PE4KH Amateur radio - Koos van den Hout

Most recent QSO's for PE4KH

Callsign Band Mode Locator RST(R) RST(S)

I passed my novice radio amateur exam in March 2013 and I registered the callsign PD4KH (pappa delta four kilo hotel!). I passed my full radio amateur exam in March 2016 and I registered the callsign PE4KH (pappa echo four kilo hotel!).
PE4KH on
PE4KH on

I am usually located around maidenhead locator: JO22NC

QSL policy for PE4KH

I upload logs to during and after being active on the radio. I upload logs to ARRL Logbook of the World, on a regular basis. I like paper cards via the QSL bureau so I send those out and I will respond when I receive those. Notifying me via e-mail that you would like a card is also possible.

I appreciate SWL reports for QSOs.

gallery of eQSL cards received by PD4KH and PE4KH.


Antenna rotor project
Amateur Satellites
D-Star digitale amateur radio (Nederlands)


Recent contact (QSO) map for PE4KH embedded using google maps
Mapped HF contacts by PE4KH gridsquares contacted (red) and confirmed (blue)
Mapped 10M contacts by PE4KH gridsquares contacted (red) and confirmed (blue)
Mapped 20M contacts by PE4KH gridsquares contacted (red) and confirmed (blue)
Mapped 30M contacts by PE4KH gridsquares contacted (red) and confirmed (blue)
Mapped 40M contacts by PE4KH gridsquares contacted (red) and confirmed (blue)

The 'hamradio' items from my homepage

2016-09-22 Amateur radio antenna camouflage
I am considering putting a vertical antenna for the 2 meter and 70 centimeter amateur bands on our roof. But I would like such an antenna to be as invisible as possible. One step will be to put it on the back of the dormer, as close to the center of the roof as possible. This would make it hard to see from the front side and from the backyard.

Another option for making an antenna less visible dawned on me when I saw an antenna at our radio club recently that was spray-painted in a red/brown colour to blend in with brickwork: it is possible to pain the outside cover of an antenna as long as the paint does not interfere with the radio frequencies.

One article I found out about this is at Diamond X50 Antenna Camouflage which describes an elaborate attempt at camouflaging a Diamond X50 antenna.

My choice of colour would be some sort of grey colour to be less visible against the average sky around here.

2016-09-09 First part of the lightweight outdoor radio antenna: the balun
After building and testing the Sotabeams dummy load I had time to work some more on the ordered parts. The main part of the order at Sotabeams was parts for outdoor antenna building: an antenna centre and 1:1 balun and linked dipole portable HF antenna kit.

The HF antenna kit does include parts for a simple centerpiece/balun but I decided to get a separate balun that should make these things easier and/or sturdier.

The balun build was doable, but soldering coax on the connectors gave a bit of a problem as the solder did not want to flow on those connectors very well. Maybe clean them next time or even sand them a little to make that easier.

Next part will be the rest of the HF antenna for which I will need an antenna analyzer and time outdoors in the daylight.

2016-09-06 Je draadloze microfoon is prima af te luisteren
Draadloze microfoon, bron Vandaag was ik op een plek waar regelmatig draadloze microfoons gebruikt worden bij presentaties en/of grote vergaderingen. Er was recent een probleem waarbij geluid van andere gebruikers van het gebouw te horen was op de geluidsinstallatie, en dat bleek na wat zoeken ontvangst van de "verkeerde" microfoons te zijn.

Er ging toen ook een lichtje op dat draadloze microfoons prima af te luisteren zijn, wat in deze omgeving niet altijd een prettig idee is. Met een scanner die wide-fm en een groot bereik aan UHF frequenties aan kan is het prima mogelijk naar analoge "Program Management and Special Events" (PMSE) microfoons te luisteren.

2016-09-01 I built a RF dummy load
I ordered some parts for building a lightweight outdoor radio antenna. But while ordering I had a look around and noticed the BOXA-LOAD 50 Ohm RF Dummy Load - Sotabeams, a kit for building a dummy load. So I ordered one in kit form, with enclosure.

Boxa load dummy load A dummy load is for testing radio circuits, it gives the radio the ideally matching load since radio transmitters ideally expect a 50 ohm resistive load. A dummy load does not convert the electric energy into radio waves, it just converts the electric energy into heat in the resistors.

I currently have an RF power meter on loan which I could use to test the dummy load so the dummy load was the first project to build and test.

Boxa load dummy load Building was no problem with the very clear instructions given by Sotabeams. And after building it I tested it and found it perfect as designed with no reflected power. The maximum power input is 20 Watt which it can handle for 1 minute and will need to cool down again for 10 minutes.

