| A hot 6C33 tube! |
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| Test at night in
the dark. |
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| Amplifier model
one (not mirrored). You find schematic in PCB file. |
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PCB file updated 2005.09.25 |
| Amplifier model
two (mirrored) |
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PCB file updated 2005.09.25 |
The power supply. We have had some trouble with the regulated power supply and
have decided to build a simple version, this is the new one. The old version made to much hum, this one is better.
You find schematic in PCB file.
|
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PCB file updated 2005.09.25 |
| We have chosen a
1627 Lundahl transformer in single ended configuration running at 200mA. |
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| Transformer
primary pcb |
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PCB file updated 2005.09.25 |
| Transformer
secondary pcb |
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PCB file updated 2005.09.25 |
|
Updated!
The control board schematic. |
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|
PIC 18F452 control board, controlling and monitoring the amplifier.
|
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PCB file updated 2007.01.20 |
| Underside
of the PIC control board, reinforced with extra copper wire to withstand
approx. 15 Ampere (6C33 filament and idle current approx. 2x200mA
@ 210V) |
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|
| PIC 18F452
program structure in pdf format. |
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| PLED display pcb |
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PCB file updated 2005.09.25 |
| Testing the control PLED display, used to display amplifier status (current,
voltage, four individually tube hour/minute usage counters, on/off
operations and temperature inside the case). |
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|
| My planned layout. |
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|
| My planned layout
in pdf format. |
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| My brothers
planned layout |
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|
The inside of my
brothers amplifier. Notice the placement of two signal cables, we had to
do some trail and error to minimize hum. We have placed the amplifier
pcb's in the corners and the signal cables make a loop, but it is
possible to balanced out the hum.
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|
| The finished
amplifier. We both choose a beeswax oak wood frame as the enclosure, a
bit expensive, but we are very pleased with the results. We have
thermometer on the PIC pcb and the maximum temperature inside the case
is approx. 52°C, so this is a hot amplifier. |
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| CAD files for the cabinet. |
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CAD files updated 2007.06.18 |
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Updated!
The front LCD schematic. |
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| New! As my second PLED
display broke down, we decided to switch to our standard blue and white
LCD display. |
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| New! Here are the pcbfiles
for the blue and white LCD display. |
|
PCB files
updated 2009.12.26 |
| New! The CAD file for the new
front and a pdf showing the layout. |
|
CAD file
updated 2010.02.17 |
