PH4X

Author's details

Date registered: 14/10/2013

Latest posts

  1. RSGB 144 MHz May contest 2017 — 22/05/2017
  2. Preparing 23cm station — 11/05/2017
  3. May 2017 VHF-UHF contest — 08/05/2017
  4. Antenna maintenance and QRV on 50/70 MHz — 08/05/2017
  5. N1MM+ and Icom IC-7300 Waterfall — 30/04/2017

Most commented posts

  1. Build your own Hytera cable — 21 comments
  2. Hytera MD785(G) noise modification — 6 comments
  3. Hytera X1p: First impressions — 6 comments
  4. Ordered some new antennas — 5 comments
  5. Going topbands with new loop — 5 comments

Author's posts listings

May 22 2017

RSGB 144 MHz May contest 2017

Last weekend the RSGB held the annual 144 MHz May contest. I’ve made 17 QSO’s on Saturday. Just for fun. The log is send as checklog. I”ve made one mistake with G3WSK’s locator. UT1FG/MM was a surprise as operator, active from his boat on the Northsea. The band was quiet dead. ODX was M0WYB with …

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May 11 2017

Preparing 23cm station

I’m preparing my 23cm station. Last weekend I’ve made some QSO’s during the May contest but with a very limited set-up. Time to have some more punch. Onboartd is a Gemini SSPA easily capable of delivering 180 Watts. More than enough for the 120 Watt limit here in the Netherlands for bands above 1 GHz. Also …

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May 08 2017

May 2017 VHF-UHF contest

Active on 144 and 432 MHz. New was 1296 MHz with a (very) limited set-up: 15-elements yagi (120cm boom) without pre-amp and 10 Watts of output power. Still able to work Belgium, Germany and England.

May 08 2017

Antenna maintenance and QRV on 50/70 MHz

Last weekend I’ve performed some antenne maintenance. The LNA’s for 144 and 432 MHz are in place. I also mounted a small 15-elements antenna for 1296 MHz (23cm). During the contest last weekend I was able to make a QSO with Belgium, Germany and England with only 10 Watts of power and no LNA. I even …

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Apr 30 2017

N1MM+ and Icom IC-7300 Waterfall

The developers of N1MM+ software released a new build Amongst bugfixes there is one new feature to mention. Waterfall support for the Icom IC-7300. Read more on the N1MM Logger+ Facebook page or the documentation page on the website. IC-7300 Spectrum display in N1MM+ version 1.0.6221Setup • Keep the noise level low by setting the …

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Apr 26 2017

VHF and UHF preamps

Today the preamps for 144 and 432 MHz arrived from Wimo. They are manufactured by the German SHF-Elektronik and powered via the coax-line (My Icom IC-9100 supports 12 volt over coax). Both units have a VOX unit so no need for a seperate PTT-line (for now). Now I only have to find some time to …

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Mar 27 2017

HAMNET QSY to PI1UTR

Last week we’ve reconnected the 220 meter high accesspoints in the Gerbrandy tower. Tough I’m not able to physically see the tower since it’s 31km away from my home (I can see the PI2NOS tower 16,3 km from my home) I accidentally discovered the Gerbrandy signal (PI1UTR) on HAMNET is 5 dB louder then the …

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Mar 05 2017

March 2017 VHF-and-up contest

This weekend I found a few hours to participate in the IARU Region 1 March VHF-and-up contest. I started late on Saturday due to work for HAMNET and PI6ATV in the IJsseltein Tower but managed to run for about two hours. On Sunday late in the morning I found another few hours to contest. In …

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Feb 05 2017

New rotatable tower

Today I’ve made some progress by replacing the antenna tower on the roof. It’s now rotatable. The Diamond X6000 has been replaced for the X5000 so the total length doesn’t exceed the 5 meter due to regulations to keep it license free without the need for a building permit. The 9-element LFA for 144 MHz and the …

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Dec 09 2016

HAMNET live

The HAMNET connection is live. It’s not VPN based, but radio based on 5 GHz. I’m using an Ubiquiti Nanobeam M5-400 with 40cm dish to have enough gain towards the TV tower located about 16km from my home. Line of Sight is (just) availlable which is mandatory for a 5 GHz connection. The dish needs …

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Oct 18 2016

ATV station for 5700 MHz (6cm)

The new ATV station for 6cm consists of: 23cm UniTX transmitter for 1400 MHz uplink DG0VE Frequency multiplier DG0VE amplifier: 60 mWatt > 600 mWatt Final amplifier: 150 mWatt > 14 Watt SMA coax relay to switch between TX and RX RX converter 5,7 -> 1,0 GHz with pre-amp Some sensors for temperature, fan control, …

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Aug 10 2016

Building an 13cm SSPA

With a few hams on the club we’re busy building 13cm SSPA’s. The base equipment is ex 3G/UMTS equipment. There are two models availlable for around 10 euro’s and can be found on ham flea markets. The small module has an output of about 30 Watts, the big modules output is around 90 Watts. on …

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Aug 06 2016

Hytera MD785(G) noise modification

The Hytera MD785(G) DMR transceiver works great out of the box, both analogue as digital. But there is one problem. Noise coming out of the speaker. Even when the tansceivers audio gain botton is set to zero. When the squelch opens, noise can be heard. There is no way to fix this in the firmware …

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Jul 14 2016

Welcome 13cm band SSB

Since last month I’m QRV on 2302 MHz to, with help from the LZ5HP transverter. Next is to build an SSPA based on ex 3G/UMTS equipment. The modules and 24VDC PSU is there. I only need to find the right heatsink.

Jun 29 2016

Bluestack and BlueDV: Hotspot in a box

Developments for DMR and D-Star hotspots go fast. I already owned a UHF hotspot from PE1PLM which fits on top of the Raspberry Pi. With custom firmware, this also works with MMDVM software thus DMR. A new toy is the BlueStack, developed by PE1MSZ and sold via CombiTronics.nl. Put the DVMEGA (UHF) transmitter on top of …

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