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

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
» call sign request
Venom 1/2 wave SWR Issue Icon_minitimeToday at 3:33 am by Rommywolf

» CRT SS 6900 N
Venom 1/2 wave SWR Issue Icon_minitimeToday at 1:02 am by Chickenfoot@1987

» Whippy Antenna connector
Venom 1/2 wave SWR Issue Icon_minitimeToday at 12:38 am by Chickenfoot@1987

» New Member introduction
Venom 1/2 wave SWR Issue Icon_minitimeToday at 12:36 am by John123

» New member
Venom 1/2 wave SWR Issue Icon_minitimeToday at 12:33 am by John123

» New Member & Call Sign Application Request
Venom 1/2 wave SWR Issue Icon_minitimeToday at 12:32 am by John123

» is there anyone using cb/ sideband in the Torquay area?
Venom 1/2 wave SWR Issue Icon_minitimeYesterday at 10:30 pm by Azza

» HF Contacts 10m
Venom 1/2 wave SWR Issue Icon_minitimeYesterday at 6:49 pm by Rjbingham

» BREMI BRL 200 Valve Amplifier
Venom 1/2 wave SWR Issue Icon_minitimeYesterday at 5:04 pm by Snowman

Keywords
chart president coax callsign bazooka Mobile Mckinley Calling ss6900n display lincoln antenna ALINCO 6900 frequency ss9900 list division sign 9900 radio Sirio midland power SS6900 call
QRZ Database

 

 Venom 1/2 wave SWR Issue

Go down 
3 posters
AuthorMessage
MotorRacingBruce1980
New Member
New Member
MotorRacingBruce1980

Call Sign : 26-CT-4255
Posts : 4
Times Thanked : 0
Join date : 2021-09-21
QTH or Location : Lancing, West Sussex
Equipment Used : CRT2000, Sirio ML145, Venom 1/2wave
Age : 40

Venom 1/2 wave SWR Issue Empty
PostSubject: Venom 1/2 wave SWR Issue   Venom 1/2 wave SWR Issue Icon_minitimeSun Sep 26, 2021 10:39 am

Hi All,

Back on CB's after 20 years and instead of just going mobile this time I setup a home base.

I'm using a CRT2000 with 7 metres of Mini8 low loss coax, I have a Venom 1/2 wave silver rod mounted 10ft above ground level and have checked the SWR which is as follows.

Channel 1 = 1:1
Channel 20 = 1:1
Channel 40 = 1.2:1

This seems very low to me but as Channel 40 is higher I did try shortening my antenna which made no difference even when I reduced it by a foot!

Do I have an issue or am I just very lucky to have a well matched radio and antenna?

I can get through to people about 5 mile away and I can hear them clearly but I do get quite a lot of noise aswell.

Any help and advice much appreciated.

Victor likes this post

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

Call Sign : 26-CT-3228 Ham M7VIC
Posts : 2369
Times Thanked : 161
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

Venom 1/2 wave SWR Issue Empty
PostSubject: Re: Venom 1/2 wave SWR Issue   Venom 1/2 wave SWR Issue Icon_minitimeSun Sep 26, 2021 11:10 am

Hi Bruce,

Sounds like job's a good'un! Venom 1/2 wave SWR Issue 1f44d


These half wave antennas have a good SWR range, if I recall something like a 1:1.5 range of over a MegaHertz. They make for good 28Mhz/10m antennas too.

We do have to suffer much more noise nowadays on pretty much all the HF range compared with decades ago unfortunately....all those PC's, laptops, tablets, chargers, etc. spewing RF noise everywhere! Always RF 'quieter' when you can go mobile and get away from such urban noise. Don't despair though, you can chase the proverbial 'dogs tail' trying to track down RF noise. If it isn't that bad I wouldn't worry, (and I'd rather sit in comfort at a homebase radio than a cold night on a hill in the car!)

When there is no prorogation or 'skip' CB range is fairly limited but once that 'skip' is in it's all exciting as hell. Smile



All the best,
Victor

SangueG and MotorRacingBruce1980 like this post

Back to top Go down
View user profile https://www.qrz.com/db/M7VIC
MotorRacingBruce1980
New Member
New Member
MotorRacingBruce1980

Call Sign : 26-CT-4255
Posts : 4
Times Thanked : 0
Join date : 2021-09-21
QTH or Location : Lancing, West Sussex
Equipment Used : CRT2000, Sirio ML145, Venom 1/2wave
Age : 40

Venom 1/2 wave SWR Issue Empty
PostSubject: Re: Venom 1/2 wave SWR Issue   Venom 1/2 wave SWR Issue Icon_minitimeSun Sep 26, 2021 12:35 pm

Thanks Victor,

Just a bit worrying when you hardly get the needle on the SWR meter move, I started questioning myself and the equipment.

I was turning lights off and moving things about trying to find what was causing the noise but I think I need to get the neighbours to move, no loss there as we don't get on anyway lol.
Back to top Go down
View user profile
SangueG
Major contributor
Major contributor
SangueG

Call Sign : 26-CT-3971 / M7TDV
Posts : 255
Times Thanked : 16
Join date : 2021-01-30
QTH or Location : Cirencester, Gloucestershire
Equipment Used : SS6900N, Xiegu G90, DX-300 for SWL, all antennas home-made

Venom 1/2 wave SWR Issue Empty
PostSubject: Re: Venom 1/2 wave SWR Issue   Venom 1/2 wave SWR Issue Icon_minitimeSun Sep 26, 2021 1:23 pm

Hi Bruce. Re the noise, I had a horrendous level of unwanted noise for a while earlier this year, but managed to get it to drop substantially, partially by just moving antenna slightly. If you've got the time and space you could try hiring or lowering it a little or moving it a few feet one way or another to see if it picks up less.

You can get a good low SWR over a wide band with the Silver Rods. Even if you don't they can still work well. Had one led flat once inside the loft hung from the rafters, SWR nearing 3:1 but still was able to work Europe when the skip was running. You should have good fun with yours next time the skips up Smile
Back to top Go down
View user profile
Sponsored content




Venom 1/2 wave SWR Issue Empty
PostSubject: Re: Venom 1/2 wave SWR Issue   Venom 1/2 wave SWR Issue Icon_minitime

Back to top Go down
 
Venom 1/2 wave SWR Issue
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: