caramoan tour package

caramoan tour package

« previous next »
Pages: [1] 2 3 ... 7   Go Down

Author Topic: tony's 6LU8 push-pull power amp build  (Read 5742 times)

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5561
  • Pogi/Ganda Points: 539
  • Gender: Male
  • leach amp afficionado
tony's 6LU8 push-pull power amp build
« on: February 15, 2011, 02:13:29 PM »
Hi all,

inspired by this article on the net, http://www.veiset.net/6LU8/index.html i decided to build myself one, i have ordered about 700 pcs of these $1 tubes from Roy and Dale Rogalski of http://www.vacuumtubes.net/ now it's time to put them to good use:



the 6LU8 is like a 6V6 and 1/2 of 12AT7 placed in s single 12 pin compactron envelope, i wanted to use the 21LR8 at first but then the novar sockets had issues, they were loose, i found out that they were intended for tubes like the PL504 which had thicker pins.....oh well.....here is the link for the 6LU8: http://frank.pocnet.net/sheets/123/6/6LU8.pdf

so i designed all the irons needed, the power transformers, filter choke and output transformers, the 2 output transformers used Edrel's RM20 cores which like his more expensive Z11's had the same 0.35mm thikness, Deeco Irons were then used for the power transformers and filter choke, deeco iron has a thickness of 0.5mm....

pics of the irons and some parts:




the power supply used the 3DG4 tube,http://frank.pocnet.net/sheets/093/3/3DG4.pdf it is likewise a hybrid rectifier using solid-state bridge, a toggle selector switch is used to select ss only rectification if desired.....the advntage of a hybrid is that being a full bridge rectifier transformer heating is way much lower than if staright full-wave is used using tube rectifier only......design and construction of the power transformer then becomes easier and cheaper....


construction pics:
















testing:

i used another set of speakers to test whether the polarity of the output transformer was correct, there is a 50-50 chance you will get it, but upon power up motorboating happened so i had to power down and reverse the plate lead connections to the right one.....after that, the amps was dead quiet, no hum, no hiss no noise.....i tested the amp and found out that the sensitivity was quite low, so i hooked up the 7N7 preamp to get a more decent volume.....later on i found out that i connected 470ohms feedback resistor instead of 4.7k so gain was really low....
Logged

Philippine Electronics Forum

tony's 6LU8 push-pull power amp build
« on: February 15, 2011, 02:13:29 PM »

Offline j a y k e z

  • Diesel Generator
  • *
  • Posts: 1992
  • Pogi/Ganda Points: 183
  • Gender: Male
  • gimmegaggigsss
Re: tony's 6LU8 push-pull power amp build
« Reply #1 on: February 15, 2011, 02:18:41 PM »
+1 po sir Tony
ang ganda sir haha
subscribing  :o
Logged

Philippine Electronics Forum

Re: tony's 6LU8 push-pull power amp build
« Reply #1 on: February 15, 2011, 02:18:41 PM »

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5561
  • Pogi/Ganda Points: 539
  • Gender: Male
  • leach amp afficionado
Re: tony's 6LU8 push-pull power amp build
« Reply #2 on: February 15, 2011, 02:25:30 PM »
Quote from: Jayke™ on February 15, 2011, 02:18:41 PM
+1 po sir Tony
ang ganda sir haha
subscribing  :o

thanks meron pang pahabol:




Logged

Philippine Electronics Forum

Re: tony's 6LU8 push-pull power amp build
« Reply #2 on: February 15, 2011, 02:25:30 PM »

Offline marleona

  • Size D Battery
  • ******
  • Posts: 312
  • Pogi/Ganda Points: 2
  • Gender: Male
Re: tony's 6LU8 push-pull power amp build
« Reply #3 on: February 15, 2011, 02:33:50 PM »
IMBA!!! hahaha how much was the total cost for that project?
Logged
It is not the answer that enlightens, but the question.
Don't hesitate to ask question.
If you don't ask, you don't get.

