Solo SRGII v Solo Ultra-Linear

What we're waiting for is a delivery of these...

the prototype ultra-linear module

The ultra-linear module is our solid-state version of a tube (valve).

I've been dip coating them myself but the drying times of my own epoxy dip based on circuit board notation ink is about 3 days, and I only have 0.5 metres (1 cubit) of hanging space in front of the infra-red tube heater needed to stove them without exceeding the temperature ratings of the components. Our transformer manufacturer will be doing the production coating in a different colour to white.

The reason for dip coating is to protect our "intellectual property" - I'm sure if we left them uncoated our secret would be all over the world within hours.

There are a few other mods over the SRGII needed to accommodate it as the module works best at a different (more) gain to the SRGII, and therefore there is also some input attenuation and other component changes to counter this.

There are about 4 or 5 versions of this ultra-linear module to date, all able to do the solid-state tube function in a number of products.

In case anybody guesses, it's not like the op-amps that are forced into "class-A". The op-amp output stays in its normal output operating mode... neither is it anything like using the VAS stage output as the reader may have read about around the forums. In fact, we can utilise four (or more) different op-amps of which only one has a VAS output pin. We'd thought about a patent but it has been done before (of "prior knowledge" - not patented), but the details have been lost in the annals of time, and the application had not been developed on to the extent the ultra-linear module has.

We also hope to offer a version designed to tweak up the Genera phono preamp project to extreme-fidelity - it sounds quite incredible here, but it will obviously have to be at a premium price - it's something that really works!



Edited by Graham Slee - 11 Mar 2010 at 1:19am

Many thanks for your reply, Darren. Your store has many interesting stocks, and I am glad that I didn't miss that one out.

iBasso CB03 iPod Dock Connector would be a perfect companion to go with Voyager. Yet, RCAs at the back Solo will favour i-Lead, I'm afraid

Sendstation PocketDock Line Out USB is a brilliant product, which opens all the possibilities of using other cables, for instance i-Lead. With the help of Sendstation PocketDock, I can buy a 3.5mm/RCA cable and use it on multiple devices, say connecting Sony PCM-D50 to Solo. May I ask what RCA connectors were used on i-Lead? They shall have a good looking.

On the other hand, I was wondering if there's anything wrong with Russ Andrews' product? Never did i audited their GQ-24 cable, hence little can i say whether it is a good cable to go with iPod or not. The combination of Sendstation PocketDock + i-Lead RCAs will almost double the cost of a GQ-24. However, the combination offers unmatched flexibility (hence, a lot more playability ).

@J2004823...

?