GW0KIG's radio blog
A blog mainly about my favourite hobby-amateur radio, shortwave listening and radio in its many forms.
Friday 28 August 2020
Friday 24 May 2019
160 metres
160 metres isn't really a band I have ever done much operation on. When I was first licensed I suppose I had the space for a decent 160m antenna but wasn't really interested in that band. These days space and local noise are the main problems. Having recently rediscovered WSPR I thought I would try 160 again.
Whilst my Drake MN4C tuner will tune my G5RV antenna OK, an evening on WSPR showed that the antenna was pretty useless on that band with nothing heard and nobody hearing me. In any case reception was all but impossible with S9+ of noise on the WSPR frequency.
Plan B was to insert a ground rod outside the shack (easy enough as my shack is on the ground floor) and strap the two sides of the G5RV together and tuning it against ground. The noise I experience on 160 at the moment is pretty bad, S9+ so receive is difficult. I did however manage to get my 10w WSPR signal out as can be seen below
Additionally I managed to receive two German stations and one Swiss. I will experiment again with WSPR on 160, tonight I closed down just as darkness was closing in, a later session may enable some more distant reports. I would be happier running a maximum of 5 watts on this mode so will reduce power in future.
So it seems it was worth hammering in that ground rod.................now if only I could trace the source of the noise.
Whilst my Drake MN4C tuner will tune my G5RV antenna OK, an evening on WSPR showed that the antenna was pretty useless on that band with nothing heard and nobody hearing me. In any case reception was all but impossible with S9+ of noise on the WSPR frequency.
Plan B was to insert a ground rod outside the shack (easy enough as my shack is on the ground floor) and strap the two sides of the G5RV together and tuning it against ground. The noise I experience on 160 at the moment is pretty bad, S9+ so receive is difficult. I did however manage to get my 10w WSPR signal out as can be seen below
Additionally I managed to receive two German stations and one Swiss. I will experiment again with WSPR on 160, tonight I closed down just as darkness was closing in, a later session may enable some more distant reports. I would be happier running a maximum of 5 watts on this mode so will reduce power in future.
So it seems it was worth hammering in that ground rod.................now if only I could trace the source of the noise.
Wednesday 22 May 2019
6 Metres
When I first moved to this location, just over three years ago one of the first antennas I put up was a tri band 6/2/70cms vertical. I found it to be rather noisy on 6 metres and since I could only hear one 6 metre FM repeater, very noisily and there wasn't much else going on 50 mhz I took it down.
I replaced it with a dualband X30 vertical which being smaller I managed to get up higher in the air. The X30 works very well, as well as an antenna can work in this very poor VHF/UHF location in the bottom of a valley.
A couple of weeks back, when there was a sporadic E opening on 10 I found myself wondering whether 6 metres would be open too. I renmebered that I had a 6 metre dipole lying in my shed, one had had successfully used loft mounted in a previous location.
Today I dug it out, connected it to some spare RG8X cable I had and put it up outside. Its less than 5metres up at the moment but should work OK if the band opens.
Since my main HF rig, the FT10000MP doesn't cover 6 I have put the Icom 7000 back on the operating desk for this band.
Lets hope I haven't missed all the SP E openings this year!!!
I replaced it with a dualband X30 vertical which being smaller I managed to get up higher in the air. The X30 works very well, as well as an antenna can work in this very poor VHF/UHF location in the bottom of a valley.
A couple of weeks back, when there was a sporadic E opening on 10 I found myself wondering whether 6 metres would be open too. I renmebered that I had a 6 metre dipole lying in my shed, one had had successfully used loft mounted in a previous location.
Today I dug it out, connected it to some spare RG8X cable I had and put it up outside. Its less than 5metres up at the moment but should work OK if the band opens.
Since my main HF rig, the FT10000MP doesn't cover 6 I have put the Icom 7000 back on the operating desk for this band.
Lets hope I haven't missed all the SP E openings this year!!!
Radio on the cheap?
Despite the old saying "you get what you pay for" I have been pleasantly surprised with the handheld pictured above. Its a Baofeng DM-860 dual band VHF/UHF FM and DMR handheld.
Form factor is almost identical to the more expensive Radiodditty GD-77, in fact the batteries and chargers are interchangable between the two radios.although the programming lead and CPS software is different.
I have had this radio for a couple of months now and it has become my daily use handie. I have had good audio reports from it on both DMR and FM. Probably the best radio I have seen from Baofeng to date. It's not perfect obviously, the receiver on FM is not as good as my Icom ID51 for example but real world tests (i.e. using the radio) show it to be superior to both the Baofeng UV5R and RD5R.
At a price (direct from China) of just over £40 though it is hard to beat, particularly as it allows a degree of programming from the front panel which is not something all DMR radios allow.
Wednesday 24 January 2018
really not real radio!
Just over two years ago I purchased an Icom ID-51 Dual Band
handheld radio. What was unusual for me about this radio was that it had D Star
Capability. This was a mode that had never interested me in the past after all
it wasn’t real radio as it depended on repeaters and or internet links to work.
