PinoyDVD: The Pinoy Digital Video & Devices Community

Home Theater => Audio => Tubes => Topic started by: edrel sison on Mar 02, 2010 at 08:53 PM

Title: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 02, 2010 at 08:53 PM
Long time coming....

This is for a fellow PDVD member and a friend who currently goes in and out of a mid sea sanctuary. ;D ;D

I have chosen the williamson circuit in building the amp. This is a work in process and shall be continually updated.

chassis:

(http://i880.photobucket.com/albums/ac7/alphatechsison/chasi1.jpg)

driver tubes:

(http://i880.photobucket.com/albums/ac7/alphatechsison/driver1.jpg)

coupling caps:

(http://i880.photobucket.com/albums/ac7/alphatechsison/caps1.jpg)

power tubes:

(http://i880.photobucket.com/albums/ac7/alphatechsison/outputtubes.jpg)

form fitting the tubes and irons:

(http://i880.photobucket.com/albums/ac7/alphatechsison/amp2.jpg)

(http://i880.photobucket.com/albums/ac7/alphatechsison/amp1.jpg)




Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: Brian_mico on Mar 02, 2010 at 08:55 PM

Eto ang magandang abangan !!! congratz in advance sir Edrel..  ;)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 02, 2010 at 08:56 PM
output irons:

(http://i880.photobucket.com/albums/ac7/alphatechsison/pp-opt1.jpg)

(http://i880.photobucket.com/albums/ac7/alphatechsison/pp-opt2.jpg)

(http://i880.photobucket.com/albums/ac7/alphatechsison/pp-opt3.jpg)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 02, 2010 at 08:59 PM
thanks brian. tight sched is a constraint but will always find time to work on and update this thread.
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: dana on Mar 03, 2010 at 11:53 AM
wow...beseng bese ang mama.
interesting coupling caps ah...
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 03, 2010 at 01:02 PM
thanks don. they are paper in oil from the ukraine! :) :)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: romymartinez on Mar 04, 2010 at 06:51 PM
Wow!

Congrats Sr edrel and more congrats to the owner.  ;D
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: efren_ on Mar 05, 2010 at 09:03 PM
Another masterpiece from the great "Iron Man"! ;D
Congratz sir Edrel!
As to the owner, you have a good reason to stay home once you take R&R from the ship!
btw, I wonder what AT&S stands for ??? bka may magtanong sa akin, kasi di ko po tinanggal yung nakadikit sa OPT's ko, ;)
(http://i646.photobucket.com/albums/uu184/efrennoble/Image053.jpg)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: bass_nut on Mar 05, 2010 at 10:29 PM
Wow!

Congrats Sr edrel and more congrats to the owner.  ;D

x2 !!!  8)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 06, 2010 at 08:16 AM
romy thanks. how's your system going?

doc long time no hear, how are you? i hope i can drop by pampanga one of these days.

efren, AT&S was coined by my partner in Switzerland. you can see them here:

www.alphatechnology.ch

it was a partnership. S is my surname.. ;) ;)
 
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: alexg on Mar 06, 2010 at 08:56 AM
114x40 ang OPT, 96x40 will not cut it? hehehehehe.... or you just want to really make sure that it will be good?  ;)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 06, 2010 at 10:14 AM
11460 alex, dynaco's (and even acrosound) original size was 11450, i have made it thicker because they are using M3, mine is M6..

with teflon couplings between primary and secondary windings i am sure it will be good. :D :D

Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: alexg on Mar 06, 2010 at 10:36 AM
I have a single Acrosound OPT for a PP KT88, what can I do with it?

I have tried eBay to source for another one, no luck.
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 06, 2010 at 11:01 AM
give it to me, i will replicate..  :) :)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: alexg on Mar 06, 2010 at 11:10 AM
give it to me, i will replicate..  :) :)

Ok, do you need to destroy it? Which is ok with me. hehehehe....
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Mar 06, 2010 at 11:15 AM
nope, am just gonna make a few tests..
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: efren_ on Mar 06, 2010 at 12:19 PM
sir edrel,

now i see why your OPT's can be considered export quality, it got that european touch 8) Swiss/Germans in particular are very strict when it comes to quality, even the smallest details are thoroughly scrutinized.

Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: bass_nut on Mar 06, 2010 at 12:58 PM
romy thanks. how's your system going?

doc long time no hear, how are you? i hope i can drop by pampanga one of these days.

efren, AT&S was coined by my partner in Switzerland. you can see them here:

www.alphatechnology.ch

it was a partnership. S is my surname.. ;) ;)
 

i will be most honored to have you and our buddies in my humble town sir Edrel  8)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: heathkit on May 06, 2010 at 11:07 AM
good day sir edrel, yong project ninyo na tuba amp parehas ba sa heathkit w4-am at pre amp nito. kasi eto gamit ko na amp and pre amp heathkit. thanks
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on May 07, 2010 at 10:45 AM
williamson po yung amp na ito using 6SN7s as driver and phase splitter with few modifications. maganda po yang W4M, meron akong W5M using GEC KT66s and it sounds fantastic.

i am just awaiting a few more parts from imports and i can put it all together na..
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on May 07, 2010 at 10:52 AM
i will be most honored to have you and our buddies in my humble town sir Edrel  8)

yaan mo doc, malapit na! :) :)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: bass_nut on May 07, 2010 at 11:56 AM

must clean my smallish room then... looking forward to meeting you, our buddies plus a listen to your mouthwatering projects.. tons of thanks brother Edrel  8)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: heathkit on May 07, 2010 at 06:34 PM
good day sir edrel, medyo baguhan lng po ako sa tube amp. pwede bang mag upgrade ng watts etong w4-am amp ko? sa ngaun gamit kong speaker ay jpw speaker. thanks.
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on May 08, 2010 at 09:29 AM
schematic here:
http://www.freeinfosociety.com/electronics/schemview.php?id=493

this amp uses 5881/6L6 or a KT66 for an output of 25Wpc in push pull. i would not mess up with the amp just to have an increase of few power. the most logical approach is to match the amp to a fairly sensitive speaker. look for suitable ones in the vicinity of 90db and up sensitivity.
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on May 08, 2010 at 03:56 PM
must clean my smallish room then... looking forward to meeting you, our buddies plus a listen to your mouthwatering projects.. tons of thanks brother Edrel  8)

hi doc, me too looking forward.. :)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: heathkit on May 08, 2010 at 08:17 PM
ok po thanks po sa advice sir edrel
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: odyopayl on May 15, 2010 at 12:39 PM
hi doc, me too looking forward.. :)

Edrel, Congrats! Nice gear!
@Doc Fer, once Edrel visited Pampanga, give me a call punta ako! Lets meet and have some coffee talk somewhere!
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: bass_nut on May 15, 2010 at 01:18 PM
looks like a long coffee chat and a good listen with HiFi music.. will ping you bro June when sir Edrel will be visiting our humble town.. cheers !!!
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: heathkit on Jan 20, 2011 at 07:36 PM
gud pm sir edrel,inquire lng po ako kung magkano kaya ang cost magpagawa ng tube mono na amp 20watts.para ipa partner ko sa heathkit w4am ko. thanks po
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: geriboy on Jul 03, 2011 at 06:23 PM
matagal na pala itong thread na ito... sir edrel, kumusta na po itong project na amp?:)
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: stick on Aug 27, 2011 at 09:32 AM
Oo nga sir edrel... nakita ko itong amp na to... katulad pa din sa first post mo... hehe... simulan nyo na ulit para matapos na at marinig na natin...
Title: Re: Monoblock 6550/KT88 Push Pull Amplifier
Post by: edrel sison on Aug 27, 2011 at 07:36 PM
Yes James, unfortunately havent completed due to heavy business loads. This actually belongs to Bey, a fellow PDVD member. Once I am able to have the plant organized... this keeping me to a halt.