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Kenwood TR-751E 6v Inverter Fault

Kenwood TR-751E 6v Inverter Fault

The Kenwood TR-751E is an ageing but still fantastic 2m (144MHz) multimode transceiver.  Like all things, me included, as they get older parts start to fail.  The TR-751E I had to repair had been dropped, which meant the RF Gain / RIT dual concentric potentiometer needed straightening…the main VFO knob had already been glued.  It […]

Evolve Theme Update

Evolve Theme Update

Just a quickie…I’ve updated my website theme to the latest version 2.0.0. For some reason half the header and logo images have been blotted out. In case you were wondering 🙂 …and now, 15 minutes later it’s sorted. …and today there is version 2.0.1, which fixes a few issues users have reported.

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 […]

Getting the RPi Wobbulator working on a ...

Getting the RPi Wobbulator working on a Raspberry Pi 2

This post is about getting your RPi Wobbulator working on the new Raspberry Pi 2 computer. It assumes you are already using one on the older Raspberry Pi’s. The Raspberry Pi Wobbulator Kit is available from Cut Price Cables and I can heartily recommend it..although there are quite a few SMD components to install. If […]

Volvo emblem, sticker, badge missing

Volvo emblem, sticker, badge missing

If you are the proud owner of a Volvo V70, V60, V40, XC70, XC90 or any other car in the range, you may have noticed that the Volvo emblem / badge / sticker or whatever you choose to call it, is either peeling or missing. Instead of the vivid blue rectangle with silver lettering, you […]

The Horophone Story

The Horophone Story

This is the story of an old and unique Edwardian radio, the Horophone…type ‘A’ in this case…and how it came to be discovered and shared with the rest of the radio fraternity. A bit of history first… In the earliest years of the 20th century, a certain Mr. Norman Hall, set up the North Eastern Instrument […]

Kenwood TS790E CTCSS

Kenwood TS790E CTCSS

If you are the proud owner of a Kenwood TS790E, you may be rather miffed that it won’t work with modern repeaters requiring CTCSS tones; the TS790E was made in the days of 1750Hz toneburst for repeater access in the UK. Both Kenwood and their dealers will probably tell you there’s nothing that can be […]

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 […]

Which Antivirus is best?

Which Antivirus is best?

I used to run a successful IT support business here in the North East of England…and you can be sure we came across every variant of antivirus software on the market.  So, which antivirus is best for protecting your computer?  I still get asked this a lot. Many home users and unbelievably, many businesses, still […]

 
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