While I acknowledge the discussion is regarding choice of toroids for an AMU project.

QRP Labs / Hans, Points out that his LPF design is suitable UP TO 5 watts as supplied in his kits.
See bottom section of the web page


Alan

On 11/01/2018 17:05, K9HZ wrote:

Not sure what brought this on but the teaching point of my post for those who would otherwise make current, voltage, saturation calculations for Inductors in RF service and build from them is to prototype first. ?My recollection in relation to Hans Summers LPF kits (nothing to do with my tuner design) is that guys are using them in amplifiers up to 100 watts... and i wonder if they have had the parts on the bench to really see the limitations of the filters. ?More clear?

Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

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Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

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Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it:

email:??bill@...

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On Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io <nd6t_6@...> wrote:

Bill, Before you get too invested in small toroids consider that the tuner must deal with higher currents than an LPF. Saturation results from current, not power. 100 watts and high impedance ratios requires larger cores. Best to do the math before ordering. 73, ND6T