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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

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

Shrine Temple Amateur Radio Club

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.

Poole Radio Society G4PRS, located in Poole, Dorset.

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.

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

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

Rewinding solenoid coils and how to article

Home of Bosnia and Herzegovina Contest Operators

WA8MCQ modification for the Heathkit HW-7 transceiver

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

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

Keys from around the World

technics, radio astronomy, great links, duplex filter

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.

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

Founded in 1959

I5JVA Carlo Home Page

This page provides a list of scanner frequencies for hams in the UK. It offers a comprehensive guide for ham radio operators looking to find and tune into various frequencies for communication. The page is useful for hams who want to explore different channels and connect with fellow operators in the UK. Whether you are a beginner or an experienced ham radio enthusiast, this resource can help you discover new frequencies and expand your communication network.

i4chy 10 ghz tropo eme rs

Peninsula Amateur Radio Club - W4MT - Newport News, Virginia

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

QRP Operations by RV3APM

SEAARCis located in Medicine Hat, Alberta

Putting the X7 at Science Festival 2004

Using Spectrum Lab for the reception of VLF natural radio

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

VHF beacon Located in JN58ic

Personal web site

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

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

Serving the Community and Amateur Radio for over 50 Years

5H/ZS6GH C91/ZS6GH / 3DA1GH

Serving Akron, Ohio, Summit County and the surrounding area since 1981

The understanding of the A and K indexes will become a very important issue when one begins serious HF operation.

50,006.0 MHz from LL55SH by Qatar Amateur Radio Society

VB2C VC2C VB2V VB2R

Information about Starved Rock Radio Club and PRINCETON HamFest

How-to decode and Display APRS Packets from WebSDR Audio using linux computer