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Dark Voice 339 - Page 100

post #1486 of 2242
Quote:
Originally Posted by kramer5150 View Post

Yes... but I push a pair of output transformers with mine, and use that to drive my low-Z Grados and K701.  Thats (IMHO) a better solution (far better with the Grados), being that it presents the tubes with an optimal high impedance load.  DV (for whatever reason) under-spec'd capacitance of the earlier 337 models.  It was something they recognized and addressed with re-released designs.

 

Threads of interest for those into DIY...

http://www.head-fi.org/t/652270/output-coupling-cap-and-transformer-mod

 

Theres some excellent OT discussions in this thread here, and some detailed FR and THD analysis by Elliottstudio in the latter posts:

http://www.head-fi.org/t/629661/a-lo-cost-ht-supply-true-transformer-coupled-tube-headphone-amplifier

 

 

 

 

 

 

 

very smart and cool solution, good work!

post #1487 of 2242

Hey Wall-E!

 

I got the parts and I made the adapter, only problem is i got no sound!

I don't understand my problem I checked the filmaments, all the other pins seems correct...

I cut the pins 4 5 and 8 so they don't come in contact with the base. All is wired like yours, and I too have pin 7 hot and pin 2 grounded...

Still scratching my head!

No damage to the amp so far, thanks gosh.

Quote:
Originally Posted by WALL-E View Post

 

 

The machined teflon connex is a perfect match with the base but in black could be even nicer.

I reduced the internal connection to total min, actually all the 7 wires coming from the 8 pin socket are only to extend the pins to make the proper joints with the bakelite tube base and at the same time making it very steady, don't need any glue!

 

And one thing u have to check in your amplifier, as u know the filaments are 7 & 2 I change the circuits in my amp pin 2 goes to the ground and 7 is hot.

If u have opposite, change on adapter (make bridge 1,8,7) then pin 2 will be hot.

post #1488 of 2242

Does the 339 work well with most all of headphones out there. Mid-Fi and up?

post #1489 of 2242
Quote:
Originally Posted by telecaster View Post

Hey Wall-E!

 

I got the parts and I made the adapter, only problem is i got no sound!

I don't understand my problem I checked the filmaments, all the other pins seems correct...

I cut the pins 4 5 and 8 so they don't come in contact with the base. All is wired like yours, and I too have pin 7 hot and pin 2 grounded...

Still scratching my head!

No damage to the amp so far, thanks gosh.

It should work, I'll check it out when I get home from work.

post #1490 of 2242

Does anybody know if its possible to exchange the 2 rca inputs into 2 slr inputs on the 337/339? It still stays unbalanced..only the connectors...as i wanna buy a dac with slr outputs..a balanced dac. I dont wanna buy a slr to rca converter..

Thanks!


Edited by hifimanrookie - 3/5/13 at 1:11am
post #1491 of 2242

what balanced DAC are you getting? most of them I have had all head RCA outs as well as balanced outs

post #1492 of 2242
Quote:
Originally Posted by Ultrainferno View Post

what balanced DAC are you getting? most of them I have had all head RCA outs as well as balanced outs

Nad m51..as i understand the m51 sounds best when connected through its balanced connections..thats why i asked..wink.gif

post #1493 of 2242
Quote:
Originally Posted by hifimanrookie View Post

Nad m51..as i understand the m51 sounds best when connected through its balanced connections..thats why i asked..wink.gif

There's no logic at all in that...

Sorry. But please explain how your thoughts were because I simply can't understand the resoning.

 

If you take the balanced signal and make it unbalanced.. In other words, use one of the outputs + ground. You have created a single-ended signal. In other words, the same thing as the RCA.

post #1494 of 2242

The 339 is balanced?

post #1495 of 2242
Quote:
Originally Posted by ValentinHogea View Post

There's no logic at all in that...

Sorry. But please explain how your thoughts were because I simply can't understand the resoning.

 

If you take the balanced signal and make it unbalanced.. In other words, use one of the outputs + ground. You have created a single-ended signal. In other words, the same thing as the RCA.

Mmmm..i just thought the signal through the balanced circuit of the m51 would provide better sq then the unbalanved one and so provide better signal to the 337 ( lie the yulong sabre..its unbalanced..but has slr connections....but i see thats not needed..okay..i see it has no point trying that..oh well..then it will be rca to rca then..wink.gif


Edited by hifimanrookie - 3/5/13 at 8:22am
post #1496 of 2242
Quote:
Originally Posted by WALL-E View Post

It should work, I'll check it out when I get home from work.

Thanks,

I triple checked my soldering job on the adapter and they are exactly like yours.

 

Just I wasn't 100% sure because I couldn't see all the wires left and the pins cut, but as you add commentaries, I followed and snap the 4 5 and 8th pins.

