diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Tubes / Valves (http://www.diyaudio.com/forums/tubes-valves/)
-   -   45 Type Push/Pull Amps (http://www.diyaudio.com/forums/tubes-valves/231183-45-type-push-pull-amps.html)

jcmusic 2nd March 2013 04:45 PM

45 Type Push/Pull Amps
 
45 Type Push/Pull
How many here use or have heard one of these type amps? What are the important factors here in this being able to produce quality sound of this tube with out the noise???
Can this amp achieve the sound quality of an SET amp?

Vinylsavor 2nd March 2013 05:06 PM

Quote:

Originally Posted by jcmusic (Post 3392638)
45 Type Push/Pull
How many here use or have heard one of these type amps?

So far I have used the 45 only in Single Ended but will build a PP amp with them some time.

Quote:

Originally Posted by jcmusic (Post 3392638)
What are the important factors here in this being able to produce quality sound of this tube with out the noise???

The same applies as for any other type amp. Why would it be different with the 45? What do you mean with out the noise? A 45 amp can be designed as quiet as you wish, no matter if PP or SE

Quote:

Originally Posted by jcmusic (Post 3392638)
Can this amp achieve the sound quality of an SET amp?

If you want the SE sound character that stay SE IMHO

Best regards

Thomas

ErikdeBest 2nd March 2013 06:06 PM

Some information: http://www.diyaudio.com/forums/tubes...pull-45-a.html

Quote:

So far I have used the 45 only in Single Ended but will build a PP amp with them some time.
as the thread is about PP, I think it is not a problem to ask if you can tell a bit more about your ideas regarding PP implementaion? I learned a lot from your publications on SE, LCRs, amplifier construction, damper diodes usage, etc, and I am curious how you would tackle PP!

jcmusic 2nd March 2013 06:57 PM

Thomas,
Thanks alot for replying, it has come to my attention recently that a 45 PP amp is available. I didn't know the 45 tube was ever used in this configuration and was wondering about the noise control. I have been led to believe that more power equals more noise...

Vinylsavor 2nd March 2013 06:59 PM

Hi Erik,

I did not really start to work on it yet. I will rebuild a fully differential phono stage design which I had years ago first. I will probably apply some aspects from that design. Fully differential from in to out, choke in the cathode, common to both tubes. IT coupled.

But its too early really...

Best regards

Thomas

Vinylsavor 2nd March 2013 07:06 PM

Hi!

Quote:

Originally Posted by jcmusic (Post 3392819)
I have been led to believe that more power equals more noise...

Not necessarily. Push Pull circuits actually have better power supply noise rejection as Single ended, so they would typically be quieter than a SE with a similar power supply.

Best regards

Thomas

kevinkr 2nd March 2013 07:12 PM

In properly designed SE or PP amplifiers achievable output power has virtually nothing to do with noise assuming that system gains are distributed in a reasonable manner. I'd read Pano's treatise on this topic. (Gain Distribution)

Skip Pack 2nd March 2013 07:55 PM

from a post three years ago:
Marcel and Clovis

I heard Marcel and Clovis by Phil Sieg at VSAC two days before 9/11. It was
driving some Audio Classic horns, and I have not heard better. Perhaps some
as good, but none better.

http://www.tubesrit.com/audio/albums...s_DHT_PP45.pdf


still true for me,

Skip

JonSnell Electronic 2nd March 2013 07:57 PM

Hi. The link http://www.tubesrit.com/audio/albums...s_DHT_PP45.pdf is not working.

Skip Pack 2nd March 2013 08:02 PM

I don't know why it picked up the ellipsis. This should work:

http://www.tubesrit.com/audio/albums...s_DHT_PP45.pdf

Skip


All times are GMT. The time now is 06:25 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2