VU2VWN - QRO Linear Amp using Tube "807"
....QRO 250W on 40M....140W on 20M ..

[ using 4 tubes in parallel ] diagram shows only 3 tubes .

Tap at half winding of Coils for 14 MHz tuning else ok for 7 MHz

Set Current at 25 mA per tube

400 mA 2.5mH RFC winding details

vu2vwn- Vasant.