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Author Topic: el34 killer amp  (Read 36739 times)

Offline Hens

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Re: el34 killer amp
« Reply #40 on: November 27, 2010, 10:53:06 AM »
Mario, will 274b's directly replace the 5r4gy
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Offline kajak12

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Re: el34 killer amp
« Reply #41 on: November 27, 2010, 12:33:30 PM »
i dont know ask paul he knows the voltage and current draw
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Offline stevenvalve

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Re: el34 killer amp
« Reply #42 on: November 27, 2010, 01:15:16 PM »
Quote from: Hens on November 27, 2010, 10:53:06 AM
Mario, will 274b's directly replace the 5r4gy
I believe there is big current there, check with paul.
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Offline Hens

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Re: el34 killer amp
« Reply #43 on: November 30, 2010, 09:56:55 PM »
I just rolled my newly received red base 6sn7's...

Wow, hello mid range, where did you come from?
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Offline kajak12

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Re: el34 killer amp
« Reply #44 on: November 30, 2010, 11:38:56 PM »
Quote from: Hens on November 30, 2010, 09:56:55 PM
I just rolled my newly received red base 6sn7's...

Wow, hello mid range, where did you come from?
6sl7 is what you use now? (5691)
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Offline Hens

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Re: el34 killer amp
« Reply #45 on: December 01, 2010, 12:02:00 AM »
I went to 6sn7 Mario, on the lookout for some nice red base 6sl7.

Paul said it would be fine to use the 6sn7 it would just lower the gain.
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Offline kajak12

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Re: el34 killer amp
« Reply #46 on: December 01, 2010, 01:04:00 AM »
Quote from: Hens on December 01, 2010, 12:02:00 AM
I went to 6sn7 Mario, on the lookout for some nice red base 6sl7.

Paul said it would be fine to use the 6sn7 it would just lower the gain.
cool do you notice lower gain?  i must try some
get some ecc32 mullards they are the goods
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Offline Hens

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Re: el34 killer amp
« Reply #47 on: December 01, 2010, 01:44:26 AM »
Yeah, I get some more travel from the volume pot, those mullards a bit too expensive haha. I managed to get two pairs of these red bases for 140 posted :D
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Offline zenelectro

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Re: el34 killer amp
« Reply #48 on: December 13, 2010, 09:02:27 AM »
Just saw this thread over at DIYA.

http://www.diyaudio.com/forums/tubes-valves/170178-odd-crazy-output-transformer-design-2.html#post2395485

The OP transformers were made by Alkay Transformers over 25 years ago when I working there.
The original owner Lothar Keidel, was a German and a transformer design genius. 

Total of 15 sections vertically 'Pi' wound for greater bandwidth and super tight P to S coupling.

The amps were KT88 push pull / class A / no global FB. 

cheers

Terry




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tuyen

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Re: el34 killer amp
« Reply #49 on: December 13, 2010, 01:11:35 PM »
That is an interesting looking output tranny Terry!

One of the links you posted points to another link which I breifly read through and thought it was really interesting and educational.

http://www.lenardaudio.com/education/14_valve_amps.html

It talks about different aspects in the build and design of valve amps.  Worth a gander !


Tuyen
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Offline kajak12

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Re: el34 killer amp
« Reply #50 on: December 14, 2010, 01:00:56 AM »
lenardaudio some great reading and also a lot of sh!t
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Offline zenelectro

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Re: el34 killer amp
« Reply #51 on: December 14, 2010, 11:46:51 AM »
Quote from: kajak12 on December 14, 2010, 01:00:56 AM
lenardaudio some great reading and also a lot of shiezer!

Yeah - it's a mixed bag for sure.

The purely technical explanations of power supplies, amps etc with schematics
are great and recommended reading.

Some of the other stuff is a bit of a worry.

