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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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It is currently 01 Dec 2020, 19:44

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PostPosted: 08 Aug 2016, 20:40 
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Joined: 02 Oct 2014, 20:36
Posts: 48
thanks!!! all power section and preamp is finished,but now i'm very tired,tomorrow i will just ran the last wiring and tunr on the beast... :lildevil:


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PostPosted: 27 Aug 2016, 19:02 
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Joined: 02 Oct 2014, 20:36
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mwhouston wrote:
Looks good.

thanks!!! is finished now,and have a majestic sound!!! the s4 preamp make the sound more beautiful,more details and the 3 db gain switch is wonderful,this put out the details from old non compressed records...i'm using a 12ax7 matsushita,ecc 88 valvo and the kt's' 120...the only thing that i have change was eliminate the 100 k pot from de power amp.


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PostPosted: 04 Oct 2016, 02:20 
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Joined: 18 Feb 2015, 07:49
Posts: 7
Location: Italy
Hello ....
That the TU use? Do you think a 100mA DC it's OK, or is too much?

Thamks & Regards


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PostPosted: 24 Oct 2016, 19:14 
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nyalic wrote:
Hello ....
That the TU use? Do you think a 100mA DC it's OK, or is too much?

Thamks & Regards

hello!!! what is "TU" ? :beerchug:


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PostPosted: 23 Nov 2016, 02:52 
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Location: Italy
gonzalo guerrero wrote:
nyalic wrote:
Hello ....
That the TU use? Do you think a 100mA DC it's OK, or is too much?

Thamks & Regards

hello!!! what is "TU" ? :beerchug:


Hello ... :beerchug: sorry, TU is my typo error. I meant OT.
So i think about 60mA Primay DC it's ok ... ???


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PostPosted: 25 Nov 2016, 05:36 
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nyalic wrote:
gonzalo guerrero wrote:
nyalic wrote:
Hello ....
That the TU use? Do you think a 100mA DC it's OK, or is too much?

Thamks & Regards

hello!!! what is "TU" ? :beerchug:


Hello ... :beerchug: sorry, TU is my typo error. I meant OT.
So i think about 60mA Primay DC it's ok ... ???

i'm using kt's' 120 with 100 ma for each,my OT'S are 120 ma DC current handiling.


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PostPosted: 25 Nov 2016, 08:37 
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Location: Italy
gonzalo guerrero wrote:
i'm using kt's' 120 with 100 ma for each,my OT'S are 120 ma DC current handiling.


I was thinking of the James 6113 HS :

27Hz~60KHz-2dB
Maximum working current for primary: 60mA
10W

http://tctubes.com/james-transformers-JS-6113HS-pair.aspx


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PostPosted: 08 Jul 2017, 04:46 
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Joined: 02 Oct 2014, 20:36
Posts: 48
nyalic wrote:
gonzalo guerrero wrote:
i'm using kt's' 120 with 100 ma for each,my OT'S are 120 ma DC current handiling.


I was thinking of the James 6113 HS :

27Hz~60KHz-2dB
Maximum working current for primary: 60mA
10W

http://tctubes.com/james-transformers-JS-6113HS-pair.aspx

hello!!! why you don't go to bigger edcor's ?!?!? don't omit the two 10 uf capacitor placed before the 6n1p 47k resistor,...this capacitors affects very much the channel's separation and clear up the sound.


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PostPosted: 08 Jul 2017, 05:56 
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Joined: 02 Oct 2014, 20:36
Posts: 48
nyalic wrote:
gonzalo guerrero wrote:
i'm using kt's' 120 with 100 ma for each,my OT'S are 120 ma DC current handiling.


I was thinking of the James 6113 HS :

27Hz~60KHz-2dB
Maximum working current for primary: 60mA
10W

http://tctubes.com/james-transformers-JS-6113HS-pair.aspx

http://www.diyaudio.com/forums/tubelab/ ... plese.html go to edcor and be happy!!! :lildevil:


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PostPosted: 22 Apr 2020, 08:14 
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Joined: 19 Apr 2020, 15:41
Posts: 1
Hi wonder for this circuit, the resistors that don't have Watt rating marked, what kind of Watt rating should that be? Thks
MK

bsgd wrote:
Hello all!

So, I finally had some time to finish my SE KT88 amp.
The circuit is just like Mikael Abdellah's Single Ended (SE) KT88 Tube Amplifier Schematic.
Image

For the supply I used some UF5408 for the B+ and a couple 6A10 for the heaters (they are heatsinked as they dissipate a lot of power). Bypass caps for the driver stage are some Rubcon ZL and for the power stage standard Nichicon caps. My B+ is also lower to make sure tubes will live a long and happy life.

I'm getting some hum from it (and that was expected) because I didn't use any chokes. But I will put a pair of chokes in there as soon as I get them. Right now all filtering is RC.

Here are some pics:
Image
Attachment:
DSC02041small.JPG

Attachment:
DSC02048small.JPG


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