One more 4P1L SE - Page 57

FRUGIVO · 19th March 2013, 10:00 AM

really great tube for audio
surprising!

FRUGIVO · 09:46 AM

signal source
dac pcm63p NOS
round wire potentiometer 25 ohm.for i / v converter and volume control
PC900 triode with plate choke

AZ1 power supply channels individualized rl

regal · 23rd March 2013, 09:57 AM

Quote:

Originally Posted by FRUGIVO

signal source
dac pcm63p NOS
round wire potentiometer 25 ohm.for i / v converter and volume control
PC900 triode with plate choke

Wrong thread ?

andyjevans · 23rd March 2013, 10:01 AM

Very nice work! Did you build your speakers yourself? They're really something.

Andy

FRUGIVO · 23rd March 2013, 11:47 AM

Quote:

Originally Posted by regal

Wrong thread ?

you're right
is to follow my thread
sorry will not happen again

FRUGIVO · 23rd March 2013, 11:54 AM

Quote:

Originally Posted by andyjevans

Very nice work! Did you build your speakers yourself? They're really something.

Andy

with the help of a carpenter friend
to assemble and glue the pieces
to cut the pieces was used
a machine assisted with AutoCAD
I show my support design
iron built

andyjevans · 23rd March 2013, 12:57 PM

Brilliant!

regal · 23rd March 2013, 02:17 PM

I am a bit glad speakers came up, for as much info on SET amps there is very little info on this site for modest high efficiency speakers, what are people without cad assisted machines doing for speakers. Are something like econo waveguides a good route to take for and amp this small powered. I have a pair of BR Fostex 127E but they just don't have any bass, I don't know where to look for info on modest budget horn setups.

mogliaa · 1st April 2013, 04:46 PM

For those interested in simulating their designs with SPICE, I developed a slightly refined DHT composite model using my own set of curves. A model is available for PSE as well.
Difference is on KP parameter which drives linearity of the model. With Dmitry's model you get a slightly worse THD response when swinging the 4P1L to its limits.

4P1L triode SPICE model | Bartola Valves

Hope this helps
Ale

iko · 1st April 2013, 05:11 PM

Thanks Ale. As I mentioned before, if you ever find the time to trace the 26 would be great. Dmitry's model of the 26 I think is based on the datasheet, not a working sample.

23rd March 2013, 09:32 AM	#562
FRUGIVO diyAudio Member Join Date: Feb 2010 Location: Burgos	signal source dac pcm63p NOS round wire potentiometer 25 ohm.for i / v converter and volume control PC900 triode with plate choke AZ1 power supply channels individualized rl Last edited by FRUGIVO; 23rd March 2013 at 09:46 AM.

1st April 2013, 04:46 PM	#569
mogliaa diyAudio Member Join Date: Dec 2009 Location: London	For those interested in simulating their designs with SPICE, I developed a slightly refined DHT composite model using my own set of curves. A model is available for PSE as well. Difference is on KP parameter which drives linearity of the model. With Dmitry's model you get a slightly worse THD response when swinging the 4P1L to its limits. 4P1L triode SPICE model \| Bartola Valves Hope this helps Ale __________________ "A mistake is always forgivable, rarely excusable and always unacceptable. " (Robert Fripp) http://www.bartola.co.uk/valves/

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19th March 2013, 10:00 AM	#561
FRUGIVO diyAudio Member Join Date: Feb 2010 Location: Burgos	really great tube for audio surprising!

23rd March 2013, 10:01 AM	#564
andyjevans diyAudio Member Join Date: Sep 2003 Location: London	Very nice work! Did you build your speakers yourself? They're really something. Andy

23rd March 2013, 12:57 PM	#567
andyjevans diyAudio Member Join Date: Sep 2003 Location: London	Brilliant!

23rd March 2013, 02:17 PM	#568
regal diyAudio Member Join Date: Jan 2004 Location: MD	I am a bit glad speakers came up, for as much info on SET amps there is very little info on this site for modest high efficiency speakers, what are people without cad assisted machines doing for speakers. Are something like econo waveguides a good route to take for and amp this small powered. I have a pair of BR Fostex 127E but they just don't have any bass, I don't know where to look for info on modest budget horn setups.

1st April 2013, 05:11 PM	#570
iko diyAudio Moderator Join Date: May 2008 Location: Toronto	Thanks Ale. As I mentioned before, if you ever find the time to trace the 26 would be great. Dmitry's model of the 26 I think is based on the datasheet, not a working sample.