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Again there seems to be a bit of confusion over average power and pep power ratings. About the only thing I can think of off hand that is rated in average power is coaxial cable. Everything else seems to be rated in pep.In reality a manufacturer can rate something for almost whatever he wants within reason. Where the idea of average ratings were one half that of pep however is beyond me. MFJ rates their stuff in pep so you have to remember that the true pep power is only rarely ever hit if things are adjusted properly. there is no way i would run 1500 watts into a tuner rated for 1500 watts as there are far too many variables that can derate that.Weird impedance's, especially really low impedance's with lots of reactance can REALLY derate the power rating of a tuner. Above I mentioned about literally burning up a Ten-Tec 200 watt tuner while running only 100 watts pep. the type of switch used on the inductor plays a big role in rating as well. A nice ceramic switch with large contacts and wide spacing is great. Avoid switches with plastic parts. Bread slicer type capacitors MUST have a strap across the rotor bearing as the bearing will severely limit the current capability of the capacitor. Vacuum variables are vastly superior for this application however they are vastly more expensive.

<blockquote data-quote="Captain Kilowatt" data-source="post: 515514" data-attributes="member: 39"><p>Again there seems to be a bit of confusion over average power and pep power ratings. About the only thing I can think of off hand that is rated in average power is coaxial cable. Everything else seems to be rated in pep.In reality a manufacturer can rate something for almost whatever he wants within reason. Where the idea of average ratings were one half that of pep however is beyond me. MFJ rates their stuff in pep so you have to remember that the true pep power is only rarely ever hit if things are adjusted properly. there is no way i would run 1500 watts into a tuner rated for 1500 watts as there are far too many variables that can derate that.Weird impedance&#039;s, especially really low impedance&#039;s with lots of reactance can REALLY derate the power rating of a tuner. Above I mentioned about literally burning up a Ten-Tec 200 watt tuner while running only 100 watts pep. the type of switch used on the inductor plays a big role in rating as well. A nice ceramic switch with large contacts and wide spacing is great. Avoid switches with plastic parts. Bread slicer type capacitors MUST have a strap across the rotor bearing as the bearing will severely limit the current capability of the capacitor. Vacuum variables are vastly superior for this application however they are vastly more expensive.</p></blockquote><p></p>

[QUOTE="Captain Kilowatt, post: 515514, member: 39"] Again there seems to be a bit of confusion over average power and pep power ratings. About the only thing I can think of off hand that is rated in average power is coaxial cable. Everything else seems to be rated in pep.In reality a manufacturer can rate something for almost whatever he wants within reason. Where the idea of average ratings were one half that of pep however is beyond me. MFJ rates their stuff in pep so you have to remember that the true pep power is only rarely ever hit if things are adjusted properly. there is no way i would run 1500 watts into a tuner rated for 1500 watts as there are far too many variables that can derate that.Weird impedance's, especially really low impedance's with lots of reactance can REALLY derate the power rating of a tuner. Above I mentioned about literally burning up a Ten-Tec 200 watt tuner while running only 100 watts pep. the type of switch used on the inductor plays a big role in rating as well. A nice ceramic switch with large contacts and wide spacing is great. Avoid switches with plastic parts. Bread slicer type capacitors MUST have a strap across the rotor bearing as the bearing will severely limit the current capability of the capacitor. Vacuum variables are vastly superior for this application however they are vastly more expensive. [/QUOTE]

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