![]() This difference is almost certainly not worth pushing hard-to-replace tubes to their maximum ratings. This might be a bit more linear distance on different receiver's meter scales, but it is only a bit over 1/6 of an S-unit. So, you are looking at a difference of about one needle width on the receiving station's S-meter. On my Collins S-line (typical example) the difference between successive S-units is about 4 to 5 meter needle widths. The normal standard for S-meters is 6 dB per S-unit. So, you are looking at a difference in dB of 1.14. How does this look on the receive end?ĭB = 10 * Log base 10 of P1 over P2. Let's suppose that you tune up for the maximum power you can get (assume 650 watts per Pete), and let's further suppose that the ham down the block running identical equipment tunes his amp up for 500 watts out. The receiving station probably won't notice any difference. ![]() ![]() I wouldn't push it hard unless you plan on replacing tubes frequently.
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