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AUDIO Q-MULTIPLIER
https://www.qsl.net/wb5ude/kc6wdk/qmultiplier.html
AUDIO Q-MULTIPLIER Cost estimate: $15 Another wonderful presentation by Larry Lisle, this device greatly increases the ability to separate Morse Code signals by enhancing a particular audio frequency while attenuating the others.
Transistor Audio Q Multiplier - World Radio History
https://worldradiohistory.com/hd2/IDX-Consumer/Archive-Electronics-World-IDX/IDX/60s/1960/Electronics-World-1960-05-OCR-Page-0124.pdf
The "Q" multiplier is an audio -volt- age amplifier with controlled positive feedback (see Fig. 1). A portion of the Fig. I. Complete schematic diagram and parts listing for the audio "Q" multiplier. Si OUT r , ,y C6 - + 2VD.C. R, -1000 ohm carbon or wire -wound linear taper pot ...
AUDIO Q-MULTIPLIER
https://pe2bz.philpem.me.uk/Comm/-%20Receivers/-%20Misc/CWr-01-40-80meters-4tran/Audio-Q-Mult/qmultiplier.html
AUDIO Q-MULTIPLIER. Cost estimate: $8. Another wonderful presentation by Larry Lisle, this device greatly increases the ability to separate Morse Code signals by enhancing a particular audio frequency while attenuating the others. How it Works: The audio output signal of a receiver incoming through T1 is enhanced by a 741 op-amp configured as a ...
Q Multiplier — Er… Multiplies Q | Hackaday
https://hackaday.com/2021/01/18/q-multiplier-er-multiplies-q/
The Q multiplier was a regenerative amplifier that operated at just below the oscillation point. This provided very high amplification for the frequency of interest and less amplification for ...
Q_MULTIPLIER - Audio_Circuit - Circuit Diagram - SeekIC.com
http://www.seekic.com/circuit_diagram/Audio_Circuit/Q_MULTIPLIER.html
Q_MULTIPLIER. Published:2009/7/10 5:43:00 Author:May | From:SeekIC. Circuit Q in single-coil arrangement is insensitive to drift in trctnsistor parameters, permitting use in filter and oscillator design.-J. R. Woodbury, Simple Transistor Q …
Transistorized Q Multiplier - Radio Amateur 11-1969
https://www.radioexperimenter.us/rm-1969-11/info-cwm.html
Q multiplier in notch function uses network in feedback circuit. (C) varies notch frequency approximately ¿6 khz from 455 khz center frequency, the if bandwidth is indicated by the fact that many of the better and more costly receivers which already incorporate optimized if SSB filters also incorporate notch filters, since it is the only means ...
Q-MULTIPLIER by SM0VPO
http://www.sm0vpo.altervista.org/use/qmult.htm
Q-MULTIPLIER. by Harry Lythall - SM0VPO. A few weeks ago I posted to QRP@WW the modifications to convert a cheap radio to the HF amateur bands. I have dug-out one of my radio's that was modified for 7MHz and found yet another circuit was built into it. This is the circuit for a Q-multiplier to reduce the IF bandwidth.
Q Multiplier QF-1 Amateur-D Heathkit Brand, Heath Co ...
https://www.radiomuseum.org/r/heath_q_multiplier_qf_1_qf.html
Model: Q Multiplier QF-1 - Heathkit Brand, Heath Co.; Shape. Tablemodel, with any shape - general. Dimensions (WHD) 7.75 x 4.687 x 4.125 inch / 197 x 119 x 105 mm. Notes. The Heathkit Q-Multiplier QF-1, when used with a communications receiver, provides additional selectivity or signal rejection as desired.
multiplier.audio
https://multiplier.audio/
Developing new sound design and synthesis techniques. New sounds are exciting. New sound pushes the culture forward. We’re not in the business of recreating a currently popular genre or artist. We create sounds that haven’t been heard before. Take a listen.
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