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Little Dot I+ Tube Rolling - Page 122

post #1816 of 2985
Quote:
Originally Posted by gibosi View Post
 

 

As you face the amp, left is left and right is right. If you swap tubes, does the scratchiness move to the right ear? Does this happen with other tubes, as well? 

I only notice it with the Mullard's. Once I past 30 minutes the scratchiness starts to get louder and louder. I even have 3 sets of 8083's. Same thing. The left tube or pot makes these sounds.Maybe it is that family and the voltage being a problem.

post #1817 of 2985
Quote:
Originally Posted by henree View Post
 

I only notice it with the Mullard's. Once I past 30 minutes the scratchiness starts to get louder and louder. I even have 3 sets of 8083's. Same thing. The left tube or pot makes these sounds.Maybe it is that family and the voltage being a problem.

 

This is a new one on me. The only time I hear a "scratchy" sound is when the cathode (pin 2) has a poor connection. But if so, you should hear this on all your tubes. 

 

The 8083 is an EF91 tube.... The only thing I can think of is that perhaps the left EF91/92 jumper is a bit loose. But that is a long shot as that jumper ties pins 5, 6 and 7 together..... Otherwise, I don't have no idea.... sorry....

post #1818 of 2985
Quote:
Originally Posted by gibosi View Post
 

 

This is a new one on me. The only time I hear a "scratchy" sound is when the cathode (pin 2) has a poor connection. But if so, you should hear this on all your tubes. 

 

The 8083 is an EF91 tube.... The only thing I can think of is that perhaps the left EF91/92 jumper is a bit loose. But that is a long shot as that jumper ties pins 5, 6 and 7 together..... Otherwise, I don't have no idea.... sorry....

Thanks,

 

I think I will purchase another brand in the ef91 family. To see if I notice the same thing. Doubt it though. I did however get the 4562 back working by applying an adaptor. It is very harsh in the treble region. But good vocal detail and decent bass.

I really want to try that MUSE you mentioned. But the price is so high. Maybe when I get my income taxes done. LOL

post #1819 of 2985
Quote:
Originally Posted by henree View Post
 

I think I will purchase another brand in the ef91 family. To see if I notice the same thing. Doubt it though.done.

 

Before I got double triode fever, this was the best EF91 I heard:

 

http://www.ebay.com/itm/EF91-CV4014-KB-Z-GEC-NOS-MATCHED-PAIR-/310114507805?pt=UK_Sound_Vision_Valves_Vacuum_Tubes&hash=item483443dc1d

 

But that money, you could get a MUSES 02. lol :)

post #1820 of 2985


The Voshkods are in! Immediately better than the basic EF92 tubes. Gonna listen for a while, then play with opamps.
post #1821 of 2985
Quote:
Originally Posted by hsubox View Post



The Voshkods are in! Immediately better than the basic EF92 tubes. Gonna listen for a while, then play with opamps.

 

Quote:
Originally Posted by hsubox View Post



The Voshkods are in! Immediately better than the basic EF92 tubes. Gonna listen for a while, then play with opamps.

I like them alot. They have great energy and detail. Very 3 dimensional sound.

post #1822 of 2985
Quote:
Originally Posted by henree View Post
 

I only notice it with the Mullard's. Once I past 30 minutes the scratchiness starts to get louder and louder. I even have 3 sets of 8083's. Same thing. The left tube or pot makes these sounds.Maybe it is that family and the voltage being a problem.

Just to update you guys. I have yet to find a solution to the left ear static problem with my amp. It wasn't the tubes something in the circuit has gone bad. So I am giving up on this amp. Too bad because the 8083 tubes coupled with the 4562 op-amp was heaven to me. David hasn't responded to my emails either. Time to move on.

post #1823 of 2985
Quote:
Originally Posted by henree View Post
 

Just to update you guys. I have yet to find a solution to the left ear static problem with my amp. It wasn't the tubes something in the circuit has gone bad. So I am giving up on this amp. Too bad because the 8083 tubes coupled with the 4562 op-amp was heaven to me. David hasn't responded to my emails either. Time to move on.


Funny you should say that about David as there is a new post in (I think) the headphone forum praising their great customer service. I have noticed that about LD in reading various posts, some people seem to get exceptional service and others basically no service at all.

post #1824 of 2985

"6HM5 (GE, EI and Sylvania - avoid the short squat tubes - get the taller tubes"

 

Could someone please explain me WHY to avoid the small tubes?. (damage/sound/etc)

 

Thanks

post #1825 of 2985
Quote:
Originally Posted by McMdk View Post
 

"6HM5 (GE, EI and Sylvania - avoid the short squat tubes - get the taller tubes"

 

Could someone please explain me WHY to avoid the small tubes?. (damage/sound/etc)

 

Thanks

 

Sound. I found the tall tubes sounded better than the short tubes.

post #1826 of 2985

Just a few impressions for some Novosibirsk 6J3P-Es I've been giving head time:

 

Treble: Very smooth. Not aggressive but still lots of quality.

Mids: Liquid. Nice and thick but still very clean.

Bass: Full and round. Good texture. Not super deep but still extends well.

 

Soundstage: Better than Voskhod

Separation: Excellent. Everything is easily pinpointed.

 

These tubes have given the Voskhods a run for their money. My pair at least, is quieter than the Voskhod. The Novos aren't as aggressive as the Vosks, but they are extremely quiet and still have plenty in common with their Russian cousin.

 

For anyone looking to try em, I highly recommend.

 

PS. For anyone looking to try some Tung Sols or Mullard 8083s, I'm putting mine up FS soon. If you PM me referencing this post, I'll cut you a deal!


Edited by JoeDoe - 3/16/14 at 6:14pm
post #1827 of 2985

Just received a pair of Voshkod 6ZH1P-EV, straight from the box they sound much better then the 6JI stock tubes.

post #1828 of 2985

You should try 6HM5.

post #1829 of 2985
Hello everyone. I'm sorry to disrupt the flow but I have a mission and I've been sent in this direction.

I'm currently using a Fiio E18 to drive my AKG Q701's. While I have no problems getting things loud there's an inherent edginess to the sound of the AKG's treble & upper mids regions.

I'd like to dial this out but I don't want to use EQ to do it. I've always fancied using valve gear and the idea of tube rolling excites me. I'm not rich so I'm thinking this is possibly the place for me.

What do you guys think? If you suggest I go for it I'll get right back to the start of this thread and begin the work.

Thanks for listening.
post #1830 of 2985

You have it exactly right. Tubes allow you to tailor the sound. Welcome to tube land! :)

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