The finished print:

From TOP of PRINT you find:

As it look now, the 12/10 and 6 meter filter has to be changed.

The amplifyer is tunning, after changing some wrong capasitors, only 10 pf, must be 100 nf, the smal blue spot on the print.

Be awhare of the amplifyer coils. Follow the description.

Remember to insert a damping on your VNWA input ( - 20 db ), for not do dammage ur VNWA.

A tiny Lab-Top is dedicated to the VNWA.
The LT is able to keep power for 5-6 hour while feeding the VNWA on battery.

That means 100% mobility, No weight, taking not mush place.

The VNWA also have possibility for Spectrum Analysing, so IN_ALL, a very useful instrument on field day and a measuring evening.

UPDATED 8.10.2011

To day the filter is optimized.

Old pictures is changed to new, with mush better measuring results.

The picture talk for it selv.

RETURNLOSS: -29.07 db

The cut-off frequency go down more than 55 db.

PUSH and PULL the coils to best result.

Just after the book!!

LOSS les than 0,5 db

RETURNLOSS -27 db 

The cut-off frequency go down near 60 db ved 60 MHz

Very close to the goal, and not to change any more.

RETURNLOSS: more than 26.5 db

Afskæringsfrekvensen falder fint 55 db

InsertLOSS: on 14 MHz er 0,65 db

RETURNLOSS: - 26,26 db

The 21 MHz band is better in this filter - I accept this result.

24 MHz :

RETURNLOSS: - 24.68 db

INPUTLOSS: er 0.7 db

RETURNLOSS: - 27.1 db

INPUTLOSS: between 0.77 til 0.8 db

Comming later.
10. Okt. 2011, Eksperiment with 50 MHz filter

OZ6YM, Palle, den 3. oktober 2011.