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Old 25th June 2005, 10:15 PM   #11
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This is a nice discussion about the influence of power supply in the amp's sound! Have any of you tried a regulated PS? And what kind of regulation? Vantages, disadvantages...or why would you do/don't do it?
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Old 25th June 2005, 10:17 PM   #12
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I've used a tube regulated power supply in my preamp and it makes a HUGE difference but then again i've used a pair of big chokes but the sound is more open since i put the vr tubes in...
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Old 25th June 2005, 11:47 PM   #13
kmtang is offline kmtang  Canada
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I used tube regulatred power supply for my Matissee line amp. I then modified it so that it is switchable between tube regulator and LCLC filtering only. The LCLC sounds more sweet and smooth.

Of course, the last cap in the PS have big impact to the sound.


Johnny
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Old 25th June 2005, 11:54 PM   #14
sklimek is offline sklimek  United States
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If one does decide to go the CLCLC or LCLC and wanting a surface mount this James choke can provide it in one package.
It does 2.5H + 2.5H or wire it in series for 10H, not hard to look at either...

http://euphoniaaudio.netfirms.com/ea...5a40c700cbdf8d
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Old 25th June 2005, 11:55 PM   #15
RE 604 is offline RE 604  Germany
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Hello ,
I always use tube - regulated power spplies in my single ended amps and for me , it sounds best with one supply for one channel .
In the picture you can see two supplies with EZ 80 , EL 86 , EF 80 and 85a2 .
Regards , Alex .

Click the image to open in full size.
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Old 26th June 2005, 12:46 AM   #16
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Konnichiwa,

Quote:
Originally posted by ErikdeBest
This is a nice discussion about the influence of power supply in the amp's sound! Have any of you tried a regulated PS? And what kind of regulation? Vantages, disadvantages...or why would you do/don't do it?
I tried all sorts of approaches and I find that you need to consider amplifier and PSU as one and tune them together. Do that and you can get very good results from any configuration that gets the basic right.

Sayonara
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Old 26th June 2005, 05:13 PM   #17
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Here's the schematic for the PSU in my 6SN7 linestage exactly as built.It's amazingly clean and detailed.Next job is regulated heater supplies

The 0.047uF cap should have been drawn AFTER the OD3 pair.DOH!!
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Old 26th June 2005, 05:22 PM   #18
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Here's how it should be
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Old 27th June 2005, 02:42 PM   #19
kmtang is offline kmtang  Canada
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Hi Slimek,

I am just wondering why you employed a RC filter in the last stage of your power supply. I added a RC filter of 250-ohm 100uF for the last stage which forms CLCRC so that I could lower the B+ from 455V to 430Vdc for my 300B SE amp.

With this change, my 300B amp sound rather differently. It has more sweet and detailed sound.
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Old 27th June 2005, 03:22 PM   #20
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If you mean the 5k pots before the 6SN7 regulator then I wanted to be able to tweak the voltage from 300v to 225v to use different tubes,eg:6SN7/5692 or it also works with 6SL7 but gives a lot more gain.The extra PIO caps before the anodes also make the sound a lot smoother and detailed.Bass is incredible.I tried it without the 6SN7/32uF and it sounds better with than without.
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