Philippine Electronics Forum

Re: tony's 6LU8 push-pull power amp build
« Reply #3 on: February 15, 2011, 02:33:50 PM »

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5561
  • Pogi/Ganda Points: 539
  • Gender: Male
  • leach amp afficionado
Re: tony's 6LU8 push-pull power amp build
« Reply #4 on: February 15, 2011, 02:36:22 PM »
Quote from: marleona on February 15, 2011, 02:33:50 PM
IMBA!!! hahaha how much was the total cost for that project?

less than 10k...
Logged

Philippine Electronics Forum

Re: tony's 6LU8 push-pull power amp build
« Reply #4 on: February 15, 2011, 02:36:22 PM »

Offline RaffT

  • Technical People
  • Hydroelectric
  • *****
  • Posts: 3440
  • Pogi/Ganda Points: 103
  • Gender: Male
  • more on R-n-D
    • MY Bots
Re: tony's 6LU8 push-pull power amp build
« Reply #5 on: February 15, 2011, 03:51:25 PM »
VERY NICE BUILD! :)

esp the chassis... hehehe
Logged
Learning is CooL! BEAM robotics/DIY UCD180/PSP/AC wtmtr/digiESRmtr/PICkit™2 clone/SGTC/SSTC/DR-SSTC

Never argue with an idiot... They'll take you down to their level and beat you with experience

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5561
  • Pogi/Ganda Points: 539
  • Gender: Male
  • leach amp afficionado
Re: tony's 6LU8 push-pull power amp build
« Reply #6 on: February 15, 2011, 05:21:08 PM »
Quote from: RaffT on February 15, 2011, 03:51:25 PM
VERY NICE BUILD! :)

esp the chassis... hehehe

thanks, the aluminum chassis i used here was chromate treated that is why the color....

a look under the hood of the completed amp:
Logged

Offline NORTH LUZON

  • Solar Power Satellite
  • *****
  • Posts: 6362
  • Pogi/Ganda Points: 834
  • HOY BAKLA,OT KA SA TECHNICAL THREAD
Re: tony's 6LU8 push-pull power amp build
« Reply #7 on: February 15, 2011, 07:46:45 PM »
master tony ask ko lang po
kaya kayang pantayan nyan ang KONZERT 502 sa lakas at pino ng sounds?
Logged
KUNG MAY PROBLEMA KA SA AKIN WAG MO IDAAN SA SALITA LANG. SET KA NG ARAW AT KITA TAYO

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5561
  • Pogi/Ganda Points: 539
  • Gender: Male
  • leach amp afficionado
Re: tony's 6LU8 push-pull power amp build
« Reply #8 on: February 15, 2011, 08:18:16 PM »
Quote from: I N S I D E R  2011 on February 15, 2011, 07:46:45 PM
master tony ask ko lang po
kaya kayang pantayan nyan ang KONZERT 502 sa lakas at pino ng sounds?

baka magulat ka, 10 watts per channel lang ito, pero kayang tapatan yung knozert kung gamit sa bahay lang....
Logged

Offline NORTH LUZON

  • Solar Power Satellite
  • *****
  • Posts: 6362
  • Pogi/Ganda Points: 834
  • HOY BAKLA,OT KA SA TECHNICAL THREAD
Re: tony's 6LU8 push-pull power amp build
« Reply #9 on: February 15, 2011, 08:24:54 PM »
Quote from: tony on February 15, 2011, 08:18:16 PM
baka magulat ka, 10 watts per channel lang ito, pero kayang tapatan yung knozert kung gamit sa bahay lang....

wow!
may tube amp din kasi kami dati at gamit namin sa sound system at 6L6 ang tube at super lakas
bale 8 pcs ung tube out na ginamit at pinagawa namin kay mr QUIROS sa dagupan city
bale ang spkr load namin ay 300 watts JVC 15 inches at 2 driver unit para sa trompa
Logged
KUNG MAY PROBLEMA KA SA AKIN WAG MO IDAAN SA SALITA LANG. SET KA NG ARAW AT KITA TAYO

Offline ???

  • Solar Power Satellite
  • *****
  • Posts: 8362
  • Pogi/Ganda Points: 433
Re: tony's 6LU8 push-pull power amp build
« Reply #10 on: February 15, 2011, 08:32:43 PM »
Hayy, sana kaya kung gumawa ng ganyan. Hindi kasi naipasa sa akin kung paano gawin yan eh.
Logged
*http://www.elab.ph/forum/index.php?topic=36002.0
*http://www.elab.ph/forum/index.php?topic=35611.0
*http://www.elab.ph/forum/index.php?topic=37150.0
*http://www.elab.ph/forum/index.php?topic=29963.0

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5561
  • Pogi/Ganda Points: 539
  • Gender: Male
  • leach amp afficionado
Re: tony's 6LU8 push-pull power amp build
« Reply #11 on: February 15, 2011, 08:37:42 PM »
Quote from: JackS on February 15, 2011, 08:32:43 PM
Hayy, sana kaya kung gumawa ng ganyan. Hindi kasi naipasa sa akin kung paano gawin yan eh.

kaya ako nagpopost dito,para yung mga kabataan dyan ay maencourage na magbuo ng tube amps....
Logged

Offline ???

