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The microprocessor runs a fine tune routine just after the tuner finds a match at an SWR of 1.5 or
less. This routine tries to get the SWR as low as possible (not just 1.5); it takes about a half
second to run. There is also a quick tune mode. If the SWR is below 2.0 when you press the tune
button to start a tuning cycle, the tuner will first try a memory tune routine to see if it can achieve
a low SWR without a complete re-tune. This also takes about a half second to run. If it does not
find a good match, then it runs a full tuning routine.
A Word About Tuning Etiquette
Be sure to use a vacant frequency to tune. With today’s crowded ham bands, this is often difficult.
However, do your best to avoid interfering with other hams as you tune. Your JT-11’s very short
tuning cycle, often only a fraction of a second, minimizes the impact of your tuning
transmissions. Tune at reduced power whenever possible; one or two watts is plenty.
Care and Maintenance
Your JT-11 tuner is maintenance-free. As with any modern electronic device, your JT-11 can be
damaged by temperature extremes, water, impact or static discharge. LDG strongly recommends
that you use a good quality, properly installed lightning arrestor in the antenna lead.
Technical Support
We are happy to help you with your JT-11. 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 prompt e-mail support is available at ldg@ldgelectronics.com.
Warranty and Service
Your JT-11 is warranted against defects in parts or workmanship for two years from purchase.
The warranty does not cover damage due to abuse or exceeding specifications. This warranty
applies to the original purchaser only; it is not transferable. A copy of the receipt showing the
purchaser’s name and the date of purchase must accompany units returned for warranty service.
All returns must be shipped to us pre-paid; we will not accept units with postage due. A return
form is provided on our web site for your convenience.
If you need to return your JT-11 to us for service, package it carefully, keeping in mind that we
will re-use your packaging to return the unit to you. Download the return form from our web site
(ldg@ldgelectronics.com), fill it out and return it with your tuner. A self-addressed return-
shipping label, while not required, will help insure speedy and accurate delivery of your repaired
unit. Include a full description of the problem, along with your name, address and a phone
number or e-mail address where we can reach you with any questions. Repairs average about 3 to
6 weeks.
We will be glad to service your JT-11 after the warranty period has ended. We will notify you of
repair charges by phone or e-mail, and bill you after repairs are completed.