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!
Thanks BinaryMike.
You've just added my schematic library specially for Marantz 7.
Appreciate your info, but the kit has PS section integrated with signal section in single board.
You've just added my schematic library specially for Marantz 7.
Appreciate your info, but the kit has PS section integrated with signal section in single board.
Suggest you post the schematic and any additional information you have. With this stuff on display, you're likely to get more and better advice.
- Status
- Not open for further replies.