--- "Steve Bosshard (NU5D)" <[EMAIL PROTECTED]> wrote:
> There is a formula in most hand books where the > characteristic impedance can > be determined from the inner diameter of the shield > and the outer diameter > of the center conductor. I have built many > makeshift connectors using an > UHF barrel, PL258, and slotting the outer conductor > of the cable with a > hacksaw, then driving the barrel over the center, > applying passivating > compound, and using a hose clamp to secure the > shield to the barrel > connector. I have used UHF barrels on 1/2" and 3/4" > lines with good > success. Also there is not a whole lot of > difference between 50 and 75 ohm > cable. > > Also, for a given diameter, the loss is pretty much > the same with some > difference due to dielectric losses. > > Steve > For most frequencies coax is used at it is not the dielectric loss that is the major loss, but the loss in the conductors. Mostly the center conductor as it is the smalest RF conductor. Differant dielectrics usually let you use a larger center conductor for the same outer conductor diameter to keep the impedance. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
