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Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 12:34 pm
by sdiesel77
Hi Guys,
My new DIY Integrated Tube Amplifier is finally at home! [emoji7]
Following five long months of design & assembling it is now singing at home!

Specs:
Tubes : KT90, 6SN7, EF86
Output transformers: Hashimoto HW-60-5
Coupling caps: Audyn True Copper Max
Resistors: Takman Audio
Motorised potentiometer ALPS Blue Beauty
Estimated power: 2 x 60 watts RMS
Weight: 26kg
Dimensions cm : L39 x l49 x H 22

https://youtu.be/bDIGruVSxrM
https://youtu.be/bDIGruVSxrM[/youtube]

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[IMG]https://uploads.tapatalk-cdn.com/201908 ... 164368.jpg[/IMG]

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Re: Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 3:37 pm
by HiFiFan
Looks great. You need a night time shot to show off the tubes.

How are you liking the sound?

Re: Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 3:53 pm
by sdiesel77
Really really like the sound of it.
It has a wide soundstage, detailed and warm tube sound with precise and punchy bass :)
It's really powerful, I can only bring the volume pot to maximum 1/4 then it's too loud.
Tubes.jpg
Tubes.jpg (52.31 KiB) Viewed 891 times

Re: Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 6:04 pm
by cybot
A thing of beauty in the light and in the dark. Well done and long may you enjoy 😊

Re: Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 7:12 pm
by Fran
Ah thats a beauty!

Well you may wear!

Re: Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 7:14 pm
by Fran
whats that selector switch you used at the back?

Re: Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 7:36 pm
by nige2000
Really nice job on that. Congratulations

Re: RE: Re: Full DIY Tube Amplifier: KT90 6SN7 EF86

Posted: Fri Aug 23, 2019 8:17 pm
by sdiesel77
Fran wrote:whats that selector switch you used at the back?
Ahahah well spotted Fran!
It's to switch on or off the front screen (showing the bias for each KT90)
I wasn't sure I wanted to have it on non stop but actually I prefer it on [emoji16]