Search results
Query: UK
Links: 737 | Categories: 7
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UK CB radio forum for the Charlie Tango DX group, 11 Meter international DX group. -
Two modes of propagation at 50MHz E-layer & Sporadic-E by Ken G4IGO -
Website dedicated to Coastal Radio Stations, includes frequency lists for memdium frequencies maritime stations -
A simple accurate power splitter for the 70cm uplink to Oscar 13 -
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This article presents a technical investigation into spurious emissions from the Yaesu FT-847 transceiver when operating on the 70MHz (4-meter) band. The author discovered significant problems with both factory "UK spec" and modified units. Spectrum analysis revealed that when transmitting at 70.2MHz, the radio produces numerous spurious signals, with the most prominent emission at 45.6MHz measuring only 3dB below the fundamental frequency. The study also documents poor power efficiency on 4m (10.3% at 30W output) compared to 6m operation (23.5% at 30W). Tests verified that jumper configurations had no effect on filter selection. The author warns that using these radios on 4m may violate license conditions due to excessive spurious emissions. -
Circuit diagrams drake tr7, Schaltbilder Drake Tr7, antenna tuners, baluns, and home brew power supplies, dual tone ssb test generator, zweiton ssb test generator, zweiton testgenerator, dual tone test generator by DK4DDS -
news and views from the UK about the course of CB in the U.K. and Europe. -
Excellent slides explaining radio and radiowaves generation basics -
An unused 5v supply connection allows an electret condenser microphone element to be used in place of the standard dynamic element. Modification by M0UKD -
Working DX on a Dead 50MHz Band using Meteor Scatter, by Palle Preben-Hansen, OZ1RH -
Calculate online, ERP in dB and dBi given PWR Frequency Coax lenght and type and antenna type -
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This simple modification is applicable to pretty much any 12 volt operated, positive earth equipment. by Chris Cox, N0UK, G4JEC -
summary or overview of UK or British amateur radio callsigns or call signs and the types of licence used in the UK by ham radio operators. -
FM dx logs, MW carrier offset monitoring, lists of RDS codes in use in the UK, London pirate bandscan and much more from a London QTH. -
A simple and inexpensive way to connect an AR8000 to a portable computer -
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On-Line CB Radio and truck accessory shop based in UK -
An inverted Vee antenna calculator that consider also minimun vertical height and horizontal spread by M0UKD -
CB Radio and 10 meter Radio reviews & mods blog. Most articles are in Japanese -
This document details the design and construction of a Vinecom 6N4 dual-band Yagi antenna for the 50MHz (6-meter) and 70MHz (4-meter) amateur radio bands. The antenna features 9 total elements (4 elements for 50MHz, 5 elements for 70MHz) on a 4.236-meter aluminum boom. Computer simulations using MMANA software predict 7.21 dBd gain on both bands with front-to-back ratios of 16.01dB (6m) and 15.37dB (4m). The design uses 12.7mm diameter elements mounted on a 32mm square boom, weighing 5.7kg total. Practical measurements with an MFJ-269 analyzer confirmed good SWR performance across both bands after element length adjustments. -
This is an interactive design package for designing analogue (i.e. hardware) filters made of inductors and capacitors (Ls and Cs). -
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In the long history of beam aerials there has persistently existed the claim that certain types of aerials perform better than yagis. -
A PDF presentation of a home made moxon antenna for 50 MHz 70 MHz and 144 Mhz. The project is mainly out of surplus plastic Plumbing pipes and clips etc, and also details of how the dimensions were calculated. -
Small and inexpensive homebrew HF radio 5W Output, CW SSB AM FM, DSP, Speech Processor, Sprectrum Scope, Watefall Display. mcHF is a small, home-brewed amateur radio project. Firmware is released as open source. -
AM-6154 222MHz grid Conversion Information by N0UK -
The Amateur Radio Society of ROYAL SIGNALS (British Army), 1550 Members. MERCURY Journal issued three times a year (Editor G3NVK) Regular (daily) Nets. Awards and Contests. Own QSL Bureau. E-mail List Server open to all. Regularly updated Web Site (Web Master G3NVK) includes EASYMAIL facility, Guest Book, Photo Gallery, Society Rules, Military Museums. -
Homebrew a compact yagi antenna for 14 Mhz suitable for those with small plots based on a design by AB4GX -
Are you suffering from TVI? Then why not try this filter for size. It is a three-stage high-pass filter that blocks low-frequency 50MHz signals while letting through UHF TV. -
A javascript online calculator of bearing and distances by G4VWL -
Buy old manuals, military radios, kits, receivers online shop -
Luksa industries design and manufacture mechanically operated aluminum telescoping masts and telescoping tripods to support communications and military antennas -
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20 Watt Power Amp for Softrock or for QRP transceivers by M0RZF -
A DIY project of a WiFi 10 elements Yagi antenna -
Building a 2 metre 144MHz VHF Yagi beam antenna, designed for portable use. -
Dedicated to State-of-the-Art lightweight portable radio. Sotabeams produces and sells amateur radio products dedicated to ham radio portable operations. Antennas, supports and masts, filters, wires and more accessories for amateur radio. -
Personal Web Site of UX7CQ. Information about Ukraine. Old military radios collection. CW Straight Keys. -
An excellent introduction to ham radio bands, which bands to use and when. -
How to make a half l or quarter l coax cable for a specific frequency -
A magnetic longwire unun with a T130-2 Iron Powder core by M0UKD -
Centre fed half wave dipoles make great, simple and effective antennas for the HF bands. Sometimes however, the centre feed is not ideal. This great project will improve the overall antenna performance. -
An home made Butternut HF9V clone antenna by OH2GVB -
Six metre enthusiasts might like to experiment with this ‘Zig-Zag’ four-element vertical for lofts. Brian Williams, GW0GHF -
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