However, at that time I was about to move house, had dismantled the shack and
taken down my antennas so I thought it would give me some radio interest to
occupy my time.
Two years on I still have the Dstar gear, have set up a
personal D star private node so I can work within a few Kms distance from my
shack when I am portable or mobile and using Dstar has also introduced me to
the delights of the Raspberry PI mini computer which I use with my node.
I have also obtained a DMR handheld, DMR equipment generally
is much cheaper than Dstar or the Yaesu digital mode Fusion. The problem with
DMR as it of course is a commercial mode and was never really designed for the
amateur market. Programming DMR rigs is a real nightmare (for me at least) but
I am learning.
I am also lucky enough to know a very generous amateur in our
local radio club that has loaned me a Yaesu Fusion Rig to try. So now I have
all three of the digital modes to hand.
Three modes, three radios- Icom ID 51-Dstar, Radioddity GD-77 DMR and Yaesu FT1D Fusion.
One thing all of these modes have in common is that they
rely heavily on the internet. Yes of course you could have simplex QSOs in any
of the three -Dstar, DMR or Fusion but generally this is not how these modes
are used. Most people are either working through a repeater or a personal node
or hotspot all of which use the internet as its backbone.
The three modes are incompatible and at present there are no
transceivers that operate more than one of these modes. So, if you want all
three you need three rigs! This also has the effect of diluting activity, as
some are on one mode, others on another.
Activity wise my Experience is DMR is marginally the most
active, followed by Dstar and lastly Fusion.
Whilst as I have written before it is fun to have Crystal
clear worldwide contacts from an armchair using a low power handheld it doesn’t
have the same magic as working HF or even FM on VHF. These days VHF 2 metres is
all but dead in this area, maybe these digital modes are to blame who knows?
But using these digital modes tied into the internet I suppose is no more magic
than a telephone call! That said I do use these modes from time to time. Who can deny how useful these systems would be
for someone who cannot put up antennas of any description but still wants to
keep in touch with other amateurs? The problem I believe is that there are
newly licenced amateurs who will never progress beyond their DMR handie and
experience the fun of the HF bands simply because its so easy!
Drake R8B- an old friend revisited (almost)
Back around 15 years ago or so I bought a Drake R8A
receiver. It was the first real top- flight receiver I had owned and I remember
being very impressed with it. I even used it with some PC software which back
then was quite a novelty being able to tune a radio using the PC. Eventually I
sold this receiver, I can’t remember why now but it was probably to fund some
new shack equipment. I regretted selling it soon enough but these receivers
seem fairly rare in the UK so I never managed to pick up another.
Although I have held an amateur radio licence for over 30
years and am active on the bands from time to time I have always been an SWL at
heart and always have a few dedicated receivers in the shack. In recent years I
have had receivers which were top of the range in their day. I still have an
Icom R70 and a Kenwood R5000 here, both still very good performers.
Just before Christmas however I spotted a Drake R8B on Ebay.
It was advertised as having a fault. That fault was that on switch on the radio
showed “PWRLOS” on the display. This is in fact not a fault, it simply means
that the receiver had been unplugged from the mains supply, the internal clock
has lost the time and needs resetting. If this was the only fault then there
should be no problems.
I took a gamble and bid and won the receiver. It didn’t sell
at a particularly cheap price but then again it sold for lower than I would
expect, no doubt due to the advertised “Fault”.
Well the receiver duly arrived and on unboxing it I found I
was lucky. Resetting the clock fixed things and I had an operating R8B. A quick
wipe with a cloth and a little polish and the receiver seemed in good
condition.
Well how does it compare to the other receivers I have? One
thing I had forgotten from my old days of Drake ownership. It dwarfs the R5000
and is substantially bigger than the Icom R70.
Build quality is not as good as either rig. It seems more flimsy than the R5000 and the R70 which is built like a tank! The Drake has a very light feeling VFO knob too!
Build quality is not as good as either rig. It seems more flimsy than the R5000 and the R70 which is built like a tank! The Drake has a very light feeling VFO knob too!
This may sound like I am disappointed with this set, but
actually I am not. The audio quality on the R8A once you plug in an external
speaker is superb. It has a good range of IF filters 6,4,2.3,1.8 and 0.5khz,
effective passband tuning and notch filter and synchronous AM detection. It would be ideal for a Medium Wave Dxer as it
has good sensitivity through the band. I also find the numeric keypad ideal for
navigating the bands just by punching in a frequecncy.It is also controllable
via a PC although getting suitable software for it these days will be a
challenge.
Saturday 25 November 2017
Unusual Receiver
I picked up this receiver at a local radio rally a few weeks back. It is an RX80. It was made from a kit Featured in the RSGB magazine "Radcom" in 1981. It is amateur bands only but since it has a digital frequency readout I suppose it was quite advanced for its time. I have never seen one before and as you can see below this is a working example although the WARC bands (10 18 and 24 mhz )dont seem to function.
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