4E27 Triode connection SPICE model

ja2dhc · 5th June 2009, 02:57 PM

I have made a spice model of 4E27 triode connection. The file of
the models for SPICE, SIMetrix and TINA has been uploaded into
my Web as below.

http://ja1cty.servehttp.com/4E27/spice.zip

The file is a ZIPed file including three files for spice, SIMetrix and TINA.
The attached photo is a Ip curve of 4E27 triode connection. It shows
very good linearity and low impedance like 845.

dowdylama · 5th June 2009, 06:00 PM

Have you built anything with the triode-wired 4E27?
If so, how did it sound?

Jim

ja2dhc · 6th June 2009, 12:06 AM

Quote:

Originally posted by dowdylama
Have you built anything with the triode-wired 4E27?
If so, how did it sound?
Jim

I've not yet built an amp using 4E27 triode wired. But I did a simulation
using the spice model which I uploaded into my Web.

The simulation schematic is shown in the attached photo. As you can
see, it is SET NO-NFB construction. Operating conditions are as follows:

Ep=700V
Ip=100mA
Vg=-110V
Rl=5Kohm

As a result. THD=2%@20W is obtained. It is remarkably low distortion
within NO-NFB SET amps.

dshortt9 · 6th June 2009, 12:30 AM

I have a few of these and hope to build soon. I was thinking more of the two stage 845 amp using a 6HV5 / 6JD5 at 900 to 1000 volts. There is so much gain to kill in the front end I thought a bit of local feedback would reduce the output impedance of that stage to better drive the 4E27A. 0.7v sensitivity without feedback and lots of swing. There is a thread about this.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Another 3f4 spice triode model: 5718 submini triode	wa2ise	Tubes / Valves	0	5th September 2008 04:31 AM
6AN8 Triode connection + EL 84 PP	Tobruk	Tubes / Valves	3	2nd May 2007 02:42 AM
WTH -- UL back to triode connection	zigzagflux	Tubes / Valves	3	6th February 2007 02:59 AM
6V6PP -> 6L6 PP with triode connection.	zxx123	Tubes / Valves	4	7th February 2005 06:25 PM
transformers, regulation, triode-connection...	metebalci	Tubes / Valves	11	20th February 2004 12:01 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

5th June 2009, 06:00 PM	#2
dowdylama diyAudio Member Join Date: Mar 2005 Location: western North Carolina	Have you built anything with the triode-wired 4E27? If so, how did it sound? Jim

6th June 2009, 12:30 AM	#4
dshortt9 diyAudio Member Join Date: Apr 2001 Location: Milwaukee, Wisconsin	I have a few of these and hope to build soon. I was thinking more of the two stage 845 amp using a 6HV5 / 6JD5 at 900 to 1000 volts. There is so much gain to kill in the front end I thought a bit of local feedback would reduce the output impedance of that stage to better drive the 4E27A. 0.7v sensitivity without feedback and lots of swing. There is a thread about this.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)