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HF-Index of pa0nhc technical HAM pages.

Since 20150113 this site is located at: http://www.pa0nhc.nl/ 
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.


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EN = Read this article in English language     NL = Lees dit artikel in Nederlands

NL

EN

Adjustment-free, accurate active
rms RF low power meter
with internal 50 Ohms load.
32kHz - 800MHz (max. 2.5Ghz).
2 ranges, FSD = -14 and +6 dBm.

Measuring 1uW to 4mW.
Cheap SMD components.
Optimal double sided SHF PCB design.
(Battery) powered 4 - 5V, 3 - 8mA.
Dedicated dBm scale drawing available.

pa0nhc 20170922

Special designed double sided PCB, 33mm x 33mm small,
will become available.

[Article is now being edited]


Bottom side first tested prototype.
The PCB with new layout will become available.

NL

EN

Adjustment-free, accurate active
thru-line rms RF power meter.
16 kHz - 200MHz (and higher).
3 ranges, FSD = 0.02 / 2 / 200W.
Measuring 0.5mW - 200W ( ! ! ).
(-3 dBm to +53 dBm).
Cheap SMD components.
Optimal double sided VHF PCB design.
Battery powered 3xAAA 3-8mA.
Standard ABS housing 9 x 9 x 6 cm3.
Dedicated dBm scale drawing available
(see photo).

pa0nhc 20170916
Preliminary development data.
Special shaped, double sided 70mm x 35mm PCB,
 which interconnects both BNC busses,
is available.


Without any adjustment immediately correct +50 dBm indication
with 100W RF from a TS570D.

NL

Voorkom dat lichtnet storing uw radios bereikt :

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

NL

EN

Magnetische veld sterkte indicator voor magnetic loop antenne. 
Op afstand afleesbaar.
Stem uw raam antenne werkelijk resonerend af.
Goedkope onderdelen.

PCB sets are available.
20170721
Printen setjes zijn beschikbaar.

Magnetic field strength indicator for magnetic loop antenna.
Remotely readable.
Tune your loop antenna for real resonance.
Cheap components.



                         Display unit  9x9 cm                             Antenna unit  5 x 5 cm2

EN

NL

Easy and fast VSWR plots of antennas and filters on a laptop.
Complete with all software.

New version PCB#75 is 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.


Makkelijk en snel VSWR grafieken van antennes en filters op een laptop.
Inclusief alle software.

Nieuwe versie 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 (max. 70MHz).

EN

NL

Active capacitive
wideband DX receiving antenna.
! Clean reception. No IMD !

20170828
Improved schematics.
Insertion loss only 0.6dB.
Fused splitter.
Max. output 2Vrms (S9+92dB !)
50kHz to 30MHz.
Fully class A circuitry.
New double sided PCBs now available.

Aktieve capacitive
breedband DX ontvang antenne.
 ! Schone signalen. Geen IMD !


Completed Miniwhip version 13, fused, new type T2, optimal setup of T1.

EN

NL

Simple noise free power supply. 
Perfect companion for the Miniwhip.
230V~in, 12V/185mAdc out.
PCB fits into a Hammond 1554JGY abs box.

Mask drawing for DIY PCB is available.
A professional double sided PCBs will become available.
With instructions for wiring without a PCB.
20170921

Eenvoudig stoor vrij voedinkje. 
Perfect voor de Miniwhip.

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 !


New 40/80m matching transformers PCB available.

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

Radically new designed :
Top quality 80m ARDF direction finding receiver.
With build-in ferrite antenna.
Small and light..
Very sensitive.
Gain adjustment range 100dB.
Constructed with modern and cheap
commonly available components.

01409

Radikaal nieuw ontworpen :
top kwaliteit 80m ARDF vossejacht peil ontvanger.
Met ingebouwde ferriet antenne.

Klein en licht.
Zeer gevoelig
Gevoeligheid regel-bereik 100dB.
Volledig opgebouwd met moderne, goedkope,
algemeen verkrijgbare onderdelen.

Professional double sided PCBs will become available soon =>

See also the 2m version.


145 x 39 mm2

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, developed by pa0nhc.
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 ontworpen door pa0nhc.
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.

PCBs available on request.


New version tuning unit + noiseless power supply PCB.

EN

NL
Finding radio-noise-sources using a special wideband AM receiver "EMV-spy".

Radio storing bronnen zoeken met een "EMV-spion".
NL The ongoing experiment : 600W PA with BLF188XR. It takes so long because lack of funds HIHI.
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.

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.

Symmetrical dipole feeded with coax at one end


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

De-noised 12V PC SMPS. 
Cheap 12.1V / 35A power supply for 100/200W transceivers.

Goedkope 12.1V / 35A 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.