2016-08-23 Upcoming SCC RTTY contest
I am planning to participate in the SCC RTTY contest 2016. I participated in the SCC RTTY contest 2015 as PD4KH within the limits of my novice amateur call. It depends on the local noise levels whether I will end up in the single operator 20 meter, single operator 40 meter or single operator all band low power.

2016-07-24 My own outgoing eQSL design
I decided the picture of the recent outdoor activation was nice for a personalized eQSL design. It took some serious work with Gimp to make it turn out like I want it, and that was just with one image to work with and I'm still not completely satisfied.

In the result will be an overlay at the bottom with the details of the contact.

I used the Kenteken generator by Remco van Zuijlen to generate the callsign image.

2016-07-22 Complete powerdown does not help against RF noise
On wednesday everything in our house was switched off due to some electricity work. I prepared for this and made sure the radio was connected to a charged battery.

And the end result was that the noise levels around our house are at least the same when power is out. In the 20 meter band I noticed even stronger carriers which may be caused by the fact that the local VDSL modem was powered off at that time. I made one contact which I logged on paper with OE2YOTA the youngsters on the air camp in Austria.

I guess I will have less noise when the power fails in a wider area, as reported at This is what HF sounds like during a power outage at my QTH!

2016-07-17 I participated in the DMC RTTY Contest 2016
Again another weekend in which I had some time for digimode radio contacts and digimode contesting turned out the best way to get a high number in the log. There wasn't a lot going on in the 20 meter PSK31 band so I listened in RTTY and found the activity.

This was the weekend of the Digital Modes Club RTTY Contest 2016. Propagation and local noise weren't cooperating a lot but in the end I made 62 contacts. I set my contest category to SOAB-LP-12h: single operator all bands (although I only made contacts on 20 meter, but this contest does not have categories per band), low power (less than 100 watts), time limited to 12 hours (I operated less than 12 hours and had a good nights rest).

Interesting results were a new country: Saudi Arabia, I made a contact with 7Z100. No USA contacts this contest, which I usually expect in a RTTY contest.

I used my fldigi digimode contest macros without any modifications and they worked fine. Calling CQ yielded zero contacts, everything was done search and pounce style.

2016-07-13 Another go at outdoor portable operating at a new location
Outdoor setup with amateur radio I recently came across another spot that looked very good for outdoor radio operations. At a bend in a road near Maartensdijk is a nice spot with a number of trees and a table.

So when I had some time I hooked up a trailer to my recumbent bicycle, loaded enough radio gear to make some voice (phone) contacts and went over there to give it a try.

It is a nice spot, located at JO22ND88SW. Not a lot of trees so it got quite windy. Radiowise the 20 meter band was completely free of interference: I managed one contact with TA1BX/M and my honest signal report was 5-by-0: radio quality 5 (good understanding) and signal level 0: the meter on my radio did not move. He gave me a 5-by-5 report.

I heard several other stations that did not hear me due to the bad antenna situation (part of the endfed was on the ground) or due to the pileups they caused. I set my HF output power to 50 watt to get out a bit, this did not drain the battery too fast.

Things I brought along: radio, antenna cable (RG-58 cable, not as good as Aircell-7 but a lot less weight), BNC to PL259 adapters for the cable, the endfed antenna, two charged 12V batteries, headphones, a tablet computer for logging, nylon rope and a filled waterbottle.

Things I can improve for next time: throwing the rope for the antenna into a tree (it took several tries to get a somewhat acceptable height). And I looked into logging on paper, logging on a tablet was not very comfortable. Maybe logging on old-fashioned paper can be the solution, I found some nice templates at Amateur Log book templates. I printed a few of the 'mobile' template and I will try those next time.

Update: The locator was JO22ND88SW and not JO22ND88RU. At this resolution it does matter when the GPS application says the estimated error is 88 meter.

2016-07-09 An actual 10 meter contact with my PE4KH callsign
Checking around the bands where I can do PSK31 I noticed actual activity on 28.120 MHz (10 meter band) and had a contact there with IZ8OYV. Just one answered CQ and no other contacts.

The sunspot cycle is clearly past its peak with days without any active sunspots showing up, and this lowers the maximum frequency at which radio propagation in the ionosphere happens. So currently a 10 meter contact is very rare where the first HF contacts I made at home in August 2014 were all on the 10 meter band.

Update 2016-07-11: And two more 10 meter contacts in the log.

Items before 2016-07-09
This page is created by Koos van den Hout, contact information at the end of my homepage.
Other webprojects: Weatherstation Utrecht Overvecht, Weather maps, Camp Wireless, wireless Internet access at campsites The Virtual Bookcase book reviews,
This page generated by $Id$ in 0.035860 seconds.