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M0MTJ  |  Operating Conditions  |  Antennas / Aerials  |  /P Portable Operating  |  Accessories  |  Projects & Kits
Contact MØMTJ   |   Contact M6ORS   |  Useful Information  |  Links to Amateur Radio Sites
RSGB Ltd   |  QSL  |   The Amateur Radio Mini Site Map   |  WSPR Weak Signal Propagation Reporter
News, Developmens, Photographs and 'Bits 'n' Bobs'   |  Operating in Cyprus  |   All Latest Site Updates
Previous / Old Operating Conditions

Find me on QRZ
http://www.qrz.com/db/M0MTJ

 
IARU Grid Square IO82VO * WAB Square SO89 * CQ Zone 14 * ITU Zone 27 * 52:35:48N  2:12:16W * 125m a.s.l.

"AMATEUR RADIO  -  THE GREATEST OF ALL SCIENTIFIC HOBBIES"  I.A.R.U
“There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.”
- Albert Einstein


MØMTJ - Operating Conditions


November 2017 Update:

After a break from amateur radio for a year or two, I decided to return to the hobby, but this time in a much more limited way. I think that previously I had become too enthusiastic and had too much equipment, and perhaps unnecessarily expensive and sophisticated equipment - so I was devastated when the radio interference from neighbours electronic equipment such as solar panel inverters, switch mode power supplies and chargers, led lighting, and much more swamped the bands with an electronic fog of noise pollution - "QRM".

M0MTJ Operating Position November 2017I once again set up a small operating area in the smallest bedroom consisting of a writing desk, topped with some home-made shelving built to size. Behind that is a compact bookcase from Argos to store books and small boxes of electronic parts and radio related items.

The writing desk houses the various radio equipment and provides a comfortable and convenient operating area with the microphones mounted on a boom arm for hands free operation.

Fun Fun Fun  :  Now, with the new and down-sized 'radio shack', I have had just as much fun with the new Yaesu FT-891 as I ever did with previous and vastly more expensive equipment!  Part of that fun is, perhaps, the continued amazement that the Yaesu FT-891 is so good! Who needs to spend over £1200.00 or more to simply have fun!


Bands, Modes and Radios : 
In August 2017 I obtained Yaesu FTM-100D for use at home on 2 Metres and 70centimetres FM connected to my home-brew Dual Band coaxial end-fed dipole ("Flowerpot Antenna"). It works very well. I also put the Yaesu FT-7900 back into the car for when I'm out and about, using a tiny little "Micro-Mag" dual band aerial on the roof. Yaesu FTM-100D which also has the capability to operate C4FM/Yaesu Fusion.

In October 2017 I returned to HF SSB;  After much reading and research, I obtained a Yaesu FT-891 multi mode HF +6m transceiver. It's pointless spending many hundreds, or thousands of pounds on a transceiver when your local QRM and noise-floor is so high, so I wanted something that would not break the bank and the Yaesu FT-891 represents fantastic value for money . As it turns out, the Yaesu FT-891 is a superb radio for relatively small amount of money it cost!  Apart from SSB rag-chew, I hope to do some more with WSPR in the future, it's an interesting aerial and propagation tool.


I am not interested in voice over Internet / D-Star / DMR as this, for me, is not radio - it's just a voice call over the internet - why bother with a radio!   I do, however, like the Yaesu FTM-100D as it has very good FM performance and I don't mind making simplex contacts with Fusion or using the local Fusion repeater for local two way contacts.  But DMR / D-Star VOIP and all that?....not really for me. I want to use proper radio waves, propagation and the ionosphere - not make a 'telephone call'.

It was in July 2017 that I started off considering a choice of HF transceivers. However, as mentioned, at the home QTH there is a high level of QRM on all bands. The RSGB's attitude to these problems is to just shrug their metaphorical shoulders (their suggestion was to 'do something else' - build a kit or something....really nice) and the supposed regulator OFCOM simply do not want to know about silly radio amateurs.  I therefore did not want to potentially waste hundreds of pounds on an expensive radio, but needed something cheap but that had reasonably good QRM fighting ability and effective noise reduction; I took the cheapest new option I could find with a Yaesu FT-891. So that's the H.F. radio that I have and it's really great, especially for such a small radio!


