I have 2 Sony TC-105 reel to reel tape decks that I want to arrange into a Frippertronic style tape echo.
The only outputs are speaker level, so I'm planning on adding a line-level output jack from the pre-amp, just after the volume pot.
This line out will be connected to an audio mixer, which will then feed the first tape deck and the output, etc.
(The units have line-level inputs, so I'm good there.)
From my initial research, I've read that I really should be buffering the signal on that new line-out, to help the signal transfer over the wire (preventing capacitance problems), alleviate the load on the pre-amp, and provide a low impedance input for the mixer.
So I'm looking to build 2 small self-contained buffer boxes. One to go between each of the tape decks' line-outs and the mixer.
I have no idea what I'm doing
but I love to learn.
- I'd like to keep it to a single supply opamp setup for simplicity, to use less parts, and keep the size of the device down. But I could easily be talked out of that.
- I'd like for it to work from an inexpensive switching power supply wall-wart.
- I'd like it to be of reasonably high quality, signal-wise (low noise), without spending too much on exotic op-amps. Those boxes will be used for future audio projects, not jus the TC-105s.
I'm looking for some circuit / design / opamp recommendations.I already have a reasonable selection of op-amps, so if one those if well suited that would be ideal:
AD627
AD642
AD797
AD96173
BA10324
CA55BE
CLC430
KIA4558
LF351
LF353
LF444
LM311
LM324
LM358
LM386
LM741
LM13700
LT1028
MC1490
NE5532
OP37
OPA2134
TL062
TL072
TLC2272
Thanks gang!
Attached is the TC-105 schematics, in case it's useful.