[maheeinfy]

@
maheeinfy

In my experience, it's the driver tube that causes hum, not the power one. Have you been able to swap driver tubes with the same RCA 6AS7G?

you might be right. my new Russian Tung-sol 6SN7 hum a lot, but the GE doesn't. But it could also be because the TungSol needs some burn in to get rid of the hum

 

[MajorRocker]

you might be right. my new Russian Tung-sol 6SN7 hum a lot, but the GE doesn't. But it could also be because the TungSol needs some burn in to get rid of the hum

Before I had the fitz mod done any tube I put in hummed like crazy. I think it took 2 days of it on for 24/7 before the hum stopped or at least I could listen and not be bothered. I found that really annoying so I got a family member to do the fitz mod for me. If you plan on changing out tubes often I would do this mod.

 

[Necron99]

you might be right. my new Russian Tung-sol 6SN7 hum a lot, but the GE doesn't. But it could also be because the TungSol needs some burn in to get rid of the hum

Same here! None of my NOS tubes hum at all! I have RCA, Silvertone, and a Tung-Sol, but a US built version, and none hum. The newer Russian Tung-Sol hums. Hmmm, guess I have some burn in time to do!

 

[dobigstuff]

If you can get a NOS RCA 6AS7 you will enjoy. There should be no hum at all. I will post 4 combos I have used.

 

[dobigstuff]

Darkvoice with JAN Sylvania 5998A Power Tube and Sylvania 6SN7 GTB Driver

 

[dobigstuff]

NOS USA Tung-Sol 7236 Power w/ NOS USA Tung-Sol 6SN7Driver

 

[dobigstuff]

NOS RCA 6AS7 Power w/ NOS USA Tung-Sol 6SN7 Driver

 

[dobigstuff]

This is the Best Combo for me:

New Western Electric 421 A Power Tube w/ USA NOS Tung-Sol 6SN7 Driver

Happy Tube Rolling!!

 

[ohsigmachi]

This is the Best Combo for me:

New Western Electric 421 A Power Tube w/ USA NOS Tung-Sol 6SN7 Driver

Happy Tube Rolling!!

I have a vintage GE 6080 6AS7 power and a NOS Silvertone 6SN7GTB driver arriving soon.

Super psyched for this combo!

 

[maheeinfy]

Before I had the fitz mod done any tube I put in hummed like crazy. I think it took 2 days of it on for 24/7 before the hum stopped or at least I could listen and not be bothered. I found that really annoying so I got a family member to do the fitz mod for me. If you plan on changing out tubes often I would do this mod.

is the fitz mod easy to do? is there a guide

 

[MajorRocker]

is the fitz mod easy to do? is there a guide

There is no guide I went off a picture here is a link on this very forum https://www.head-fi.org/threads/dv-336se-hum-fitz-mod.353079/page-2#post-5248489 and as long as you know how to solder you are just soldering in 2 220uf capacitors. Just follow the picture of where they go. I used gold Nichicon 50V 220UF capacitors.

 

[maheeinfy]

I see two adapters for the 6SN7. Which one is the correct to use with DV ?

6922 to 6SN7 adapter
12AU7 to 6SN7 adapter

 

[rusnak666]

Hi, im new in tube rolling, do you any of you know JJ tubes? I found 2A3 - 40W and 300B tubes, charakteristics are:

A. F. TRIODE
Base: 4-PIN CERAMIC BASE
Uf = 2,5 V
If = 2,5 A

Typical characteristic:
Ua = 250 V
Ug = -45 V
Ia = 60 mA
S = 5,25 mA/V
m= 4,2
Ri = 800 Ω

do these tubes work in darkvoice 336se? Thanks

 

[ohsigmachi]

Hi, im new in tube rolling, do you any of you know JJ tubes? I found 2A3 - 40W and 300B tubes, charakteristics are:

A. F. TRIODE
Base: 4-PIN CERAMIC BASE
Uf = 2,5 V
If = 2,5 A

Typical characteristic:
Ua = 250 V
Ug = -45 V
Ia = 60 mA
S = 5,25 mA/V
m= 4,2
Ri = 800 Ω

do these tubes work in darkvoice 336se? Thanks

No the 300b tubes donçt have the right number of pins.

The Darkvoice takes 6AS7G / 6520 / 6080 tubes.

 

[bluzeboy]

I, ve been using a GE 5998A power tube & suddenly it started un seating itself after I turn off the amp

If re seat it works fine,what could be causing to lose it seat?