ARRL

Forum Home - Rules - Help - Login - Forgot Password
Members can access, post and reply to the forums below. Before you do, please first read the RULES.

Most effective tuner location

Feb 1st 2013, 20:31

k4lxx

Joined: Dec 29th 2009, 16:28
Total Topics: 0
Total Posts: 0
I am operating a 746Pro at 100 watts through approximately 80 feet of coax into an Icom AH-4 tuner, feeding a Windom HSQ antenna at 45 feet. While this appears to work just fine, I have wondered if it is any more effective than using a tuner placed indoors and next to the transceiver. The reason I am curious is that the cost of an outdoor tuner able to handle more power, should I wish to add an amplifier, is substantially greater than a suitable indoor one. Is the cost warranted due to some improvement in performance?
Feb 2nd 2013, 03:27

AA6E

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
The simple answer is that it may not matter very much for your setup. If you're feeding an unbalanced antenna, like a vertical, against radials, you'd generally like to have the tuner at the feed point to minimize losses. For a coax-fed or twin-lead fed resonant antenna, it usually won't matter. If you're operating a non-resonant antenna (high SWR), you can have a situation where you can only match the antenna easily with certain feed line lengths. (The feed line acts as a transformer.)

73 Martin AA6E
Feb 2nd 2013, 16:10

k4lxx

Joined: Dec 29th 2009, 16:28
Total Topics: 0
Total Posts: 0
Thank you, you were very helpful. It also explains why I could tune my dipole on 180 meters when the tuner was next to the transceiver, but not when located close to the feed point.

73 Gary K4LXX

Back to Top