VE3XE,
A form with carbon in it will 'cancel' the affect of an coaxial choke? Oh, I don't think so. In fact, it would enhance it's inductive reactance, make it more effective. It won't make a very significant difference either way in practice though. Now, if that carbon was one of the ferrite mixes, it could make a significant increase in the inductance of that 'coil'. Ferrite 'beads' used on the coax is another way of stripping CMCs from the feed line, right? But then, a coaxial choke is just a 'cheap', quick-n-dirty way of doing that stripping without the extra weight/cost of ferrite. That 'slug' in a variable coil is just one way of making 'smaller' changes (tuning) a coil. That'd be a nice feature for a choke, but adding/subtracting a turn or two would do the same thing.
- 'Doc
(Oh! And paint that choke pink! What self respecting electron would wanna have to go through that??)
A form with carbon in it will 'cancel' the affect of an coaxial choke? Oh, I don't think so. In fact, it would enhance it's inductive reactance, make it more effective. It won't make a very significant difference either way in practice though. Now, if that carbon was one of the ferrite mixes, it could make a significant increase in the inductance of that 'coil'. Ferrite 'beads' used on the coax is another way of stripping CMCs from the feed line, right? But then, a coaxial choke is just a 'cheap', quick-n-dirty way of doing that stripping without the extra weight/cost of ferrite. That 'slug' in a variable coil is just one way of making 'smaller' changes (tuning) a coil. That'd be a nice feature for a choke, but adding/subtracting a turn or two would do the same thing.
- 'Doc
(Oh! And paint that choke pink! What self respecting electron would wanna have to go through that??)