Tubes "Closely" Matched

[jdwdmi]

I am a newbie when it comes to tubes, and I ordered a quad of "Closely"

matched old stock tubes, until now I have used new production 6CA7 EH,

and EL34 EH. Is there going to be any problem running them in my integrated

amp being that they are not perfectly matched? I have a Cayin A50T with a

quad of EL34's, a pair of 12ax7's and a pair of 12au7's. The amp has manual

bias controls for all the EL34's. Hoping I didn't burn myself..:scratch2:

 

[jaymanaa]

Nah, you're fine as long as you have bias pots for each tube.

 

[jdwdmi]

Thanks for your quick reply, I wont sweat it. Ordered some Mullard XF2's,

can't wait to give them a listen.

 

[jaymanaa]

Thanks for your quick reply, I wont sweat it. Ordered some Mullard XF2's,

can't wait to give them a listen.

When you get those biased up, you won't need anything else. Save your money for front end tubes. Any chance of seeing a schematic of the amp?

 

[jdwdmi]

Sorry for the ignorance what do you mean front end tubes? I have replaced

the 12au7, and 12ax7 with Raytheon blackplates, they say Baldwin on them.

No schematic, Cayin says it point to point wiring, suppose to be inspired by

Marantz 8B. I honestly dont know how it stacks up in build against other

amps, I bought it to get a taste of tubes, and I am Loving the sound!

 

[jdwdmi]

Should I bias them the same as the EH, around .35 ma?

 

[jaymanaa]

Should I bias them the same as the EH, around .35 ma?

Yep, they will last a long, long, time at that current.:yes:

 

[keybank]

Should I bias them the same as the EH, around .35 ma?

The EL34's at 0.35 mA? Hopefully you didn't mean to put in the decimal point...

 

[jdwdmi]

....Like I said I'm a newbie.