T
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Offline kajak12

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Re: el34 killer amp
« Reply #52 on: July 20, 2011, 10:30:28 PM »
Since i have tuyens amp in my possesion i thought i could play with it,i have found feedback resistors and a little cap to play with.
changed the value and also tried a different cap silver mica,the silver mica is sh!t does not work with this amp

i have some resistors coming from england to play with,so much can be done with just a few changes of parts who needs to change amps?
I could no belive the difference in sound just a little cap made in the feedback circuit wow wow.tuyen stop me playing with your amp
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Offline kajak12

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Re: el34 killer amp
« Reply #53 on: July 25, 2011, 11:21:21 PM »
Some photo's from sydney which show my killer el34 with a new heart MAINS TRANSFORMER custom made just like the killer dac transformers,Paul is rebuilding the power supply just to fit the tiny transformer on the chassis.
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Offline Jehuty

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Re: el34 killer amp
« Reply #54 on: July 25, 2011, 11:46:13 PM »
Quote from: kajak12 on July 25, 2011, 11:21:21 PM
Some photo's from sydney which show my killer el34 with a new heart MAINS TRANSFORMER custom made just like the killer dac transformers,Paul is rebuilding the power supply just to fit the tiny transformer on the chassis.

Nice...will Paul install B+ switch for your amp Mario?
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Offline kajak12

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Re: el34 killer amp
« Reply #55 on: July 25, 2011, 11:52:07 PM »
Quote from: Jehuty on July 25, 2011, 11:46:13 PM
Quote from: kajak12 on July 25, 2011, 11:21:21 PM
Some photo's from sydney which show my killer el34 with a new heart MAINS TRANSFORMER custom made just like the killer dac transformers,Paul is rebuilding the power supply just to fit the tiny transformer on the chassis.

Nice...will Paul install B+ switch for your amp Mario?
look at the top photo left hand side near a rectifier valve the switch is mounted and ready for work this will save my valves  ;)
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Offline Jehuty

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Re: el34 killer amp
« Reply #56 on: July 26, 2011, 12:02:47 AM »
Quote from: kajak12 on July 25, 2011, 11:52:07 PM
Quote from: Jehuty on July 25, 2011, 11:46:13 PM
Quote from: kajak12 on July 25, 2011, 11:21:21 PM
Some photo's from sydney which show my killer el34 with a new heart MAINS TRANSFORMER custom made just like the killer dac transformers,Paul is rebuilding the power supply just to fit the tiny transformer on the chassis.

Nice...will Paul install B+ switch for your amp Mario?
look at the top photo left hand side near a rectifier valve the switch is mounted and ready for work this will save my valves  ;)

Ooohhhh!!!! VERY NICE!!! Please update us what you think about the sound after you get the amp back!
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Offline Hens

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Re: el34 killer amp
« Reply #57 on: July 26, 2011, 10:35:24 PM »
Quote from: kajak12 on July 20, 2011, 10:30:28 PM
tuyen stop me playing with your amp

I'll help you by lending you one of mine. :P

Your amp is looking really clean Mario. Paul is doing some great work with it.
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Offline kajak12

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Re: el34 killer amp
« Reply #58 on: July 26, 2011, 11:07:58 PM »
Quote from: Hens on July 26, 2011, 10:35:24 PM
Quote from: kajak12 on July 20, 2011, 10:30:28 PM
tuyen stop me playing with your amp

I'll help you by lending you one of mine. :P

Your amp is looking really clean Mario. Paul is doing some great work with it.
bring it over hens for some tweaking i just had a delivery of some resistors that i could try on your amp,when my returns all the spare time will be spent tuning the sucker again
« Last Edit: July 26, 2011, 11:09:38 PM by kajak12 »
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Offline kajak12

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Re: el34 killer amp
« Reply #59 on: July 27, 2011, 08:57:14 PM »
The killer el34 is ALIVE  its breathing photo's coming soon  next week its being shipped
« Last Edit: July 28, 2011, 11:57:06 AM by kajak12 »
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