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Little Dot I+ Tube Rolling
Mar 15, 2009 at 4:41 PM Post #316 of 3,154
For those of you who like heavy bass, The Amperex 6AK5W are extremely bass heavy.
If you cant find any, I have extra Amperex 6AK5W tubes I will put up for sale in the "for sale" section.
Bass snobs need not inquire.
 
Mar 19, 2009 at 1:53 AM Post #317 of 3,154
Quote:

Originally Posted by lisztian420 /img/forum/go_quote.gif
Alrite,.. so I got my LT1364! Installed it,.. and.... the improvement of SQ is very noticeable. Then,.. I rolled in my new WE408A and I am really liking the sound! I am soo happy that I got the LT1364! Good upgrade for $10! I think the WE408A are also significantly better than the original tubes. Anyways,.. I am happy! For those who got the LD I+ go and get the LT1364 and a nice pair of matched tubes now
smily_headphones1.gif



How hard is it to replace the op amp?
 
Mar 19, 2009 at 2:03 AM Post #318 of 3,154
1. unplug power, let sit for 10 minutes, remove tubes.
2. remove bottom 2 screws on face and back plates
3. flip over and lift off bottom plate
4. locate opamp noting orientation of lettering
5. remove with fingers or gently with pliers
6. pop in replacement op amp in same orientation as stock op amp
7. replace bottom plate and tubes
8. enjoy.
 
Mar 21, 2009 at 6:18 PM Post #320 of 3,154
I got my samples of OPA2107 opamps a few days ago.
Considerably more bass and less bright than LT1364.
The highs are a little tamed, listening for a long time is now much easier on the ears.
Mids are more pronounced and voices prevail more over the band/orchestra.

The OPA2107 doesnt sacrifice any details...its just more laid back.
If you are (like me) are into rock, metal and R&B you should try OPA2107 in your LD1+.
It Rocks...

It is a great experience rolling tubes and opamps with this amps.
Until now i only had very noticable effects swapping those parts.
I like my LD1+ so much...
 
Apr 14, 2009 at 1:43 PM Post #324 of 3,154
Quote:

Originally Posted by Robot /img/forum/go_quote.gif
Is there anyone who used Tung Sol 408A's? Are they really worth the price?


Yes, well worth the cost....of course I only paid $3 a tube off eBay...I guess it depends what your price is. I really haven't put enough hours on them to comment on their SQ
 
Apr 14, 2009 at 10:39 PM Post #325 of 3,154
I found my opamp for the LD1+...

Its the single opamp OPA211 from Texas Instruments mounted on a single-to-dual adapter from Brown Dog.

It has got the sound i like.
Everything is more balanced and has a better soundstage than with all the other opamps i have tried. No sibilance at all. I hate sibilance.

I swapped all my opamps "blind" and listened to 3 albums each to get an impression.
This might be not very scientific but the OPA211 clearly won this contest.

I have tried so far:

Dual Opamps
-LT1364CN8#PBF (DIP-8, Bipolar)
-OPA2107AP (DIP-8, DiFET)
-LME49860NA (DIP-8, Bipolar)

Single Opamps (with single to dual adapter)
-2x OPA827AID (SO-8, JFET)
-2x OPA211ID (SO-8, Bipolar)
-2x LT1028ACN8 (DIP-8, Bipolar)

Niiiiceee!

P.s.: I am trying to hunt down some AD797BRZ but no luck so far (mostly too expensive...)
If anyone has got two AD797BRZ for sale, PM me please.
 
Apr 15, 2009 at 5:17 PM Post #326 of 3,154
Grmpf!

I just burned two resistors inside of my LD1+ while tuberolling.
I forgot to switch from 408a to EF92.

Could someone take a look inside his amp and send me the color code of the two resistors in line and next to the two dip-switches?

A close-up photo would be excellent.

Please!
 
Apr 15, 2009 at 5:42 PM Post #328 of 3,154
Thank you very much, brother... :wink:
 
Apr 15, 2009 at 6:41 PM Post #330 of 3,154
another brother.
Thanks.

Im going to buy 10 pieces or so if this should happen again.
And im going to solder in the resitors a little bit elevated to prevent them burning the PCB, just in case...
 
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