Charlie Tango 11m DX Radio Group Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.


Welcome to the Charlie Tango DX Group. The home of ALL things Radio - CB, 11m DX, Amateur, PMR446, PLD, Network and Data. We welcome all radio enthusiasts of all knowledge levels. Join today and claim your own unique World Famous CT Call-sign
 
HomeEventsCalendarFAQSearchRegisterLog in
XMAS COMPETITION: Win a Brand New Yaesu ft891 with Wideband Modification and to help the winner use it we are including a 30 Amp Power Supply on top. This is our biggest prize yet. All this could be yours for Christmas for just £20. - See Latest News Forum for details.
Latest Buxton 2020 News: Unfortunately, due to the Covid-19 pandemic we have had to cancel this year's Buxton date. Sorry for any inconvenience.
Navigation
Useful Radio Sites
Log in
Username:
Password:
Log in automatically: 
:: I forgot my password
CT Bill Board





Views This Year
All Time Views
Classified Adverts

Latest topics
» New member
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 5:46 pm by DX Master

» Looking for eqsl
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 4:35 pm by 26ct954

» Call sign (Issued)
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 2:02 pm by Chefsdead

» New Member Callsign Request (Issued)
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 1:41 pm by pipart20

» Foundation
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 1:10 pm by John123

» 11m conditions
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 1:08 pm by John123

» Alloy scaffold pole
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 11:46 am by NUBSTER

» Introduction & call sign request (Issued)
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 9:07 am by GaryWilson

» Call sign request (Issued)
Connectors and Coax SMA-BNC-N- UHF Icon_minitimeToday at 9:02 am by GaryWilson

Keywords
power Mckinley tango chart bazooka sign charlie radio lincoln 9900 Mobile alan division Sirio Calling list midland callsign call ss9900 frequency ss6900n antenna tickets president 6900n
QRZ Database

 

 Connectors and Coax SMA-BNC-N- UHF

Go down 
AuthorMessage
ArAKern
New Member
New Member


Posts : 7
Times Thanked : 0
Join date : 2019-11-01
QTH or Location : Southampton
Equipment Used : CRT CB PMR

Connectors and Coax SMA-BNC-N- UHF Empty
PostSubject: Connectors and Coax SMA-BNC-N- UHF   Connectors and Coax SMA-BNC-N- UHF Icon_minitimeThu Nov 19, 2020 5:14 pm

Hello Et All 

I am trying to decide what connectors to use on my antenna runs and what impact adaptors have.
So i will have the following scenarios:-
 
Home Base PMR 446 10 meter run from transceiver to antenna
Tranceiver 1 UHF female
Tranceiver 2 SMA male 
Coax to BNC : Transceiver 1 = BNC to UHF male adapter  / Transceiver 2 = BNC -  SMA Female
Coax to SMA : Transceiver 1 = SMA to UHF male adapter /  Transceiver 2 = SMA male - SMA female adapter
Coax to UHF:Transceiver 1 no adaptor required / Transceiver 2 =  SMA Female - UHF male
Coax to Type N : Transceiver 1 = UHF male adapter - tupe N male  Transceiver 2 =  SMA male -type N Female 

I understand the SMA is the better connector at UHF but I cannot find a coax to SMA female which would be ideal. 
My other concern is the large adapters ie SMA to UHF type N hanging off the handheld and stiff R213 coax. 
another option is to use a pigtail of Mini 8 but that means another 2 adapters and some very lossy coax.

With the current antenna run of just 10m any further loss through adapters and pigtails makes a difference especially when you only have 0.5mW to start with!
10m RG58 = -5.5dB ~70% loss 
10m RG213 = -1.7 dB ~32% loss

Sorry this post got a bit rambling 
Thanks
Back to top Go down
View user profile
Victor
CT Directors
CT Directors
Victor

Call Sign : 26-CT-3228 Ham M7VIC
Posts : 1036
Times Thanked : 63
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

Connectors and Coax SMA-BNC-N- UHF Empty
PostSubject: Re: Connectors and Coax SMA-BNC-N- UHF   Connectors and Coax SMA-BNC-N- UHF Icon_minitimeThu Nov 19, 2020 9:03 pm

It's all fun at UHF! Wink

Crimp coax connectors are available in every fitting and when properly terminated present the lowest loss.

10m LMR400 = 1.1dB ~ 19% loss
10m LMR600 = 0.7dB ~ 12% loss

That's why this type of coax is expensive. The trick at UHF is to keep coax runs as short as possible.
Pay extra and you can have coax cable cut to length and terminated professionally.

