Velleman PIC Programmer - K8048

Velleman PIC Programmer - K8048

Assembled from a kit, for programming a wide range of "PIC" microcontrollers. Designed to be...

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Uploaded on Dec 28, 2011

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Practical Wireless Crystal Calibrator - 3

Practical Wireless Crystal Calibrator - 3

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Uploaded on Oct 26, 2011

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Practical Wireless Crystal Calibrator - 2

Practical Wireless Crystal Calibrator - 2

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Uploaded on Oct 26, 2011

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Practical Wireless Crystal Calibrator - 1

Practical Wireless Crystal Calibrator - 1

A design from some time in the early 1980s, I think, or maybe a little earlier. A...

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Uploaded on Oct 26, 2011

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QRSS Transmitter - a Kit by QRP Labs

QRSS Transmitter - a Kit by QRP Labs

This type of little transmitter is used all over the world by "QRSS" enthusiasts. It comprises...

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Uploaded on Sep 29, 2011

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The Voltage Probe Antenna, almost complete

The Voltage Probe Antenna, almost complete

In fact, to move this project to the evaluation phase, all that was added aferwards were (a) an LED to...

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Uploaded on Aug 6, 2011

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The Voltage Probe Antenna under construction

The Voltage Probe Antenna under construction

In my garden shed (as if you couldn't work that out for yourself!) The entire circuit was constructed on...

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Uploaded on Aug 6, 2011

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TS-180S - PLL Diode Matrix

TS-180S - PLL Diode Matrix

On this board various functions are derived depending on the position of the band switch :- selection of...

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Uploaded on Jun 19, 2011

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Trio/Kenwood TS-180S PLL Unit

Trio/Kenwood TS-180S PLL Unit

Two (so far) completely unrelated faults have been unearthed and repaired in this unit - a faulty...

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Uploaded on Jun 19, 2011

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FT-107M - X-Lock installation

FT-107M - X-Lock installation

On the test bench. There was a certain amount of setting up required, getting the control loop time...

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Uploaded on Jun 4, 2011

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FT-107M X-lock - how it all fits ...

FT-107M X-lock - how it all fits ...

The X-Lock by Cumbria Designs fits beautifully into this radio, and performs as well as it looks!

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Uploaded on Jun 4, 2011

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FT-107M X-Lock, closer view

FT-107M X-Lock, closer view

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Uploaded on Jun 4, 2011

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TS-180S Memory Unit (well the control part of it anyway ...)

TS-180S Memory Unit (well the control part of it anyway ...)

Some classic early microprocessor technology incorporated into this revolutionary (for its...

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Uploaded on Jun 4, 2011

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TS-180S Under Repair

TS-180S Under Repair

The IF unit is swung out to allow access to the Memory Unit. Coilpack unit at the top (VERY Trio/Kenwood...

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Uploaded on Jun 4, 2011

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Old-Style 144MHz AM/CW  Crystal Controlled Transmitter - 3

Old-Style 144MHz AM/CW Crystal Controlled Transmitter - 3

Under the chassis, illustrating classical valve equipment construction techniques. Quite a bit of "tin bashing" was required!

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Uploaded on Feb 5, 2011

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Old-Style 144MHz AM/CW  Crystal Controlled Transmitter - 2

Old-Style 144MHz AM/CW Crystal Controlled Transmitter - 2

Inside view - the grubby condition is due to it languishing in my garage for more years than I care...

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Uploaded on Feb 5, 2011

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Old-Style 144MHz AM/CW  Crystal Controlled Transmitter - 1

Old-Style 144MHz AM/CW Crystal Controlled Transmitter - 1

This is how 144MHz VHF used to be done, in the late 1960s, early 1970s. A home built transmitter (By...

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Uploaded on Feb 5, 2011

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Homebrew Receiver Splitter - inside

Homebrew Receiver Splitter - inside

Works on the "Wilkinson" principle of parallelled transmission lines. Google...

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Uploaded on Feb 5, 2011

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