G3RJV's VXO circuit

The article by G3RJV describes the VXO circuit for various bands. It describes the values of capacitors and inductors on the circuit. It can be a good reference for VXO.

Base Biased tuned VFO

VE7BPO has an interesting article about VFO. It calls the base biased tuned VFO. You can see the 7MHz VFO with three transistors (2N3904s). It covers 6.932MHz to 7.067MHz with 10KOhm variable resister.

DDS VFO for the QRP kits (KEM-RX7 and KEM-TX7)

Kida Engineering Manufacture (KEM) has the BBS for their kits. You may read those message with automated translation from Japanese to English.
The release plan of the DDS VFO is shown with the PCB layout. The new board has DDS-VFO, side-tone, keyer, power supply to KEM-RX7 and KEM-TX7 (why doesn't it have the English page?). I expect that it will be released soon. He mentions the board will be received on Aug. 10 in 2007.

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The DDS VFO kit is available through dx-orders. Here is the detail information of the kit.

PE+SUS (Light-weight antenna wire by Saga Denshi)

The light-weight antenna wire has been found. It is made by Saga Denshi. It weighs only 110g for 22 meters. This page sells at 1380 JPY for 22 meters. It can be used for 40M dipole antenna for 1/2 wave.

When I make my own antenna, I purchase it for HF antennas.

40m CW transmitter by KEM

Kida Engineering Manufacture (KEM) has introduced the 40m CW transmitter kit (KEM-TX7-CW).

The picture is the transmitter board. It is 7.003MHz CW transmitter. You may put your own osicallation input with the external input. It costs 3500Yen for the kit.

The transmitter can work with

KEM-RX7 (40m receiver).

There is no English description, but you can contact KEM about the transmitter kit. Because KEM-RX7 is now shipped to worldwide and they can accept Papay for KEM-RX7 ($36.00+shipping$13.00).