Advertisement
- 5 -
Even though the Z11 will match a very wide variety of antennas and frequency bands, achieving a
match far from resonance is very inefficient; much of your transmitter's power will be dissipated in
the tuner, never reaching the antenna. For best results, your antenna should be as close to
resonance as circumstances permit.
The Z11 will match some balanced or random wire antennas connected to the SO-239 output jack,
but again, it will be somewhat inefficient. For best results, balanced and random wire antennas
should be fed through a balun such as the LDG RBA-1.
The tuning bandwidth of the Z11 (usable frequency excursion before exceeding a 1.5 SWR) varies
considerably with frequency band, ranging from about 75 kHz on 80 meters, to about 400 kHz on
10 meters. In Auto mode, the Z11 will automatically retune as necessary when you transmit a
carrier after changing frequency.
One Touch Tune (OTT) Operation: The Z11 can also be interfaced to directly control an FT-817.
The One Touch Tune interface from W4RT Electronics (www.w4rt.com) can be purchased
separately. With the OTT installed, the user simply presses the tune button the Z11 and the OTT
sends a command to the 817 to transmit a carrier while the tuner is tuning. While not required for
operation with the FT-817, the OTT makes changing bands and re-tuning a snap.
Care and Maintenance: Your Z11 tuner is essentially maintenance-free, and rugged enough for
normal field use. The outer case may be cleaned as needed with a soft cloth slightly dampened in
household cleaning solution. As with any modern electronic device, the Z11 can be damaged by
temperature extremes, water, impact or static discharge.
Technical Support: We are happy to help you with your Z11. Telephone technical support is
available at 410-586-2177 weekdays from 9 am to 5pm Eastern time. Inquiries by Fax at 410-586-
8475 are welcome, and e-mail (ldg@ldgelectronics.com) is answered daily when practical.
Advertisement
