Since getting my Icom IC-705 I’ve had a constant issue with interference on the HF bands from the USB connection on the radio when the AH-705 remote auto ATU is connected.
If I use the radio without the AH-705 inline there is no issue at all but, as soon as the AH-705 is connected to the radio there is some 9 S points of computer data noise across all the HF bands rendering them unusable.
Reading online this appears to be a common issue and so I set about trying to find a resolution.
The noise is most likely being induced onto the outer braid of the screen on the cables and so I decided to look into making a common mode choke.
Visiting the HAM Goodies website I ordered a couple of FT240-31 Ferrite Toroids as I’d read this particular mix is ideal for making common mode chokes.
USB Cable wrapped around a FT240-31 Ferrite Toroid to create a choke
I wrapped a long USB cable around the toroid and used some tape to hold the cable in place, it’s surprising how much length is lost by simply wrapping around what looks like a very small toroid.
Firing up the radio the noise was reduced considerably but, it was still there and so I decided to do the same to the coaxial cable between the AH-705 and the IC-705.
Coaxial cable between AH-705 and IC-705 wrapped around a FT240-31 Ferrite Toroid
Once I’d wrapped the coax around the toroid and reconnected the coax between the radio and ATU I was pleased to see that the computer data noise was now gone on all bands except for the 10m band. For some reason the 10m band interference is still as strong as it was without the toroids in place.
I’m not too sure why this is. I tried more and less turns on the toroid to no avail and so eventually I decided to just live with it for the time being.
At least now I can use 160m -> 12m without any interference whatsoever, a massive improvement on what I had before.
I need to do some more research on the different mixes of the ferrite toroids and perhaps trying a different mix will resolve the problem on the 10m band too.
Since purchasing my Begali Pearl twin paddle morse key I’ve been looking to get another Begali for my IC-705 portable setup. Going portable means I need a key that isn’t super shiny like the Pearl, something a little more hardy would be ideal.
I was looking to buy the Begali Simplex Basic directly from Begali as it would be ideal for portable operations however, my lovely wife spotted another Begali key for sale on Ebay and pinged the details over to me to take a look at.
Begali Traveler Light
To my surprise the key for sale on Ebay was a Begali Traveler Light, the perfect key for portable use and at a much lower price than new.
I contacted the seller immediately asking a couple of questions about the key and got an immediate response, always a good sign!
It turned out that the key was being sold by Wallace, MM0AMV up in Scotland. Looking at his QRZ page it’s clear he’s an avid CW fan as he has two Begali keys. This was backed up by the conversation we had via Ebay messaging.
In no time at all I had paid the £170.00 including postage and was the owner of my second Begali morse key.
My Begali Traveler Light Morse Key #904
The key was in as new condition as described by Wallace, clearly it had been looked after well.
It didn’t take long for me to get it hooked up to my IC-705 and on air. After a little adjustment of the gap and return tension I had the key setup comfortably for my weird left-handed use.
The key isn’t anywhere as near as heavy as my Begali Pearl key but, it’s plenty heavy enough to stop it moving around when in use. This is of course is helped by the two fold out legs that stabilise the key firmly during use but, protect the paddles solidly when in transit. It’s a great design and a very unique approach to making a fairly light but, solid twin paddle for portable usage.
In the garden with my Begali Traveler Light and IC-705 connected to my EFHW Vertical for 20m
Once folded the key takes very little space in the IC-705 portable case and completes the setup nicely. IC-705 radio, AH-705 remote auto ATU, Begali Traveler Light, tripod and a few interconnect cables, the perfect portable station.
IC-705 Portable station case with plenty of space for future additions
Since purchasing the IC-705 I’ve found that I’ve hardly used my Yaesu FTDX10, which is strange considering the receiver, filtering, DSP and APF combination is considerably better on the FTDX10 than it is on the IC-705. The IC-705 has a much nicer, easier to use user interface and it’s just a lot of fun to use even though it’s only a QRP rig. I can see me having many happy hours on air with this QRP station.
After my disappointment with the Vine RST-TP1 twin paddle that I bought and subsequently returned to Martin Lynch and Sons due to the poor build quality and finish I continued my hunt for a morse key.
