JADIS ORCHESTRA


Hello,
I got my amp today. It was an orchestra not a JOR! Is there much difference between the two? Secondly upon arrival I noticed that a blue cap (if that is what it is, has letters BC and numbers like 470 uf m on it) had become dislodged in transit. What do I need to do to get this back into place? Do I need to take it to a tech? Any advice would be great as this is my first tube amp and I don't know anything about electronics. A new journey and lots to learn.
aussiedrummer

Showing 6 responses by aussiedrummer

Thanks to you all,
Just the solder joint I think.The two tabs are still there. I took the amp to a retired person,he was recommended to me by a hi fi exchange shop. He thinks it was a cost cutting measure and poor design that led to the the cap being dislodged. Which tubes would you recommend I run on this amp? I was planning on running KT88 to get a little more bass and drive my old ProAc super towers.I have 6CA7 and 2A7EH?? I think.Should I upgrade the binding post or anything else? I am not worried about the cosmetics just the sonics. Thanks to you all.
Cap is now are fixed. Yay!Comments were that the cap is held by a rivet and the spacer was stopping the two tabs to reach down past the chassis and get soldered properly.All hand made he said,great point to point workmanship but thought that the finish was reflective of a Chinese made amp. He also said that the heaters of all the output valves were wired in series and he would advice that this could be done in a better manner. He lost me here when he mentioned cathods and so forth. Could someone explain in lay man terms what this all means? I was working and on the phone so did not have the time to ask for explainations.He said he is going to change that. He also said that we needed to measure current as well as adjust bias so he will drill the additional holes to do this. All in all the amp is running and is to be auditioned next to his solid state amps and ribbion speakers on Monday.

Trelja, thanks for all the advice you seem to be guru in regards to these amps. Thank you sir. I gather from your response that I can use KT88 tubes. Am I correct?

I shall try the JJE34L or the Shuguang 12AX7B.
All of you have been very helpful and I have learnt a lot about tubes and I only picked it up last night.I am sure I have lots more to learn and am sure I will be learning till I lay to rest.


wow! I heard them with ribbon speakers and an active cross over while the bass being driven by another amp. Sounded really easy a little bright and slow to what I am used to. Great imaging and no fatigue after two hours of listening and chatting. Keith Garret and Jack Dejohnette and Sonor Lights in scandi birch finish, what a dvd. Wow!Keith and his theatrics can be a little too much to watch.
Hooked the amp to my proac supper towers and the highs and mids were like never before. The detail was amazing but the bass was really mellow and faint. I heard Jaco Pastorios and heard things I have not heard before. Melody Gardot sounded sublime, yet Katie sometimes fell short and I have always loved Melua.
Learnt how to adjust the bias. Thank you Trelja for lesson 1.
nearly out of batt so will continue later as charger is at work.
All in all great day!!!
Got hold of my wife's Apple.
In saying that the bass is not as prominent as with my Music Fidelity
must say that whatever bass is heard sounds almost as it should. The kick drum sounds natural and double bass as it does when played next to you. Amazing! Just wish it was not overshadowed by the mids and detailed highs.

I think I will try the KT88 valves as Bob seems to think the amp will be fine with them. He does not see any reason why we can not use them.

For a Class B amp. It sounds great.

Also saw a pair of Audio Note mono blocks sitting under the bench, maybe next time I shall ask Bob if he would be kind enough to hook those up for a demo.

I have a lot to learn and it will take me a while as I have an arts back ground but i think i like all this science with atoms, cathodes,anodes and grid stuff.Ha Ha

Thanks to you all for all the help and advice.

And yes sir I would like lesson 2 if you ever have a few minutes to spare.

Thanks again
Yes, I am indeed. Can not win them all mate. Gotta let the others feel like they can play to. Thanks
I heard a friends Jor with original tubes andsounds great with proac response 1.5.Bass was still a ted lacking in my humble opinion. I was told that he got a lot more bass and balanced sound across all ranges when he auditioned the amp with a pair of Focal speakers as these speakers did not need to be driven with as much power as my proac super towers or his 1.5's.
I really do not want to spend 3K on speakers after buying the amp whilst having all my other gear on hand. I think that will be asking for it and the divorce papers will be called for.
I shall take your advice and try new tubes. Trelja, do you think the super towers will be a good match with my amp and the 12AX7B? I would really like to try the KT88 but am not a huge fan of doof doof. A warm round even sound is what appeals top me.Could you tell me what sort of silver power chord,i should go for? I will need one that fits into our socket.
Still love the amp.
Let the tweaking Begin!!
cheers