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Dark Voice 339 - Page 93

post #1381 of 2241

Hey Wall-E,

I'm finer than ever, but life's can get can so busy you know what I mean.. Lack of time to be around but still a great crowd and a great amp!

 

Still enjoying this very fine heavy amp with its mod its going strong! Now with what is inside, only a nuclear bomb can make it stop working and even then I also doubt it would stop it!

 

Thanks for you adapter, I kind of missed the TS sweet sound and as they were sleeping quietly they looked kind of sad!

 

Thanks for the list, I ordered the item but I went a little adventurous and took black cmc octal socket, I could still shave them if they don't fit like yours. Your teflon's looks like a perfect fit though.

 

PS: I call this mod the yellow blue 339 mod

_DSC2431.jpg

 

_DSC2445.jpg

 

_DSC2419.jpg

 

 

.The french 339 mod was with SCR film caps but with french glass wound rez.

 

Cheers and rock on!

 

c


Edited by telecaster - 2/14/13 at 4:45pm
post #1382 of 2241

double post


Edited by telecaster - 2/14/13 at 9:54pm
post #1383 of 2241

Mr. Caster, that looks wonderful. What size caps did you use? Heck, I'd appreciate any details on this mod you'd wish to share.

 

KP
 

post #1384 of 2241
Quote:
Originally Posted by snip3r77 View Post

Can anyone help to summarize what are the tubes that can be rolled? 91 pages is too crazily long.

Thanks guys

I can only talk bout my 337 and i really love the combo tung sols 5998 (power) with tung sols sj7gt mesh plates (drivers)..alternative could be..bendix 6080 wb with graphite plates (power) with rca 5693 reds (drivers)..

ultrainferno would advice chatham tubes also..right ultrainferno?biggrin.gif

post #1385 of 2241
Quote:
Originally Posted by snip3r77 View Post

Any idea what is this 339 reference that are talking about. Seems like a parts upgrade or something.

The LF339 stock version modded by Boss itself and it is not a just parts upgrade this is much more.

 

http://www.diybuy.net/thread-416700-1-1.html

 

Quote:
Originally Posted by BackwardPawn View Post

The surgery on my 339 went well.  It was indeed the wire wound resistors creating the crackle.  The new Vashay resistors work well and sound better than the old ones--even with the stock input tubes still on.  Now all I have to do is decide whether to fix the broken adapter and use the EF80s or buy a set of octal tubes to go into the input sockets.

 

How would I go about fixing the adapter?  Should I assume the base was done correctly, desolder all the old connections, use a DMM to copy the working one and attach it to a new 9 pin socket? While its doable, I'm thinking I'm best off finding an octal match for my 6AS7G tubes (at least until my soldering skills are better).  I know its supposed to be good match, but I know just enough to be dangerous at this point. ;)

Good to hear that your amp back to life after small surgery. Actually I'm not surprised, the weakest point of this amp are wire wound resistors and using the Vashay instead of stock resistors can only get better.            

Having one working adapter use the DM checking one by one to localize the glitch.

 

Quote:
Originally Posted by telecaster View Post

Hey Wall-E,

I'm finer than ever, but life's can get can so busy you know what I mean.. Lack of time to be around but still a great crowd and a great amp!

 

Still enjoying this very fine heavy amp with its mod its going strong! Now with what is inside, only a nuclear bomb can make it stop working and even then I also doubt it would stop it!

 

Well said! have the same feelings as you.

Burn-In/Break-In also capacitors forming especially for el was the most important element affecting on how it's sound from first minute to current state.

 

PS adapter "schematic" updated to the post #1380.

post #1386 of 2241

I actually did figure out the issue with the adapter, but haven't figured out the best way to fix it yet.  I used a DMM to compare pin continuity and it looks like two pins were reversed.  It shouldn't be hard to just solder pins from the base to a new top, the problem is I'm not sure what those solder bridges they put on the adapters are for.  My best guess is they ground the circuit in some way.

 

Fixing the adapter is on my list of things to do, but I think I'm going to do; but I'm going to probably going to just order a $20 pair of tubes from tube center while I figure out how to fix it.  Maybe Yuking has a schematic of the adapters he could send.

post #1387 of 2241
For upgrading the capacitors,here its all detailed http://www.head-fi.org/t/611348/help-needed-to-upgrade-the-capacitor-in-otl-tube-amp
Edited by telecaster - 2/18/13 at 10:06am
post #1388 of 2241
Thank you wall-E I'll be vigilante about the filament Supply. You made a pretty clever adapter and I can't wait to try it out at on my amp, I concur Modding the output coupling caps is the most impactfull of all mods, but you can tune the sound further with different voltage biasing too.

I'm waiting for a new USB DAC from meridian and it looks pretty promising With the amp. I'll report on that later.
post #1389 of 2241
Quote:


Thank you, green sir.

 

KP

post #1390 of 2241
Anyone uses the 337 here that can comment if there's a SIGNIFICANT difference with the 339?

Cheers.
post #1391 of 2241
Quote:
Originally Posted by snip3r77 View Post

Anyone uses the 337 here that can comment if there's a SIGNIFICANT difference with the 339?

Cheers.

 

No, we don't like 337 owners.

Just kidding

Maybe

rolleyes.gif

post #1392 of 2241
Quote:
Originally Posted by snip3r77 View Post

Anyone uses the 337 here that can comment if there's a SIGNIFICANT difference with the 339?

Cheers.

 

There is a difference of 2, which is .06% and within the margin of error.

 

KP

 

PS. It seems the main difference is the size of the output caps on the 339.


Edited by TheKillerPiglet - 2/18/13 at 6:42am
post #1393 of 2241
I read this review and what was mentioned are as follows.

Here’s what LF had to say: “The output capacitors of 337 series machines is only 50μF but 339 is 130μF, so 339 have more strength in the bass, the structure of 339 is more reasonable, the pipe is on the front far from the the transformer avoiding interference. Especially with low impedance, the headphones can be very clear, 337 has a mild hum when it running low impedance headphones. 339 has better components, tubes: RCA socket by CMC and Headphone socket by Neutrik both make reliability better”.

http://www.headfonia.com/lafigaro-339-my-fav-otl-amp/
post #1394 of 2241
Quote:
Originally Posted by Ultrainferno View Post

 

No, we don't like 337 owners.

Just kidding

Maybe

rolleyes.gif

Grrrrrrrrrrrr very_evil_smiley.gif

post #1395 of 2241

For those interested, I'm selling 2399 Chatham/tung Sol tubes (5998 equivalent). I did a group buy in the Woo Thread and there till are 14 10 8 6 5 tubes left. PM me for more info
 


Edited by Ultrainferno - 2/20/13 at 12:12am
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