Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Little Dot MKIII Tube Rolling
New Posts  All Forums:Forum Nav:

Little Dot MKIII Tube Rolling - Page 174

post #2596 of 2867

Hi!

 

The first step I would try is to pull out the left tube and gently scrape the pins with a little pen knife - perhaps there is some oxidation there that interferes. If that does not help, try to move around the connectors to the connecting cables a little.

I doubt that there is something wrong with the headphone driver, but if you switch around the two tubes and you still have the noise in the left channel it may not be the tube but something else.

Good luck!

post #2597 of 2867

Thanks Mordy for the help. I'll try out your suggestions when I get home and update you with the results!

post #2598 of 2867

Forgot to point out that you really have two tubes per side, so you should also check out both the driver/power tubes on the left channel.

Good luck! (I am confident that you will find the problem easily. Personally I had to scrape off oxidation on driver tubes a few times, and I had one power tube give up. Apparently, the OEM 6N6P-i power tubes are only rated for 500 hours; the 6N6P tubes are rated for 3000 hours.)

post #2599 of 2867

.


Edited by phandrew - 1/23/12 at 3:45pm
post #2600 of 2867

back after a long time!

Did you missed me after all this time?

Always.... :)

 

No update at all, i am enjoying my current setup and do not bother with checking another tubes :)

So far so good. Using headphones for music, games, and hell, movies! i watched all four Resident evil movies (my fav. series) in two days, enjoyed movie like i never did. DT 880 are hell of a dynamic headphones, i got shivers from music and explosions the whole time. And during movie, i totally forgot that i am wearing headphones. These headphones with Little dot are really a keeper. New year wishes and lot of <3 from Slovakia :)

post #2601 of 2867

just purchased some nice 5654s for very good price.

not completely sure what's included but from picture it seems like 10 GE JAN 5654

couple rca, sylvania golds and several others. looking forward to tube rolling.

Also is it really important for the tubes to be matched? some people don't really seem to care.

post #2602 of 2867

Got my MKIII a couple days (used) and it came with a couple tubes but I've decided to buy some more!

 

I used the guidance from the little dot tube rolling thread and bought: GEJAN 5654W, Voshkod 6ZH1P-EV, and Mullard 6AK5 M8100. Pretty excited for them to get here!

   

I see what people were saying when they said that tube rolling can be expensive :P.

post #2603 of 2867

Hey Guys! Need some help... Ever since I purchased my ESW9's I decided to get my "dusty" MKIII out once again and I noticed that the driver tubes "6H30PI" (mod) are having some problems. One channel is considerably louder than the other (right), so I switched the power tubes out and now the left side is much louder. Before dropping 50 bucks on new power tubes, I would like to know if the chances are that the problem is from the amplifier itself or more likely mismatched power tubes, or faulty ones. I am leaning toward the tubes being at fault but I am not sure... Thanks in advance guys! biggrin.gif

post #2604 of 2867

It stands to reason that if the louder power tube switches to the other side when you switch the tubes, the problem is in the power tube.

You may want to consider cheaper 6N6P gold grid power tubes that I have good experiences with. There are many sellers on EBay - the cheapest one today for two tubes is here: (Try to get 60's-70's tubes if you can; they are supposedly better than later ones.)

 

 

 

 

http://www.ebay.com/itm/6N6P-ECC99-E182CC-Tubes-NOS-GOLD-grid-1979-1pc-more-/320836005970?pt=Vintage_Electronics_R2&hash=item4ab350f052

post #2605 of 2867

Just joined the MKIII club.  I can't wait to get some Voshkod & Mullard tubes!

post #2606 of 2867
Quote:
Originally Posted by mordy View Post

It stands to reason that if the louder power tube switches to the other side when you switch the tubes, the problem is in the power tube.

You may want to consider cheaper 6N6P gold grid power tubes that I have good experiences with. There are many sellers on EBay - the cheapest one today for two tubes is here: (Try to get 60's-70's tubes if you can; they are supposedly better than later ones.)

 

 

 

 

http://www.ebay.com/itm/6N6P-ECC99-E182CC-Tubes-NOS-GOLD-grid-1979-1pc-more-/320836005970?pt=Vintage_Electronics_R2&hash=item4ab350f052


Hey Mordy,

 

Thanks for the help and the link! very good price on those tubes. I am really looking forward to get the amp working perfectly as before, since I really missed that tube "flavor" in my music... Though I think I am going to settle for the EH 6H30pi power tubes, I think this would go very will with the M8161's... Also Soze welcome to the proud MKIII club and enjoy the sound! Cheers,

 

post #2607 of 2867

Hello,

 

the 6H30pi will be a great pair with the Mullards! For a little bit more detail and crisper highs, try the Voskhod ones. They're named variousliy, look out for the gold grid ones.


For example, these: http://www.ebay.de/itm/130635182925?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

 

 

Greets,

 

Nik

 

 

EDIT:   Does anyone know this kind of tube? Maybe how they sound?    http://www.ebay.de/itm/Tube-SEL-EF92-sehr-gut-/260949656146?pt=R%C3%B6hren&hash=item3cc1cfc252


Edited by infinity650 - 2/7/12 at 5:20pm
post #2608 of 2867

The russian 6jip-ev is an interesting sounding tube, it really stands out of the rest of the ef95 family. Not that it is better than others tubes but the sound signature is vastly different (relatively). It is more forward sounding and loud and I suspect it's because it puts more accent on the midrange and treble. At first I didn't like its harsh presentation but now after many hours of use I take pleasure in listening to them. They are still loud and agressive but don't sound digital and lifeless like my ss amp. Interesting tube!

post #2609 of 2867

Hello,

 

I absolutely agree with your opinion about the Voskhod's.

 

These days a pair of Mullard CV 4014 EF91 arrived. It's in the burn in phase but aloready sounding nice, warm, relaxed and animate for some toe tapping. I will report after burn in and longer comparison with my other tubes. But definetly no bad buy for about 18€ including shipping.

 

Greets,

 

Nik


Edited by infinity650 - 2/9/12 at 8:35am
post #2610 of 2867

Hi,

 

Just want to point out that the Voskhods need a VERY long burn in period to sound their best - around 120 hours.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Little Dot MKIII Tube Rolling