Microphones :
My preference is to operate hands-free, so I use separate, dedicated, microphones with the Yaesu FT-891 and the Yaesu FTM-100D, as described below:
FT891 : I use a Beyerdynamic TG-V35ds dynamic vocal microphone (similar to a Shure SM-58) mounted on a boom arm for convenient operation of the Yaesu FT-891. The microphone gets good reports.  PTT is achieved by a foot switch.
I have also previously experimented with an old Radio Shack / Tandy Optimus 33-7058 unidirectional dynamic microphone which works well too. I have more information about microphones here >
FTM-100D : I use an electret condenser microphone, mounted on the same boom arm as the Beyerdynamic microphone. It is connected to the rig with one of my home brew electret microphone interface units. PTT is with a home brew locking and momentary switch on the desk.
FT-7900 : For hands-free mobile use in the car I use an electret condenser microphone, mounted on an a short arm near the grab handle connected to the rig with another one of my home brew electret microphone interface units.  PTT is with a home brew locking and momentary switch located in the centre console of the car.


2m/70cm Aerials
: 2m & 70cms FM are taken care of by my home-brew end fed half wave dipole (CFR - Controlled Feeder Radiation Antenna "flowerpot antenna"). This dual band vertical aerial is mounted on a 10 foot aluminium pole mounted near the apex of the house. The feedpoint is approximately 11 meters above ground level. It cost me about £6.00 to make and works better than an expensive, commercial 'white stick' antenna that I had previously and cost only a tenth of the price!

I also have a couple of roll-up Wireman dual band 'Slim Jim' J-Pole aerials for 2m and 70cm. One is hanging in the loft as a back up and one is ready for portable use if required. These handy aerials are available from N9TAX at ebay and http://www.2wayelectronix.com/

For mobile with the Yaesu FT-7900, I use a tiny "Micro-Mag" dual band 2m/70cms aerial on the roof of the car.


H.F. Aerials : 
I have very limited space and also aim for as low a profile as possible (stealth) - so these days my aerials consist of  the following:

[1] End Fed Half Wave wire 20 metres long to cover 40m to 10m using a GWhip high impedance matching transformer (ratio approx 42:1 I estimate). It is installed in an inverted L configuration. 

[2] A Sloping 15 metre long wire, parallel with a second wire of approximately 10 metres in length, fed with GWhip 9:1 UnUn.  

[3] A home-brew Fan Dipole for 6m and 10m strung up on the loft, made from some cheap PVC covered wire.

[4] I am experimenting with a 'home-brew' coaxial dipole for the 6metre / 50MHz band.

[5] I also hope to experiment with a Doublet aerial; This time it will be a 3/8th wavelength for the 40 m band, so about 16 meters total span, perhaps adding a fan dipole element for other specific bands. To be fed with 300 Ohm 'ladder line' and a 1:1 current balun.... but that's for the future.

A Doublet Aerial can be a very good multi-band aerial.  Other potential aerials for experimentation might be a half size G5RV and a Off Centre Fed Dipole.  Read more about Doublet aerials here


Other H.F. Aerials :

I may also use a 7.2 metre high "UnTenna" supported by a fibreglass fishing pole using a G Whip 9:1 UnUn or a GWhip End Fed Zepp. I have also used both a ground plane antenna, again supported by the fibreglass fishing pole, cut for the 20 metre band and a trapped dipole for 20 and 10 metres fed by 75 ohm twin feeder and 1:1 balun to the ATU, both with good results.

