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Dark Voice 339 - Page 113

post #1681 of 2571
Snip3r77, vacuumtubes.com have 5998 for sale. They should have the other tubes as well. You can also try thetubestore.com. I usually just google the name of the tube and then visit the websites.
post #1682 of 2571

their is a allen screw loose could that be it ?? 

post #1683 of 2571
Quote:
Originally Posted by wazzupi View Post

their is a allen screw loose could that be it ?? 

highly possible... if that screw is supposed to form a ground somewhere at the front of the amp.

post #1684 of 2571
Quote:
Originally Posted by Contrails View Post

Snip3r77, vacuumtubes.com have 5998 for sale. They should have the other tubes as well. You can also try thetubestore.com. I usually just google the name of the tube and then visit the websites.

Damn they have stocks for TS / Chatham 5998. Any difference between this? TS is better? No adaptor required?
post #1685 of 2571
Same tube, no difference. No adapter needed.
You should really read the 6AS7G tube rolling thread
post #1686 of 2571
Quote:
Originally Posted by Ultrainferno View Post

Same tube, no difference. No adapter needed.
You should really read the 6AS7G tube rolling thread

Yep he is right..it helped me a lot..

post #1687 of 2571
Quote:
Originally Posted by Ultrainferno View Post

Same tube, no difference. No adapter needed.
You should really read the 6AS7G tube rolling thread

Didn't know it existed. I'd go and take a look.

I have quite a bit of 6sn7, can I use this via an adaptor?
post #1688 of 2571

6SN7 is a double triode, you cannot use it effectively in the driver stage here. It's used in completely different typologies than that of the 339, which is imput triode (pentode strapped) and double triode power stage.


Edited by telecaster - 3/22/13 at 3:46am
post #1689 of 2571

could the cause be 2 screws that won't tighten ? I took one of the other allen screws placed them in the hole where the 2 other screws don't tigthen up and it fits perfectly... should I just get 2 similar screws and that would fix my problem ?

post #1690 of 2571
How much is the market price of TS mesh plate now?

Edited by RickEC - 3/22/13 at 8:31am
post #1691 of 2571

Maybe itsbetter to ask whereto get any..as they are getting rare as hell.. And in so the price will skyrocket.. Like the a1834 brown based..prices are outrageous! The 5998's are going up also..soon u pay premium prices fr those as well..mad.gif

post #1692 of 2571

Geez, .... sold much of them about 3 years ago, for 90 dollars a pair. Didn't know they are so rare now. The price of 5998 and the brown based GEC 6as7 are ridiculous now. Used to sell them for 100 a pair.

post #1693 of 2571

Hey Wall-E!

Thanks so much for the image of you latest DK339 mod!

So it looks like you use twisted wire for the heater supply, I guess it could only be good thing regarding noise interférences. Did you had noise issue cured that way?

 

It's not that clear on the photo, did you solder directly to the battery end? I would have thought them to be rather hard to solder because of the metal mass...

 

You don't happen to have Frequency response ARTA graph of auto or fixed/battery bias comparaison?

 

If you fix cathode bias the 6J5 at 1.82V while the bias runs about 2.2V in auto, I would guess you a running less current on the plate is it right? That way it is safer for the tubes.

 

I wanna try the NiCd 2.4V bias and if it's only 10% more than that auto bias, I'll be happy to run the bias little on the hot side as I like to do in my guitar amp!

 

Anyway thanks again for taking time and upload a picture, you are a gentleman!

 

Best to you!


Edited by telecaster - 3/22/13 at 1:05pm
post #1694 of 2571
RickEC, I do not mean to boast but I did pay $50 for three of them (tung sol mesh) just last week. I thought it was an absolute steal.

But I did pay twice the price for RCA 6AS7G n Red 5693 thanks to customs.

So you win some and lose some...
post #1695 of 2571
Quote:
Originally Posted by Contrails View Post

RickEC, I do not mean to boast but I did pay $50 for three of them (tung sol mesh) just last week. I thought it was an absolute steal.

But I did pay twice the price for RCA 6AS7G n Red 5693 thanks to customs.

So you win some and lose some...

Hey lucky basterd! I hate u! biggrin.gif Tell me..where did u find the ts mesh plates? 

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