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Maplin Ranger 160m Receiver

Maplin Ranger 160m Receiver

Maplin produced another little receiver, in addition to the famous direct conversion project from 1988…it was called the Maplin Ranger.  The 160m receiver covered from 1.8 to 2.2MHz and was designed for AM, SSB and CW.  This time the receiver is a ‘proper’ superheterodyne design with an IF of 455KHz. I obtained one of these […]

Blekok Micro-40S SSB Transceiver

Blekok Micro-40S SSB Transceiver

The Micro-40S is a single board SSB Transceiver by Indra Ekoputro YD1JJJ.  I didn’t buy one of these thankfully, but a friend brought one for some TLC.  These things are supplied rather badly, ready built and working.  The one that came to me had a short circuit IRF510 output PA MOSFET.  An easy fix but […]

STE (Milano) 2m VHF Tx and Rx Modules

STE (Milano) 2m VHF Tx and Rx Modules

I recently acquired a homebrew transceiver from the Angel of the North Radio Rally.  It’s a 2m / 145MHz FM unit with crystal control, that outputs a heady 1W of RF.  Crystals are installed for the local repeaters and simplex channels used in the 1980’s, when people actually used 2m before upgrading to a class […]

3B/240M Tube on HF

3B/240M Tube on HF

Has anyone out there ever used a 3B/240M (CV2214) valve / tube in an HF amplifier? I came across one of these, new and boxed, amongst my collection of treasured family heirlooms…it looks like a miniature 5B/254M but isn’t.  The 3B/240M or CV2214 is a small grounded grid triode for use up to 200MHz.  It […]

SEI Crystal Filter Data

SEI Crystal Filter Data

Some years ago I acquired some superb…and originally very expensive…SEI Crystal Filters on 1.4MHz.  I knew I had a USB and LSB pair, but didn’t know which was which and had no idea about the correct termination impedance.  What I needed was SEI Crystal Filter Data…which no one had.  There have been lots of questions […]

The PW Epsom by G4AR

The PW Epsom by G4AR

As you may have gathered by now, I’m quite keen on homebrew equipment…I don’t mind whether it’s valve or solid state; I do however avoid SMD projects if I can.  One of my main interests is valve (or ‘tube’ if you live across the pond) receivers.  There are quite a few to choose from including […]

Maplin Direct Conversion Receiver

Maplin Direct Conversion Receiver

There was a time when radio hams and electronic hobbyists seemed to have more time to build things.  Maplin used to publish an excellent magazine in those days…for just 85p…that featured projects you could build, along with hints and tips for experimenters. In September 1988, Maplin introduced a really excellent Direct Conversion Receiver which many people […]

Toyocom TQF-456C Crystal Filter

Toyocom TQF-456C Crystal Filter

You probably found this page as a result of a Google search for the Toyocom TQF-456C crystal filter.  I seem to collect filters like this…in case they are useful in the future 😉 It seems that an eBay seller known as ‘hifissb’, who breaks down radios and sells their modules, has a large stock of […]

Microphone Connections

Microphone Connections

Finding the connection details for your favourite microphone or rig can sometimes be a bit of a challenge.  I recently came across G4WPW’s website which seems to contain the connection details for every rig I’ve heard of…and many that I haven’t. You can find it here.

 
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