Old RTTY 88mH inductors might be suitable if you can find them. or an automible ignition coil. My approach is different. I prefer to engineer/design the tx/pa for 50 ohms, feed this rf to the base of
The most efficient and simple method of arriving at a required inductance for a PA application is to use a tapped coil, this way you get exactly the amount ot L needed. Other methods like variometers
Hi All Ref recent articles about burnt out coils. If possible only use single layer coils ie do not pile wind except there is no alternative. Pile wound coils handling high voltages ultimately burn u
