teddy_pardo
Trade: Teddy Pardo
Following the TeddyReg and as a results of many nights and weekends of experiments, here comes the PowerTeddyReg. It is based on the same concept but can deliver several amperes (depending on selected dropout and heat sink) and has much lower output impedance.
Here is the circuit
Components are
R1 = 3.4K
R2 = 150R
R3 = 40-60K
R4 = not required
R5 = 40-60K
R6 = 100-250R
C1 = 0.1uF X7R Ceramic (optional)
C2 = 10-20uF Tantalum
C3 = 10-20uF Tantalum
C4 = 33uF Tantalum
C5 = 0.2-0.3uF X7R Ceramic
C6 = 10-20uF Tantalum/Oscon
T1 = SK117 GR
T2 = BC550C
T3 = D45H11
LR1 = LM317
Note that with a FET transistor and Sziklai-pair the dropout on the VBE is minimal (less than 1Volt) therefore the output voltage is mainly determined by the LM317.
This regulator can be used for power amplifiers and the effect it has on the gainclone is quite astonishing. I have used a pair of these regulators (positive and negative) per channel, powered by a single 120VA transformer and cheapo miniature 10.000uF capacitors. Results are jaw dropping, it's comparable if not superior to many high end power amps discussed in this forum including my own one.
A complete one-channel power amp including heat-sink, two regulators, and a trimmed GainClone PCB can fit in a 6x6x6 cm module. Isn't it cute?
My next project: a miniature active cross over using these modules. Stay tuned...
Enjoy, Teddy
Here is the circuit
Components are
R1 = 3.4K
R2 = 150R
R3 = 40-60K
R4 = not required
R5 = 40-60K
R6 = 100-250R
C1 = 0.1uF X7R Ceramic (optional)
C2 = 10-20uF Tantalum
C3 = 10-20uF Tantalum
C4 = 33uF Tantalum
C5 = 0.2-0.3uF X7R Ceramic
C6 = 10-20uF Tantalum/Oscon
T1 = SK117 GR
T2 = BC550C
T3 = D45H11
LR1 = LM317
Note that with a FET transistor and Sziklai-pair the dropout on the VBE is minimal (less than 1Volt) therefore the output voltage is mainly determined by the LM317.
This regulator can be used for power amplifiers and the effect it has on the gainclone is quite astonishing. I have used a pair of these regulators (positive and negative) per channel, powered by a single 120VA transformer and cheapo miniature 10.000uF capacitors. Results are jaw dropping, it's comparable if not superior to many high end power amps discussed in this forum including my own one.
A complete one-channel power amp including heat-sink, two regulators, and a trimmed GainClone PCB can fit in a 6x6x6 cm module. Isn't it cute?
My next project: a miniature active cross over using these modules. Stay tuned...
Enjoy, Teddy