(Not) A long piece of wet string!

Last Monday we (M6BWA and M0JLA) set off for our usual short December jaunt to the Clwydian hills (not knowing they were on the brink of becoming famous as the possibly the next new National Park) with some reservations about the amount of damage that had been done by Storm Darraigh - especially by fallen trees. Our first goal was the Horseshoe Pass above Llangollen and we were unsurprised to be flagged down, just after crossing the bridge, to be told that the road was blocked and we’d have to go round to the other access. No, it wasn’t a fallen tree but a lorry that had started up the slope and expired in the middle of the road, thus blocking it completely. Back through the 20mph Llangollen and onto the rather interesting (very narrow and a bit winding) road marked ‘No HGVs’ as they wouldn’t have got past the first bend. We arrived a bit late at the closed Ponderosa cafe (‘might re-open in Spring’), changed in the cold wind and scuttled up our respective hills (we like s2s!). Me to the left Moel y Gamelin (GW/NW-042) and him to Cyrn-y-Brain (GW/NW-043) where we arrived at roughly the same time. As we were tight for time and the wind was cold, I hoped to avoid erecting the dipole and thus I huddled down with the VX7-R and RH770 telescopic aerial. Within 10 mins I’d bagged 5 2m and 7 70cm contacts including s2s with Rod on both bands. This was going well, but the high masts on the second hill (usually death to 2m fm)


seemed rather far away as I walked back into the wind and over the little hillocks before the descent to the pass, the car, the cafe and the next hill.

Up this hill I went more slowly (into the wind and I’m not fit) and decided that the small shelter was facing the wrong way, as usual, so sat on the outside and started erecting the dipole and getting out my essential black and yellow Sotabeam filter.
This usually deals with the interference from the mast on 2m but, unfortunately I haven’t yet found a 70cm filter and this is getting more of a problem throughout the UK. Rod had arrived on Gamelin and we managed a quick contact on 70cm but 2m was proving awkward, as expected. It took me some time to unravel the filter and long coax, not helped by, thanks to my cold hands, tangling slightly with the stones on which I was sitting. I was just surveying the filter which I hadn’t yet plugged into the dipole when the message came from a (cold and somehat impatient) M0JLA ‘How much longer are you going to take to fit that (slightly impolite adjective omitted) filter?’ The reply came more swiftly ‘Quite some time as the coax is in my left hand and the filter in my right. They seem to have parted company…’ Rod went strangely quiet -

as I gazed at the coax and bare end of wire

and wondered how I was managing to actually hear what he was saying from 2+ miles away in a strong wind! Well, of course, this longish piece of wire
was acting as an aerial (so why did I normally bother with the dipole and all the rest of the paraphenalia??) - or my ‘long piece of wet string’ that had been quoted to me when a contact was particularly strong and often not from very far away.
I duly logged this as a 2m contact (51/51) and decided there was no way in which I could rejoin the filter to the wire so I got on with trying to make 4 2m contacts with any combination of stick aerial, RH770 and dipole. As expected, this was not successful (I could hear none of the replies) and only spoke to MW1DSB in Denbigh who was near enough to cut through the interference. As the problem was that I couldn’t hear the chasers but they could hear me, they followed me to 70cm (not ideal but I could hear something between burst of ‘mast’) so I chalked up 7 70cm contacts in about 10 mins and the hill was qualified on 70cm if not 2m. While I was sitting there the summit was visted by 2 Open Reach vans - the first of which stopped dead at the sight of me sitting on my heap of stones - and I somehow felt he was trying to decide whether I was the cause of whatever problem was causing them to hurtle up the hill but he eventually drove off.having filed me as yet another of life’s mysteries (aka ‘oddballs’). Once i realised that I wasn’t going to make any more 2m contacts I packed up quickly and marched back down the hill (wind behind me!) to the car and thermos.
Rod discovered we had enough kit between us to make an alternative fitting for the filter but we were not then expecting to visit another be-masted hill. On Tuesday it was the well known pair of Foel Fenlli (GW/NW-051 and Moel Famau (GW/NW-044) with the the Penbara Pass and car parks between. Was the road going to be open? Well there was no notice at the turn - but a large red 'Road Closed Ahead about a mile further on. After some thought we turned round and found the alternative access from the other end which is much narrower but no-one else was moving in this area and the car park was reached - totally empty and a familiar red sign at the end of our usual road. Hello - there were a couple of cars in the (free) layby behind the sign and it looked as if they had come up the usual route. Anyway we booted up and went our separate ways (those s2s again!) and i chose to ascend Foel Fenlli first as it is rather steep and I want the easier walk later. The wind was brisk again and some minor fallen trees had been pushed aside but a lot of water had come down the path and even toppled a small leafy tree just off the path. Up to the ramparts by a good flights of steps. The path had been improved since my visit last year and some heather cut (on a 10 - 15 year rotation according to a Ranger I met later -primarily for the benefit of the black grouse which are found there). On to the cairn, up with the dipole (too cold for photos until I get out of the wind) and 16 contacts (9 at 70cm - a popular frequency for local chasers) in 25 mins which was very pleasing.

