Hi,
Is there a method for obtaining the number of turns for a given
diameter for the antenna choke ? (I am not sure if this will be simple
air-core coil formula or "suck it and see" type arrangement).
ie. I have a sleeve antenna at 915MHz constructed from RG316 coaxial
cable. It is fed up the centre of 1/4" nylon tubing. I want to create a
choke at the feedpoint from the RG316 wound around the outside of the
1/4" tubing but not sure of how many turns would be required.

Thanks in advance

Regards

David

"David" wrote in message
...
Hi,
Is there a method for obtaining the number of turns for a given
diameter for the antenna choke ? (I am not sure if this will be simple
air-core coil formula or "suck it and see" type arrangement).
ie. I have a sleeve antenna at 915MHz constructed from RG316 coaxial
cable. It is fed up the centre of 1/4" nylon tubing. I want to create a
choke at the feedpoint from the RG316 wound around the outside of the 1/4"
tubing but not sure of how many turns would be required.

Thanks in advance

Regards

David

How about a ferrite choke?
73
H.

For design of solenoid chokes wound with coax cable, download program
SELFRES3 from website below.
--
.................................................. ..........
Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
.................................................. ..........

Thank you.

Reg Edwards wrote:
For design of solenoid chokes wound with coax cable, download program
SELFRES3 from website below.
--
.................................................. .........
Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
.................................................. .........

Dave, please tell me whether you ran the program OK.

The numbers are correct but I was not happy with the introductory
notes. Did they make sense to you?
----
Reg, G4FGQ

"David" wrote in message
...
Thank you.

Reg Edwards wrote:
For design of solenoid chokes wound with coax cable, download
program
SELFRES3 from website below.
--
.................................................. .........
Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
.................................................. .........