[jeffreybehr]

Frank--the website doesn't contain--
1. Main-out output impedance?
2. Does either section invert signal polarity?
3. A. Is the tape-out buffering done with a tube or a SS device?
....B. What's the tape-out output impedance without buffering?
4. Do you offer options for use with low-output MC fono-carts?

[avahifi]

Output impedance - heck if I know on the tube unit, but it is flat into a 10K load in parallel with 1000 pF of capacitance so amplifier loads are not an issue.

All AVA circuits, except for the phase inverters of course, are non-inverting.

Buffered tape circuit uses a solid state very high speed unity gain current amplifier.  No voltage amplification or feedback.

Tape out impedance is the output impedances of whatever sources are connected without the buffer.  With the buffer, 560 ohms.

No low output moving coil options. You will need a couple of mV of output for best results.

Frank Van Alstine

[tonyptony]

Frank, sent you a PM a few days ago regarding the Ultra. Not sure if you had missed it. Sorry for interrupting this thread.

[rlee8394]

Frank,
Any reason why you couldn't provide phase inverter capability in lieu of the phono section on a T8? I would imagine you could just change the RIAA value to provide unity gain. A single triode stage would provide the phase inversion from the line section. Wouldn't think it would be too difficult to do and it would be a hell of a good option in my opinion. Probably could do the same thing with the buffered tape outputs as well for those who wish to get the phono option and phase inverter.

[avahifi]

There is more to providing an internal phase inverter option than just the circuits.  For example the mute circuits have to doubled and with very precise timing.  A single triode running as an inverted unity gain amplifier is going to have a different phase-gain response than the non-inverted line section, resulting in Class B notch distortion at the output when summed.  Finally, the request for this option is not sufficient to design it in.  Our free standing phase inverters are there for those who need this function and they do the job very well indeed.

Frank Van Alstine