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Uhf


#1

Just recently, I’ve been surprised by how many chasers, both HuMP and SOTA, ask if I have UHF with me when I’m operating on the VHF band and would I QSY?

Let me say, I’m as guilty as the next man for not using the band enough and the amount of activations I’ve used the band can be counted on one hand.

I’m always happy to QSY and work a chaser (especially as it’s just a push of a button when using a dual band collinear) and then inevertably someone else calls break. This is an interesting band and I’m often surprised at the distances that can be achieved. Maybe it’s a bit nostalgic for the old class B licences who were restriced to this band and above millions of years ago.

How things have changed…

I have also noticed that very often, a CQ on 433.500 will produce zilch even from 1800ft ASL! Do chasers monitor 433.500 anymore?

Maybe, I’ll do an activation only on UHF one day and see what DX is possible and how many chasers can be found.

73 Mike
2O0YYY


#2

Away in Motor Home at moment Mike,wait until I return and give me a call on 432.200 with a proper radio and horizontal arial (leave the funny mode hh at home)and a good chance we will make it,ask Gerald G4OIG how many hills he has qualified on 70cms. 73 Don.


#3

In reply to G0RQL:
Hi Mike,

Colin and I monitor 70cms fm at home.

We will also operate and listen on this band when portable along with 4m fm time permitting.

For me the switch over is easy as the j-pole used on the fells is dual band and h/h quad band.
The results to date are rather mixed and 70cms is

underused but produces some interesting results.
Not had any joy with 6m but 4m is also proving interesting now that more people are using it.

Maybe catch-up with you on 70cms soon as well as 2m fm.

73

Liz


#4

In reply to G0RQL:

Hi Don,

I’ll drag the beam out of retirement …if i can find it!

73 Mike
2O0YYY


#5

In reply to M6EPW

Hi Liz,

70cms down to the South Pennines from your part of the world on my vertical would be a very good contact indeed. This may even call for the X510. Bit of a lump to carry too far though.

I’ll listen out for you on 70cm…

73 Mike
2O0YYY


#6

In reply to 2E0YYY:

Just recently, I’ve been surprised by how many chasers, both HuMP and
SOTA, ask if I have UHF with me when I’m operating on the VHF band and
would I QSY?

Let me say, I’m as guilty as the next man for not using the band
enough

“the band”? We have several UHF bands as UHF runs from 300-3000MHz. Equally we have several VHF bands (30-300MHz).

73

Richard
G3CWI


#7

In reply to G3CWI:

I was about to say the same thing myself!! If anyone thinks 433 MHz is quiet! Then try 1297 MHz FM, if it was not for Stewart G0LGS and Graham G4FUJ, I would hardly get a QSO on 23cm!

70MHz is an excellent band here in the West Midlands, with the Wouxun HH there has never been a better time to give the band a go! Friendly people, good DX and in the summer it opens up! Working Croatia on 5 watts with a slim jim from a local high spot last year was quite novel!!

Mike I will see you on 50/70/144/433/1297 MHz soon!

Has anyone tried 13cm?

Matt


#8

In reply to G8XYJ:
You think 1297 is quiet, you should try 20m from my QTH this morning.
.
.
.
.
.
.
.
Until I remembered I has disconnected the aeriels due to a thunder storm on Wednesday evening!

Oops :slight_smile:


#9

In reply to G8XYJ:

Has anyone tried 13cm?

Yes but not yet for SOTA - just haven’t got round to being on a summit for the Tuesday evening UKAC. There are usually around 15 stations entering over the UK, with a few (3-5) going /P. A few more stations are active but don’t necessarily submit logs. I know of a good half dozen regulars in GM I have worked.

I’m still running a very limited setup though - just a few watts to a 12-ele DL6WU - which is only about 40cm long! Contacts to 100km are still easy though.

I use a home brew transverter:

http://www.marwynandjohn.org.uk/GM8OTI/proj13cmtvtr1/proj13cmtvtr1.html

I’m hoping to build a rather longer antenna and up the power to around 20W, with which I would expect to make easier contacts down into G-land.

We’re talking SSB here of course :wink: - though I can transvert FM equally well I’ve never had to. Wastes the batteries.

73
John GM8OTI


#10

In reply to GM8OTI:

Somebody should really organise another UHF funday as I thoroughly enjoyed the last one in 2011.

