High Performance Direct Conversion Receivers
High-Performance Direct-Conversion Receivers High dynamic range, low-distortion audio, 1.6:1 SSB filter shape factor the latest $4000 transceiver from Japan?
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A Home-made Ultrasonic Power Line Arc Detector
www.arrl.orgFrom April 2006 QST © ARRL Figure 2 — Ultrasonic dish assembly. Figure 1 — Simplified block diagram of the ultrasonic detector. at full blast, and the ...
US Amateur Radio Technician Privileges
www.arrl.orgTitle: US Amateur Radio Technician Privileges Author: dszlachetka Subject: Tech Band Chart Keywords: Job #580 Tech Band Chart color only UPDATED 10-29-2015.indd
FSD-218 Relief Emergency · Routine Messages …
www.arrl.orgThe QN signals listed above are special ARRL signals for use in amateur cw nets only. They are not for use in casual amateur conversation. Other meanings that may be used in other services do not apply.
Lightning Protection for the Amateur Radio …
www.arrl.org50 July 2002 also be protected. The method of protection will change, how-ever, since the interface is electronic. Once the peak operating interface voltages are determined, it is relatively straightfor-
Field Day - arrl.org
www.arrl.orgField Day Entry Submission Instructions: Please make certain that your required summary sheet is complete with the following fields filled in:
Registration Form - American Radio Relay League
www.arrl.orgAmateur Radio Emergency Service@ ARES@ Registration Form Name: Cal Sign: Mailing Address: City, state, ZIP code: e-mail address(es): Home phone number:
The NorCal Sierra: An 80-15 M CW Transceiver
www.arrl.orgThe NorCal Sierra: An 80-15 M CW Transceiver Most home-built QRP transceivers cover a single band, for good reason: complexity of the circuit and physical layout can
A Simple yet Precise Function Generator for the …
www.arrl.orgQEX – May/June 2013 7 important role in the generator. A DDS chip like this one builds the waveform using discrete voltage samples whose amplitudes
A Quick Trainer and Field Resource Guide for the …
www.arrl.orgPage 2 This manual is intended to serve as a quick trainer and reference for amateurs deployed in the field for emergency services work, primarily through the ARRL Amateur Radio Emergency Service (ARES).
The Ultimate Transmatch
www.arrl.organd The Ultimate Transmatch BY LEWIS G. MCCOY, *WIICP OME amateurs assume that because they use coaxial feed lines they don't need a Trans- match.
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TIP120, TIP121, TIP122 (NPN); TIP125, TIP126, …
www.onsemi.comTIP120, TIP121, TIP122 (NPN); TIP125, TIP126, TIP127 (PNP) www.onsemi.com 3 Figure 1. Darlington Circuit Schematic BASE EMITTER COLLECTOR ≈ 8.0 k ≈ 120
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www.ti.comLM143 Monolithic High Voltage Operational Amplifier Applications INTRODUCTION The LM143 is a general purpose, high voltage operational amplifier featuring ± 40V maximum supply voltage operation, output swing to ± 37V, ± 38V input common-mode range, in- put overvoltage protection up to ± 40V and slew rate greater than 2V/µs *.
TIP140, TIP141, TIP142, TIP145, TIP146, TIP147 ...
www.onsemi.comtip140, tip141, tip142, (npn); tip145, tip146, tip147, (pnp) http://onsemi.com 2 marking diagrams aywwg tip14x tip14x aywwg 1 base 2 collector 3 emitter