Instruction manual

AL-800 Instruction Manual
12
An accumulation of gas (or stray debris) in the tube can cause the tube to arc between the anode and
the other elements of the tube. The resulting "gas arc" will generally manifest itself as a loud "pop"
when the amplifier is first turned on, or during conditions of high anode voltage. A "gas arc" will
often damage diode D117 on the negative rail of the filter capacitor bank and open the fuses in the
amplifier. If this problem occurs frequently, the tube should be tested or replaced. The use of low
quality tubes, tube that have been stored for extended periods, or abused tube will increase the
likelihood of a "gas arc". Ameritron recommends using only current code date Eimac 3CX800A7
tubes.
Export Modifications
A simple modification will allow operation on frequencies above 15 meters. Instructions for this
modification are available by sending a written request for "Export Modification Instructions" along
with a copy of a valid amateur license. There is no charge for this information. Export models are
shipped with this modification installed and have an "X" or "Y" following the serial number.
Standard frequency ranges are indicated in the chart on page 32.
Technical Assistance
Technical assistance is available during normal central standard time business hours on weekdays.
Customer service is more effective when our engineers are provided the following information:
1. Model and serial number
2. Date of purchase and dealer
3. An accurate description of the problem
Meter readings at all stages of the tuning procedure are very important along with a complete
description of the other equipment used with our product.
Written assistance is also available. Due to time delays in processing mail, please allow at least
three weeks for a written reply. For service or written correspondence, use the following address:
AMERITRON
116 Willow Rd.
Starkville, MS. 39759
Telephone [phone]
FAX [phone]
Note: Service history has clearly shown that most problems are operating or installation errors,
rather than equipment failures. Most problems can be resolved over the telephone.
Please contact our staff before shipping parts or equipment to us.
The packing materials used to ship this amplifier were specially designed to prevent shipping
damage. The original packing materials should be used to ship this amplifier. Replacement packing
materials may be purchased from Ameritron if original packing materials are unavailable or
damaged.