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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 25

post #361 of 7468
And I shall enjoy acapella11!! smily_headphones1.gif sounds brawlick already!
post #362 of 7468
Love the review! And now finally am listening to my Jan5654W driver tubes, and in love! Thanks!
post #363 of 7468
Can anyone tell me how long it'll take for my new Jan5654W tubes to be fully burnt in? Thanks everyone! smily_headphones1.gif
post #364 of 7468
Quote:
Originally Posted by spiderking31 View Post

Can anyone tell me how long it'll take for my new Jan5654W tubes to be fully burnt in? Thanks everyone! smily_headphones1.gif

 

Give it at least 20-50 but more importantly, don't wait and enjoy it in the meantime, when it gets there it gets there.  I enjoy tubes right out of the box and love hearing the slight changes as they progress, but don't lose time waiting to get there...

 

Cheers

post #365 of 7468

Acapella 11,

 

Am using the stock Electro Harmonix 6H30Pi Gold tubes that came with my Mk IV SE. Seems like it should be the best value option around so i don't think i'm gonna roll that to the DR tubes.

post #366 of 7468

Spiderking31,

 

Great you like them and thanks. For the burn in, HeatFan12 answered that one already, only Voskhod 6J1P-EV can take up to 120 hours.

For the JAN5654Ws I did not think it took overly long. 20 to 30 hours it was, I'd say.

 

 

Categg,

 

Sorry, I did not read your sig properly (MK IV SE). The 6H30Pi Gold tubes have been reported to be an excellent choice, better than 6N6P or 6N6P-I, only haven't heard them yet. Ordered a pair of 6H30Pi-EVs, which I am still waiting for. The intention of my question was directed towards choosing between 6N6P and 6N6P-I, just to close the case. 


Edited by Acapella11 - 7/10/12 at 4:28pm
post #367 of 7468
Heatfan, I appreciate the feedback! And now I know it won't take forever! Thanks a ton!

Spiderking31:)
post #368 of 7468
Acapella, thanks for the advice though! Greatly appreciated by everyone! Thanks again,

Coury
post #369 of 7468

looking for 6zhip -ev voskhod  matched pair .....no luck so far with google .....are they still available ?

post #370 of 7468
Quote:
Originally Posted by hwy61 View Post

looking for 6zhip -ev voskhod  matched pair .....no luck so far with google .....are they still available ?

actually i found these two....6zhip - ev pair darkvoiceamp 332 332 ....and 6zhip -ev 6ak5 6j1 yaqin buffer


Edited by hwy61 - 7/14/12 at 3:11am
post #371 of 7468

hwy61,

 

what you want is called 6J1P-EV or 6Zh1P-EV or 6Sh1P-EV. It is all derived from the same Russian name. Try ebay as well and recomended are those from the 1970s. I had 1971 and 1975 and found 1975 better.


Edited by Acapella11 - 7/14/12 at 4:13pm
post #372 of 7468
Quote:
Originally Posted by Acapella11 View Post

hwy61,

 

what you want is called 6J1P-EV or 6Zh1P-EV or 6Sh1P-EV. It is all derived from the same Russian name. Try ebay as well and recomended are those from the 1970s. I had 1971 and 1975 and found 1975 better.

thanks for the response Acapella11,......it turns out when i googled the tube number, i put 6zhip instead of 6zh1p....duh!.........i ended up  buying  voshod 6zh1p ev (matched pair)  1980's......and also ended up getting the russian  6n6p gold grid (matched pair)1990's.....the date wasn't shown on the sale and by the time i inquired

the sale already went thru on ebay........i sent an e-mail to the buyer hoping to trade for the otk rhombus 5 gold grid  version 1980's.....but haven't heard back from him yet

and pay the extra cost ......haste makes waste i reckon

didn't see any from the 70's


Edited by hwy61 - 7/14/12 at 6:07pm
post #373 of 7468

update to the post above......the e-bay seller orpheus _2005 agreed to do the exchange for rhombus 5 gold grids smile.gif

i thought i knew what i needed after reading the first few pages of this thread..(that's when i did the buying)......well ... it turns out you really need to read all these post to be more informed,  with the mutitude of variations available your mind begins to bend.......

 

  big thanks to all , for the informative post

post #374 of 7468

Respective the 6N6P-I power tubes, I have done a little more comparison with 6N6P tubes (gold grid) and it comes out that treble seems more extended as well as bass is rumblier. Treble is does not sound as edgy with 6N6P-I though. On the other hand, the stage is deeper with 6N6P, reverbs are more pronounced. 6N6P-I noticeably decrease the stage depth but make the sound "rounder".

 

Technically, I found that that 6N6P-I tubes use 900 mA compared to 750 mA for 6N6P tubes. This is caused by changes of mechanical distances within the tube.

Additionally, there is 68 ohm additional resistance in the cathode circuit for 6N6P-I. (Here are the details: http://www.tubes.ru/techinfo/HiFiAudio/6n6p.html)

 

I would say say it, at least partially, sounds like the 6N6P-Is drive the AKG Q701 headphones better. Could the 6N6P-I power tubes compensate the relatively low impedance (64 ohm) of the Q701s to higher current in the output transformerless (OTL) amplification of the LD MKIII?
 

PS: Also, I found that +5 db gain gives a punchier sound than +4 db in this setup.


Edited by Acapella11 - 7/15/12 at 2:54pm
post #375 of 7468

Dear Acapella 11,

 

Did you notice that the life expectancy is six times longer for the 6N6P tube compared to the 6N6p-i (3000 vs 500 hours)?

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