Wire J-Pole:  I made a simple wire J-Pole antenna from 450 ohm Wireman ladder line and a length of insulated wire. This was to a design by DK7ZB. I can support it on a push up 10 metre fibreglass fishing pole so that it can be put up as and when required. I will also use it as a 'Sloper' with the far end supported by paracord attached on a pole at the apex of the house. It's simple, cheap, effective and relatively stealthy as it can be hidden away when it's not in use. Previously, I have also made wire J-Pole antennas for 6 metres, 4 metres and 2 metres which work extremely well.

More about antennas here >

M0MTJ Operating Position November 2017
M0MTJ Operating Position November 2017

M0MTJ Operating Position November 2017
M0MTJ Operating Position November 2017

Computer Data Interfaces: Although I have never taken to digital modes, I do have a G4ZLP / ZLP Electronics Data-Link external USB sound card that links the Yaesu FT891 transceiver to a Windows Laptop which would allow the use of data modes such as JT65, FT8, RTTY, PSK31, SSTV and Packet. However, I only use it for WSPR, which I do find interesting.
 

Previous / Old Operating Conditions

Originally my 'shack' was located in the guest bedroom, but in 2011 it was moved and re-established in the much smaller box room so that the spare bedroom could be used as a proper guest room again without all my associated electronic clutter!

I now share the 'box room' with a wardrobe. Initially I squeezed into a space that I called "Ronnie Corbett's Corner" (shown Previous / Old Operating Conditions page), but I have now re-organised several times since then, gradually expanding, then contracting considerably in 2017 - as shown above.


Radio Shack / Tandy Optimus 33-7058
                                unidirectional dynamic microphone and
                                homebrew adapter cable
Tandy Optimus 33-7058 unidirectional dynamic microphone and home-brew adapter cable
I now use Beyerdynamic TG-V35ds microphones  -  more here >




2 Metres and 70 Centimetres Area From MØMTJ Home QTH

The predicted plots are produced assuming these factors:

2m and 70cm with 5 & 50 Watt transmitter power plots; An antenna system with no gain and an
antenna height of 7 metres a.g.l.

In both cases RX antenna system is assumed to have 0dB overall gain/loss and also positioned at a height of 7 metres a.g.l.

The plots are only very broad predictions - the actual area could vary considerably due to different RX antenna height, gain, feeder losses and other variable or unpredictable local conditions. Additionally most S meters are very accurate and may only provide a very rough  comparative representation of signal strength. Each S point gradation may be significantly different to the recognized 6dB interval, perhaps only representing 2, 3 or 4 dB gradations.


2 Metres : 144 - 146MHz:

50 Watts - 2 Metres:

50 Watts : 2 metre / 144
                                MHz predicted area plot - radio coverage
                                map
2 metres / 144 MHz predicted area plot from M0MTJ home QTH  -  50 Watts  -  75km map

50 Watts : 2 metre / 144 MHz
                              predicted area plot - radio coverage map
2 metres / 144 MHz predicted area plot from M0MTJ home QTH  -  50 Watts  -  175km map



5 Watts - 2 Metres:

5
                              Watts : 2 metre / 144 MHz predicted area
                              plot - radio coverage map
5 Watts :   2 metres / 144 MHz predicted area plot from M0MTJ home QTH  -  75km map

5 Watts : 2 metre / 144 MHz predicted
                              area plot - radio coverage map
5 Watts :   2 metres / 144 MHz predicted area plot from M0MTJ home QTH  -  175km map




70 Centemetres : 430 - 440 MHz:

70cms / 430MHz predicted area plot -
                              radio coverage map
70 Centimetres / 430MHz predicted area plot from M0MTJ home QTH  -  50 Watts  -  75km map

M0MTJ pixel plot
70 Centimetres / 430MHz predicted area plot from M0MTJ home QTH  -  50 Watts  -  175km map


M0MTJ pixel plot 70cms 5
                            watts
70 Centimetres / 430MHz predicted area plot from M0MTJ home QTH  -  5 Watts  -  75km map

M0MTJ pixel plot 70cms 5 watts
70 Centimetres / 430MHz predicted area plot from M0MTJ home QTH  -  5 Watts  -  175km map


MØMTJ  :  IARU Grid Square IO82VO  *  WAB Square SO89  *  CQ Zone 14  *  ITU Zone 27  *  52:35:48N  2:12:16W  *  125m a.s.l.




