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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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11th Dec 2012, 11:18 am | #1 |
Retired Dormant Member
Join Date: Apr 2005
Location: Cambridge.
Posts: 25
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What is a Wavemeter?
I have just bought a wavemeter W1191A - mainly for the Lancaster association. I have no idea what it is or what it was for. I would be grateful for an elementary lesson.
David |
11th Dec 2012, 11:33 am | #2 |
Octode
Join Date: Dec 2010
Location: St Ives, Cambridgeshire, UK.
Posts: 1,180
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Re: What is a Wavemeter?
David,
Info here https://www.vintage-radio.net/forum/...ad.php?t=10704 and lots more with schematics etc http://www.pa3esy.nl/military/gb/air...et.html#schema Andrew
__________________
Invisible airwaves crackle with life. Or they should do. BVWS Member |
11th Dec 2012, 2:06 pm | #3 |
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,007
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Re: What is a Wavemeter?
Basically, it contains two oscilaltors: a crystal-controlled one and a variable one. There is also a mixer and an audio-amplifier.
The crystal-controlled osc generates reference signals that are used to calibrate the scale of the variable-frequency oscillator, by tuning for "zero beat" audio on a pair of headphones. Then having established the accuracy of the variable oscillator against the crystal reference-points you tune it to the frequency you want to operate your TX/RX on, then you tune the RX until you hear the oscillator on the RX. For transmitter tuning you switch the TX on, press transmit and listen on the wavemeter headphones - tune the transmitter until you hear the whistle of its signal beating against the wavemeter's calibrated oscillator. G6Tanuki. |
11th Dec 2012, 3:57 pm | #4 |
Retired Dormant Member
Join Date: Apr 2005
Location: Cambridge.
Posts: 25
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Re: What is a Wavemeter?
Perfect - many thanks - I am illuminated
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