During my conversation with Tony, the sales manager at ML&S one thing he did say to me was that if I was really serious about morse code then there really was only one key to buy these days, a Begali from Italy.
Morse Code has always been my main mode ever since I passed my 12wpm morse test and obtained my M0AWS A class licence, it’s a mode I dearly love and get a huge amount of pleasure from. (It also helps to keep the little grey cells alive in retirement!)
So without delay I googled the Begali website and started looking at their offerings.
Begali do a fine range of twin paddle keys starting from €131.00 +VAT and shipping right up to almost €700+VAT and shipping, far more than I wanted to spend.
Having spent almost £180.00 inc VAT and shipping for the Vine RST-TP1 and being extremely disappointed with it I decided to spend a little more to ensure I bought something of quality that was going to last.
My Begali Pearl with Palladium base, gold top and red paddles, a thing of beauty
A couple of weeks after ordering the key arrived hassle free, a miracle considering the hassle Brexit has caused with import and export of goods between the U.K. and Europe.
Bruna at Begali assured me that they had a system in place that takes care of all the import taxes etc and that the delivery process would be smooth and trouble free, and indeed it was!
Upon opening the box I was taken by the sheer beauty of the key, beautifully finished, perfectly put together and well engineered. I knew this was going to be a pleasure to use before I’d even touched the paddles!
My Begali Pearl Twin Paddle Morse Key
Being left handed I’ve had to setup both my Yaesu FTDX10 and Icom IC-705 such that the dit and dah are reversed on the paddles but, once done I felt at home with the key very quickly.
Having been out of the hobby for some 15 years my morse is a little rusty so I set about doing a fair bit of listening before trying to work stations. To my surprise I was soon decoding stations at 20wpm in my head albeit with a little more thought than it used to take but, accurate enough to have a go at working a few stations.
Working CW stations on 20m with the Begali Pearl Twin Paddle and Icom IC-705
Using the key is pure delight, it’s light to the touch, responsive, infinitely adjustable, comfortable and a joy to use. I knew right away that I had made the right decision.
At 1.7kg it’s a heavy key which ensures it doesn’t move around the desk no matter how hard you lean on it. I find the key really relaxing to use as it only needs a gentle touch to bring the contacts together. Adjustment is super accurate thanks to the very fine threaded adjuster screws that have been beautifully machined.
It’s clear from the moment you get a Begali Pearl out of the box that it has been made with care and pride, something that is a rarity today.
Laser engraving on the Begali Pearl Twin Paddle Morse Key
I’ve decided that this key is going to be my main station key and will spend most of it’s life connected to my Yaesu FTDX10 radio, that means I need another key to go into my portable case with my IC-705. I’ve already made the decision what it’s going to be, of course it’ll be another Begali, the Simplex Basic Twin Paddle.
I spent some time this morning in the garden with the Icom IC-705/AH-705 combo connected to my End Fed Half Wave (EFHW) vertical for the 30m band. This is a great antenna that works superbly on the 30m band. Being a resonant half wave fed via a 49:1 Unun it doesn’t require any ATU inline normally and so it’s quick and easy to use with any radio.
Today I decided to disconnect and remove the 49:1 Unun and hook up the Icom AH-705 instead. I thought it would be an interesting exercise to see how well it handled the EFHW vertical on both 30m and the other bands.
Icom AH-705 connected to the 30m Band EFHW Vertical Antenna
I purchased a couple of 5m leads for the AH-705 so that I could setup the radio on the picnic table in the garden and be a comfortable distance from the antenna. They worked great and allow me to use the radio in the spring/summer sun with ease.
Icom IC-705 setup on the picnic table in the garden
The little AH-705 remote auto ATU really does work well with the IC-705. Each time you change bands all you have to do is give a quick press of the PTT on the mic and it automagically goes into tune mode and matches the antenna to the 50 Ohm radio in seconds.