 

Maybe I should check my amp. I know that I have my grid resistor going from pin1 to pin5... I would really appreciate a little photo of your DK339 driver socket ^^

Sorry to bother you, but if you have the spare time to open you amp it would be great!


Edited by telecaster - 3/5/13 at 10:02am
post #1497 of 2242
Quote:
Originally Posted by telecaster View Post

Thanks,

I triple checked my soldering job on the adapter and they are exactly like yours.

 

Just I wasn't 100% sure because I couldn't see all the wires left and the pins cut, but as you add commentaries, I followed and snap the 4 5 and 8th pins.

 

Maybe I should check my amp. I know that I have my grid resistor going from pin1 to pin5... I would really appreciate a little photo of your DK339 driver socket ^^

Sorry to bother you, but if you have the spare time to open you amp it would be great!


PM sent.

post #1498 of 2242

hi guys , I took delivery of the 339.. it was suppose to come in Wednesday but it came Monday night..I'll take pics later..

I'm not much of an audiophile with golden ears, and even lesser of a reviewer..I just look for ways to enjoy music more.

all I can say is I'm very impressed and this has it all over my bottlehead crack speedball as far as looks/build are concerned. 

 

I listened for some time using stock tubes with the hd650, through a havana dac and could tell the amp had a lot of potential.

Then next day I swapped tubes to some NOS Chatham 2399 and RCA red 5693 input tubes.  Things got much better.

 

The next day I swapped out the hd650, for my the hifiman he500 , oh man oh man jeez louise, that is the ticket I kept asking myself what

more can you ask for than this.  Then I thought this amp hasn't even broken in yet also I I'm listening to 320kbs streaming on spotify 

havent even listen to FLAC files yet..

 

LIke I said Im no writer so let me summarize like this, this amp has kept me till 2am, the straight 3 nights.  

I find myself listening to entire songs , I'm not listening to "snippets"  I love this F'n thing!!    

 

The only thing I want to change is the metal input tube, I rather have glass.  anyone know a source  for the Tung Sol mesh plate input tubes?

post #1499 of 2242
Quote:
Originally Posted by eantala View Post

hi guys , I took delivery of the 339.. it was suppose to come in Wednesday but it came Monday night..I'll take pics later..

I'm not much of an audiophile with golden ears, and even lesser of a reviewer..I just look for ways to enjoy music more.

all I can say is I'm very impressed and this has it all over my bottlehead crack speedball as far as looks/build are concerned. 

 

I listened for some time using stock tubes with the hd650, through a havana dac and could tell the amp had a lot of potential.

Then next day I swapped tubes to some NOS Chatham 2399 and RCA red 5693 input tubes.  Things got much better.

 

The next day I swapped out the hd650, for my the hifiman he500 , oh man oh man jeez louise, that is the ticket I kept asking myself what

more can you ask for than this.  Then I thought this amp hasn't even broken in yet also I I'm listening to 320kbs streaming on spotify 

havent even listen to FLAC files yet..

 

LIke I said Im no writer so let me summarize like this, this amp has kept me till 2am, the straight 3 nights.  

I find myself listening to entire songs , I'm not listening to "snippets"  I love this F'n thing!!    

 

The only thing I want to change is the metal input tube, I rather have glass.  anyone know a source  for the Tung Sol mesh plate input tubes?

The HE-500 with that pairing will make you wonder if you even really need the HD650 after a while... unless of course, you have comfort issues with the HE-500.  

post #1500 of 2242
Quote:
Originally Posted by eantala View Post

hi guys , I took delivery of the 339.. it was suppose to come in Wednesday but it came Monday night..I'll take pics later..

I'm not much of an audiophile with golden ears, and even lesser of a reviewer..I just look for ways to enjoy music more.

all I can say is I'm very impressed and this has it all over my bottlehead crack speedball as far as looks/build are concerned. 

 

I listened for some time using stock tubes with the hd650, through a havana dac and could tell the amp had a lot of potential.

Then next day I swapped tubes to some NOS Chatham 2399 and RCA red 5693 input tubes.  Things got much better.

 

The next day I swapped out the hd650, for my the hifiman he500 , oh man oh man jeez louise, that is the ticket I kept asking myself what

more can you ask for than this.  Then I thought this amp hasn't even broken in yet also I I'm listening to 320kbs streaming on spotify 

havent even listen to FLAC files yet..

 

LIke I said Im no writer so let me summarize like this, this amp has kept me till 2am, the straight 3 nights.  

I find myself listening to entire songs , I'm not listening to "snippets"  I love this F'n thing!!    

 

The only thing I want to change is the metal input tube, I rather have glass.  anyone know a source  for the Tung Sol mesh plate input tubes?

Those tung sols are hard to find..am lucky i have a pair..andwith the 5998's they are heaven in music..am now looking for a dac to pair it with..i heard the blue circle 509 dac goes perfect with a tube amp..

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