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Re: More primary L needed

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

An alternative to using an off axis inductor to lower the primary frequency is to increase the secondary frequency to match the primary (or at least get it within tuning range)

Gerry R.

Original poster: "Mike Tucknott" <michael.tucknott@xxxxxxxxxx>

Hi All

I`v done the calc and I`v found that I need more primary to get the system to tune. OK so adding more primary C is not an option also there is no room to add an extra turn on to the primary, so I built a small inductor out of 14 turns of thick insulated copper wire about 3" dia in the centre is a soft iron core made up of ferrous rods.

This plus the primary coil give just over the required inductance.

What are peoples thoughts on this ? method and construction.

Cheers Mike

Smokin in south Oxfordshire UK