Valve - Suppliers

Finding valves has become a bit of a problem with Mr. Valve closing down.

After a long search and many emails with some potential suppliers I found an excellent alternative supplier in the Canada, they do all the usual manufacturers Sovtek, Svetlana, Electro-Harmonix, JJ, etc., and we get fast delivery to SA +- 1 week using FedEx.  

Pricing Guide for South Africa Ex works, Ex Vat, Each (ROE US$1 = ZAR 14.8)

KT88 EH                                R1102.-

6550 EH                                R1082.-

6Pi45C EL509                      R1250.-

12AU7   Ecc82                     R  535.-

12AX7   Ecc83                     R  535.-

email me at michael00burger@gmail.com for a quote and delivery.

Analogue One.

This is a work in progress and not the final diagrams!

Analog One is a new High-End 50W Push-Pull UL Valve amplifier using KT88EH or 6550EH and a Hammond manufacturing 1650K output transformer, I designed it with a un-pluggable driver / preamp stage so I can replace this stage with a high grade Solid-state solution in future. 

I will be posting the prelim and final design as I get to it and will be making changes during the next weeks as I construct the prototype.

Diagram of 1 channel of the UL Amplifier

PCB layout of the UL amplifier, it is designed so I can remove (Un-plug) the valve driver stage and replace it with a solid-state driver stage

Proteus 3D rendering of 1 channel PCB of the Amplifier

Diagram of the PSU I will make a PCB for the components as it makes the final product easier to assemble and work on.

The prelim design of the mains transformer