300b Push Pull Interstage Tsf

brsanko · 1st March 2005, 07:24 PM

I LIKE WHAT I'VE BEEN READING ABOUT THE SUN AUDIO 300B PUSH PULL AMP WITH AN INTERSTAGE TRANSFORMER FOR THE PHASE SPLITTER. DOES ANYONE HAVE A SCHEMATIC FOR SOMETHING SIMILAR TO THIS. I WANT TO BUILD IT.

audiousername · 1st March 2005, 11:25 PM

Allow me to intoduce you to the "Caps Lock" key. Please use it wisely.

It isn't all that complex, if it is a SE stage driving a PP stage, you have the driver with the primary in the anode circuit (like an output stage), with the centre tap of the IST grounded, and each side going to a grid.

Have a look at Claudo Bonavolta's phase splitters article. The transformer is the last one on that page.

Brett · 2nd March 2005, 12:11 AM

http://www.nutshellhifi.com/triode1.html

GaryW · 2nd March 2005, 01:31 AM

Not at all sure about the Sun Audio schematics. Here is my main amp. Sounds quite nice.

300B push-pull direct coupled driver amp

Looks pretty nice too:

300B amp photo

Gary

jrdmedford · 2nd March 2005, 04:46 AM

This is exactly the ckt to use and will work just fine with 300Bs.
Rather than use the Lundahl LL1635, you'd want to buy a Lundahl
1660/10 and then strap it for "Alt V" SE to PP. The 1660 is better
suited for this application.

I built an amp for someone using this transformer. In my case, I
used an ECC99 driving the Lundahl driving PP 2A3. You can use
the 5842WA or the 6C45 with this part. All three tubes are an excellent
choice and the results are very, very good! The transformers will cost
you $200 for the pair, but well worth the performance and ckt simplicity.

To buy these, www.kandkaudio.com

-- Jim

analog_sa · 2nd March 2005, 05:54 AM

Sun Audio never seem to get too adventurous with their circuits and the same is true for this amp. I greatly prefer this

GaryW · 2nd March 2005, 12:48 PM

Quote:

Originally posted by GaryW
Not at all sure about the Sun Audio schematics. Here is my main amp. Sounds quite nice.

300B push-pull direct coupled driver amp

Looks pretty nice too:

300B amp photo

Gary

Hmm, looks like gallery pictures won't load outside of audiocircles. Let's try this again:

Stixx · 2nd March 2005, 01:46 PM

it works...

I had to copy the adress in my second browser though...

1st March 2005, 07:24 PM	#1
brsanko diyAudio Member Join Date: Dec 2003 Location: Duluth, MN	300b Push Pull Interstage Tsf I LIKE WHAT I'VE BEEN READING ABOUT THE SUN AUDIO 300B PUSH PULL AMP WITH AN INTERSTAGE TRANSFORMER FOR THE PHASE SPLITTER. DOES ANYONE HAVE A SCHEMATIC FOR SOMETHING SIMILAR TO THIS. I WANT TO BUILD IT. __________________ PASSIONN

1st March 2005, 11:25 PM	#2
audiousername diyAudio Member Join Date: Jul 2004 Location: Melbourne, Victoria	Allow me to intoduce you to the "Caps Lock" key. Please use it wisely. It isn't all that complex, if it is a SE stage driving a PP stage, you have the driver with the primary in the anode circuit (like an output stage), with the centre tap of the IST grounded, and each side going to a grid. Have a look at Claudo Bonavolta's phase splitters article. The transformer is the last one on that page. __________________ Jason

2nd March 2005, 04:46 AM	#5
jrdmedford diyAudio Member Join Date: Mar 2004 Location: Medford, MA	Google for Ralph Powers PP 6B4G This is exactly the ckt to use and will work just fine with 300Bs. Rather than use the Lundahl LL1635, you'd want to buy a Lundahl 1660/10 and then strap it for "Alt V" SE to PP. The 1660 is better suited for this application. I built an amp for someone using this transformer. In my case, I used an ECC99 driving the Lundahl driving PP 2A3. You can use the 5842WA or the 6C45 with this part. All three tubes are an excellent choice and the results are very, very good! The transformers will cost you $200 for the pair, but well worth the performance and ckt simplicity. To buy these, www.kandkaudio.com -- Jim

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2nd March 2005, 12:11 AM	#3
Brett diyAudio Member Join Date: Jan 2002	http://www.nutshellhifi.com/triode1.html

2nd March 2005, 01:31 AM	#4
GaryW diyAudio Member Join Date: Feb 2003 Location: University Place, WA	Not at all sure about the Sun Audio schematics. Here is my main amp. Sounds quite nice. 300B push-pull direct coupled driver amp Looks pretty nice too: 300B amp photo Gary

2nd March 2005, 01:46 PM	#8
Stixx diyAudio Member Join Date: Sep 2003 Location: Southern Germany	it works... I had to copy the adress in my second browser though...

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