeing is the FM broadcast band stations in my area. The antenna is a discone up on the roof about 15 feet high.

The second one I have compressed the frequency scale so that the left edge is about 50MHz - the little spur at about 75MHz is the local fire department transmitter. The tiny spur on the left of the FM band is my little FM transmitter on 88.5MHz.
 
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