  • Solar Power Satellite
  • *****
  • Posts: 8362
  • Pogi/Ganda Points: 433
Re: tony's 6LU8 push-pull power amp build
« Reply #12 on: February 15, 2011, 08:40:24 PM »
Ayaw kasing ipasa sa akin knowledge. Laki pa naman pagmamalaki nun na pinapala nila dati sa raon ang mga tube.
Logged
*http://www.elab.ph/forum/index.php?topic=36002.0
*http://www.elab.ph/forum/index.php?topic=35611.0
*http://www.elab.ph/forum/index.php?topic=37150.0
*http://www.elab.ph/forum/index.php?topic=29963.0

Offline tony

  • Technical People
  • Solar Power Satellite
  • *****
  • Posts: 5561
  • Pogi/Ganda Points: 539
  • Gender: Male
  • leach amp afficionado
Re: tony's 6LU8 push-pull power amp build
« Reply #13 on: February 15, 2011, 08:49:15 PM »
Quote from: JackS on February 15, 2011, 08:40:24 PM
Ayaw kasing ipasa sa akin knowledge. Laki pa naman pagmamalaki nun na pinapala nila dati sa raon ang mga tube.


maswerte ang mga kabataan ngayon, meron ng internet at mraming forums na pwedeng tambayan para kumuha ng kurunungan....walang sikreto sa pagbubuo ng tube amps.....just hard work....
Logged

Offline marleona

  • Size D Battery
  • ******
  • Posts: 312
  • Pogi/Ganda Points: 2
  • Gender: Male
Re: tony's 6LU8 push-pull power amp build
« Reply #14 on: February 15, 2011, 08:54:03 PM »
hahaha basta IMBA!!! gusto ko rin gumawa niyan! kapag may pera na ako.
Logged
It is not the answer that enlightens, but the question.
Don't hesitate to ask question.
If you don't ask, you don't get.

Offline tiktak

  • Gas Turbine
  • **
  • Posts: 2863
  • Pogi/Ganda Points: 204
  • Gender: Male
    • Tiktakx's Blog
Re: tony's 6LU8 push-pull power amp build
« Reply #15 on: February 15, 2011, 09:04:11 PM »
sana ok pa yung mga 6L6 at 12ax7 sa bahay, sana makabuo din ako nyan in the near future :D
Logged
8051 stuff

Offline Mhavskie

  • Diesel Generator
  • *
  • Posts: 1114
  • Pogi/Ganda Points: 77
  • Gender: Female
  • NeverShoutNever!
Re: tony's 6LU8 push-pull power amp build
« Reply #16 on: February 15, 2011, 09:08:02 PM »
uso pa din ang tube amps, sana makagawa ako nyan someday, ;D
Logged
ΩA Pure And Strong Heart Is An Unstoppable Weapon. Ω

Offline NORTH LUZON

  • Solar Power Satellite
  • *****
  • Posts: 6362
  • Pogi/Ganda Points: 834
  • HOY BAKLA,OT KA SA TECHNICAL THREAD
Re: tony's 6LU8 push-pull power amp build
« Reply #17 on: February 15, 2011, 09:21:00 PM »
ang matindi kasi sa mga tube amp ay habang umiinit ung tube ay lalong tumitindi ang lakas at malayo ka sa breakdown lalo na sa outdoor mo gagamitin! ang pansin ko lang ay may hangganan ang lakas nyan
Logged
KUNG MAY PROBLEMA KA SA AKIN WAG MO IDAAN SA SALITA LANG. SET KA NG ARAW AT KITA TAYO

Offline chinokscapsighter

  • Size C Battery
  • *****
  • Posts: 212
  • Pogi/Ganda Points: 82
  • Gender: Male
  • Chinoks_capsighter the imaginative painter.......
Re: tony's 6LU8 push-pull power amp build
« Reply #18 on: March 03, 2011, 10:44:11 AM »
nice amp..... :)
Logged

Offline johnnylee

  • Size AAA Battery
  • ***
  • Posts: 52
  • Pogi/Ganda Points: 1
Re: tony's 6LU8 push-pull power amp build
« Reply #19 on: March 03, 2011, 11:32:39 AM »
nice amp sir tony +1 for you
Logged

Philippine Electronics Forum

Re: tony's 6LU8 push-pull power amp build
« Reply #19 on: March 03, 2011, 11:32:39 AM »
Pages: [1] 2 3 ... 7   Go Up
« previous next »
 

Privacy Policy

Contact Us: elabph@yahoo.com