SRPP layout - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st October 2009, 04:11 PM   #1
diyAudio Member
 
Join Date: Sep 2009
Location: Asheville,N.C.
Default SRPP layout

Hi,all-

Long time lurker,first time poster.I've decided to build am amp based on the Kismet 3 seen here:

http://www.positive-feedback.com/Issue1/Kismet.htm

I figure I'm gonna learn how to implement power supplies,for sure

Assuming a two-channel amp with a single power supply in one chassis,my question -(and this may simply be a thoeretical exercise)is there any advantage to configuring the 2 voltage amplifiers in one twin-triode envelope and the two plate load regulators in the other envelope?

I'm thinking of using the 6N1P which is shieldeed between triode sections so it really does,nt matter all that much,but I'm curious!(and maybe naieve.)Of course,I'm open to any alternative suggestions to the 6N1P-
Thanks,I've learned a lot so far hanging here at this site(or not

Sincerely,Joe
  Reply With Quote
Old 1st October 2009, 07:00 PM   #2
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

You could use the triode's sections that way but keep in mind that often those small double triodes are twin triodes.
I.e. they're supposed to be matched.
This important to to good operation of a circuit that tries to mimic P-P operation.
L and R channel tubes are therefore best kept separated. It also keeps the chance of interchannel crosstalk to a minimum, depending on your layout.

Furthermore, the SRPP circuit does not exhibit good power supply rejection. So, if you decide to go for a common supply, you'd better make a good one.

Also, there's an error in the Kismet schematic in that the grid of the upper triode is left floating. It should be connected to the bottom of the uppermost cathode resistor.
There is no mention in the text about heater to cathode voltages but in general you should check the tube data about this.

Contrary to the author's method of making the amp seem faster by reducing the filtering caps, I'd rather see the cathode bypass cap across the SRPP's bottom cathode resistor removed.
It will reduce gain a little but it will sound cleaner and exhibit better transient response IME.

Cheers,
__________________
Frank
  Reply With Quote
Old 2nd October 2009, 03:52 PM   #3
diyAudio Member
 
Join Date: Sep 2009
Location: Asheville,N.C.
Thanks,Frank!...off I go,then

Joe
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Eagle vs. Sprint-Layout for PCB design/layout hollowman Parts 11 12th January 2014 09:01 PM
J-fet Zen Srpp ??? Circlomanen Pass Labs 19 11th April 2010 09:27 PM
To SRPP or not? duderduderini Tubes / Valves 2 12th March 2007 03:01 PM
SRPP is....? peranders Tubes / Valves 8 19th December 2003 08:38 PM
Help with SRPP pre- ktigerb Tubes / Valves 11 10th October 2003 10:40 PM


New To Site? Need Help?

All times are GMT. The time now is 05:35 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