I was was really pleased to see that the AH-705 ATU matched the EFHW Vertical for 30m on the 80m, 60m, 40m, 30m and 20m bands with a perfect 1:1 SWR. With the antenna consisting of 14.81m of wire this makes it somewhat short of a 1/4 wave on the 80m band and I’m not too sure how well it will work. On the 40m band it is a 3/8 wave antenna so should work well. It’s a 1/4 wave on the 60m band and of course a half wave on 30m band as per it’s original design. On the 20m band it is just under 3/4 wavelength long so hopefully should work reasonably well. Of course it won’t be as good as my 20m band EFHW Vertical that has a much lower angle of radiation but, will make an interesting comparison.
The antenna also tunes up nicely on all the other higher bands including the WARC bands. On 17m it is getting close to a full wave length and on 15m it is just over a full wavelength and so should work fairly well on these two bands albeit with a higher than optimal angle of maximum radiation.
On the 12m band it is 1.25 wavelengths long and of course on the 10m band it is almost 1.5 wavelengths long. I’m not sure how well it is going to work on these two higher bands but, for a 14.81m long piece of wire it certainly gives me a good chance on a wide spectrum of frequencies.
30m Band EFHW Vertical Antenna in the breeze
The bands weren’t in particularly good shape this morning but, I found some SSB signals on the 20m band and so decided to see if I could make some contacts.
First contact was with S51DX in Slovenia. He was using 1kw into a 5 element beam pointed pretty much directly at me. The little IC-705 S meter took a pounding with him peaking +30db over S9 most of the time. I was really pleased to get a 5/9 report from him using just 5w from the IC-705 on the standard 7v battery. Of course his station was doing all the work but, it’s good to take advantage of these big stations when running QRP power levels.
Next I had a QSO with John, EA7JUR in Almeria Spain. But this time the battery on the IC-705 was pretty much exhausted and so I hooked it up to the 12v supply to get it charging whilst I was on air. This of course gave me the ability to increase my O/P power by 100% to a massive 10w!
I wasn’t so strong at John’s end, only getting 5/5 report at best whilst he was 5/5-5/9 with me with some QSB. John was using a mini beam antenna again pointed towards me so once again all the work was being done at his end. We had a good chat for a number of minutes until it was time for lunch.
Listening on the 40m band I did hear a very interesting station, KN6IPA/Aeronautical-Mobile. Justin, KN6IPA is part of the crew on a USAF KC135 air-to-air refuelling tanker that flies out of RAF Lakenheath in the U.K. He was transmitting from the aircraft whilst in flight over Germany. His signal was between 5/9 and 5/9+20dB on my vertical antenna and had a massive pileup of people calling him from all over Europe.
I did try calling him with my punchy 10w of power but, couldn’t compete with the huge pileup of very loud, powerful stations all incessantly calling. It was really interesting to just sit back and listen to Justin’s information. He was using 300w into a wire antenna that runs from the fuselage to the vertical stabiliser. Of course being so high up he had a massive advantage and could be heard for hundreds of miles with ease, hence every one and their dog was calling him.
Photo of the KC135 tanker that KN6IPA was transmitting from courtesy of his QRZ.COM page
If you look closely at the photo above of the KC135 that Justin is a crew member on you can just make out the wire antenna on the vertical stabiliser.
I have to admit that I would love to spend a few hours on the radio aboard the KC135 whilst it was flying around, just imagine the DX you could work!
My IC-705 and AH-705 arrived today from ML&S, I wasted no time getting it hooked up to an antenna and started working my way through the manual getting to know the menu system.
After a few hours tinkering I piped up on 20m SSB and worked a couple of stations with ease using 10w. No problems getting through and to my surprise got a 5/9 report from both stations.
Later in the evening I decided to give it a go on 20m FT8 using just 5w O/P using the battery on the back of the radio that was now fully charged. It’s interesting to note that I didn’t need any drivers on my MacBook Pro to use the CAT and Audio via USB on the IC-705. It was simply plug and go. Much easier than it was with the FTDX10.
There was a fair amount of DX about on 20m including a few stations from Australia and Japan. I never managed to get a response back from either but, PSKReporter was showing that I was heard!
