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Tube advice

I'm thinking about replacing the tubes in my x-10d (Musical Fidelity). Now I know nothing about tubes-I believe the type used is Philips 6922's-I got this from another news group.2 questions. 1.Does it have to be exactly the same serial number or is there a generic form which this number relates to and therefore others I can use? 2.Obviously I'm thinking about changing with more expensive tubes-I'd seen Telefunken mentioned-is it possible to make a major mistake with the more cash is better theory? I appreciate there may be a degree of subjectivity involved in the latter question. Any help appreciatted and thanks in advance, Ben
bencampbella3c8
tml2
234 posts
 
I agree with the stay away from Sovtek.I replaced a Sovtek 6922 with a Valvo Ecc88/6DJ8.Huge improvment.There are other good replacments.Siemens e188c is great if you can find them>Try the boys the The Parts Conection.Also www.tubeworld.com.Amd Kevin at upscale is very helpfull.
bencampbell58d2
1 posts
 
Thanks for the advice guys. Only problem I have is I stay in the UK and prefer to buy from there especially with valves. However there are plenty of dealers here. Thanks again. Ben
elektron
21 posts
 
6922 is an industrial number for 6DJ8 with specific performance requirements to be so designated. 7308 is an even better version of the same tube. Amerex PQ ( premium quality ) 7308's had gold plated pins. These Amperex PQ 7308's are my favorites. A little detective work may yield good results in finding some excellent 6DJ8's. Try to find some New Old Stock (NOS) examples. Best of luck in your quest.
mi3491
36 posts
 
I agree with Rfraudio. I just received my Amperex PQ 7308's for my Melos Maestro preamp. I swapped out the Sovtec 6922's for the 7308's and found a hugh differance in sound quality. Love the Amperex PQ 7308's.
tml2
234 posts
 
I have just replaced my Valvo ECC88 with a siemens 7308/Ecc188.The improvment was fantastic.I swapped it out and latter that day the wife sat down to listen to some tunes.She looked at me and said,how much cash did you drop.The sytem sounds amazing.She figured i had droped some serious cash into it.When i told her it was 70.00 tube she could not believe the difference it had made.I had a freind recomend it to me.He said he has tried every variation in the 6DJ*/7308/ECC88/Ecc188 family.His advice was save your self time and money the Siemens 7308/ECC188 must have the ECC188 designation its the best one you can get.
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