6LU8 Push-pull power amp and other builds

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

Moderator: kabubi

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...
Image
Image
Image
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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?
User avatar
camotecue
Citizen
Citizen
 
Posts: 623
Joined: Fri Jun 20, 2003 3:25 pm

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..... ;)
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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

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

Ilang watts?
User avatar
camotecue
Citizen
Citizen
 
Posts: 623
Joined: Fri Jun 20, 2003 3:25 pm

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

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

around 50 watts....
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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...

Image
Image
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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...
Image
Image
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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..

Image
Image
Image
Image
Image
Image
Image
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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 :)
buknoy
Newbie
Newbie
 
Posts: 16
Joined: Fri Apr 27, 2012 3:00 pm

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..


Image
Image


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?
User avatar
tenderobject
Master
Master
 
Posts: 2813
Joined: Thu Feb 09, 2006 8:23 am
Location: iran

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...
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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.
User avatar
hearhead
Citizen
Citizen
 
Posts: 220
Joined: Tue May 14, 2013 4:56 pm
Location: Makati

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...
User avatar
tenderobject
Master
Master
 
Posts: 2813
Joined: Thu Feb 09, 2006 8:23 am
Location: iran

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...
Image
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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...
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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 :-)
User avatar
hearhead
Citizen
Citizen
 
Posts: 220
Joined: Tue May 14, 2013 4:56 pm
Location: Makati

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

Image
Image
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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?
User avatar
camotecue
Citizen
Citizen
 
Posts: 623
Joined: Fri Jun 20, 2003 3:25 pm

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 ....
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

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.... :)
User avatar
tony
Fanatic
Fanatic
 
Posts: 1882
Joined: Tue Jun 24, 2003 7:18 am
Location: Pasig City....

PreviousNext

Return to DIY and Tubes

Who is online

Users browsing this forum: No registered users and 5 guests

cron