Ian's valve audio

Ian's valve audio Audio amplification project, started in 2003, using a pair of 813 valves in class A push pull config

24/10/2019

Next, I will be upgrading the 813 amps using ClarityCap polyester capacitors in place of the current electrolytic capacitors.........

Finally, alongside the 813 amps making beautiful music
24/10/2019

Finally, alongside the 813 amps making beautiful music

Final wiring and testing
24/10/2019

Final wiring and testing

More internal wiring
24/10/2019

More internal wiring

EF37A top cap wiring with screened support and PCB providing raised heater supplies for cathode follower valves
24/10/2019

EF37A top cap wiring with screened support and PCB providing raised heater supplies for cathode follower valves

Base plate and shock mount feet.
24/10/2019

Base plate and shock mount feet.

Stepped bass and treble control wiring
24/10/2019

Stepped bass and treble control wiring

Adding of components and heater wiring
24/10/2019

Adding of components and heater wiring

Copper sub chassis floating on rubber shock mounts
24/10/2019

Copper sub chassis floating on rubber shock mounts

DC heater supply boards
24/10/2019

DC heater supply boards

Top plate of preamp and mains transformer
24/10/2019

Top plate of preamp and mains transformer

EM71 VU meters under test
20/08/2018

EM71 VU meters under test

Address

Bourne End
SL85AA

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