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Autek research qf-1A ssb cw am audio filter peak notch
https://www.chicago-industrial.com/North-Chicago/New/Industrial/Woodworking/Autek-research-qf-1A-ssb-cw-am-audio-filter-peak-notch.html5
Autek research qf-1A ssb cw am audio filter peak notch. This unit is placed between your receiver and your speaker. Audio is processed to improve selectivity, remove annoying hetrodynes with an adjustable notch filter, and act as an adjustable low pass or high pass filter for all signals. Selectivity is adjustable down to a narrow 20 hz.
Autek Research SSB / CW / AM audio filter, QF-1A ...
https://www.youtube.com/watch?v=2GyAG0WCzQQ
Project complete. I demonstrate its operation.Donations accepted: paypal.me/PayKlondikeMike
Autek QF-1A User Manual - gmcotton.com
http://gmcotton.com/Ham_Radio/MISC%20Manuals/Autek/QF1A%20instructions.pdf
QF-1A AUDIO FILTER Your new audio filter is the product of several years of development by the originator of commercial active audio filters for shortwave communications (1972). Each filter is thoroughly tested twice before shipment. Please read the instructions carefully for best results, and save them for future reference. If
eHam.net
https://www.eham.net/reviews/view-product?id=756
Autek QF-1A a Nice Surprise Time Owned: 6 to 12 months. Months ago I relieved someone of a QF-1A for $7.50 - not being a contester he didn't know what to do with it. Mine comes with the A.C. plug and I much PREFER it that way for portable indoor operations. Splitting the Left/Right Channel audio lines on the FT-1000mp, I route the Sub-RX audio
Autek Research QF-1, Autek Research QF-1A, Autek Research RF-1
https://www.universal-radio.com/used/sold302.html
UI69 Autek Research QF-1A $64.95 SOLD Audio Filter This Autek Research QF-1 audio filter features: Peak, Notch and Low Pass. Input is via a hard wired RCA phono cable off the rear panel. Operates from 120 VAC. [02/14] UR05 Autek Research RF-1 $79.95 SOLD Pocket Analyzer The Autek Research RF-1 is designed to check and adjust antennas,feedlines ...
Autek Research QF-1A - YouTube
https://www.youtube.com/watch?v=xhRkyDYQV1Q
Today i test the audio filter for problems, then go ahead and fix the issues. Also you can hear the results before and after. also sit back and listen to ...
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