6n6p or 6P14P-ev for driver

nightanole · 07:49 PM

Well after some experimenting im down to a 6n6p or 6p14p-ev (super Russian el84) with a ccs IXP10M45S running at 20ma for my driver tubes for my projects, a mono diyparadise simple el84 pp for work, and an el34 pp stereo version for home. Both have about the same gain of 20-22.

The question is which one to pick for a grounded cathode setup. What concerns me is that the bias of the 6n6p is suggested at -2v with a b+ of 120v. That only gives a 4v swing tops for the input, and some of my sources are 2vrms. On the other hand the el84 can be biased at -7v all day long. But with a gain of 20 that puts the 4vpp signal at 80v swing which should be good for anything.

tinitus · 29th August 2010, 08:30 PM

gain of 20 ? its not 20db amplification ?

Im only trying to learn

nightanole · 29th August 2010, 09:16 PM

MOD? Never heard of any piece of electronics that would boost a signal by a fixed db.

Gain of 2 would be 3db. Gain of 4 would be 6db. Gain of 20 would be 26db.

Mu=gain. Or is the mod messing with me?

tinitus · 29th August 2010, 09:51 PM

ok, thanks

piano3 · 29th August 2010, 11:31 PM

You can easily bias the 6N6P much more than -2V-it is a small power tube after all- unless you are stuck with 20mA current and 120V on the anode. Google "klausmobile" for an easy guide to operating points for both tubes. Personally, I doubt you need to run either tube as hot as 20mA and very few tubes sound best at a lowish anode voltage either. I can vouch for both of these from my own experience as being excellent and the only important consideration might be whether you want to use 2 6P14P requiring more filament current or just one 6N6P.

Wavebourn · 30th August 2010, 12:07 AM

In Pyramid-V I use 6N6P LTP driver, in Pyramid -VII I use 2x6P15P LTP driver, in Pyramid-8 I use 2x651P LTP driver. No audible differences.

Arnulf · 30th August 2010, 08:44 AM

Quote:

Originally Posted by nightanole

MOD? Never heard of any piece of electronics that would boost a signal by a fixed db.

Gain of 2 would be 3db. Gain of 4 would be 6db. Gain of 20 would be 26db.

Mu=gain. Or is the mod messing with me?

This would pertain to power gain while you're referring to voltage gain (multiply by two to get correct dB value). Common mistake, I do it every now and then too when writing something quickly in the forum

piano3 · 30th August 2010, 10:56 AM

Sorry, are you running the 6P14P as a triode or a pentode? When you mentioned a gain of 20 I assumed triode. At Va = 120V, Ia =20 mA both tubes will give a bias of a little over 2V if the pentode is triode wired. To get 7V bias with Ia =20mA from a triode wired 6P14P you need Va > 200V.

nightanole · 30th August 2010, 12:05 PM

Sorry the 20ma at 120v was the recommended operating point of the 6n6p.

Im leaning more towards the 6p14p since it looks more linear at 20ma (according to klauz) and can do the larger offset and higher voltage. I might even be able to hook up my preamp without dc blocking caps (output floats at 2.5v) since the tube would never get close to zero even with that big of a dc offset.

piano3 · 30th August 2010, 12:41 PM

So your preamp is solid state?

29th August 2010, 07:45 PM	#1
nightanole diyAudio Member Join Date: Feb 2009	6n6p or 6P14P-ev for driver Well after some experimenting im down to a 6n6p or 6p14p-ev (super Russian el84) with a ccs IXP10M45S running at 20ma for my driver tubes for my projects, a mono diyparadise simple el84 pp for work, and an el34 pp stereo version for home. Both have about the same gain of 20-22. The question is which one to pick for a grounded cathode setup. What concerns me is that the bias of the 6n6p is suggested at -2v with a b+ of 120v. That only gives a 4v swing tops for the input, and some of my sources are 2vrms. On the other hand the el84 can be biased at -7v all day long. But with a gain of 20 that puts the 4vpp signal at 80v swing which should be good for anything. Last edited by nightanole; 29th August 2010 at 07:49 PM.

30th August 2010, 12:07 AM	#6
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	In Pyramid-V I use 6N6P LTP driver, in Pyramid -VII I use 2x6P15P LTP driver, in Pyramid-8 I use 2x651P LTP driver. No audible differences. __________________ The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity!

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
RUssian 6P14P-EV / 6n23p / 6n2p-ev / 6n8s / 6n1p / etc+	UssrTradeCom	Vendor's Bazaar	0	2nd August 2010 09:39 AM
FS: 6P14P-EV \| 189A \| 6BQ5 \| EL84M \| Pentode Tube	UssrTradeCom	Swap Meet	0	16th April 2010 07:18 PM
Can this schematic work? 6N6P driver with 6C33C-B OTL	Koifarm	Tubes / Valves	13	13th April 2010 03:28 AM
CLCLC PSU for 6P14P-EV PP	leadbelly	Tubes / Valves	1	10th January 2006 10:24 PM
Looking for: EV 1823m driver	Matte	Swap Meet	1	9th September 2005 05:11 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

29th August 2010, 08:30 PM	#2
tinitus diyAudio Moderator Join Date: Nov 2005	gain of 20 ? its not 20db amplification ? Im only trying to learn

29th August 2010, 09:16 PM	#3
nightanole diyAudio Member Join Date: Feb 2009	MOD? Never heard of any piece of electronics that would boost a signal by a fixed db. Gain of 2 would be 3db. Gain of 4 would be 6db. Gain of 20 would be 26db. Mu=gain. Or is the mod messing with me?

29th August 2010, 09:51 PM	#4
tinitus diyAudio Moderator Join Date: Nov 2005	ok, thanks

29th August 2010, 11:31 PM	#5
piano3 diyAudio Member Join Date: Aug 2010 Location: London,UK	You can easily bias the 6N6P much more than -2V-it is a small power tube after all- unless you are stuck with 20mA current and 120V on the anode. Google "klausmobile" for an easy guide to operating points for both tubes. Personally, I doubt you need to run either tube as hot as 20mA and very few tubes sound best at a lowish anode voltage either. I can vouch for both of these from my own experience as being excellent and the only important consideration might be whether you want to use 2 6P14P requiring more filament current or just one 6N6P.

30th August 2010, 10:56 AM	#8
piano3 diyAudio Member Join Date: Aug 2010 Location: London,UK	Sorry, are you running the 6P14P as a triode or a pentode? When you mentioned a gain of 20 I assumed triode. At Va = 120V, Ia =20 mA both tubes will give a bias of a little over 2V if the pentode is triode wired. To get 7V bias with Ia =20mA from a triode wired 6P14P you need Va > 200V.

30th August 2010, 12:05 PM	#9
nightanole diyAudio Member Join Date: Feb 2009	Sorry the 20ma at 120v was the recommended operating point of the 6n6p. Im leaning more towards the 6p14p since it looks more linear at 20ma (according to klauz) and can do the larger offset and higher voltage. I might even be able to hook up my preamp without dc blocking caps (output floats at 2.5v) since the tube would never get close to zero even with that big of a dc offset.

30th August 2010, 12:41 PM	#10
piano3 diyAudio Member Join Date: Aug 2010 Location: London,UK	So your preamp is solid state?

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