The MINT Headphone Amplifier
What is a MINT?
The MINT was a Jung multiloop type amp circuit designed similarly
to the META42
The MINT is now obsolete. I have replaced it with the PINT design.
The MINT board featured:
- Very small board size: 1.9" × 1.5" (48mm × 38mm)
- Accepts dual-channel SO-8 op-amps.
- Burr-Brown BUF634U (SO-8)
buffer on each output channel, including a place on the board
for a bandwidth setting resistor.
- Very basic power supply circuit compared to META42: just two
10mm diameter electrolytic capacitors and an unbuffered TLE2426 rail
splitter.
- Reverse power supply voltage protection (crowbar method)
- The board makes using 2× series power sources easy. This is
ideal for 2×9V batteries or 2×AAA battery holders.
- Accepts CRDs for biasing the op-amp channels into class A.
- Pads for the Panasonic EVJ potentiometer
- Most resistors are on 0.100" × 0.300" spacing so you
can put a DIP socket in their place and socket the resistors for
easy experimentation.
- You can cut the board in half down the long axis and
connect the halves together back-to-back. This allows you to
mount the board in the case with the Panasonic pot sideways,
which is a must for short enclosures like mint tins and Serpac
H-65s. (Picture)
Why Was It Called "MINT"?
- META42 Is Now Tiny (or, "META42 Inna Tin")
- It fits into mint tins
- It's small and sweet :)
Where To Next?
Building the MINT Amplifier: