|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
||Thread Tools||Search this Thread|
|1st October 2009, 05:11 PM||#1|
Join Date: Sep 2009
Long time lurker,first time poster.I've decided to build am amp based on the Kismet 3 seen here:
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
|1st October 2009, 08:00 PM||#2|
diyAudio Senior Member
Join Date: Aug 2002
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.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Eagle vs. Sprint-Layout for PCB design/layout||hollowman||Parts||10||8th October 2012 07:13 PM|
|J-fet Zen Srpp ???||Circlomanen||Pass Labs||19||11th April 2010 10:27 PM|
|To SRPP or not?||duderduderini||Tubes / Valves||2||12th March 2007 04:01 PM|
|SRPP is....?||peranders||Tubes / Valves||8||19th December 2003 09:38 PM|
|Help with SRPP pre-||ktigerb||Tubes / Valves||11||10th October 2003 11:40 PM|
|New To Site?||Need Help?|