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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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PostPosted: 23 Nov 2011, 04:32 
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Joined: 18 Oct 2011, 03:15
Posts: 14
So, on the:
good side (pin1 0.01v, pin2 0.02v, pin3 -23.8v, pin4 0.02v, pin5 23.8v)
bad side (pin1 0.01v, pin2 -22.5v, pin3 -24.0v, pin4 -23.0v, pin5 24.0v)
I am going to remove the chip from the board, check the voltages at the holes where it was, should confirm its the chip.


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PostPosted: 04 Feb 2012, 14:36 
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Joined: 25 Jan 2012, 12:11
Posts: 4
I am looking for some DIY fun and this looks like a nice little project for me (I love the sound of a tube amp, but am a little scared of the high-volts, got a good shock a few years back, about 20amps across the chest, darn near killed me). Any tips you can throw at a first time DIY'er? How is shipping from AUS? I am in the USA... I want to get everything ordered and shipped in one box if possible (probably order their headphone amp too). Source will either be my iPod or my computer. If I can make it fit, I will put it in my AV cabinet, but space is at a premium.


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PostPosted: 05 Feb 2012, 01:51 
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Joined: 06 Jun 2008, 18:23
Posts: 4870
Location: Australia
trikster wrote:
I am looking for some DIY fun and this looks like a nice little project for me (I love the sound of a tube amp, but am a little scared of the high-volts, got a good shock a few years back, about 20amps across the chest, darn near killed me). Any tips you can throw at a first time DIY'er? How is shipping from AUS? I am in the USA... I want to get everything ordered and shipped in one box if possible (probably order their headphone amp too). Source will either be my iPod or my computer. If I can make it fit, I will put it in my AV cabinet, but space is at a premium.

Oatley ships all over the world just order direct from them.

_________________
Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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PostPosted: 09 May 2012, 01:22 
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Joined: 08 May 2012, 18:27
Posts: 1
Does anyone know where I can get an AC power cord for the power supply on the OATELY K281
kit amp ??

Thanks in advance


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PostPosted: 09 May 2012, 09:27 
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Joined: 05 Nov 2010, 21:07
Posts: 702
Location: South East US - Tennessee
kiwi88 wrote:
Does anyone know where I can get an AC power cord for the power supply on the OATELY K281
kit amp ??


Check your local electronics parts supplier -or- check online. Nothing special about the cord, it's common.
Power cord - North American Mkt

_________________
The key to a successful build is to keep the smoke IN the circuit.
-Les

We cannot solve our problems with the same thinking we used when we created them. - Albert Einstien
_________________________________
LM380 Bridged Guitar Amp, Oatley K301 Phono Pre-amp, Oatley K272 Headphone Amp, Tube proto-board


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PostPosted: 16 Apr 2017, 00:06 
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Joined: 15 Apr 2017, 23:49
Posts: 2
Hi guys, I have had two of these oatley K281 kits sitting for a while. Will start assembling them pronto. Thanks for some great ideas and thank you mwhouston for the schematic. Any suggestions on increasing power output closer to capabilities of the LM1875?

Thanks
Gerry


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PostPosted: 16 Apr 2017, 19:50 
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Joined: 06 Jun 2008, 18:23
Posts: 4870
Location: Australia
gerryjames wrote:
Hi guys, I have had two of these oatley K281 kits sitting for a while. Will start assembling them pronto. Thanks for some great ideas and thank you mwhouston for the schematic. Any suggestions on increasing power output closer to capabilities of the LM1875?

Thanks
Gerry


Build and have a listen. I have found mine noisy but where I'm using it that's not s problem.

_________________
Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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PostPosted: 16 Apr 2017, 20:14 
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Joined: 15 Apr 2017, 23:49
Posts: 2
Will do that today?


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