Since my 845 Mono's have been converted to Balanced and the impression made being more than anticipated for the better, I took on a new interest in what the Pre' Amp Design should be able to do for my purposes.
I now have all the Parts for a earlier Pre Amp Design that is to be a Dual Mono Balanced Design and have added to the options to experience an alternate take on a Pre Amp' Design as a Dual Mono Design to be both Single Ended and work with the Balanced Power Amp's.
The alternate design for a Pre Amp' is my conception given to an individual with over 40 years experience of a career being a designer / builder of Valve and Solid State Devices. The shaping of my conceptual thoughts by this individual has been extremely interesting.
As a Tease I already have in use a Prototype Single Box version of the SS Section for the Pre, which is becoming quite addictive to experience. Other Pre's both SS and Valve that have been used in comparison to the prototype, off which all have been quite attractive in use, have not been able to maintain the role as the Pre' that most impresses. They have been swapped out to return to use of the Prototype, .
The BOM for both Amps is close to £1500 +/- £250 - £500 for Valves and +/- £400 - £500 for the Chassis. Design Charge and Labour Charges are yet to be added.
I would have had one built as a Single Box using the C7 Chassis with modifications, if I won it at close to £300.