LZ1SWE RADIO STATION

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As most of you surely do, I work on multiple projects at any given time. Some of them are moving really fast and some are gathering dust and slowly getiing robbed of parts... But that's the way of the ham! :) 

The contents of this page have to be prepared and uploaded. Keeping in mind the pretty large number of projects, it will take some time.

A short list:

1) Differential T automatic analog antenna tuner.

Status: I have bought two variable capacitors with 3.5mm spacing, toping 480pF, a roller inductor with 19uH of coil. I'm working on the control strategy now, at this point it's Return Loss control (Stockton bridge + AD8307 Logarithmic Amplifier (measure accurately low power)). I'll be using servo feedback loops, similar to the ones used in the Icom AT-150 that I have. I'm looking for proper motors/gears/multiturn pots.

Update 21.07.2018 - Almost done with the breadboard version! Just have to add the metering section OPAMP. Will post pictures soon.

2) Icom IC735 PC interface

Status: Built and running!

73 de
LZ1SWE, Bill