russian penthodes 6J2P-EB and 6J9P. - 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 26th February 2012, 11:31 AM   #1
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
Default russian penthodes 6J2P-EB and 6J9P.

Hi here

I have this tubes from ebay, the 6J2P-EB is small little tube, I need a new socket, someone now what type?

The 6J9P is microfonic, if I tap it pinggggg in the speaker, I have it as triode strapped in a hybride amp as voltage amp, I have discover that the tube sounds very nice, special with a plate resistor, a ccs or other mosfet use is not so good sounding, a lot of hissssss in the voices of singers.

The small little 6J2P-EB is a lot better made, no zingg.

I ask myself how it sounds as I use not triode but penthode strapped, is there somewhere a calculation program for penthodes?

thanks
  Reply With Quote
Old 26th February 2012, 12:46 PM   #2
diyAudio Member
 
the_manta's Avatar
 
Join Date: Nov 2006
Location: Munich, Bavaria
6Ж2П has the standard widely used miniature 7-pin (Pico-7, B7G) socket. Nothing uncommon.
But, this is a remote cutoff valve. Probably it belongs to some AGC circuit for RF. Expect some serious distortion when it is operated in the "knee" of the curve.

And 6Ж9П = E180F

I don't know what you mean by calculation programm. When you got the curves and parameters of your tube you can start playing around and designing your circuit.
Attached Images
File Type: gif 6j2p.gif (93.3 KB, 419 views)
File Type: gif 6J9P.gif (66.6 KB, 393 views)
__________________
Терпенье и труд все перетрут
  Reply With Quote
Old 26th February 2012, 02:17 PM   #3
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
I have ordered here.

6J2P-EV Russian Tubes Pentod Equ. 6AS6, 5725 Lot of 40 | eBay

is for voltage amplification, but if I do them CCS loaded touching the knee is easely prevented if i have right, with high idle current.

I am not so experienced with tube data en tubes himselfs, I have design a hybrid who is playing some years now and I experienting with it, so try different tubes.

thanks for your info.
  Reply With Quote
Old 26th February 2012, 09:38 PM   #4
piano3 is offline piano3  United Kingdom
diyAudio Member
 
Join Date: Aug 2010
Location: London,UK
I have used 6j9p-e many times; yes, if you tap it you will get a silvery ring but why do you need to tap it? I have not had any problems in normal use including 2nd stage of a MM phono. A chassis which does not ring should help. It is an excellent tube and still cheap and plentiful.
  Reply With Quote
Old 27th February 2012, 10:32 AM   #5
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
Quote:
Originally Posted by piano3 View Post
I have used 6j9p-e many times; yes, if you tap it you will get a silvery ring but why do you need to tap it? I have not had any problems in normal use including 2nd stage of a MM phono. A chassis which does not ring should help. It is an excellent tube and still cheap and plentiful.
I don,t need to tap it, but I did presume that if it do ringing then she are bad, as I now here from you that is not the case.

I have them in my amp, it sounds very good in triode mode, I don,t now yet how it sounds as a penthode, what I do now, a plate resistor works best for them, a ccs or gyrator on plate let them give the ssss sound in voices.

I have ordered the 6j51p also as test, and the 6H8C for cascode, but these are quite expensive in some cases, the 6sn7 is be produced again and cheaper then, so I stick to that.
  Reply With Quote
Old 27th February 2012, 11:33 AM   #6
diyAudio Member
 
Blaireau's Avatar
 
Join Date: May 2011
Location: Dijon
http://frank.pocnet.net/sheets/112/6/6Z2PEV.pdf 6J2P or 6J2P-EV have a transconductance of 4.15 ma/V. But, they are not remote cutoff tubes.
__________________
http://constructions.f6fkn.com
  Reply With Quote
Old 27th February 2012, 12:12 PM   #7
diyAudio Member
 
the_manta's Avatar
 
Join Date: Nov 2006
Location: Munich, Bavaria
Quote:
Originally Posted by Blaireau View Post
http://frank.pocnet.net/sheets/112/6/6Z2PEV.pdf 6J2P or 6J2P-EV have a transconductance of 4.15 ma/V. But, they are not remote cutoff tubes.
Indeed ! You are right, I misinterpreted that. It was used in dual control amplifiers
But the curves look strange just like the Early-effect in BJTs. Would love to see blueprints of its internal structure

Furthermore the lovely made CSF datasheet (http://frank.pocnet.net/sheets/181/5/5725.pdf) of the wester equivalent type says it used as variable gain amplifier (amplificateur à gain réglable)

But with enough current you should be well in the linear region.
__________________
Терпенье и труд все перетрут
  Reply With Quote
Old 27th February 2012, 12:28 PM   #8
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
6AS6 is a Western equivalent. It has a modified suppressor grid, but otherwise is very similar to 6AK5/EF95.
  Reply With Quote
Old 27th February 2012, 12:36 PM   #9
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
Well I will try them in the hybrid amp. post the sound (youtube) here if ready.

the best I have heard was still the 6H8C self bias cascode, very full and free,
only if the next stage has very high impedance, to let 6H8C swing free..

Now I have put in (just did) the EF184 this sounds also very good (triode mode).

try it in penthode mode, plate resitor is 15 kohm, current 10 mA

6J2 grid 3 tyed on cathode, like al the others because this was the control grid,
if I am right, we don,t use it on audio.

Last edited by kees52; 27th February 2012 at 12:40 PM.
  Reply With Quote
Old 27th February 2012, 12:54 PM   #10
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
Oeii I found also two EF804 silver plate telefunkes here, new in box, this are high quality tubes for professional audio.
  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
NOS Capacitors(russian, phillips), Russian tubes, SS amp kits, power TX rvrazvan Vendor's Bazaar 0 26th May 2011 04:32 PM
6j9p dsavitsk Tubes / Valves 4 2nd November 2007 07:34 PM
EB-TA0103A integrated amp. Fin Class D 2 13th February 2007 03:57 AM
FS: 4 Russian 6n15n-EB tubes nodiak Swap Meet 0 23rd June 2006 02:44 PM
Eb-ta2020 opentop Class D 16 30th May 2005 07:42 AM


New To Site? Need Help?

All times are GMT. The time now is 09:06 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