"Aikido" headphones amp with ECC40 and E182CC

[32860]

A photo and the schematic of the headphones amp i have finished, except for the housing. More information (in Dutch...) and photos can be found in this and older postings on my site: OTL800: Headphones Amp klaar

I built it for my AKG K240 headphones (impedance = 600 Ohm).

The combination of the regulated power supply and the Aikido principle is of course over the top. But for me it is a good excuse to use many tubes and the available chassis (from a long time ago dismantled radio).

Greetings,
Robert

 

[kodabmx]

Nicely done man.

 

[32860]

Thanks.

 

[blackdod]

Nice proyect.

 

[gideon1990]

Just a couple of days ago your amp came to mind because I remembered the original schematic you drew up, and damn there she is again

 

[Kay Pirinha]

What exactly does this PY81 damper diode do except producing heat waste?
Best regards!

 

[Bas Horneman]

What exactly does this PY81 damper diode do except producing heat waste?

Slow startup of b+ I suppose.

 

[32860]

Yes, the PY81 is in there for slow startup (and to add to the tube count i confess). I takes the PY81 about 30 seconds to start to conduct and than it comes up slowly.

Greetings,
Robert