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Antenna Noise Bridge
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Poor reports ? Antenna Fault ? Traps off-tune ? Storm Damage
? Check FAST with an ANTENNA NOISE BRIDGE. Measure RESONANCE 1-160 MHz
and RADIATION RESISTANCE 2-1000 ohms (50 ohms mid-scale) without transmitting,
no 10 second limit, measure inside and outside the amateur bands, find
where it is 50 ohms, get accurate answers directly, no confusion with harmonics,
no frequency pulling, also adjust your ATU, measure phasing lines, RF resistance
and hence Q of loading coils, preamplifier matching or use it as a noise
generator, transceiver protected, needs 9V dc or internal battery, 4x7x13
cm, 250 g.
"delightful little unit ... most useful", Radio Communication.
"you have saved me hours", LC in Tonbridge.
"worked first time and accurately", FJ in Hayes.
"shown up a fault I never suspected", PJF in Washington, Co.
Durham.
"very good value ... essential tool", Practical Wireless.
"still using after 15 years", AK, Japan.
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Two Tone
Oscillator
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HOW's your LINEAR ? Check for linearity, bias, flat topping
and carrier balance, two (or single) 100 mV audio tones, diagnostic oscillograms,
needs 9 V at 5 mA or internal battery, 4 x 7 x 13 cm, 200 g.
"very pleased", BM in Limerick, Eire.
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Speech Compressor
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MAKE them HEAR YOU with this Speech Compressor between your microphone and transmitter,
BOOST your POWER up to 4 times, FIGHT THROUGH the QRM, 60 dB agc, bypassed when off,
SOUND BIG, needs 12 V at 10 mA, 4 x 7 x 13 cm, 200 g.
"2 "S" points increase, signal still clean", JVM in Lancaster.
"regularly use, excellent results", AJR in Bristol.
"went together no trouble", JS in London.
"makes quite a difference to the signal reports", MS in Plymouth.
"very pleased with results", EWT in Caerphilly.
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