Author Topic: Monoblock 6550/KT88 Push Pull Amplifier (Read 11523 times)

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.

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

chassis:

driver tubes:

coupling caps:

power tubes:

form fitting the tubes and irons:

Brian_mico · « **Reply #1 on:** Mar 02, 2010 at 08:55 PM »

Eto ang magandang abangan !!! congratz in advance sir Edrel..

edrel sison · « **Reply #2 on:** Mar 02, 2010 at 08:56 PM »

output irons:

edrel sison · « **Reply #3 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.

dana · « **Reply #4 on:** Mar 03, 2010 at 11:53 AM »

wow...beseng bese ang mama.
interesting coupling caps ah...

edrel sison · « **Reply #5 on:** Mar 03, 2010 at 01:02 PM »

thanks don. they are paper in oil from the ukraine!

romymartinez · « **Reply #6 on:** Mar 04, 2010 at 06:51 PM »

Wow!

Congrats Sr edrel and more congrats to the owner.

efren_ · « **Reply #7 on:** Mar 05, 2010 at 09:03 PM »

Another masterpiece from the great "Iron Man"!

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,

bass_nut · « **Reply #8 on:** Mar 05, 2010 at 10:29 PM »

Quote from: romymartinez on Mar 04, 2010 at 06:51 PM

Wow!

Congrats Sr edrel and more congrats to the owner.

x2 !!!

edrel sison · « **Reply #9 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..

alexg · « **Reply #10 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?

edrel sison · « **Reply #11 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.

alexg · « **Reply #12 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.

edrel sison · « **Reply #13 on:** Mar 06, 2010 at 11:01 AM »

give it to me, i will replicate..

alexg · « **Reply #14 on:** Mar 06, 2010 at 11:10 AM »

Quote from: edrel sison on Mar 06, 2010 at 11:01 AM

give it to me, i will replicate..

Ok, do you need to destroy it? Which is ok with me. hehehehe....

edrel sison · « **Reply #15 on:** Mar 06, 2010 at 11:15 AM »

nope, am just gonna make a few tests..

efren_ · « **Reply #16 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

Swiss/Germans in particular are very strict when it comes to quality, even the smallest details are thoroughly scrutinized.

bass_nut · « **Reply #17 on:** Mar 06, 2010 at 12:58 PM »

Quote from: 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..

i will be most honored to have you and our buddies in my humble town sir Edrel

heathkit · « **Reply #18 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

edrel sison · « **Reply #19 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..

edrel sison · « **Reply #20 on:** May 07, 2010 at 10:52 AM »

Quote from: bass_nut on Mar 06, 2010 at 12:58 PM

i will be most honored to have you and our buddies in my humble town sir Edrel

yaan mo doc, malapit na!

bass_nut · « **Reply #21 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

heathkit · « **Reply #22 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.

edrel sison · « **Reply #23 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.

edrel sison · « **Reply #24 on:** May 08, 2010 at 03:56 PM »

Quote from: 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

hi doc, me too looking forward..

heathkit · « **Reply #25 on:** May 08, 2010 at 08:17 PM »

ok po thanks po sa advice sir edrel

odyopayl · « **Reply #26 on:** May 15, 2010 at 12:39 PM »

Quote from: edrel sison on May 08, 2010 at 03:56 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!

bass_nut · « **Reply #27 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 !!!

heathkit · « **Reply #28 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

geriboy · « **Reply #29 on:** Jul 03, 2011 at 06:23 PM »

matagal na pala itong thread na ito... sir edrel, kumusta na po itong project na amp?