cliff wright wrote:
Hi! I've been wanting to upgrade my old Zmatch ATU which is 30 years
old for a while but although I've come across several designs, both one
and 2 coils I cannot find the actual inductance values required.
I seem to remember an article in a magazine some years ago that had them
but I haven't been able to locate it so far.
I have some very nice Silver plated coil stock that I would like to use
but as I have determined for myself the value of the coil is critical
as the network doesn't like the tuning position for any 2 bands to
coincide.
Failing the use of an air cored coil I might try a Toroid, but The coil
stock is in my hands right now. Any help greatly appreciated!
Regards Cliff Wright ZL1BDA ex G3NIA

See VK5BR's website:
http://users.tpg.com.au/ldbutler/SingleCoilZMatch.htm


--

73 from Ian GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek