pa0nhc radio amateur and sound recording pages.
PA0NHC was born in march 29 1939 and VHF licensed in 1965. Full licensed in 1980. QTH: De Meern, in the center of The Netherlands, GPS 52.084849, 5.013264.
(C) The use, copy and modification of all info on this site is only permitted for non-commercial purposes, and thereby explicitly mentioning my radio amateur call sign "PA0NHC" as the original writer / designer / photographer /publisher.

To promote rebuilding my projects by hobbyists, i offer professional PCBs.
When you order one, consider it as participating in a kind of crown funding.
Antenna VSWR sweeper V2  
fast and easy display of the VSWR graph of antennas, filters and cables.
Magnetic Near Field Indicator
Tune your magnetic loop antenna for best radiation.
Famous pa0nhc version of "Miniwhip":
low IMD active DX antenna
Magnetic loop transformer matching PCB
for a 40m & 80m 10m circumference loop
NEW => Thru line rms 0.5mW to 200W RF power meter
 200MHz 0.5mW to 200W (-3 to +53 dBm). Adjustment-free.

20170923.  I ordered PCBs for the following projects :
1uW to 4mW rms RF low power meter with internal 50 Ohms load
2.5 GHz, -30 dBm to +6 dBm.  Adjustment-free.
  Noiseless 12Vdc / 185mA power supply for RFnoise-critical electronics (Miniwhip).
ARDFrx80 :
Advanced design for a 80m portable ARDF receiver.
Advanced design for a 2m portable ARDF receiver. 

How to  (Re)install PCB design software FreePCB succesfully under Windows10.
Go to RF subjects
short wave.
Go to

VHF subjects
144 MHz and 435 MHz.

Go to AUDIO subjects
High Quality microphone electronics.
Classical music recording.
Go to Misc. / Div.
Hoe PCBs maken.
BAD or GOOD capacitor types?
Lightning damage.
And more . .

2nd operator "Sokkie"

(i am a cat-man, who has
difficulties understanding dogs).