Properly terminated UHF pigtail adapters, (can usually be purchased ready manufactured in virtually every fitting), present such a small loss that it's not worth worrying about.

None of this an issue with commercial installation but hits the wallet for hobby use.


Just my tuppence worth.

All the best,
Victor

glenn dog likes this post

Back to top Go down
View user profile
glenn dog
Contributor
Contributor
glenn dog

Call Sign : 56-CT-004
Posts : 88
Times Thanked : 5
Join date : 2019-08-23
QTH or Location : TUUSLA- FINLAND
Equipment Used : ft-450d-mc kinley - cobra 19dxeu- lincoln+2 - superstar lord - grant 2 - tti hand held- alan42- crt mike cb - zodiac 68 hunting radio hand held- and few PMR 2
Age : 52

Connectors and Coax SMA-BNC-N- UHF Empty
PostSubject: Re: Connectors and Coax SMA-BNC-N- UHF   Connectors and Coax SMA-BNC-N- UHF Icon_minitimeFri Nov 20, 2020 4:16 am

Nice info there from Victor, my local Radio dealer made my coax up for me, and gave it a 12mth fault cover service.

Victor likes this post

Back to top Go down
View user profile
ArAKern
New Member
New Member


Posts : 7
Times Thanked : 0
Join date : 2019-11-01
QTH or Location : Southampton
Equipment Used : CRT CB PMR

Connectors and Coax SMA-BNC-N- UHF Empty
PostSubject: Re: Connectors and Coax SMA-BNC-N- UHF   Connectors and Coax SMA-BNC-N- UHF Icon_minitimeFri Nov 20, 2020 9:14 pm

Thanks Victor.
Still struggling to find any SMA female coax connectors.

I currently have Rg58 mill spec this is just for building antennas.(next is a 11m DIY gainmaster)
I have used R213 for a DIY bazooka and for the HF coax runs.

The UHF coax runs I currently have ultraflex 7 and westflex 103.
Ultraflex @ 400Mhz 11.8 dB/100m
Westflex @ 400Mhz 11.0 dB/100m (solid core makes bend radius an Issue).

May have to upgrade to LM600 or ultraflex 13.
(but for the price of 10m of that coax I could buy a amplifier or transceiver with 25w+ output)



Back to top Go down
View user profile
Victor
CT Directors
CT Directors
Victor

Call Sign : 26-CT-3228 Ham M7VIC
Posts : 1036
Times Thanked : 63
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

Connectors and Coax SMA-BNC-N- UHF Empty
PostSubject: Re: Connectors and Coax SMA-BNC-N- UHF   Connectors and Coax SMA-BNC-N- UHF Icon_minitimeSat Nov 21, 2020 5:38 am

Hi Giles,

No worries, all in the name of hopefully helping out.

If you're struggling to find a particular type of connector then look for 'barrel adapters'. They come in many flavours and you can adapt most any connector.

I did mention UHF can hit the wallet Wink


All the best,
Victor
Back to top Go down
View user profile
43CT016
Contributor
Contributor
43CT016

Call Sign : 43-CT-016
Posts : 86
Times Thanked : 4
Join date : 2019-11-17
QTH or Location : Perth
Equipment Used : iCom IC-7610/IC-9700

Connectors and Coax SMA-BNC-N- UHF Empty
PostSubject: Re: Connectors and Coax SMA-BNC-N- UHF   Connectors and Coax SMA-BNC-N- UHF Icon_minitimeSun Nov 22, 2020 2:06 am

ArAKern wrote:

May have to upgrade to LM600 or ultraflex 13.
(but for the price of 10m of that coax I could buy a amplifier or transceiver with  25w+  output)


Spend the money on coax first, as an amp won't help on receive.  As the old saying goes; if you can't hear them, you can't work them!

With decent coax (I regard LMR400 or equivalent as a minimum on UHF) I wouldn't worry too much about adapters or pigtails, as long as they're quality ones and not eBay junk.

Victor likes this post

Back to top Go down
View user profile
Sponsored content




Connectors and Coax SMA-BNC-N- UHF Empty
PostSubject: Re: Connectors and Coax SMA-BNC-N- UHF   Connectors and Coax SMA-BNC-N- UHF Icon_minitime

Back to top Go down
 
Connectors and Coax SMA-BNC-N- UHF
Back to top 
Page 1 of 1

Permissions in this forum:You cannot reply to topics in this forum
Charlie Tango 11m DX Radio Group Forum :: Help and Discussion Forums :: Antenna Discussion-
Jump to: