DHT with TDA1541A in a NOS DAC?

manp111 · 26th March 2011, 11:44 PM

Does anyone have experience with building a NOS DAC using the TDA1541A Chip and DHT in the analog section?

dowdylama · 30th March 2011, 10:22 AM

Yes, I've experimented with it.
I basically used the Ciuffoli circuit with a 46 output stage.

Jim

revintage · 30th March 2011, 11:55 AM

I recently designed a DHT/TDA1545. Sounds great. Bardis wanted to upgrade some DAC from diyparadise. Got help from Thorsten L. to optimize the chip.

About the 1541 it should be no problem with passive load and directly into the grid.

Sorry, the thread is in Swedish.

HiFiForum.nu - NOS RÖR DAC

manp111 · 30th March 2011, 07:21 PM

How Do you guys get enough gain from the 46 and 3A5?

The TDA1541A put out 25mV.
Some people use the 6C45 tube which has an amplification factor of 52.

revintage · 30th March 2011, 08:34 PM

If you want more gain you can build a cascode with a 2SK170 below and 3A5 on top. No problem with gain of 3-40dB

26th March 2011, 11:44 PM	#1
manp111 diyAudio Member Join Date: Jun 2010 Location: Austin, Texas	DHT with TDA1541A in a NOS DAC? Does anyone have experience with building a NOS DAC using the TDA1541A Chip and DHT in the analog section?

30th March 2011, 11:55 AM	#3
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	I recently designed a DHT/TDA1545. Sounds great. Bardis wanted to upgrade some DAC from diyparadise. Got help from Thorsten L. to optimize the chip. About the 1541 it should be no problem with passive load and directly into the grid. Sorry, the thread is in Swedish. HiFiForum.nu - NOS RÖR DAC __________________ Brgds Lars

30th March 2011, 08:34 PM	#5
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	If you want more gain you can build a cascode with a 2SK170 below and 3A5 on top. No problem with gain of 3-40dB __________________ Brgds Lars

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30th March 2011, 10:22 AM	#2
dowdylama diyAudio Member Join Date: Mar 2005 Location: western North Carolina	Yes, I've experimented with it. I basically used the Ciuffoli circuit with a 46 output stage. Jim

30th March 2011, 07:21 PM	#4
manp111 diyAudio Member Join Date: Jun 2010 Location: Austin, Texas	How Do you guys get enough gain from the 46 and 3A5? The TDA1541A put out 25mV. Some people use the 6C45 tube which has an amplification factor of 52.

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