I have done it using motorized matched roller inductors and capacitor
controlled by a PIC. It is built into an old Tempo-1 cabinet and works
great at over 500 watts (limited by my little amp). It is in constant
communication with my K3 and auto-tunes from memory as bands or frequency is
changed.
I have not yet uploaded any pictures of this tuner to my web page but if
anybody is curious then I could do so.
What power level are you running? Below a hundred watts or so you can use
relays to switch in pairs of inductors and / or a range of capacitors. I
have done that also and it is a much faster tuning system and mechanically
more simple .. but it is also a lot more fragile.
Don K7FJ
T
----- Original Message -----
From: "David Andrews" <[EMAIL PROTECTED]>
To: <elecraft@mailman.qth.net>
Sent: Wednesday, August 20, 2008 6:27 AM
Subject: [Elecraft] Auto balanced tuner
I'm using a h/b 1930's link (balanced) tuner. It's as efficient as I can
get, and open wire feeders closely balanced. What I'd really like is the
same automated, either using motorised variable caps or switched
caps/inductance. Has anyone any links or have they managed it themselves?
David G4CWB (K3)
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
