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HF-Index of pa0nhc technical HAM pages.

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NL

Net storing filter (23,52E)
of
Ultra isolation transformer ($835) ? 

NL

EN

Op afstand afleesbare magnetische veld sterkte indicator voor het optimaal afstemmen van een raam antenne.
Goedkope onderdelen.

Still developed   20170706   PCBs will become available

Remotely readable magnetic field strength indicator for optimally tuning a loop antenna.
Cheap components.



NL

EN

Easy and fast VSWR plots of antennas and filters on a laptop.

Een beperkt aantal PCB#75 is beschikbaar.
- Goedkopere BNC behuizing bus
- makkelijker te solderen 6 pin SOT-23 ICs
- 35mil gaten voor makklijker plaatsen van de boards

   20170621.

Antenna VSWRsweeper V2
With Vrms-to-Vdc converters
0.05-30MHz (70MHz).

A limited number new version PCB#75 are available :
- cheaper BNC chassis bus
- 6 lead SOT-23 ic's for easier soldering
- 35mil holes for easier fit of both boards into the main board

EN

 

 

NL

Active capacitive wideband DX receiving antenna.
100kHz to 28MHz.
Real class A circuit => ! NO IMD !

Schema 8 / PCB 11 ver. 20170711

Aktieve capacitive breedband DX ontvang antenne.
100kHz tot 28MHz.
Volledig in klasse A -> ! geen IMD !

EN
NL

Silent and noise free power supply. Simple, small.
Perfect companion for a active receiving antenna.

 

Stil en stoor vrij voedinkje. Klein, eenvoudig.
Perfect voor bij een actief ontvang antennetje. 

12V/185mAdc.

EN

 


NL

All weather outdoor magnetic loop antenna for transmitting on 40-(60)-80m
with optimal cost / performance ratio.

>> Perfect broadband transformer matching <<.
New 40m+80m matching transformer-set, remotely switch able.
NO TVI / BCI
35mm copper water pipe radiator for max efficiency on 80m.
THICKER IS MORE EXPENSIVE, BUT NOT BETTER !


20170614

Weerbestendig magnetisch zend raam voor 40-(60)-80m
met optimale prijs/prestatie verhouding.
>> Perfecte breedband transformator aanpassing <<
Nieuwe, op afstand omschakelbare, 40m+80m transformator combinatie.
GEEN BCI / TVI
35mm dikke straler van  koperen waterleiding buis met maximaal rendement op 80m.
DIKKER IS DUURDER, MAAR NIET BETER, DUS ZINLOOS !

NL

EN

 

Antenna SWRsweeper V1
re-editted 20170404
 With diode-compensating buffer stages

With mask for DIY PCB

Easy and fast SWR plots of antennas and filters on a laptop.


SWR curve of my 10m circumference loop.
Sweeper connected at the transmitter end of the coax.

EN

 

 

 


NL

If i get enough response, i will provide professional PCBs.

Radically new designed
top quality 80m ARDF direction finding receiver
with all build-in antennas.

Very small, light, very sensitive,
Sensitivity adjustment range 100dB.
Constructed with modern and cheap,
commonly available components.

01409

Radikaal nieuw ontworpen
top kwaliteit 80m ARDF vossejacht peil ontvanger
met volledig ingebouwde antennes.

Klein, licht, en toch zeer gevoelig.
Gevoeligheid regel-bereik 100dB.
Opgebouwd met moderne, goedkope,
algemeen verkrijgbare onderdelen.


Several 80m ARDF receivers i developed and used.
The two most right ones are presented in this article.

EN

 

 

 

 

 

 

 

 

NL

     MAGNETIC 80m band receiving antenna.
Build-in noiseless power supply.
Remotely tune able.
A
daptable for other SW- bands.
Perfect for NVIS (reception of regional signals).
Small, u
nsusceptible.
                               SPECIAL:
Single coax connection between tuning- and antenna unit.
Optimal sensitivity.
Can suppress local noises if rotate able.
Nearly all wired, standard components.

MAGNETISCHE 80m band ontvang antenne.
Inclusief storing-vrije voeding.
Op afstand afstembaar.
Aanpasbaar t/m 14 MHz frequentie banden.
Perfect voor NVIS (ontvangst van regionale signalen).
Onopvallend klein, slechts 15x10cm.
                               BIJZONDER :
Enkelvoudige coax verbinding tussen antenne- en afstem eenheid.
Optimaal gevoelig en selectief.
Kan storingen onderdrukken, indien draaibaar opgesteld. Nagenoeg alleen bedrade standaard componenten.

Beware for a bad copied commercial version.


Old antenna unit (Proto type).
In the new design T2 is a BD139.
The connecting cable should be a thin coax.


New version tuning unit + noiseless power supply PCB.

EN
NL
Finding radio-noise-sources using a special wideband receiver "EMV-spy".
Radio storing bronnen zoeken met een "EMV-spion".
NL The ongoing experiment : 600W PA with BLF188XR.
EN

The "pa0nhc Cobra" symmetrical wire antenna (3.5-14MHz).
This could be THE solution if you want a symmetrical antenna, but you cannot connect a feeder to the center of a antenna.

Feeded with coax at the beginning of the wire radiator.
>>>>> Yet a symmetrical dipole antenna. <<<<<

Minimal induced RF in mains wiring, speaker cables, telephone line => No TVI / BCI !!!!
Low received noise level.
No transformer, just one dedicated coax choke.
Matches to 50 Ohms on lowest band (making strong NVIS signals).
Needs asymmetrical tuner on higher bands.


VERY SPECIAL ====>>

Impossible ? Another "wonder antenna" ?
Check it out !

(In the future i will try to design e new, easy to install, choke construction).

EN


NL

Xfilt DEMO

Xfilt : Filter voor lokale storingen.
Incl. aktief storing antennetje.

Xfilt : Canceling filter for locally generated noises.
Including active noise antenna.

EN

 

NL

The grounding and de-noising
of my antenna system.
20160526
De aarding en ontstoring van
mijn antenne installatie.

EN


NL

- Improved automatic tuner for loop antenna.
Pure analog (Without software).

- Verbeterde automatische tuner voor een raam antenne.
Puur analoog (zonder software).

EN


NL


Cheap power supply for 100/200W transceivers : de-noised 12V PC SMPS. 

Goedkope voeding voor 100/200W zendontvangers : een ontstoorde 12V PC voeding.

EN

NL

De-noising a common used scoot mobile charger.

Ontstoren van een algemeen gebruikte scootmobiel lader.

NL

 

EN

Ferrite transformer experiments.
EN


NL

- Simple adjustable DC tune-motor driver.

- Eenvoudige regelbare DC afstem motor besturing.

EN

2 Watts 80m CW or AM transmitter for ARDF.
2W CW into 50 Ohms load, 0.5W AM, externally modulated into 50 Ohms load.
Sturdy, withstands very high SWR.
Fixed accurate frequency without adjustments.
Unconditionaly stable and sturdy.

Special designed single sided PCB for good performance and good efficiency.
Resulting in a well filtered signal, no parasitics,
 
If using a 50 Ohms antenna, setup in the field without further adjustments.

2013

EN

80m 65mW AM foxoring transmitter.
Including adjustable modulation tone.
Well filtered, clean signal.
No adjustments with 50 ohms antenna.
20130505

EN

80m beeper
(mini-TX "Sputnik").
Single frequency, simple, stable, clean signal.
CW keyed.
Well filtered, clean signal.
No adjustments.
201305

EN

Directional couplers, HFout and DCout.
7  PCB designs for various connectors and housings
for a DIY double sided PCB.
No coils nor ferrite.
Use able up to 440MHz.
For milliwatt filter in/out SWR measurements and 50W power meters.

Easy, cheap, dependable.