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pytey

Member

Registered: 2010-01-08

Posts: 3

my 'sternzwirn' 13.56 MHz antenna

I've made a HF antenna using a commonly available coil former that is available by raiding your mother or wife's sewing basket

This uses the 'sternzwirn' cotton reel which is a popular cotton supplier here in Hungary and I believe the rest of Mitteleuropa :-) google 'sternzwirn'  and you'll find suppliers of this reel for around 1-2 Eurotokens.

Take a hirose connector stripped from a cable and tinned like so -

Attach the wire to the eyelet (this is from the hirose cable) -

Wrap around the lugs, weave around, up and down, around and around (4 complete turns) and solder to the hirose connector add a blob of hotglue and electrician's tape for cosmetic appeal -

Enjoy your antenna, it gives very good results and the whole antenna is sturdy and doesn't lose the shape.

-- pytey

Last edited by pytey (2010-01-08 17:42:30)

proxcat

Contributor

Registered: 2008-11-28

Posts: 62

Website

Re: my 'sternzwirn' 13.56 MHz antenna

Best antenna ... ever!

danymag

Contributor

Registered: 2010-01-01

Posts: 17

Re: my 'sternzwirn' 13.56 MHz antenna

pytey, this sure looks great. Could you give us some measurements ?

1) How good does the antenna register with tune ?
2) What is your C35 capacitor value (47pF or 100pF) or if you don't know, where did you get your board from ?
3) What is the diameter of the coil ?

pytey

Member

Registered: 2010-01-08

Posts: 3

Re: my 'sternzwirn' 13.56 MHz antenna

C35 capacitor is 47pF.

I've got between 13-14V from the two antennas that I've made.

Last edited by pytey (2010-01-09 13:31:09)