I'd keep all instructions very brief. PLEASE READ BEFORE OPERATING. "The plate TUNE and LOAD controls are adjusted to transfer maximum power into the load. The TUNE control resonates the plate tank circuit <and then annotate that with a reference to the ARRL Handbook or some easy reference> while the LOAD control optimizes the match to your antenna system. It is important to keep tuning sessions brief. If you cannot tune the amplifier for maximum output power consistent with minimum grid current in ten seconds or less, you're likely taking too long and could damage amplifier components. Two things to look at while tuning up are output power and grid current. The objective of tuning is to generate the maximum possible output power consistent with the minimum possible grid current. This may seem counterintuitive, since grid current will peak when plate current dips, and that is an indication of tuning the plate tank circuit to resonance. However, two things that will help keep your amplifier linear and "clean," as well as preserve the life of all components including the tube(s): These are to moderate the drive power (from your transmitter) to the amplifier, and to always MAXIMIZE the LOADing for any given drive power. If you have a 100W transmitter (or transceiver) you'll likely find this amplifier can be driven to full output with less than that, or about 65 Watts. As such, you always want to use "full power" (as though you will be driving the amplifier to maximum output), even if you really intend to run much less than that. The only reason to ever tune the amplifier with less than "full power" drive is if you simply don't have that available, e.g., you only have a 10W or 20W transmitter. In such case, use the full power from the transmitter you have for all tuning. You must use a constant carrier for tuning; this can be "CW" with the key closed, or possibly using the RTTY or FM mode selection for your transmitter. You cannot accomplish tuning while using SSB. Key the transmitter and amplifier (as described in the previous section) and assure the XMT indicator illuminates. Apply drive power and watch RF output and Ig (grid current). Peak the PLATE and LOAD controls for maximum output power while also monitoring Ig to assure it never exceeds xxxx mA. If you see the Ig exceeds this level, simply reduce drive power from your transmitter until Ig is below xxxx mA. Then, peak PLATE and LOAD for maximum output power. Once this is achieved, increase drive power from your transmitter until Ig reaches xxxx mA. Increase LOADing by turning the LOAD control clockwise (higher index number on the front panel) and you will note Ig is reduced by that adjustment. Re-peak PLATE tuning for maximum output power. The objective is to peak output power using PLATE and LOAD controls, without ever exceeding xxxx mA Ig. It is best to "practice tuning" into a dummy load rated for the amplifier's output power. There is no reason to "tune up" for more than about ten seconds, as this is all the time it takes to do it properly. If you see Ig exceed xxxx mA, stop transmitting and turn the drive power down. With a proper LOAD (a dummy load or well matched antenna), Ig will never exceed xxxx mA when the amplifier is tuned for maximum output power. After you are familiar with the tuning adjustments and their interaction, you will find simply increasing LOADing (turning the LOAD control more clockwise) can often reduce Ig to the correct level without degrading the output power. That is the proper tune point: Where you achieve the maximum possible output power consistent with the minimum possible grid current. Using a dummy load (preferably) try tuning up on each band. Some bands will tune very "sharply," where a very small change in tuning adjustments creates a large change in output power, while some bands will tune "broadly," where a larger change in tuning adjustments hardly impacts output power. This is the nature of multi-band amplifiers which cannot be fully optimized for any single frequency, and is not unusual. Now, experiment with tuning (preferably into a good dummy load rated for the amplifier's output power) and keep a written record of the results on this chart:" FAQs: -"I can't get normal output with the grid current below xxxx. What do I do?" A: You either have a poor load attached, or you are underloaded. If you have a reasonable load, try turning the LOAD control more clockwise while watching grid current to see if that adjustment (increasing LOADing) brings the grid current down within range. If it does, re-peak the PLATE control and watch output power and grid current to achieve full output within rated grid current. If this is not possible, call 1-800-xxx for consultation." ...etc. I'd also index every single key word in the manual: ALC AMPLIFER ANTENNA SYSTEM DUMMY LOAD EFFICIENCY GRID CURRENT KEYING LINE VOLTAGE LOADING OUTPUT POWER PLATE CURRENT PLATE LOADING PLATE TUNING POWER CONNECTIONS POWER OUTPUT TRANSFORMER TAPS TUNING VOLTAGE etc. Whatever there is. No excuse for any kind of manual to not be indexed, especially when this task takes maybe an hour and makes a manual far easier to use.