So I guess that will be me then!

SOTA UHF Funday/Funweekend. to take place over the weekend of September 8th/9th 2012. Aim to activate/chase summits using 70cms/23cms and higher. (Of course other bands welcome but let’s try to be active on UHF!)

Sep 8th is NA SOTA activity day and Sep 9th is 2nd 70MHz contest. So in addition to UHF operating there’s the chance of NA S2S contacts on Saturday and 4m contacts on Sunday. Plus whatever we can achieve on UHF.

I think there was a 5 way S2S QSO taking place between GM activators at one time last year :slight_smile:

Andy
MM0FMF


#11

In reply to MM0FMF:
Im up for Sunday the 9th at about 1200 GMT? Any other takers?

Matt G8XYJ


#12

In reply to MM0FMF:

Somebody should really organise another UHF funday as I thoroughly
enjoyed the last one in 2011.

Sounds good. Lets just hope the weather is good for September 8/9.

73
John GM8OTI


#13

In reply to MM0FMF:

SOTA UHF Funday/Funweekend. to take place over the weekend of September 8th/9th
2012. Aim to activate/chase summits using 70cms/23cms and higher. (Of course
other bands welcome but let’s try to be active on UHF!)

I will try to be active on 70cm that weekend.

But be careful … the Olympic Games operating restrictions will still be in force, affecting the 70cm band and also the 2.3 and 3.4 GHz bands. The restrictions are extremely complex. Of particular relevance: 432 - 433 MHz is subject to restrictions, and this is the part of the band that is normally used for amateur SSB operation.

Details are on the Ofcom website.
http://licensing.ofcom.org.uk/radiocommunication-licences/amateur-radio/ar_spectrum_use

The information is far from clear (!) but it does seem to indicate that, exceptionally, 70cm contest activity will be tolerated on the weekend 8 - 9 September. Make of that what you will!

73,
Walt (GO3NYY)


#14

In reply to G3NYY:

I’d be delighted if my low power signals from GM were capable of causing disruption to some of the London venues! It would suggest conditions were excellent :slight_smile: I’m not sure what Duffcom would do if there was a some serious tropo and the Olympic users were affected by legitimate use in F, ON or PA? We all know RF obeys national borders!

But to be serious, you are right. However, I think we can find the wherewithall to cope. A few reminders before the day to clarify the temporary restrictions. Of course they should have taken the spectrum used (abused?) by repeaters first. That would have had the benefit of not being missed by serious radio users and forcing repeater dwellers to have proper QSOs! (Can you tell it’s Friday yet?)

Andy
MM0FMF


#15

In reply to MM0FMF:

Andy… I understood that some of the football was being played in Glasgow!?


#16

In reply to G7LAS:

You checked the map didn’t you?

Andy
MM0FMF


#17

In reply to MM0FMF:

I all of a sudden feel like I’ve missed something!

:s


#18

In reply to G7LAS:

Oops!


#19

In reply to 2E0YYY:

I thought I would trawl through my chaser log for 70cm contacts. I found four, in eight years of chasing! All on SSB, and to my surprise only one could be regarded as local, CE-003. The others were NW-051, WB-005 and SW-007. Set that against various times when I couldn’t raise FM operations even from my nearest Marilyn, CE-002!

My experience is that from this location (with its plethora of trees) FM on 70 is a dead loss but respectable ranges can be achieved on SSB - but only if A) somebody operates on SSB, and B) if they beam this way. There have been occasions when I have called an activation on 70 SSB and he has gone back to somebody else, swung his beam - and that is the last I have heard of him!

As a, er- venerable old G8Axx I have a soft spot for 70 cms and am prepared to have a go at working anybody prepared to go out with SSB, but when it comes to FM my time and effort can be spent more profitably on the “DC bands”!

73

Brian GO8ADD


#20

In reply to G8ADD:

As a, er- venerable old G8Axx …

I remember, in days of yore (well around 1969, actually), from my London QTH I quite often worked G8AAA. It was all crystal controlled AM in those days. His name was Bert and he lived in Beckenham, Kent. He had rather a high pitched voice, which made him instantly recognisable on the air! Presumably he was the first Class B licensee.

I wonder who was the first M3. :slight_smile:

73,
Walt (GO3NYY)