6LU8 Push-pull power amp and other builds

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

Postby tony » Thu Apr 24, 2014 8:02 pm

this is my 6550/KT88 Class AB2 power amp.
uses the 6CM7 and the 6J9 in a Marantz 9 inspired circuit...
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Re: 6LU8 Push-pull power amp and other builds

Postby camotecue » Thu Apr 24, 2014 9:03 pm

Nice Tony. Who's the proud owner?
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Fri Apr 25, 2014 7:15 am

camotecue wrote:Nice Tony. Who's the proud owner?


me..... ;)
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Re: 6LU8 Push-pull power amp and other builds

Postby camotecue » Fri Apr 25, 2014 10:40 am

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

Postby tony » Fri Apr 25, 2014 11:18 am

around 50 watts....
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Fri Apr 25, 2014 8:10 pm

these are a pair of SET OPT's for an 829b amp....
EF86 input tube buffered by a 6N1P cathode follower...

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

Postby tony » Sat Apr 26, 2014 12:22 pm

i plugged in the telefunken 12AT7 into the amp for some more listening...
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Sat May 03, 2014 9:02 pm

May 1 Labor day mini EB to check out the Audio Nirvana FR's..

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

Postby buknoy » Sun May 04, 2014 9:13 am

audio nirvana speakers are surprisingly good in wide listening area :o sarap pakinggan :clap: Very nice EB as well. Thanks for accommodating us master. More power and more tube amps to come :)
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Re: 6LU8 Push-pull power amp and other builds

Postby tenderobject » Sun May 04, 2014 6:28 pm

tony wrote:May 1 Labor day mini EB to check out the Audio Nirvana FR's..


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Saya naman!

Ser, kamusta tumunog yung tube amp dun sa lower left? Parang nakita ko iyan sa Ebay. Chinese made po?
Yung black na amp sa last picture DIY din?
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Sun May 04, 2014 6:36 pm

Dynaco ST70 yan probably Rivoed one,
the preamp was an AMX i was told...
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Re: 6LU8 Push-pull power amp and other builds

Postby hearhead » Sun May 04, 2014 7:20 pm

Uy ang saya nito ah.... Always wondered what the fuss is about regarding full range speakers and tube amps.

Me and my Dad are still having fun A/B testing your tube preamp Sir Tony. So far weve tested it with a Quad 405, Marantz 22 series and Denon and Onkyo power amps with good results.
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Re: 6LU8 Push-pull power amp and other builds

Postby tenderobject » Sun May 04, 2014 7:26 pm

Yung first picture pala yung tinatanong ko ser sa lower left sa tatlong amp.

Sana may ganitong mini EB ng mga tubero pag umuwi ako. :D

tony wrote:Dynaco ST70 yan probably Rivoed one,
the preamp was an AMX i was told...
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Sun May 04, 2014 7:48 pm

this is an Audioromy FU29 using the 829b transmitting tube...
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Sun May 04, 2014 7:50 pm

hearhead wrote:Uy ang saya nito ah.... Always wondered what the fuss is about regarding full range speakers and tube amps.

Me and my Dad are still having fun A/B testing your tube preamp Sir Tony. So far weve tested it with a Quad 405, Marantz 22 series and Denon and Onkyo power amps with good results.


that is good to hear, if you can borrow a 7DJ8, you can roll it, i have good feedback from those who used that tube...
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Re: 6LU8 Push-pull power amp and other builds

Postby hearhead » Sun May 04, 2014 7:52 pm

Nice tip sir. Will try that before I drop by for a custom preamp project :-)
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Thu Jun 19, 2014 7:59 am

now playing.....amp can still use some tweaks...
EF86 buffered by 6N1P driving the 829b paralleled sections in triode mode

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

Postby camotecue » Thu Jun 19, 2014 10:36 am

Tony,

What's the difference between this set-up's sound vs. the set-up the last time I went to your place?
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Thu Jun 19, 2014 11:03 am

camotecue wrote:Tony,

What's the difference between this set-up's sound vs. the set-up the last time I went to your place?


too early to tell, still tweaking the amp, but the potential is there.... ;)

the amp pulls 120 watts from the wall for about 6 wpc music ....
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Re: 6LU8 Push-pull power amp and other builds

Postby tony » Sun Jun 22, 2014 6:50 pm

hearhead wrote:Nice tip sir. Will try that before I drop by for a custom preamp project :-)


i am readying the 7n7 chrometops Aikido preamp in case you visit.... :)
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