I start to put all components & batteries into the new case. The sub-miniature tube will be the 6112, its characteristic is very similar to the 12AX7.
The pcb is very small in size, and I'm afraid I don't have space for the 2nd -ve bias battery. So I'll need the inverter NE555 circuit to generate the -ve bias voltage.
I use many SANYO OS CON in this circuit, and the OP AMP buffer is the OPA633K with OS CON as output capacitors.
I'll need to find some small size trimmers and resistors, RMG resistors are too large for this pcb. Also, the heatsink will be needed for the LM7806 (filament voltage).
| ||Posted 12/14/2006 12:42 PM - 238 Views - 0 eProps - 0 comments|
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