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Jolida 502B correct tube allocation

Hello,

Greetings from Costa Rica.

I'm a really fan of hearing jazz and electronic music too (weird I know)

At this moment, I have a Jolida 502B with Paradigm Monitor 11 v6, Xindaq DAC and CD Player.

I'm trying to upgrade the Electro Harmonix original tubes and looking for this I asked at tubestore and they answered me:

"You require one 12AT7 and one 12AX7 per channel." (actually the 502B has a salad of 12AX7 brands)

So, I will need a matched pair of 12AX7 plus another mp of 12AT7, that's clear.

My question is: where is the correct location or side for to the AX7 and the AT7 ?

There are 4 sockets, guess left-right = two for channel, but I don't know where to put the AX and AT, outside or inside of each channel ?? Or there is another distribution possible ?

Thanks for your help.
edoll
wolf_garcia
6,734 posts
 
I bet there's a tiny old electronics shop someplace in Costa Rica with a treasure trove of NOS tubes...maybe that's wishful thinking and not the case, but hey...look around...
mechans
3,048 posts
 
If you don't like shiny or typical EH sound I suggest you go with all Mullard (NOS) for the small tubes or possibly the GL reissues (not cheap either). The output I am very enthusiastic about is the Gold Lion reissue KT-88s. They are well worth the extra money trust me on this one. The source I use is Jim McShane over on Audio Asylum.
edoll OP
12 posts
 
Thanks guys!!

@Detredwings...yes, I have noticed some post about the NOS stuff, I think that I will remain on new tubes only.

@Wolf: hope the Gods made you prohet! Believe me: there is nothing here around vacuum tubes...just expert technicians on transistor amplifiers and similars, and only 4-5 five stores with a few of Nakamichi's, Denon, Bose, and very rare to see but sometimes you can find some McIntosh.

Mechans, do you find many difference between the NOS - New Mullard's ?
detredwings
162 posts
 
Don't get me wrong. I really like NOS tubes. I have a nice hoard to prove it. But you mentioned that shipping and customs duties where high in your country. It can get very expensive trying NOS. You should have some tube guys around. Don't give up!

I have never tried the Genalex tubes. I have tried the Full Music and Pasvane and like them both. But they are not cheap.
edoll OP
12 posts
 
Now I got the idea Detredwings...thanks!

I will be shopping the tubes next week I think...

Costa Rica is a very small country, 53.000 km2 ( West Virginia similar size)

and San José and Escazú the main cities fits twice at District Columbia :)) believe me...we need a High End - or vacuum tube store for real!!
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