Aerial connection for Icom IC-M71

Trotter

Hi all,

Does anyone know where I would get a connector or adaptor online so that I can take the stock aerial off the Icom IC-M71 VHF radio and use an aerial I have in the attic?

Its on a length of wire but the connector on the cable wont suit the radio. I've asked in local radio/electronics shops but seemingly they're impossible to get.

CrowdedHouse

This :

http://cgi.ebay.co.uk/SMA-plug-UHF-jack-SO239-pigtail-cable-/300426267502?pt=UK_Computing_Networking_SM&hash=item45f2cd0b6e

Trotter

Fantastic.. Thanks a lot!!

As an alternative, What would I be after if I was to clip the connector off the aerial and get a connector that fitted directly to the radio?

CrowdedHouse

It's an SMA plug (male)

....but..

Generally you need to have a special crimping tool and possibly the coax from your aerial might not be the correct size for the plug.

That adaptor will give you more flexibility

brownmini

Trotter wrote: »

Hi all,

Does anyone know where I would get a connector or adaptor online so that I can take the stock aerial off the Icom IC-M71 VHF radio and use an aerial I have in the attic?

looks like this might do you too ???


http://cpcireland.farnell.com/pro-signal/psg01978/adaptor-uhf-s-to-sma-p/dp/AV15526

and while yer at it...

http://cpcireland.farnell.com/pro-signal/psg01974/adaptor-bnc-s-to-sma-p/dp/AV15522

or

http://cpcireland.farnell.com/pro-signal/psg01673/adaptor-bnc-to-uhf/dp/AV15221

Trotter

CrowdedHouse wrote: »

It's an SMA plug (male)

....but..

Generally you need to have a special crimping tool and possibly the coax from your aerial might not be the correct size for the plug.

That adaptor will give you more flexibility

Just wondering.. Its a VHF radio.. will that connector being UHF cause any hassle?

CrowdedHouse

No...UHF is just an old name given to that type of connector decades ago, it's almost never actually used for UHF.

watty

It's actually a connector only good to about 170MHz. When the PL259 (aka UHF plug) was invented they regarded 300MHz as the top of UHF, and over 100MHz was UHF!

The TV plug (Belling lee) is also very poor for UHF, as it was invented for 500KHz to 30MHz MF/SW radio!

TV in UK when started was only at 45MHz. Most TV wall plates are based on Band I 1950s designs.

Good UHF connectors are BNC, SMA, N-Type, TNC, FME, F-Type These all work to 3GHz. "good" SMA work to over 22GHz.

FME is a 50 Ohm connector with pin similar to 75 Ohm F-Type (which uses solif coax core as pin)
BNC and N-Type come in 50 Ohm and 75 Ohm versions. (inner pin differs in size)
TNC is screw on version of BNC
N-Type is inner of BNC with larger separated outer screw on cover to make electrical and mechanical connection separate.

S0238/PL259 is LF to VHF and has even been used for Composite video.
75 Ohm version BNC is also used for Composite, RGB and Component Video from TV to Ultra HD.
75 Ohm N-Type mostly only used for Cable TV trunks. 50 Ohm for aerials.
Musa is 75 Ohm jack version of BNC (no screw or bayonet lock) used mostly for video.

Fuzzy Clam

watty wrote: »

It's actually a connector only good to about 170MHz. When the PL259 (aka UHF plug) was invented they regarded 300MHz as the top of UHF, and over 100MHz was UHF!

The TV plug (Belling lee) is also very poor for UHF, as it was invented for 500KHz to 30MHz MF/SW radio!

TV in UK when started was only at 45MHz. Most TV wall plates are based on Band I 1950s designs.

Good UHF connectors are BNC, SMA, N-Type, TNC, FME, F-Type These all work to 3GHz. "good" SMA work to over 22GHz.

FME is a 50 Ohm connector with pin similar to 75 Ohm F-Type (which uses solif coax core as pin)
BNC and N-Type come in 50 Ohm and 75 Ohm versions. (inner pin differs in size)
TNC is screw on version of BNC
N-Type is inner of BNC with larger separated outer screw on cover to make electrical and mechanical connection separate.

S0238/PL259 is LF to VHF and has even been used for Composite video.
75 Ohm version BNC is also used for Composite, RGB and Component Video from TV to Ultra HD.
75 Ohm N-Type mostly only used for Cable TV trunks. 50 Ohm for aerials.
Musa is 75 Ohm jack version of BNC (no screw or bayonet lock) used mostly for video.

Watty, why can't you just answer the question asked?

watty

You don't get charged for using up paper and ink here.

Maybe someone might like to know more.