PSKReporter showing M0AWS being heard by BG7BDB
I also noticed that a station in China was hearing me too. BG7BDB in LinXiang City reported hearing me at -17dB. I quickly hunted around the waterfall and found him and gave a call.
To my amazement he came straight back to me and we exchanged SNR reports, 73 and he was in the log.
WSJT-X FT8 contact with BG7BDB
Looking at my WSJT-X log the distance to BG7BDB is 5467 Miles, at 5w O/P that equates to 0.91mW/Mile!
FT8 really is an impressive mode, it allows QRP stations to work the DX that just wouldn’t be possible on SSB. I have to say I’m really impressed with the Icom IC-705. The receiver and filtering isn’t as good as my Yaesu FTDX10 but, it’s an impressive little package. Portable operations with this radio is going to be a lot of fun!
Since purchasing the Yaesu FTDX10 and getting some wire into the air I’ve been working DX all over the world with ease. So far I’ve not exceeded 25w total output and yet I’ve worked as far as Australia, South America and West Coast USA and Canada. I’m often found to be using far less than 25w, even 5w on the 60m band is a huge amount of fun!
The FTDX10 has an incredible receiver, the best I have ever owned, for the money it really is an amazing bit of kit. The only thing about it that doesn’t work for me is the size when trying to go portable. It’s just a tad too big and requires a huge battery to power it. I love everything else about the FTDX10 apart from this one thing.
So, with the FTDX10 now being the prime shack radio I decided to look into a solution for portable operations. There are many options available today from the cheap Chinese made radios to the old reliable FT817/818 (which I used to own and had a lot of fun with) through to a multitude of newer, more modern full functionality radios. We are truly spoilt for choice these days!
One radio I have read a lot about is the Icom IC-705, it’s an incredibly feature packed little radio with a max output of 10w that covers 160m all the way up to 70cms. With its large super clear colour touch screen and easy swap battery solution it ticks all the boxes.
Icom IC-705 Portable HF/VHF/UHF Transceiver
One thing many people complain about is the fact that the IC-705 doesn’t have a built in ATU. This has never bothered me as I am a firm believer that the ATU should be at the antenna and not in the radio at the end of a long coax run. Running various antenna models on my EzNEC software has shown that keeping the ATU at the antenna is by far the best solution.
Of course Icom have this covered with their AH-705 remote auto ATU that’s specifically designed to compliment the IC-705. Powered by just two AA batteries and utilising latching relays the unit is both very quick to tune and uses next to no power at all, ideal for those Parks on the Air (POTA) or in my case, Beaches on the Air (BOTA) activations.
Being a quality Icom product the AH-705 isn’t cheap, at £299.99 it’s actually one of the most expensive auto ATUs available for the IC-705.
Icom AH-705 Remote Auto ATU
The other thing I wanted was some kind of stand for the IC-705 that would allow me to angle the radio such that the display and controls are always easily useable. On the ML&S site I found a nifty little tripod that will do the job nicely and so, that had to be included in the bundle.
Icom IC-705 Tripod stand
Fortunately for me the AH-705 was on special offer over the Easter Bank Holiday with 40% off making it the same price as the cheaper MAT tuner from china.
So I have now ordered an IC-705, matching AH-705 and the tripod all for the bundle price of £1504.87 including VAT, I even got free shipping thrown in too!
So that leaves just one more thing that I need to complete my radio solution, a morse key!
Having sold my Schurr Profi II Twin Paddle key (Been kicking myself ever since!!) a few years ago when I decided to take a break from radio I’m now in the position of not owning a morse key.
I did order a Vine Antenna RST-TP1 key from ML&S but, that had to go back (There’ll be an article about it coming very soon!) and so, I decided to spend a bit more and get a much better quality key.
Talking to many people online and Tony at ML&S it’s apparent that the Begali Morse keys are some of the best available these days. Looking on the Begali website they certainly have a great selection of high quality keys available, some for much more than I want to spend.
Begali Pearl Twin Paddle Morse Key
So after much consideration I decided to purchase a Begali Pearl Twin Paddle Morse key in Palladium and Gold with red paddles. It’s a super looking key and gets great write ups. It’s also their biggest seller, that says a lot.
More soon …
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