Recent content by wynpalmer

The STM-72 has 35dB of gain. That means that the impedance of the cartridge (c. 2 ohms resistive) plus the interconnect wiring is increased at the SUT output by 70dB or by a bit over 3000. That means the source resistance that the Pyxi sees will be > 6kohms. At that level the input bias current...

The Pyxi has a gain of 65.5dB in MC mode. Some users are using it with 70uV sensitivity cartridges., but the A weighted S/N ratio would be in the low 70dBs and would be just barely better than the best LP surfaces, which is not ideal. The max output from LPs would be about 600mv RMS, which is...

No break in time required. There are no components that require aging. However, the "ear" adjusts to the sound as time goes by, and can better appreciate the improvements.

Thanks!

Copy of Pyxi Operating Manaul (rev2).docx (sotaturntables.com) The caps make no difference for MC- except for the HF resonance, so it's best to have them as low as possible. If I were you I'd probably switch 1 and 2 on and call it a day, or perhaps 2 only. I can't find a set of specs for all of...

The Pyxi is designed to have a peak output of 4dBv for a 250uv (MC) or 2.5mv (MM) input +12dB, which is a typical recording maximum, and +6dBv for +14dB which, in my experience is the max I've ever had from an LP, resulting in 6dBv out. 6dBv is the usual line input level.

I did a comparison with a DM10 at a friends in Atlanta, using the V2.0 of the WP phono, and I could not hear a significant difference, but the DM10 owner preferred the WP phono. The Pyxi is based on the v2.0 design.

The Pyxi is c. 65dB.

The cap is in pF. Realy only important for MM cartridges. The RES is ohms.

Oh, and by the way, I have a "five figure" turntable setup.

All you get is what is there on the album. No more. No less. It's a window into the recording. Seriously, it has specs as good as the Halcro preamps at 1% of the price...

I'd be very interested in your observations as that was essentially the reason that I got involved in this "development" in the first place. Hopefully you like what you hear. However, like all designs there are trade offs and imperfections, and understanding what users experience is invaluable...

Yes, J!m has done a remarkable job in all respects. It's been interesting to see how enthusiastic a number of builders are, despite the relative complexity of the task.

That's why I now live in NC. I was with Analog Devices for many years, based in Wilmington.

Sterling, Eh? I did a masters at WPI and I have a daughter that lives in Boylston. Lovely area...