doubles voltages http://www.reconnsworld.com/forum/list.php?15 Tue, 18 Jun 2013 19:45:33 -0400 Phorum 5.2.9a http://www.reconnsworld.com/forum/read.php?15,35,35#msg-35 http://www.reconnsworld.com/forum/read.php?15,35,35#msg-35

High Voltage Current Amplifier.

Power transistors are used throughout the high voltage current amplifier to dissipate heat. The input and output transistors should be attached to the same aluminum to equalize temperatures and minimize drift in Ioq. The current sources do not have to be attached to aluminum.

The power transistors can be attached to a plate with the boosters. With the plate shown, the p.c. board is above the plate, with wires extending over the edge for attachment to the transistors. The copper side is down. An over-wattage mechanism can be crammed onto the same board, with careful designing. The plate is attached to the back panel for cooling.

The voltage across the protection resistor is 0.50V (6 amps) at cut in, depending upon the nature of the protection diodes.]]> andrew Voltage Doublers Fri, 27 Jun 2003 11:54:37 -0400 http://www.reconnsworld.com/forum/read.php?15,7,7#msg-7 http://www.reconnsworld.com/forum/read.php?15,7,7#msg-7

parts:
U1 NE555 timer IC
R1 2.2k ohm resistor
R2 15k ohm resistor
C1 0.01 uF ceramic capacitor
C2, C3 220 uF electrolytic capacitor
C4 470 uF electrolytic capacitor
D1, D2 1N4002 diode

all resistors are 5 or 10 percent tolerance, 1/4-watt
all capacitors are 10 percent tolerance
this circuit rougly doubles the voltage of the input, however the current output is low. doubled output is at 'V source.']]> andrew Voltage Doublers Fri, 05 Jan 2007 03:19:25 -0500