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7 Elements YAGI for 144 Mhz  ^{updated  pop} - The QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz SSB/MGM band, in PDF Format

GM4XRF Loop antenna plan - A motor driven magnetic loop antenna 1.5 meters square for 3.5-10MHZ by GM4XRF

HF J-Pole antenna - A Simple Nondirectional Antenna for Ten Meters QST February 1950, Easy to build J-Pole antenna for restricted space.

Spy Radios - This is a CIA RS-1 Spy Radio from the early 1950's

AR88 page - This model was introduced in the early 40's to replace or augment the HRO in applications demanding a more onerous duty than basic operational point-to-point communications such as intercepting coded axis radio messages during WWII.

Antique automobile radio repair - Repair antique automobile radios and offer old car radio GM & Ford schematics from the 1930's. providing free estimates and partial list of schematics

Papa Uniform - CB radio club established in Ireland, lots of information for beginners and members..

30m QRSS Junkbox Beacon - This simple 30m QRSS beacon is built entirely out of junkbox parts, the only component purchased specifically for this project was the 10,140kHz crystal.

Central Arkansas Radio Emergency Net - The C.A.R.E.N. Club is one of the oldest amateur radio clubs in Arkansas, dating back to the late 1950s. Just as the name implies, the C.A.R.E.N. Club is the state leader in emergency communications, SKYWARN, Amateur Radio Emergency Service (ARES), Radio Amateur Civil Emergency Service (RACES).

BYU Amateur Radio Club : Home - Founded in 1949 and officially recognized by the FCC in 1950, the BYUARC has many years of service at BYU. Experiencing second generation club members and a continuous committment to BYU and the ham radio community, the club continues to go strong and progress

M3GMN Andy - Personal radio ham and vespa scooter site

Boulder County, Colorado Sheriffs Office Live Radio Feed - Using two Motorola MT500 handheld radios

Monrovia PD CA - Include frequencies for Rose Parade and Rose Bowl

Radio Ham Zone Net Ring - Radio Ham Zone Net Ring - Amateur Radio related information including SSTV - Packet - CW - Software - Offers a links directory and much more.

Mobat Communications - HF-SSB radio products Accessories, Amplifiers and Antennas tuners. Established in 1995 as a joint venture between Motorola's Land Mobile Product Sector and Bartal Electronic Enclosures Ltd.

Allied Wire and Cable - Allied Wire and Cable is a distributor and manufacturer of electronic and electrical wire and cable, tubing and cable assemblies. We also specialize in custom cable design, flexible cable, and many types of cable and wire requirements.

Navstar GPS - GPS signal characteristics, system time, system segments, frequencies

USCG Navigation Center DGPS - Differential Global Positioning Service (DGPS) is a land-based augmentation system that receives and processes signals from orbiting GPS satellites, calculates corrections from known positions and broadcasts these corrections via a Medium Frequency (MF) Transmitter to DGPS users in the Broadcast Site’s coverage area.

Amateur Radio Propagation RSS (XML) Live Feed - Live space weather and propagation data, in RSS (XML) format.

BR-universal-Filt - Freeware real time DSP filter particularly for applications of amateur radios , IIR, FIR filter, low-pass, high-pass, band-pass filter, band suppressor (notch filter) individually adjustable

Spectrum Lab  ^pop - DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more. Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle

SV2AGW AGWDXClock - GMT and local time windows clock

Argo - Argo is a freeware windows viewer for MTHELL, Slow CW, like QRSS and DFCW. Can be used for EME operations by I2PHD and IK2CZL

Motorola Micor Highband Preamp - Make 150.8 - 174 Mcs. RF Preamp properly tune the Two Meter ham band.

Motorola Radius M110 modification - Turn a professional 2m VHF FM PMR transceiver Motorola Radius M110 into an amateur radio