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G7CNF Station

This is the working position at G7CNF, showing the triple 1080p monitors running PowerSDR mRX for the Apache Labs ANAN-100D, Ham Radio Deluxe Logbook and WSJT-X with JT-Alert (hidden behind the html editor HI!). The laptop in the corner with another 1080p monitor is for the ANAN-10.

QSL's

Some are serious, some are funny. A few are rude! Amateurs have been exchanging cards for many, many decades. Here are mine....

PowerSDR mRX - HPSDR

PowerSDR mRX is the muscle behind the ANAN-100D's astonishing performance. Come and take a look at my experiences and observations for this stunning radio.

Transatlantc 4m QSO

In 2007, for the first time on multi-hop Es a 4m QSO was established spanning the Atlantic ocean. No such contact had been made for over 30 years (and only then on F2). Here's the story.

Loc: IO81re - WAB: ST64 (Book 19740) - CQ:14 - ITU:27 - IOTA: EU-005

get in touch

G7CNF Amateur Radio Station

Somerset Coat of ArmsThis website has been deprecated and is no longer updated. The active site has now moved to: wp.g7cnf.me.uk

Welcome to my humble website! My name is Nige (N-eye-dge: short for Nigel). I have been an amateur radio operator since the 80's. I live in Shepton Mallet, a small market town, population 9700 in central Somerset, England. I passed the Radio Amateurs' Examination after reading a loaned RSGB Radio Communication Handbook (1977 ed). I am a keen DXer and proponent of weak signal modes. Formerly a 'big gun' of 4m and 6m I have been forced to quit VHF weak signals due to untenable noise conditions which have accumulated over the last few years and which Ofcom have unlawfully refused to deal with. My station was previously biased toward meteor scatter on 4m and 6m but I now concentrate mostly on HF, enjoying VHF sporadic E when it visits!

As of the beginning of October 2013 I am now tied-in to the Noise Measuring Campaign with a CCW Sentinel Ser.No.0004. My data can be found HERE.

In recent months I have focused almost entirely on the new WSJT-X mode JT9 which, after a short time became a firm favourite. I quickly discovered that most operators run too much power and to prove this point I have almost exclusively (except for duration of GV prefix) run 10mW or less and have successfully worked all continents at 10mW, including a 10mW confirmation from VK. I have been championing JT9 as THE 'digital' mode of choice for QRPpp.

At the end of August I decided to open a public forum called interference.org.uk for sufferers of interference to have a place to discuss their problems. The forum, with sections for TV, radio and broadband interference also caters for business radio, amateur and SWL among others. This forum also brings with it the new Ofcom Spectrum Abuse Survey which is aimed at obtaining independent evidence about Ofcom's hilariously poor performance on spectrum management. The results are published HERE.

If you have invoked Ofcom to deal with an interference problem, no matter whether you are amateur, SWL, CB, business radio or even from aeronautical, military or maritime radio backgrounds, you are invited to contribute to the survey to help us better understand the regulator's cryptic decisions over the last few years. We are looking for a fair and honest representation so it does not matter whether Ofcom cured your interference or refused to investigate, as long as you have an Ofcom case reference number you can contribute and your contribution is most welcome.


Station At A Glance:

Main Radio: Apache Labs ANAN-100D 3G SDR (HPSDR) (same as new Flex-6000)
4m: ANAN-10 & ME4T-Pro Transverter (high dynamic range version)
Back-up Icom IC-7100
Backup / VHF #2 Yaesu FT-817
HT Wouxun KG818 4m FM & Baofeng UV-5R Plus (2013v) 2m & 70cm dual band
Antenna 1: End-fed vertical unterminated 'loop' - 160m - 30m
Antenna 2: HB Cobwebb 20/17/15/12/10 @ 11m
Antenna 3: Wellbrook AMA-1530S active loop (used for ANAN-100D RX2 & Diversity)
Power: Digital Modes: Dynamically adjusted for each QSO ranging from 1w to 30w (JT9 rarely above 5w). SSB 100/400w. (Often now 10mW on JT9)
Microphone: Heil PR40 on an ISK angle-poise arm
Interface: Not required for SDR - all audio remains in digital domain until the ANAN D/A.
For the Yaesu, G4ZLP isolated interface.
Amplifier: Acom 1000, just perfect for full duty modes @ UK legal 400w (rarely used now)
Other Equipment: HB GPSDO 10MHz frequency and time Standard, Heros SCR Preselector CAT, MFJ 1045C preselector (for RX2), Ameritron RCS-4XL remote 4-way antenna switch. Oak-Hills Research WM-2 QRP wattmeter.
PC1 Self-built Intel 3960k (4.2GHz) Sandy Bridge-E, 32GB 11 11 11 28, OCZ 128GB Vertex 4 x2 in RAID 0 (1000MB/s), GTX-580, GTX-275, 3x 1080p monitors, +7 inch touchscreen for ANAN-100D.
PC2 Dell E5510 i5 laptop + 1080p monitor. Runs the ANAN-10 & digi-modes.
Network Analyser DG8SAQ VNWA 1kHz – 1300MHz. ANAN-10 (Hermes) VNA.
Spectrum Analyser Signal Hound USB-SA44B 1Hz – 4GHz, ANAN 10 & 100, 0 - 60MHz
Oscilloscope Owon SDS-7102 100MHz DSO.


Events worth mentioning on the front page: 

  • 4m Propagation First G - VE (Canada, 4/6m XB due to allocation) 1st ever 4m Transatlantic on multi-hop Sporadic E
  • 4m Country First G - I (Italy)
  • 4m Country First G - DL (Germany)
  • 4m Country First G - IS0 (Sardinia)
  • 4m Country First G - OJ0 (Market Reef 4/6m XB due to allocation)
  • 4m Mode First - G - LA (Norway) The only station to work LC0VHF on CW
  • 4m Mode First - G-SV (Greece, JT6m)
  • 6m Mode First G - EA8 (Canary Islands, JT6m)
  • 6m Mode First G - KP4 (Puerto Rico, JT6m)
  • 2007 Winner of the JT6m 4m Challenge with 69 Grids
  • 2007 Runner-up of the JT6m 6m Challenge with 183 Grids (Joint 2nd with Jurek, SP9HWY)

Most Recent QSOs

 
www.hrdlog.net

 

Experimental - "ANAN-TV" See your signal in near live time (a few seconds delay) and also verify how much power I'm using ;-)


 
 

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TV & Radio Interference Help & Assistance Forum

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