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Shrine Temple Amateur Radio Club

G8EPR pye telecoms museum incorporating.. emeregency services & radiotelephone museum of great britain

Constructing a high-performance RF spectrum analyzer up to 1000 MHz requires careful attention to component selection, shielding, and circuit isolation. This resource details a project that improves upon the _Spectrum Analyzer for the Radio Amateur_ design by Wes Hayward (W7ZOI) and Terry White (K7TAU), incorporating ideas from Scotty Sprowls' project, particularly his 1013.3 MHz IF bandpass cavity filter. The analyzer utilizes a Mini-Circuits SRA-11 mixer with a sweeping local oscillator from 1013 to 2013 MHz, feeding into a 4-pole copper pipe cavity filter. The design employs a second SRA-11 mixer with a fixed 1024 MHz LO to produce a 10.7 MHz final IF. This signal then passes through narrowband resolution filters and is processed by Analog Devices AD603 and AD8307 ICs for IF amplification and logarithmic detection, driving an oscilloscope in X/Y mode. The project emphasizes modular construction, using salvaged components and double-sided FR4 material for PCBs, with critical notes on minimizing spurious images through effective shielding and proper voltage regulation for each module. Key components include a Z-Communications V585ME48 VCO for the first LO and a Z-Comm V583ME01 VCO controlled by a Motorola MC145151 PLL for the second LO. An optional Hittite HMC307 step attenuator and K&L 5L121-1000/T5000-O/O low-pass filter manage RF input. Tuning procedures for the 10.7 MHz IF resolution filter are also detailed, showing before-and-after spectrum views.

21,145.7 MHz from JN55VF

This versatile broadband amplifier is used in several DX Lab projects.

The Triangle ATV Association is an organization of hams in the Raleigh-Durham-Chapel Hill NC area who communicate by means of our own personal TV transmitters and receivers.

Licensed since February 1991, IK1QBT Tony Gallo shares insights into his extensive amateur radio journey, highlighting his involvement in **DXpeditioning** and contesting. His page lists several callsigns he has operated under, including 3A/IK1QBT, TK/IK1QBT, IA5/IK1QBT, and as an operator for 4U9ITU and 4U0ITU, showcasing a broad range of international activity. Tony's background as an ex-Radio Officer in the Merchant Navy and a Radio Operator for the Italian Maritime Coast Radio Station "ICB/GenoaRadio" provides a unique perspective on radio communications. He is an active member of ARI, INORC, and HSC, and serves as secretary for the Marconi Club ARI LOANO, underscoring his deep engagement within the amateur radio community. His participation in multi-multi operator contest teams like IH9P in the CQWW-CW 2006 and the HQ Italian ARI Contest Team in the IARU HF (2004-05-06) demonstrates a strong commitment to competitive operating, primarily on **CW** and HF bands.

Poole Radio Society G4PRS, located in Poole, Dorset.

Reviews of the Yaesu FL-2100 series power amplifier at eham

Located near North Bay Ontario (FN06) about 300KM north of Toronto, the CCC is built on the property of VA3RTW (Bob Williams).

provide reliable access to the APRS Internet Service for users around the world

Rewinding solenoid coils and how to article

The standard J-Pole antenna is a end fed 1/2 wavelength antenna, in this article is explained also how to build an expanded Super J Pole that provides about 4.5 dbd gain. These antennas can be built from EMT electric conduit pipe

technics, radio astronomy, great links, duplex filter

Home of Bosnia and Herzegovina Contest Operators

The 6 Shooter Net is a informal rag chew, swap net, and tech question net held on Sunday nights on 147.570 simplex in the Dallas/Fort Worth metroplex. See our website, www.6shooter.net for more information!

WA8MCQ modification for the Heathkit HW-7 transceiver

The Hidden Valleys Amateur Radio Club is a small friendly club located in the hills and valleys of Southwestern Wisconsin.

AM and vintage radio forum

Eden Valley RS, G0ANT Meets on last Thursday of the month at the Merlin Club Penrith

Keys from around the World

Collection of Telegraph Keys & related items

Articles and review on the Yaesu FT 817 by OZ9AEC

Eham users product review about the Yaesu VX-170 waterproof vhf ht transceiver

YI official web site

Founded in 1959

eHam reviews for the Kenwood TM 241 VHF mobile transceiver

Two receivers compared, Drake R8A and Palstar R30

Serving Henry,Knox,Stark,Rock Island, Mercer, Lee, Warren,Peoria,Bureau,Tazewell,Woodford,Marshall, Fulton, counties in Illinois and Scott county in Iowa.

W6OPO report on Icom IC-7700 stress test to verify PA integrity under high duty-cycle usage

Christians of Idaho Amateur Radio Club, Inc.

50 Ohm Coax Antenna Power Splitter and Matching Network

CEMARC is ARRL Affiliated Council of Clubs representing the Ham Radio Community in Eastern Massachusetts.

Amateur Radio reviews and software setups. Page contains software reviews for a number of Amateur radio software packages, services, and hardware reviews. Setups for various software, contests, hardware, and contest setups.

A schematic diagram of a homemade direct conversion receiver for 30 meters band

I5JVA Carlo Home Page

The Islands Of Croatia Award

MARCA - an amateur radio experimential and education organization in the Phoenix, Arizona area

i4chy 10 ghz tropo eme rs

SEAARCis located in Medicine Hat, Alberta

Peninsula Amateur Radio Club - W4MT - Newport News, Virginia

Homemade RF limiter project, to protect the K3 receiver front-end for high radiofrequency based on the original KD9SV project.

NFM (for Noise Figure Meter) is a software application to assist Noise Figure measurement. NFM implements the method of Agilent application notes AN 57-1 and AN 57-2 for noise figure measurement, but with the addition of an adjustable attenuator after the noise source and between the DUT and instrument.

QRP Operations by RV3APM

Traveling Wave Tubes , Conventional Traveling Wave Tubes, Microwave Power Modules manufacturer

Web Site Of WB1GRB Located in Stamford, Ct, US.

Putting the X7 at Science Festival 2004