Pictures and more to follow tomorrow I hope.

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On Tosson Hill G/SB-007 yesterday the EFHW radiator became disconnected leaving just 4m of RG-58 and a 49:1 unun connected to the KX2. I could still hear Roger KF9D in Illinois on 10m :wink:

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Hi Viki,

I have observed your consistent activations on 2m and 70cm and marvel at the available contacts you seem to drum up. Well done.

We have a problem summit in Canberra, Black Mountain. It hosts a tower similar I’m told to the CN tower in Toronto. All the tv channels, fm channels and a host of other services transmits from there. Most HTs made in the last 20-30 years cannot deal with the amount of RF present there. I bought a SB filter to deal with the interference on 2m, and testing shows that it does help. However I have sometimes used a different technique to get my Icom V85 to hear better from that hill. I use the short stubby helical instead of anything longer and more efficient. I wonder if you have compared the usability of the helical with the longer antennas? If not, may be its worth trying.

The other method we have found to be effective is to tip the radio over so that the antenna is horizontally polarised. This seems to reduce the interference, I’m not sure whether orientation changes while horizontal, eg. End on to the tower make much difference but it sometimes makes contacts possible where the stock standard “FM is vertical” belief is meeting with resistance. FM isn’t vertical, it’s whatever the transmitter antenna is using…. And we think horizontal polarisation is better from summit to summit than vertical, from some experiments done over the years. But that’s another topic.

73 Andrew VK1DA/VK2DA

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Similar here but good for 15 QSO, one DL - W :laughing: Chaotic activations and don’t want to bring wire on a summit anymore

I read that report Ludwig and it promptly erased itself from my memories! I’m surprised how loud Roger was as only about 60cm of coax was vertical, the rest was laying on the ground.

Sorry for saying this but if you don’t coil the coax correctly when putting it away it’s more likely to get tangled when you next deploy it . And you never, EVER, untangle coax with both ends connected… this is what tends to happen.

I had coax handling drummed into me at a defence contractor. They analysed failures and found a significant number of faults where to do with cable/connectors so they made a big effort to make sure people knew what was happening and how to handle the cable and connectors. And cables that were disconnected/reconnected had to be logged so the ham-fisted culprit could be found if there was a breakage.

You should be able to find a VHF/UHF active ham local to who can crimp a new SMA on your feeder for you. You can probably buy a ready made cable. But if you have difficulty getting one, let me know and I can make one for you.

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Thanks for the suggestion, Andy.
We have a collection of SMA-BNC adaptors and, as I recall, the SMA lead was only used as it came with the filter. The filter was available for use on the next summit (not needed). For the permanent solution we just need a new short RG174 with a BNC on both ends. (Doesn’t need to be good for 70cm as it is out of cicuit on that band.)
Terminations of all sorts eem to be a weakness - my aerial termination croc-clip fell off (broken wire) as I was coiling (fig-of-8) the aerial at the end of a recent activation. I don’t think the “long” co-ax mentioned would qualify as such. Several 150mm turns absorb the whole length easily. My long co-ax all get fig-of-8 coiling. Guys too.
Just starting to arrange the next GM visit.
73,
Rod

This is co-ax so only the exposed 15 mm of inner should have been radiating and the SWR protection should have shut down the RF output of the radio. I hope to do some tests when time permits.
Rod

Let us know when the GM visit is happening, will try and coordinate. There is some planning going on here too…
Andy
MM7MOX

Tx Andrew for your suggestions. Yes, I have tired using a short aerial to avoid interference but usually find that I haven’t got the range on 5w for anyone to actually hear me but it certainly worth a try. Your other idea of trying horizontal polarisation is certainly worth my remembering when next in trouble (see account of the 6th activation of the trip - if I can get round to writing it (Christmas is getting in the way…)) I have used it before when requested by chasers but not thought of it while fighting a mast.
Many tx. 73 Viki

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Resuming the account of our 6 summits in NE Wales 9 - 11 December/

