This 'Spud' is no dud.

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

OK, DIY in the form of a kit, but still...

Doc Bottlehead's 6FJ7 based 'Spud' amp (S.E.X or Single Ended Experimenters kit) can be used as either a headphone amp or 2 Watt 8 Ohm Single Ended amp suitable for REALLY high sensitivity speakers.

Somehow I managed to cobble it together and it actually worked.

And how!

Driving my 106dB EdgarHorns where 2 Watts should be plenty it has all of the 'poop' the horns require in a 360 Sq. Ft. space.

Better my 300B amp? Certainly quieter!

'SET Magic'? Indeed!

No hurry to go back to the 300B.

And I can plug in a headphone and it just cuts off the speakers and drives the headphones.

First they came for the dumb-asses
And I did not speak out
Because I was not a dumb-ass

The 6FJ7 (Open in New Window)

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Topic - This 'Spud' is no dud. - Ivan303 17:56:01 10/09/20 (3)

Thanks for the kind words! - Paul Joppa 22:38:21 10/20/20 (1)

You guys did a great job of designing it for low noise as well... - Ivan303 06:11:19 10/21/20 (0)

RE: This 'Spud' is no dud. - PakProtector 12:31:33 10/12/20 (0)

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