Pictures of your Tubelab amp - Page 9

Pez · 5th March 2010, 02:59 PM

Beautiful work! Looks like you are very meticulous and creative. You are making me jealous by saying you like it better than the Simple SE.

Nikon1975 · 5th March 2010, 09:24 PM

Pictures were taken with a Canon G10.
For the umbelical, in the amp the cable has no connector, goes directly in the chassis. The cable is done with two coaxials (for B+ and B-) normal cable for grounging (shielding are connected only on PSU side) and shielded twisted pair for the AC6.3.

On the side of the PSU, I did not decide yet, as you can see the psu is still in progress. Now I connect wires one by one, I almost destroyed everything with a stupid mistake.

The idea is to try the Salas HV shunt regulator, once the PCBs are ready.

I have some connectors that look like valve sockets, I think I am going to use that.

D.

Evenharmonics · 6th March 2010, 09:56 PM

Quote:

Originally Posted by Nikon1975

Pictures were taken with a Canon G10.

Not Nikon?

Nikon1975 · 7th March 2010, 12:06 PM

I was lazy to use the BIG ONE ! :-)

Nikon1975 · 30th March 2010, 02:34 PM

This is the Simple SE, that shares the PSU with the TubelabSE posted above.

D.

Pez · 30th March 2010, 02:52 PM

Ahh very nice. In my opinion, ditch the EL34s and use some KT88s. I like the Penta labs KT88s. They have a much fuller sound with a deeper soundstage. Interesting use of a "universal" power supply.

Nikon1975 · 30th March 2010, 09:32 PM

The idea of the "universal" power supply came by chance. I live in Japan, but I will move in few years back to Europe, so I did not want to buy a bunch of 100 V power transformers, and here is very difficult to find multi voltage transformers.
The Tubelab SE uses the 5UGB as rectifier, that gives me 380 V B+. The SimpleSE uses the 5AR4 that gives me between 410 and 420 V depending on the tubes.

The PS has good components, the first cap is a 22uF Solen fastcap and the second a 200uF Film Mylar. In between a 10H 81DCR choke. I had to add the B- part to support the tubelabSE.

At the moment the B- circuit, is manually disconnected when I use the SimpleSE, I am not sure if this is really necessary. Any input ? I would love to solder it.

I am curious to see the impact of the PS on the sonic, so next I want to assemble the worst possible PS, using a 2$ bridge and cheap caps to see it my non-gifted hears can hear the difference. Next I would like to try various filters and regulators.

BR,

Davide

P.R. Audio · 30th May 2010, 04:04 PM

Here is a picture of the P2P preamp to go with my P2P S.E. amp. This preamp has a volume control as well as a Treble and Bass control. It is the perfect addition to the amp. I got the schematic off the net a while back. All the caps are Russian NOS PIO.

Junior · 11th June 2010, 04:24 PM

another proud builder of Tubelab Simple Single Ended.

tigrine · 11th June 2010, 06:31 PM

Nikon1975 and Junior what do you have for the ouput transformer 3.5k, 5k?
What is the B+? 450 volts and the resistor for the bias ? 560k 720k?

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5th March 2010, 02:59 PM	#81
Pez diyAudio Member Join Date: Jan 2010	Beautiful work! Looks like you are very meticulous and creative. You are making me jealous by saying you like it better than the Simple SE.

5th March 2010, 09:24 PM	#82
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	Pictures were taken with a Canon G10. For the umbelical, in the amp the cable has no connector, goes directly in the chassis. The cable is done with two coaxials (for B+ and B-) normal cable for grounging (shielding are connected only on PSU side) and shielded twisted pair for the AC6.3. On the side of the PSU, I did not decide yet, as you can see the psu is still in progress. Now I connect wires one by one, I almost destroyed everything with a stupid mistake. The idea is to try the Salas HV shunt regulator, once the PCBs are ready. I have some connectors that look like valve sockets, I think I am going to use that. D.

7th March 2010, 12:06 PM	#84
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	I was lazy to use the BIG ONE ! :-)

30th March 2010, 02:52 PM	#86
Pez diyAudio Member Join Date: Jan 2010	Ahh very nice. In my opinion, ditch the EL34s and use some KT88s. I like the Penta labs KT88s. They have a much fuller sound with a deeper soundstage. Interesting use of a "universal" power supply.

30th March 2010, 09:32 PM	#87
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	The idea of the "universal" power supply came by chance. I live in Japan, but I will move in few years back to Europe, so I did not want to buy a bunch of 100 V power transformers, and here is very difficult to find multi voltage transformers. The Tubelab SE uses the 5UGB as rectifier, that gives me 380 V B+. The SimpleSE uses the 5AR4 that gives me between 410 and 420 V depending on the tubes. The PS has good components, the first cap is a 22uF Solen fastcap and the second a 200uF Film Mylar. In between a 10H 81DCR choke. I had to add the B- part to support the tubelabSE. At the moment the B- circuit, is manually disconnected when I use the SimpleSE, I am not sure if this is really necessary. Any input ? I would love to solder it. I am curious to see the impact of the PS on the sonic, so next I want to assemble the worst possible PS, using a 2$ bridge and cheap caps to see it my non-gifted hears can hear the difference. Next I would like to try various filters and regulators. BR, Davide

11th June 2010, 04:24 PM	#89
Junior diyAudio Member Join Date: Jun 2004 Location: Singapore	another proud builder of Tubelab Simple Single Ended.

11th June 2010, 06:31 PM	#90
tigrine diyAudio Member Join Date: Oct 2006	Nikon1975 and Junior what do you have for the ouput transformer 3.5k, 5k? What is the B+? 450 volts and the resistor for the bias ? 560k 720k?

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