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With 811A tubes, while using CW, FM, or RTTY modes for tuning, always limit transmitting time to no more than 5-seconds transmit with a 15-second cool down.

You may not know the actual power but, with care, the amplifier can still be properly tuned for peak. Be aware that many meters do not read correctly, especially for peak power.Īccurate or not, almost all meters are usable for finding maximum power.

A wattmeter connected to the amplifier output (this can include the RF power meter in an antenna tuner) must be used to properly tune an amplifier.

Tuning takes some practice but is something we must learn if we want good amplifier life and a clean signal.

Short of using a tuning pulser, there is no easy correct two-step or three-step tuning process. Previous supplemental instructions also result in improper tuning, that while increasing tube life, also increase splatter. Previous supplemental instructions can result in re-tuning when it is not necessary. Some previous supplemental procedures issued do NOT properly tune the amplifier. This procedure omits as much as can possibly be omitted and still properly tune the amplifier. Unfortunately, every step is necessary for proper amplifier operation, and we have carefully removed all unnecessary steps. Ameritron 10 Meter Mods Pdf Converter Free We wish amplifier-tuning instructions could be shorter. Reading all manual tuning steps and “dry practicing” (without actually transmitting) all manual tuning steps will make initial operation much easier and safer. Occasionally, first-time amplifier owners have difficulty understanding manual tuning instructions. The difference in power supply voltages on voice and carrier modes is the major contributor to differences in peak power between voice and carrier modes. The AL-811 is rated at 600-watts PEP voice, or just over 400-watts carrier in normal CW modes. The AL-811H is rated at 600-watts CW carrier in normal CW or tune. The AL-811H is rated at 800-watts PEP voice on a good peak reading meter. Pleasures and Pitfalls of Linear Amplifiers 4-8-10 FINAL.ppt Author: rhiller.ĪL811H and 811 tuning supplement Supplemental Tuning Instructions Please take time to read! The first step is to understand the power ratings. Measures mod’s and soft-start tubes last longer (x8).Tuned Input Matching Networks Transistor Amps.First word of advice - donu0027t use the amp all the. Ameritron 10 meter mods PDF download.ALS-600 ALS-500M 10 Meter Modification This kit contains a ten-meter board and this instruction sheet. Including: ameritron adl 2500, ameritron al 80b, ameritron al84man, ameritron al 572, ameritron al 800, ameritron al 800h, ameritron al 811, ameritron al 811h, ameritron als 500m, ameritron arb 700, ameritron arb 702, ameritron arb 702i2, ameritron arb 702i, ameritron atp 100, ameritron atp 102, ameritron atr 30, ameritron awm 30, ameritron icp.