Hi Folks,
I'm a newbie in tube audio. A friend of mine gave me a modul kit (assembled) of
LS7B PreAmp Tube Marantz 7 Clone.
After I read some threads, I know some of you would say that this PCB/Kit is a "junk" but since I spent no money for it I think I should try it.
I plan to to finish assemblying it as I already all necessary parts but I need some knowledge on how to complete the PreAmp.
1. How do I set the B+ of this PreAmp? Should I do it by turn the VR1 (20 Kohm)?
2. If I should so, should I put all the tubes in place?
3. What is the best value of B+ for it?
(I use 2×EHG12AX7, 1×EHG12AU7 and 2×JAN5687).
Thanks and appreciate any advise from you guys, the tube masters!
I'm a newbie in tube audio. A friend of mine gave me a modul kit (assembled) of
LS7B PreAmp Tube Marantz 7 Clone.
After I read some threads, I know some of you would say that this PCB/Kit is a "junk" but since I spent no money for it I think I should try it.
I plan to to finish assemblying it as I already all necessary parts but I need some knowledge on how to complete the PreAmp.
1. How do I set the B+ of this PreAmp? Should I do it by turn the VR1 (20 Kohm)?
2. If I should so, should I put all the tubes in place?
3. What is the best value of B+ for it?
(I use 2×EHG12AX7, 1×EHG12AU7 and 2×JAN5687).
Thanks and appreciate any advise from you guys, the tube masters!
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