5 pole Cauer filters for the HF bands
To build a solid state amplifier today, one has the availability of many fets. Preferably Ldmos as this is the most sturdy and the most […]
To build a solid state amplifier today, one has the availability of many fets. Preferably Ldmos as this is the most sturdy and the most […]
This design is based on the Motorola (now Freescale) application note AR305. Instead of using the Motorola FET I used the Philips Gemini FET BLF278 […]
To protect my 50 & 70 MHz transceiver against high RF from the HF station, the antennas are only separated 1 meter apart I designed […]
Leo ON6LEO needed a preamp as a second stage. I needed a preamp for 432 MHz and also one as a broadband measurement preamp. The […]
I was in need for a 10 MHz and 432 MHz diplexer. Low power in order to feed a 10MHz signal on the same coax […]
To loose some drive power on 50MHz I made a Wilkinson divider. This splits the power in two ports. In my case one port was […]
The filter was build in a tin box 160x100x50mm. All inductors are wound on a 20mm dia. Wire thickness is 2mm copper wire. Capacitors are […]
When looking for a new transceiver from HF up 50 & 70 MHz I was disappointed by the antenna outputs, just ONE, better ONLY ONE. […]
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