1. The dual-section power supply capacitor is relocated to the board.
2. The power supply filter capacitor values are increased for better filtering.
3. The 0B2 tube is replaced with solid state parts.
4. Trimmers are added to make calibration easier.
5. A current-sensing resistor has been added to the meter path.
This is a new replacement board. It is similar to the original but has been improved and redesigned in a number of ways. This is a super-high-quality circuit board; it is unbelievably nicer than the originals. You will want to mount the 12AU7 socket sideways on the edge of the board and run wires down to the board.
This board is designed to use modern parts, and is marked (and sized) for them. The board is marked with part specs so it's easy to install new parts. I do have a parts list to populate a board--it is at the bottom of this listing. Resistors are not on the list, sorry. The board is marked with the resistor specs--if no wattage is specified, it's a 1/2W resistor. You will need to build this out yourself--it is obviously not complete, and I do not have complete boards available. This is fairly advanced-level work.
This board is designed to use modern parts, and is marked (and sized) for them. The board is marked with part specs so it's easy to install new parts. I do have a parts list to populate a board--it is at the bottom of this listing. Resistors are not on the list, sorry. The board is marked with the resistor specs--if no wattage is specified, it's a 1/2W resistor. You will need to build this out yourself--it is obviously not complete, and I do not have complete boards available. This is fairly advanced-level work.
Just FYI, R23 on the board is marked 270 ohms like the original. The parts list suggests a 500-ohm trimmer for R23, since they don't really make 270-ohm trimmers and a 500-ohm will work fine there.
BOM Parts List (resistors are NOT on the list):
US shipping and handling is $5, and international is $18, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.
BOM Parts List (resistors are NOT on the list):