[ftp]Hello and sorry for my bad english. This is my first message here.
The power supply of my unit has +5V, +12V & -12V outputs, but only +11V & 11V are developped. So, the output at 20Vpp is slightly cutted in open ouput and the same at 8Vpp about 50 ohm load.
I thought rise turns number of +-12V coils, but this is hard and dangerous (transformer broke).
Finally, I changed the schottky diode of +5V output for a series group of four similar schottky diodes. This action rise voltage of +5V coil (not in the +5V out) in 1V aproximately and proportionaly in +-12V coils.
The ouput in +-12V outs is +-13V now and ouput in open circuit reach 20Vpp and 11Vpp about 50 ohm without problem.
More diodes rise more voltage but this could be dangerous for the output opamps. I reached +-18V but I went backwards.
The supply runs at 330KHz and is good idea to use only scottky diodes for this mod in +5V out.
The trigged output of certain number of pulses on main output (burst) is ok for peak audio power of amplifiers.
TTL out have very small rise time and is ok for longitude and impedance tests in transmission lines (TDR) with 1MHz and 1% duty.
Javier Muriedas (EA1AWY)