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 Post subject: Re: GU29 Amplifier
PostPosted: 01 Aug 2013, 07:05 
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Joined: 06 Jun 2008, 18:23
Posts: 4883
Location: Australia
What of the earlier schematic?

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
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 Post subject: Re: GU29 Amplifier
PostPosted: 01 Aug 2013, 10:59 
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Joined: 27 May 2012, 07:21
Posts: 26
Location: Romania
Ok.

Now, I've got the permission from Mr. Lazaroiu and this is the final schematic.
As dual opamp, I used, like I wrote, LF353 instead of the original from schematic, LT1058.
It result a good sound and enough atac for GU29. Of course, it's my personal opinion obtained from the amplifier sound.

Good luck and try the schematic, it worth! It sound and work great!


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 Post subject: Re: GU29 Amplifier
PostPosted: 02 Aug 2013, 10:43 
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Joined: 18 May 2010, 09:39
Posts: 1
Piotr67 wrote:
Ok.

Now, I've got the permission from Mr. Lazaroiu and this is the final schematic.
As dual opamp, I used, like I wrote, LF353 instead of the original from schematic, LT1058.
It result a good sound and enough atac for GU29. Of course, it's my personal opinion obtained from the amplifier sound.

Good luck and try the schematic, it worth! It sound and work great!

*************************************************************************************************
Congratulations on this project!
I recommend another schematic with excellent performance that can be easily framed in Class HI-FI.
Only 4 Double vacuum tubes 2XE92CC and 2xGU29 achieve an excellent amplifier all tube


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 Post subject: Re: GU29 Amplifier
PostPosted: 02 Aug 2013, 19:15 
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Joined: 06 Jun 2008, 18:23
Posts: 4883
Location: Australia
Of the schematics I have seen for this tube the first one posted appeals the most.

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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 Post subject: Re: GU29 Amplifier
PostPosted: 17 Aug 2013, 09:50 
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Joined: 27 May 2012, 07:21
Posts: 26
Location: Romania
I would like to show you another images at the better rezolution of my amplifier.

:headphones: :beerchug:


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 Post subject: Re: GU29 Amplifier
PostPosted: 17 Aug 2013, 18:04 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
Nice build. I'm glad you covered the open frame trannies. Good work, it looks smart.

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Projects: "Lagoon" - tube preamp with cathode follower | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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 Post subject: Re: GU29 Amplifier
PostPosted: 14 Jun 2018, 01:48 
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Joined: 03 Apr 2018, 04:24
Posts: 1
Hello, I would like to know how the amplifier works after years, were any improvements / modifications made?
Best regards, Piotr.


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