QRO

I collect an old QRO transmitter with 6883 valve. Problem with power supply. I wound a new transformer having 500v 250ma, 250v 150ma, 6.3v 3A, 12.6v 5A. Now the power supply unit working fine. I connected relay to control the HV. For this relay seperate regulated 12v dc required. Can use the same volt line in the tx unit.

My vwn qrp and 830 linear

At last i decided to correct my OLD vwn qrp and irf830 linear. i succeeded in qrp, it is working fine. but fellow hams hesitate to try hard to catch my small signal. this means i need power amplifier, hope it will be fine with irf 830. i searched i found my old linear box. now problem is with the tank coil, i lost the irf 830 circuit, i dont know dimension of the tank coil. mmmmmm,