Tuesday, 4 December 2012

Finished Project : Single Coil Z-Match

On a bit of a roll here putting up pictures and brief descriptions of recently(ish) completed projects.
Pictured below is my Single Coil Toroidal Z-Match which follows a design by Lloyd Butler VK5BR .
This uses a T200-2 toroidal core and a couple of receiver type variable capacitors which allow a max input power of about 50 watts CW . This depends on the aerial in use i.e. short doublets may cause problems on lower bands but I used a 50ft doublet on 80m with no problems.
The clear lid is due to the capacitor vanes not clearing the box lid :-) looks quite nice...
Vernier drives are cool but hard to get at the right price these days. Got these at Maplins years ago.


Single coil toroidal Z-match (QRP)

4 comments:

  1. Very nice built Ian. The clear lid is a little unfortunate, but the piece of plexiglass does the trick. 73, Bas

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  2. Hi Bas ,
    Glad you like it.
    The box was left over from a failed transverter project , it has a few drilled holes out of view too.
    Works well though.

    73 Ian

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  3. Nice! The clear lid lets you see the innards! I'm assuming you did that because the tuner wouldn't operate properly with an all-metal lid?

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  4. Hi Dave,

    The capacitor vanes would not clear the lid of this recycled project box, a window seemed a neat solution and keeps the dust out :-)

    73

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