The 4 m Forum

by **MI6ZTM** » Mon 11 Jul 2011, 19:14

can anybody give me information. for a 4 m antenna thanks michael rig comming this week..........

by **PD8F** » Mon 11 Jul 2011, 22:13

Hi Michael. I'm a 4m newbie as well and I'm told that a Sirio vertical is a good aerial to start with. I ordered one last weekend and it has just been shipped today.

Search on Ebay for: Sirio CX-4-68 VHF 68-73Mhz There is a seller in Manchester charging GBP 58.31 for a brand new one, free shipping within the UK and GBP 7.06 to Ireland.

Just curious, which rig will you be using?

73, Floyd

by **GW8ASD** » Mon 11 Jul 2011, 22:35

MI6ZTM wrote:can anybody give me information. for a 4 m antenna thanks michael rig comming this week..........

Are you going to be FM only or SSB as well?

Cheers

Tony

by **MI6ZTM** » Tue 12 Jul 2011, 07:23

philips fm1100 from ebay i dont know nothing about this rig .......i just know its 70mhz. :?:

by **GW8ASD** » Tue 12 Jul 2011, 08:01

MI6ZTM wrote:philips fm1100 from ebay i dont know nothing about this rig .......i just know its 70mhz.

That's FM PMR equipment.
Check 7(2) on your licence.
Just so you know.

Cheers

Tony

by **MI6ZTM** » Fri 15 Jul 2011, 11:55

if its prm i sell it on to gi4 station

by **MI6ZTM** » Sun 24 Jul 2011, 16:46

PD8F wrote:Hi Michael. I'm a 4m newbie as well and I'm told that a Sirio vertical is a good aerial to start with. I ordered one last weekend and it has just been shipped today.

Search on Ebay for: Sirio CX-4-68 VHF 68-73Mhz There is a seller in Manchester charging GBP 58.31 for a brand new one, free shipping within the UK and GBP 7.06 to Ireland.

Just curious, which rig will you be using?

73, Floyd

not good the db gain 2 low tips on a beam 4mtr antenna would be great

by **G4YVM** » Sat 17 Sep 2011, 11:27

GW8ASD wrote:
MI6ZTM wrote:philips fm1100 from ebay i dont know nothing about this rig .......i just know its 70mhz.

That's FM PMR equipment.
Check 7(2) on your licence.
Just so you know.

Cheers

Tony

Tony, this has me intrigued. The item 7 (2) state that the radio must be "commercially available" and satisfy IR2028. The PMR radio IS commercially available, albeit on a different band. If it is later modified and sold then it is still "commercially available". IR 2028 states the power output etc, but nowhere that I can see does it state "no modified PMR gear shall be used"

I'm rather arguing for clarification here than arguing on principle.

David

by **GW8ASD** » Sat 17 Sep 2011, 12:35

G4YVM wrote:Tony, this has me intrigued. The item 7 (2) state that the radio must be "commercially available" and satisfy IR2028. The PMR radio IS commercially available, albeit on a different band. If it is later modified and sold then it is still "commercially available". IR 2028 states the power output etc, but nowhere that I can see does it state "no modified PMR gear shall be used"

I'm rather arguing for clarification here than arguing on principle.

David

http://stakeholders.ofcom.org.uk/binaries/spectrum/spectrum-policy-area/spectrum-management/research-guidelines-tech-info/interface-requirements/ir2028.pdf
Section 1 - References - gives the info.

PMR equipment is not "commercially available" as amateur equipment.
Most PMR equipment used for conversion doesn't conform to current PMR specifications.
That's why it is available cheaply.

Current spec land mobile radio equipment conforms to IR 2044
http://stakeholders.ofcom.org.uk/binaries/spectrum/spectrum-policy-area/spectrum-management/research-guidelines-tech-info/interface-requirements/ir20441.pdf

Cheers

Tony

by **G0FDM** » Fri 7 Oct 2011, 11:23

I have just got a wouxon 2m/4m handheld thing. Seems to work on 2 ok but nothing heard on 4m as yet so looking to put up some sort of aerial.

On fm only so the question is verticle or horizontal?

I know many bands use SSB on Horizontal and FM/AM Vertical wondered if that was still the case here.

Nick G0FDM

by **GW8ASD** » Fri 7 Oct 2011, 13:11

G0FDM wrote:I have just got a wouxon 2m/4m handheld thing. Seems to work on 2 ok but nothing heard on 4m as yet so looking to put up some sort of aerial.

On fm only so the question is verticle or horizontal?

I know many bands use SSB on Horizontal and FM/AM Vertical wondered if that was still the case here.

Nick G0FDM

Local FM working is vertical.
I use a certain amount of FM, mainly for DX, using a horizontal 7ele Eagle.
Most of the DX stations I've worked, on FM, seem to use horizontal polarisation.
They seem to use FM, SSB and MGM, like me.
I've no idea what FM activity is like around your area but I work quite a lot of SSB stations down there.

Cheers

Tony

by **EI7GMB** » Fri 7 Oct 2011, 20:04

We done some tests of this HT and it has reached nearly 20km handheld to mobile. Certainly an "original" rubberduck antenna for 4m is not very good at all - I was heard but I didn't hear the other party. With third party antenna comms were 100% each way (Wouxun 5w to Ascom 25w 1/4L mobile).

by **G0FDM** » Thu 13 Oct 2011, 01:28

Thanks Tony

The slim jim is up and working, still not a lot heard so will keep trying. Its lying against the shed at the moment waiting for me to make a mounting bracket and put it up a bit higher.

2m seems to work ok but can't get over how quiet all the bands are now.

Nick

by **GW8ASD** » Thu 13 Oct 2011, 08:58

G0FDM wrote:Thanks Tony

The slim jim is up and working, still not a lot heard so will keep trying. Its lying against the shed at the moment waiting for me to make a mounting bracket and put it up a bit higher.

2m seems to work ok but can't get over how quiet all the bands are now.

Nick

I took a break from the radio during parts of the 80s and 90s.
Three things struck me when I came back on.
There were some very odd sounding callsigns.

The content of the QSOs I heard , on 2M/70cm FM, was very strange and non technical. Especially on repeaters! and repeaters seemed to have a lot of fixed stations on them!
The SSB ends of 2M and 70cm were much quieter than I remembered and there didn't seem to be the number of people on late at night / in the early hours.

The only band I use FM on is 4M, and even then very little.
Around 4%. 130 contacts out of 3,085, since I've been on the band. (A little less than 8 years.)
More than 25% of the FM contacts were between 1,000 and 2100km with nearly all those stations using horizontal polarisation.
Hopefully that will give you an insight into how I've found 4M.

Cheers

Tony

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