I putting together breadboard for VCA for modular synth
Pentode or tetrode I guess
Will have drive control and CV inputs
Needs to be small
Looking at CV4014/EF91 for starters....
Which is 7pin :/
Ideas welcome
Dave
+/-15v psu for modular synth. Valve recommendations please
-
- User
- Posts: 69
- Joined: Mon Jul 21, 2014 7:50 am
- Location: The Black Country
#4
ECC86 is designed for low voltages, Va max = 30V, triode though,
Cheers, Alan
Cheers, Alan
-
- Amstrad Tower of Power
- Posts: 10552
- Joined: Wed May 30, 2007 12:25 am
- Location: South Yorks.
#5
Don't know if this will help Dave, but you could have a look here.
http://www.junkbox.com/electronics/lowv ... ubes.shtml
Interesting reading.
Gives or could give a whole new dimension to active preamps
Who's gonna be first to have a go.
http://www.junkbox.com/electronics/lowv ... ubes.shtml
Interesting reading.
Gives or could give a whole new dimension to active preamps
Who's gonna be first to have a go.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
- Mike H
- Amstrad Tower of Power
- Posts: 20157
- Joined: Sat Oct 04, 2008 5:38 pm
- Location: The Fens
- Contact:
#6
Yes verrry interestinkIf you're using a conventional tetrode or pentode in space-charge mode, make sure you put 12V on the control grid, and use the screen grid as the control grid. Pentode suppressor grids are almost always tied internally to the tube cathode, but if the suppressor grid comes out separately to a pin, try putting 12V on the suppressor as well. This may allow greater gain in some circuits, as you have two grids accelerating electrons toward the weakly charged plate.
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."