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Tube rolling the CSP2 (Read 21826 times)
Francesco
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Re: Tube rolling the CSP2
Reply #30 - 09/29/13 at 13:38:32
 
I Riviera ranch
Wath is this the tubes configuration for your Preamp?
du you use the 6Q7B, wow is sound?
Francesco
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Rivieraranch
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Re: Tube rolling the CSP2
Reply #31 - 09/29/13 at 18:31:34
 
Lord South here is the expert on tube swapping in this amp.

I am using GE 6BQ7A tubes screened for Tektronix. They are drier and more accurate than the standard 6N1P-EV.

You might want to start with 3 6N1P-EV tubes in all positions and work from there.

Try 6BQ7A; 6922, 6N23P, 7308 and if you haven't lost your mind then you can venture into the exotic - E188CC; E288CC, etc.
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KobeeDog
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Re: Tube rolling the CSP2
Reply #32 - 04/26/14 at 02:07:03
 
I have a spare Gold Lion 6922 laying around. Has anyone tried this tube in the #1 position?
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will
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Re: Tube rolling the CSP2
Reply #33 - 04/26/14 at 04:26:12
 
I have tried a lot of various tubes in the first postion. It will work there. Why not give it a listen?
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KobeeDog
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Re: Tube rolling the CSP2
Reply #34 - 04/26/14 at 20:00:42
 
Tried it. Sounds pretty good. Sounds more and airy than the previous tube in there, which has always been my experience with 6922 tubes.

I'm guessing 6922 will work in the other spots as well?

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Lon
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Re: Tube rolling the CSP2
Reply #35 - 04/26/14 at 20:14:25
 
Yes, it will.
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KobeeDog
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Re: Tube rolling the CSP2
Reply #36 - 04/29/14 at 02:46:16
 
OK, I tried the 6922 in the front slot and it caused a noticeable hum, an unforgivable sin, in my opinion.

I put the original tube back in, and no hum.
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will
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Re: Tube rolling the CSP2
Reply #37 - 04/29/14 at 04:10:34
 
I am a little confused. I thought when you first tried the gold lion 6922, and it sounded good, it was in the "1st" or front position??? I suspect that if it caused hum there, it is likely that tube itself rather than the tube type or the pre-amp. In my experience, it is the second position (pair) that can be a little tricky.
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« Last Edit: 04/29/14 at 04:48:07 by will »  

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KobeeDog
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Re: Tube rolling the CSP2
Reply #38 - 04/29/14 at 11:40:00
 
The preamp originally came with a Sylvania tube (not sure what kind, but I don't think a 6922) in the front position.

I swapped that out the other day for the Gold Lion 6922. I'm not sure if the hum started last night (when I first noticed it), or if it had been there all along.

I suspect it just started, because with music not playing, I can hear the hum from my listening position, about 10 feet away. I would have noticed that before, right?

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Luis
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Re: Tube rolling the CSP2
Reply #39 - 03/01/15 at 09:15:45
 
Hi, anyone using at the moment a 7dj8 as input? I was wondering how this could sound with two 6n1p-ev. Thanks, Luis
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mark58
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Re: Tube rolling the CSP2
Reply #40 - 03/01/15 at 13:22:04
 
Luis, I haven't used that tube type but I know Will has and really likes them but I don't know if he's tried it in a CSP.  He's talked about them in his Torii MK IV and III.  He'll give you his impression when he gets on today.  Mark.
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"The man that hath no music in himself, nor is not moved with the concord of sweet sounds, is fit for treasons, deceptions, and spoils;
The motions of his spirit are dull as night and his affections dark as Hell. Let no such man be trusted." William Shakespeare
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Luis
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Re: Tube rolling the CSP2
Reply #41 - 03/01/15 at 15:14:20
 
Good to know, thanks Mark. Luis
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mark58
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Re: Tube rolling the CSP2
Reply #42 - 03/01/15 at 15:36:49
 
Luis,  I'm nearing the end of Will's Opus on the Torii MK IV and he lists what he is currently using in his CSP3..."Tubes are now: an American Amperex 7308 in front, a pair of Phillip/Holland E188CC in the power positions, and a 1940's Westinghouse labelled (looks like an RCA) 5R4GY-ST"

I too am using an Amperex 7308 as an input in my CSP3 but I'm using the stock Valve Art 274B as rectifier and a pair of 60's triple mica Russian Military 6N1P-E boxed anode tubes as outputs.  So far this combo is my favorite.  I am not good at putting what I hear into Audio Lingo so I'll leave that to others. My advice, which I found difficult to follow myself, is take it slow.  Only change one thing at a time and live with it for a while before moving on to other changes.  This is a Marathon, not a 50 yard dash.  Enjoy, Mark.
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« Last Edit: 03/01/15 at 15:37:29 by mark58 »  

"The man that hath no music in himself, nor is not moved with the concord of sweet sounds, is fit for treasons, deceptions, and spoils;
The motions of his spirit are dull as night and his affections dark as Hell. Let no such man be trusted." William Shakespeare
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Luis
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Re: Tube rolling the CSP2
Reply #43 - 03/01/15 at 18:34:01
 
I look for the triple mica 6n1p from time to time and I never find any, as much as I like the 6n1p-ev those are some I would like to try! Luis
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ERR, SE341.2, CSP2+, REGA DAC, ZDC200i, Styx & DSR-ll
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mark58
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Re: Tube rolling the CSP2
Reply #44 - 03/01/15 at 18:59:37
 
Luis,  these are the ones from the Russian seller that I, Syd (Marky) and Funch have bought.  I'm not sure why there's a $5 difference. I recommend them. Mark.


http://www.ebay.com/itm/NEW-RAREST-MILITARY-TESTED-PAIR-6N1P-E-boxed-anode-CCa-E...

http://www.ebay.com/itm/NEW-RAREST-MATCHED-BALANCED-PAIR-6N1P-E-military-boxed-a...

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« Last Edit: 03/01/15 at 19:13:56 by mark58 »  

"The man that hath no music in himself, nor is not moved with the concord of sweet sounds, is fit for treasons, deceptions, and spoils;
The motions of his spirit are dull as night and his affections dark as Hell. Let no such man be trusted." William Shakespeare
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