Yaqin and Musical Fidelity Tube Buffer Questions

hi i just bought Yaqin 6J1 i wanna ask any other alternative tube i can upgrade like Elite 6922 or JJ ECC88 because my country hard to find GE tube thanks

QUOTE (cuoreboy @ February 20, 2008 08:43 pm)

hi i just bought Yaqin 6J1 i wanna ask any other alternative tube i can upgrade like Elite 6922 or JJ ECC88 because my country hard to find GE tube thanks

Cuoreboy,

Take a look at one of the earlier posts on this thread from Ian Grant. He gives a link to alternative tubes you can use to replace the 6J1 tubes. The 6922 and ECC88 are alternatives to the 6DJ8 or 6N1 tube, a twin triode. The tube buffer you have uses two 6J1 tubes AND NOT the single twin triode tube Yaqin I use. You should look into the GE JAN 5654W tube as one of the alternatives for your Yaqin that uses two 6J1 tubes. Hope this helps.

Slbenz

QUOTE (slbenz @ February 20, 2008 09:43 pm)

QUOTE (cuoreboy @ February 20, 2008 08:43 pm)

hi i just bought Yaqin 6J1 i wanna ask any other alternative tube i can upgrade like Elite 6922 or JJ ECC88 because my country hard to find GE tube thanks

Cuoreboy,

Take a look at one of the earlier posts on this thread from Ian Grant. He gives a link to alternative tubes you can use to replace the 6J1 tubes. The 6922 and ECC88 are alternatives to the 6DJ8 or 6N1 tube, a twin triode. The tube buffer you have uses two 6J1 tubes AND NOT the single twin triode tube Yaqin I use. You should look into the GE JAN 5654W tube as one of the alternatives for your Yaqin that uses two 6J1 tubes. Hope this helps.

Slbenz

thanks for your information ermm kinda hard to find the GE JAN 5654W i saw some without W

how abt other brand like RCA n etc thanks

QUOTE (cuoreboy @ February 21, 2008 12:13 am)

how abt other brand like RCA n etc thanks

As long as they are equivalent then it should not be a problem. Try searching under 5654 / 6AK5W / 6096 as tubes to search for to replace the 6J1.

QUOTE (slbenz @ February 21, 2008 07:01 am)

QUOTE (cuoreboy @ February 21, 2008 12:13 am)

how abt other brand like RCA n etc thanks

As long as they are equivalent then it should not be a problem. Try searching under 5654 / 6AK5W / 6096 as tubes to search for to replace the 6J1.

thanks for helping now i understand

got anyone modded the Yaqin or GF buffer by changing the capacitor inside ??

QUOTE (cuoreboy @ February 22, 2008 01:37 am)

got anyone modded the Yaqin or GF buffer by changing the capacitor inside ??

Well the Yaqin have two lytics connect in series but connected in the way to make a NP cap - i mean +-/-+ and I just add an Epcos 33uF/400V lytic cap between the hot (+) and the ground wire.

It gives us even more tight bass, bottom end and accuracy. The music have more presence, attack more alive. At least in my system.

Later i'll put some pics.

Adding this small Epcos capacitor help smooth out the voltage and it acts also like a current filter witch improves a clean stability to the valves output.

user posted image

Hmmm???? Wonder if I can do the same thing with my single tube version of the Yaqin Tube Buffer. Now you have me thinking.

Slbenz

ermm i cant wait already my Yaqin 6J1 is on the way just bought 1 unit from ebay
the tube buffer not yet arrived already think how to mod

i think the next stage u change the cap at the in-put n out-put
try to use mundorf or blackgate
heheeh
u change the Epcos its Low ESR cap

if run parallel cap (add another cap) will lower the ESR its thanks

user posted image

y the original cap value is different from urs here stated 100uf 400v ??? just curious

QUOTE (cuoreboy @ February 25, 2008 06:43 am)

ermm i cant wait already my Yaqin 6J1 is on the way just bought 1 unit from ebay
the tube buffer not yet arrived already think how to mod

i think the next stage u change the cap at the in-put n out-put
try to use mundorf or blackgate
heheeh
u change the Epcos its Low ESR cap

if run parallel cap (add another cap) will lower the ESR its thanks

......

I choose Epcos witch is a good electrolytic German cap because that's what i have at hand.

It's not my idea, at least for now, change any polypropilene cap - the ones you mention with a arrow - of the Yaqin. I like the ones it have.

And, imo i think you miss something because i haven't connect any cap in parallel.
I just made a cap bypass between the output power supply and the unity ground.

Also we can minimizing parasitic currents by inverting main plug or, like i do in all my systems, putting everything with the same polarity.

BTW, instead of Mundorf or Blackgates, did you ever tried ELNA caps?

what i know Elna is famous on electrolytic cap Elna warm sounding wut i done for my car amp

Like Rubycon , Panasonic FC , Nichicon , Sanyo OS Con all are good electrolytic cap, if u want for non-polar cap just go for Mundorf , Solen , Hovland , Clarity Cap all is famous polypropilene cap

ops sorry see wrongly liow

i tot u done parallel

another question i saw ur Yaqin the cap value are different with the one i posted

QUOTE (cuoreboy @ February 25, 2008 03:07 pm)

.....

ops sorry see wrongly liow

i tot u done parallel

another question i saw ur Yaqin the cap value are different with the one i posted

You talking about the voltage, right?!
Well, i don't know the values of the resistences that limits the current through the capacitor to a safer limit...or, even the value of the rectifier your Yaqin uses, but i assume they are different from mine.

QUOTE (clint e. @ February 25, 2008 02:25 pm)

QUOTE (cuoreboy @ February 25, 2008 03:07 pm)

.....

ops sorry see wrongly liow

i tot u done parallel

another question i saw ur Yaqin the cap value are different with the one i posted

You talking about the voltage, right?!
Well, i don't know the values of the resistences that limits the current through the capacitor to a safer limit...or, even the value of the rectifier your Yaqin uses, but i assume they are different from mine.

thanks

i cant wait already hehehe where my Yaqin

QUOTE (clint e. @ February 25, 2008 05:51 am)

QUOTE (cuoreboy @ February 25, 2008 06:43 am)

ermm i cant wait already my Yaqin 6J1 is on the way just bought 1 unit from ebay
the tube buffer not yet arrived already think how to mod

i think the next stage u change the cap at the in-put n out-put
try to use mundorf or blackgate
heheeh
u change the Epcos its Low ESR cap

if run parallel cap (add another cap) will lower the ESR its thanks

......

I choose Epcos witch is a good electrolytic German cap because that's what i have at hand.

It's not my idea, at least for now, change any polypropilene cap - the ones you mention with a arrow - of the Yaqin. I like the ones it have.

And, imo i think you miss something because i haven't connect any cap in parallel.
I just made a cap bypass between the output power supply and the unity ground.

Also we can minimizing parasitic currents by inverting main plug or, like i do in all my systems, putting everything with the same polarity.

BTW, instead of Mundorf or Blackgates, did you ever tried ELNA caps?

hi, bro i need help from you finally my Yaqin is arrived.Can you check for me the 4 yellow cap is wut value (the uf and voltage) bcoz mine they already removed

because i will change the yellow cap but mine is blue colour

thanks

user posted image