6LU8 Push-pull power amp and other builds

For the serious and not so serious in audio: DoItYourself and Tubes (SET, PP, Vintage).

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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Fri Nov 13, 2015 6:46 am

Danny Eulogio SS amp 2nd build redlines....

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ready for power soak testing...

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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Fri Nov 20, 2015 10:56 am

setting up for output trannie bias current...
i installed the to 0.33 ohm resistors to have dog ears so i can clip test leads easily..

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readings accross the resistors for 50mA idle current...
[img]https://fbcdn-photos-f-a.akamaihd.net/hphotos-ak-xpf1/v/t1.0-
0/p180x540/12278755_1031780743510226_4166161999399550472_n.jpg?oh=0259793f3b479eb21b5f38ae24402a7f&oe=56B81058&__gda__=1457739507_b0a3c35441fbff6dc715253b693e744e[/img]
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final reading of 29 watts from an initial reading of 19 watts..
so that the output stage now dissipates 10 watts..
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a look inside with the lid on...
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Sat Dec 19, 2015 7:28 pm

TubeTeK Brute 60.....6C33 pp amp, driven by 6LU8 with 6J9 as input triode....this amp weighs in at over 35kgs....

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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Wed Feb 17, 2016 7:59 pm

first chassis fabrication run for 2016, day 1......this is for a 4D32 SET amp good for about 12 watts, using crazy drive, 6DT8 input tube, 6AU5 cathode follower....

tools, tools tools....
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hole saws galore....
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two holes 38mm...

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more holes....
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bottom plate punched out with 70mm holes.....
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tomorow, finishing....
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Fri Feb 19, 2016 8:25 pm

Day2 of fabrication...all holes punched out, masking tapes removed,
sanding with 220 grit and 400 grit to remove all sharp edges....
after degreasing, will go to the powder coating shop...

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