Jadis Defy can't sing with super high Fidelity PART 2

@mozartfan So, in your not so humble opinion..Cayin is superior to Jadis and KT88’s are superior to KT`150’s. Even though you rolled into your Jadis amp the wrong tubes( the KT150's)...and were lucky ( probably due to the extreme build quality) that your amp didn’t go up in smoke! IMHO, you sir- are one clueless hobbyist!

I haven't read the whole thread, but my recollection is that, unlike the old generation Jadis mono amps (JA30, 80 and 200), the original Defy 7 was not an autobiasing amp and could only use the 6550 tubes.  To use other tube types in it, you (or, if like me you're not technically inclined, a good tech) would have to go inside the unit to set the proper bias, not an easy job.  So any shootout of tubes will, in my view, not be particularly reliable, and could in fact damage the amplifier. I would caution against it. 

Also, from a quick read it looks like you're changing or looking at changing the internal capacitors, etc. in the amplifier.  You should keep in mind that by doing this you are changing the sound from the Jadis house sound.  You may find you like the new sound better, it may be a more "accurate" amplifier, but please don't call it a Jadis anymore.  I've had friends who got modded Jadis amps and had those mods undone because the Jadis house sound they wanted was lost.  Jadis may not have used the most expensive or transparent components in their amplifiers, but the components were chosen in part because they gave the designers the sound they wanted (and I'm sure cost had something to do with it).  If you change that sound and don't like it, please don't blame Jadis.   

@ davey
well  your are correct,, the roll to a  150, although Jadis does list a  few amps which can accept the 150,, this Defy is ,, maybe cerca 2000, so not built fora  150,,my bad,, now i consult with my tech guy on any mods.
btw each tube has a  fuse,,so  a fuse will blow pre any damage to the  huge beefy trans.
@ reprince,,
I'm sure Jadis placed the finest parts made at that time in their amps, These M caps are designed , 2012, they add to the separation of fq's, boost clarity, I think there is more to be gained from the new cas, which is why i am going back to the Svetlana 6550's,,which vivatubes says are identical to the Svetlana 6550's which came with the amp. 
I sold those off last year for 250/NOS and bought  the new release for close to 500, not a  good move,,, I did not even hear the NOS,, just assumed that I loved the kt90 EI in the JOR so much, that I figured the kt90 was my tube sound. .. sold off the 90's at half price also, new tubes.
,,so yeah, davey is right,, i need to slow down rethink all  mods,, randy has been a  big help now on whicch mods to go with
Right now as i wait on 6550's to come in,, he is chaging all----maybe not the 4 big electrolytics,, can't recall if we are holding on those, as each is $125-- need to write him today,, see what we are going with. 
So all other smaller electrolytics are be chamed to  either Nichicon or F&T's, can't recall  which lab  we decided on. 
Randy changed the electrolytics in his Golden Tube  to Nichicon's and noted a  nice  sonic gain . 
 The power electrolytics are going on 20 yrs now, best to  change out. 
Thats all i am doing,, not  making any mods on the design of the amp, = post mods   will be a  Jadis amp. , same characteristics.
I plan to buy a  meter and Randy will show me how to bias.
Will post a  vid once everything is up N running. 

@mozartfan, A fuse will blow before your transformer gets damaged? (not necessarily!)-  the fact that you rolled in a KT150 which a) you couldn't get to bias and b) needs about 600+ volts on the rail..which your transformers were absolutely NOT designed to accommodate. You got lucky my friend, pure and simple...and the fact that the Jadis transformers are built like a tank...I strongly recommend that you get a professional tech's advice before doing something stupid like that again! 

Hey Davey
Yeah my tech guy jumped on me about making rash, , unreflective/not well resrached deciosions about rolling tubes,, Like swapping the 12au7's for the awesome looking E80's, =  The Defy nor the Lite pre (12at7) liked the E80 in the socket..
man that e80 such a beauty.

well those following my journey,,,its comming down to this.
The cayin SC6 Mark2, is not long off, 2 weeks order placed.
If that pre does not trump the Lite (Jadis clone) then I have to options
A) sell the Defy when a  jadis Intergrated comes avaliable
B) purchase a  new Jadis JPL pre at a  bank busting $10 Grand.
I am going to miss the neutrality of the Defy, and its power to deliver solid bass.
+ all the new M caps, + new electrolytics. +  pure copper terminals, speaker/connect posts, etc,,
Randy just called, he will keep the 88's in post new mods,, than later on we can roll to the Svetlana 6550's. 
..So hang in there for 
Part 3 < does the defy have the power to sing likea  Italian tenor?>
stay tuned.
p
new orleans