Klaus, I started a thread on it a while back.
http://www.diyaudio.com/forums/tubes-valves/268043-3-x-3-tube-amp-30-watts.html
http://www.diyaudio.com/forums/tubes-valves/268043-3-x-3-tube-amp-30-watts.html
Last edited:
The two power supplies of the single ended hybrids are already assembled and contain a lot of Swedish iron. When I switched it on the first time I was seriously impressed for it was deas quite, no hum, no vibration, just plain quite with all voltages standing. I also was surprised that the simulations matched the real life voltages and currents within the limits of the component tolerances. LT spice is truly a great help.
Attachments
BJT 's are more linear in the on range and have lower c-b capacitances so are better for VAS stages. Mosfets however are much better power switching devices as they don't latch up and have a softer turn on / off characteristic.
I set the 3 * 3 amp so that the BJT's are always on.
I used them here as the BJT will draw current from the 6922 respective of load
The 12AX7 rolls off from miller effect well before the 6922 & MJE13007 setup
I set the 3 * 3 amp so that the BJT's are always on.
I used them here as the BJT will draw current from the 6922 respective of load
The 12AX7 rolls off from miller effect well before the 6922 & MJE13007 setup
Last edited:
My finalized single-ended hybrid project can be found here:
http://www.diyaudio.com/forums/tubes-valves/71300-photo-gallery-792.html#post5082409
Regards
KlausB
http://www.diyaudio.com/forums/tubes-valves/71300-photo-gallery-792.html#post5082409
Regards
KlausB
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Tubes / Valves
- SuperTriode with BJT and MosFet - a good idea?