I left the summit of Foel Fenlli GW/NW-051 by walking round the rim of this rather splendid hillfort and then starting down the sets of rampart steps. By the 3rd rampart (it is an impressive hillfort!) I was really quite well protected from the wind and decided it was time for a brief rest and a look over to my next objective, Moel Famau GW/NW-044.


and wished I had a pair of wings with me so I could get there more quickly (I did say elsewhere that ‘the engine’ was starting to run down!).but it was only legs that were availablel so I started the descent

and could see that not many (any?) other cars had made it to the car park despite the dry weather. It didn’t take long to descend, traverse the parking and start the long (and slightly boring) track on the left to Moel Famau. As my feet don’t like hard tracks I took the less popular right fork up over the hill which doesn’t involve much extra height but did mean that I didn’t meet Rod on his journey in the opposite direction but suspected I’d missed him. On I plodded on another path

as the strange structure on top got closer but was careful not to try too hard as

I was warned that the ‘diffibrilwr’ was no longer there and was now quite some distance away. This was not a surprise as it hadn’t been there on my last visit when just the two supports were present but the foresters presumably thought they had to put an explanation (which is also in English but I thought you’d get the gist.) There was just the final pull and a quick search for the most sheltered side and then a quick s2s with Rod who was waiting as he had the shorter walk…

It took me some time to get the dipole up and chat to the ranger who drove up to check on some heather cutting that was going on.so it was 1400 before I called and 17 contacts (including 5 70cm) were made in 30 mins - a bit slower than earlier but ranging from Anglesey and Colwyn Bay to Oldham and Dudley. The clouds were gathering and the light fading as I walked down


admiring the distant sunshine and looking forward to a visit to the Druid Inn at LLanferres (always part of the ritual!).
PS (added later) When back at the car park we checked with the occupants of the next car who had arrived along the ‘Road Ahead Closed’ route and offered to lead us back. This we duly did but I noticed some flashing yellow lights in the distance. They soon turned back and waved us down to say that the road was, at last, really closed as they were clearing the trees near the toilet block, hence we turned round again and went back along the very narrow windy route back to the main road and round the hill yet again. Moral: if you see a ‘Road Ahead Closed’ sign it might or might not be open or it might be open when you don’t use it and not open when you do. I hope that clarifies the situation.

The next day we were on the way home via a lovely local hill and then another mast which, once again, was not a great success. … to be continued.
Viki

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Great report & pics, Viki. I’m sorry I missed you, I must have been otherwise occupied. FF & MF are two of my most popular chases & are my nearest 2-pointers, so I know them very well.
My X50 at home gives a very high SWR on 70cms for some reason, so I avoid that band at present-I know it is perhaps your favourite!
Hope to catch you & your other half again soon. 73 John.

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We packed up as swiftly as possible but left our community pub about 30 mins late so our alert on Moel Gyw GM/NW-053 was deferred (do I ever arrive on time?) once we’d parked in the large parking for ‘Clwyd Gate’. the building is still undergoing renovation and no-one was around to ask for permission. The Offa’s Dyke Path (ODP) crosses the busy A494 at this spot and the cars are in a hurry so great care is needed. We then followed the ODP

south past the waterworks (apparently in someone’s garden), through the fields and along the straight gently rising track to the signpost to the left. Then a more serious attempt to gain height leads to the trig point and cairn on the twin summits of Moel Gyw 467m. I chose the lee side of the cairn and was just erecting the dipole when a call came through. I immediately grabbed the radio (contacts here can be difficult to get) and talked to G4DEE up in Bury on 2m and 70cm and within 10 mins I’d got 5 on 70cm and it didn’t seem worth erecting the dipole more elegantly …

(with the trig point in the distance if you can bare to look more closely), the trick is just to photograph it from a different angle

where it looks more respectable!. Despite its shape the dipole worked well and in 30 mins I’d logged 16 contacts (7 on 70cm) including Bala and Colwyn Bay again but more from the Midlands and Dorrington (M7SDO) S of Shrewsbury probably because I wasn’t shielded by a large building behind me. The cold had seeped in so I closed down, packed up with numb fingers, collected M0JLA from his more sheltered spot (as ever) and retreated to the car admiring the views. A highly recommended 1 pointer - if you can park the car.
Then it was a SatNav route, via more of Wrexham than we wanted, to the infamous Long Mountain Beacon Ring GW/MW-026 408m just outside Welshpool with a very short flat walk to the summit (access to the actual hillfort blocked by brambles and fallen tree). The 2 enormous masts were immediately visible and, after having problems many years ago, I thought I knew how to cope this time. I therefore stopped on the track between the masts and called on 2m with a small stick aerial on the Yaesu VX7R but no-one replied - or rather I heard no-one. Hopes dashed I walked round the 2nd mast and along the ODP (‘tho’ I didn’t recognise it) in what had been a small wood but had been cleared. I set up the dipole against the fence, got out the re-jigged Sotabeam Filter and got ready to call

