12-20-2013, 12:50 PM
Hi
This is the solid state inverter I use a fair bit. It works well, you will have to play with values of the capacitors as the waveform/frequency is partially dependent of the inductance of the transformer and the capacitors. The power transistors TIP3055 will not run hot if you get a good waveform. This arrangement can be fitted into the old can of the vibrator. Be careful to get the correct pin connections on the vibrator. Simple to make and very reliable. You can model this using Ltspice or similar, for modelling purposes make sure that the resistor values are all slightly different but within say 5% tolerance, if you don't do this then the circuit will not oscillate. The 20uF caps shown in the circuit are what I used in this instance
I seem to recall that the switching frequency of a Mallory Vibrator is appx 40Hz, when in circuit in the BV611 the vibrator give about 45Hz.
Let me know how you get on
Cheers
Richard
PS If you are interested I will post a very simple 1 transistor HT power supply design, that draws 'zero' current when there is no load.
This is the solid state inverter I use a fair bit. It works well, you will have to play with values of the capacitors as the waveform/frequency is partially dependent of the inductance of the transformer and the capacitors. The power transistors TIP3055 will not run hot if you get a good waveform. This arrangement can be fitted into the old can of the vibrator. Be careful to get the correct pin connections on the vibrator. Simple to make and very reliable. You can model this using Ltspice or similar, for modelling purposes make sure that the resistor values are all slightly different but within say 5% tolerance, if you don't do this then the circuit will not oscillate. The 20uF caps shown in the circuit are what I used in this instance
I seem to recall that the switching frequency of a Mallory Vibrator is appx 40Hz, when in circuit in the BV611 the vibrator give about 45Hz.
Let me know how you get on
Cheers
Richard
PS If you are interested I will post a very simple 1 transistor HT power supply design, that draws 'zero' current when there is no load.