Simon's Cat - the funniest,
                              naughtiest cat!


M0MTJ in the shed - August 2012
Smile, you're on candid camera. M0MTJ in the shed - August 2012


 

British Amateur Radio Station M0MTJ
Previous / Old Operating Conditions

73
Mike
MØMTJ
M0MTJ Contact
                              Page

QSL

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                          Licence!

        

The Station of Fred George VE2BV - c. 1936


Fred George VE2BV

This is Frederick George, my stepmother's father, at the controls of his amateur radio station. His call sign was VE2BV and was located in Quebec, Canada. This photograph was taken some time in 1936. Fred was a radio engineer at RCA in Montreal, as the lower photograph shows. His experience at RCA no doubt enabled him to establish an excellent station.

Fred George VE2BV

The photograph above shows a closer view of the station; headphones, morse key, transmitting and receiving equipment, clock and what looks like the battery power source under the table. The 'ladder line' going to the antenna can also be seen.

RCA Victor Montreal
The last photograph shows Fred George (VE2BV) at work as the radio engineer at the RCA company in Montreal, Canada.

VE2BV is recorded by the ARRL's QST magazine as 'silent key' in November 1948.

Callsign update 2011: The call letters VE2BV have been reissued to Mario Boisvert of Deux Montagnes, Quebec, Canada.


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THE RADIO AMATEUR IS....        

CONSIDERATE... never knowingly operates in such a way as to lessen the pleasure of others.         

LOYAL... offers loyalty, encouragement and support to other amateurs, local clubs and the American Radio Relay League, through which Amateur Radio in the United States is represented nationally and internationally.         

PROGRESSIVE... with knowledge abreast of science, a well-built and efficient station and operation above reproach.         

FRIENDLY... slow and patient operating when requested; friendly advice and counsel to the beginner; kindly assistance, cooperation and consideration for the interests of others. These are the hallmarks of the amateur spirit.         

BALANCED... radio is an avocation, never interfering with duties owed to family, job, school, or community.  

PATRIOTIC... station and skill always ready for service to country and community.

By Paul M. Segal W9EEA (1928)




THE AMATEUR RADIO CODE OF CONDUCT    http://dx-code.org

I will listen and listen, and then listen again before calling.

I will only call if I can copy the DX station properly.

I will not trust the DX cluster and will be sure of the DX station's call sign before calling.

I will not interfere with the DX station nor anyone calling and will never tune up on the DX frequency or in the QSX slot.

I will wait for the DX station to end a contact before I call.

I will always send my full call sign.

I will call and then listen for a reasonable interval. I will not call continuously.

I will not transmit when the DX operator calls another call sign, not mine.

I will not transmit when the DX operator queries a call sign not like mine.

I will not transmit when the DX station requests geographic areas other than mine.

When the DX operator calls me, I will not repeat my call sign unless I think he has copied it incorrectly.

I will be thankful if and when I do make a contact.

I will respect my fellow hams and conduct myself so as to earn their respect.


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UK Amateur Radio Station M0MTJ is a
                          Simon's Cat fan !
M0MTJ Contact Page

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Mike Smith - MDS975.co.uk © 2003 - 2018




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M0MTJ
Subjects covered on this page:
Amateur Radio; Ham Radio; Radio; Transceivers; HF; VHF; UHF; Data Modes; Morse Code; RTTY; PSK31; SSTV; FSTV; Amtor; Sitor
Antennas; Aerials; Cable; Coaxial Cable; Twin Lead; Masts; Poles; Propagation; Computer; PC; USB Computer Interface; Microphone
Loudspeaker; Filters; Noise Reuction; DSP; Digital Signal Processing; Morse Key; SWR ; Inverted L; Inverted V; Dipole; Doublet.