Before anyone comments, I know the dipole isn’t vertical (yet again) but i couldn’t be bothered to attempt to cross the barbed fence to put in another guy and i didn’t think it would solve my problems (if any!) Forty min later I certainly knew I had problems and this time 70cm was not coming to my rescue as every 70cm frequency was S6 noise and I didn’t hear anyone at all and had no idea if anyone was trying to talk through it. This interference was unusually severe as it usually a pulse or intermttent noise not just an almost constant wipeout. On 2m I tried everything I could think of including with and without the dipole and/or filter, standing up, sitting down, stretching the coax out (and swearing) but, stupidly, I never tried lowering the dipole for horizontal polarisation or holding the handy and stick aerial horizontal. On 2m all I heard was nothing for almost all the time but I did eventually get 4 on 2m including 2 very close chasers (M0LMZ, 2E0VXV). By then it was 1600 and starting to get dark as I packed up, threw the handy into a carrier bag in my hand and started walking - and I heard something! Someone was calling on 145.500! This puzzled me and another 2 calls were heard as I walked back to the car. with hindsight I now wonder if it was because the radio was lying horizontal in the bag - doh!
I had time on the drive back to Hereford to ponder on my 2m mast problems which had been tamed for so long by the trusty Sotabeam filter but it now seems that it is not quite as bomb(mast?)proof as I had thought. I will not hurry to seek out more heavily masted hills (especially while it it is cold and windy) but I must have another go next year.
Meanwhile there are 4 ‘local’ 2 pointers still on this year’s list and the forecast is wild and windy but we will see if we can manage a bit of a ‘quick one’ perhaps on Monday morning or sometime during the next 10 days. I wish everyone a Happy Christmas and a safe and healthy year ahead and I won’t be going out in a thunderstorm after seeing and hearing those recent accounts and pictures (especially from the Cobbler).
73 Viki

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A while back I worked Tom M1EYP who was on Long Mountain using his FT70 hand held with the supplied antenna. IIRC, he was holding it horizontal, and close to the ground in order to copy me - which might support your theory! It probably wouldn’t help with dx contacts, but worth a try if all else fails.

Sorry to have missed you both for most of your travels.
Happy Christmas and best wishes for the New Year

Adrian
G4AZS

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The measured figures for the VX7 do show it to have very poor RF performance in these circumstances. Buy a used FT-60 and these problems will be a thing of the past.

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If it’s the same as with ZL policies your insurance is invalid as soon as you pass a road closed sign. Road ahead closed should be ok though!

Great report and lovely pictures.

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I know - but we have several VX7s. and a stack of batteries so the investment involved is a deterrent to change, especially as the number of problem hills is so small. When I used to carry the ft-817 or 857 on the hills we could use those for 2m on the affected summits. The TX500 lacks that facility - but is much more convenient to carry for HF.
73,
Rod

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eBay solves that issue :wink:

Sorry if it was me I’d just stop trying to bale out the Titanic with an egg cup and use something that works well. Yes you can add filters and do this and that. But it reminds of a guy I was talking to who had bought an Audi A4 and had changed the tyres/wheels. Uprated the suspension, fitted bigger discs and uprated brake pads. He was next going to change the turbo and play with the ECU mapping. “Slowly I’m making a real performance car”. He just went blank when I asked him “Why didn’t you just buy an S4 or an RS4?” (The S4 is high performance A4 and RS4 is a high performance S4).

It’s the same with radios you know will be exposed to rubbish RF environments. Just buy something that works.

You could ask Fraser about the difference between his VX-7 and my VX-170 at Cairnpapple Hill. The thing is I bought the VX-170 because they had a reputation for being tough and waterproof. The fact they have excellent performance by other masts and unpleasant RF environments was a bonus.

So ditch the VX-7s and batteries and get an FT-60. Or use the 817. Well that’s what I’d do. YMMV

I don’t think the cost of two filters and a replacement coax is in quite the same league of expenditure. There are also not very many hills with aggresive masts. If some new system that caused a problem was to be widely deployed then your solution would be sensible.
Merry Christmas; hope to speak soon.
73,
Rod