Pignose Legendary 7-10 value?
Thanks, Chris, impressive work. I would ask you that, someday, when possible, you inject, say, 100Mv (or whatever´s necessary) at 1Khz (200 Hz is a bit low) to make the output just clip, and measure some voltages. The voltages at the speaker´s terminals give us the real power (hype says 5 W RMS which would be unbearably loud in a dorm and murder batteries; i guess more like 1 W RMS , based on battery life); and across different windings give us transformer ratios, very useful.
Thanks.
Thanks.
- teemuk
- Breadboard Brother
One schematic version:
http://www.schematicx.com/images/schema ... am-big.gif
There's many variations of this, though. Some use mainly PNP transistors and negative voltage supply, some use mainly NPN transistors and positive voltage supply. There were at least few different variations of the bias of the final stage and I can't remember from top of my head if there were also germanium and silicon versions. Point is, persistent search will find at least a handful of schematics where transistors and component values slightly vary. Pick your poison.
http://www.schematicx.com/images/schema ... am-big.gif
There's many variations of this, though. Some use mainly PNP transistors and negative voltage supply, some use mainly NPN transistors and positive voltage supply. There were at least few different variations of the bias of the final stage and I can't remember from top of my head if there were also germanium and silicon versions. Point is, persistent search will find at least a handful of schematics where transistors and component values slightly vary. Pick your poison.
Hi All!
I try to replicate the Pignose & have some questions.
1. What data of output transformer? Wire diameter in mm & turns?
2. Where can I see the PCB?
P.S. I was calculate first coupling transformer, it's data:
wire diameter 0.11 mm
first coil - 780 turns
second coil 2x405 (810) turns
Thank for Your answer from cold Ukraine
I try to replicate the Pignose & have some questions.
1. What data of output transformer? Wire diameter in mm & turns?
2. Where can I see the PCB?
P.S. I was calculate first coupling transformer, it's data:
wire diameter 0.11 mm
first coil - 780 turns
second coil 2x405 (810) turns
Thank for Your answer from cold Ukraine
Hello from years ago. I just measured the transformers in a newer-ish Pignose (pcb date is from 2014) and they are as follows:
Driver Transformer:
Primary 60ohm
Primary CT 30hm
Secondary 45ohm
Output Transformer:
Primary 8ohm
Primary CT 4ohm
Secondary 1.3ohm
Secondary CT .3ohm
Photos:
Driver Transformer:
Primary 60ohm
Primary CT 30hm
Secondary 45ohm
Output Transformer:
Primary 8ohm
Primary CT 4ohm
Secondary 1.3ohm
Secondary CT .3ohm
Photos: