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What EL34 to use in SE34I.3 a/k/a "Rachel" (Read 1206 times)
Rivieraranch
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What EL34 to use in SE34I.3 a/k/a "Rachel"
03/06/12 at 03:40:48
 
I was wondering whether you could use a JJE34L, which has a slightly higher grid voltage rating (-13.5 to-16.5 vs -10 to -13.5 volts) than the traditional EL34.

If not what kind of EL34 would be a good match for this circuit?
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Lon
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Re: What EL34 to use in SE34I.3 a/k/a "Rachel"
Reply #1 - 03/06/12 at 03:45:51
 
I've used those with success in my .2 model. The pair that worked the best for me in the .2 was surprisingly a pair of the Mullard reissues. A nice tube for "all seasons" so to speak.
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Rivieraranch
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Re: What EL34 to use in SE34I.3 a/k/a "Rachel"
Reply #2 - 03/06/12 at 03:47:40
 
I'm considering flipping Jim McShane email asking him about the ones he carries. I was wondering about the Winged C. They are getting expensive.
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DECWARE CSP2+, TABOO; MINI TORII SE #33; SE84CKC; MG944 speakers; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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Rivieraranch
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Re: What EL34 to use in SE34I.3 a/k/a "Rachel"
Reply #3 - 03/12/12 at 23:45:42
 
McShane told me that the Genalex reissue KT-77 is the best tube
of the family tonally.

The Mullard Reissue EL34 is second place.  

The 6CA7 fat bottle EH tube is a terrific bottle, according to McShane. It has excellent bass and a nice top end. It isn't as warm as the other two, but it's a really fine sounding tube.

Mcshane told me that the Chinese tubes are "okay." This is far from a ringing endorsement.

He does not carry JJ octal tubes due to what he termed incredibly poor quality.
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DECWARE CSP2+, TABOO; MINI TORII SE #33; SE84CKC; MG944 speakers; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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Lon
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Philip K. D*ck

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Re: What EL34 to use in SE34I.3 a/k/a "Rachel"
Reply #4 - 03/13/12 at 03:26:37
 
Myself, I've never liked the sound of KT77s but I've never heard them in a Decware amp. Still, the Hazen Grid mod doesn't affect that tube type.

I've used a pair of EL34 Mullard Reissues in my Integrated .2 and they were very very nice. One of these days I'll try a quad in my Torii.
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Decware:ERR,HR-1,Styx,ZP3,CSP2+(2),Torii Mk III
PS Audio PWT and PWD Mk II,PowerBase (2), PPP,AC-12 pc
Sony BPD-S5000ES
Denon DCD-A100
Rega RP3+TTPSU,white belt and Exact2
Cryoset, VooDoo AudioICs
Mapleshade Samson v2+v3 and 4"platforms
Herbie's Audio Lab p
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alper_yilmaz
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Re: What EL34 to use in SE34I.3 a/k/a "Rachel"
Reply #5 - 03/13/12 at 10:15:25
 
I am currently running a pair of reissue Genalex KT-77's and despite not benefiting from the Hazen Grid Mod, they have given me the best sound so far, with lots of air around and a much nicer bass response than the other tubes.

The amp originally came with the Mullard reissues and they are nice as well; yet nowhere close to the KT-77's.  

The big bottle EH's did nit impress me much somehow.  The JJ EL-34's are quite fine; the most silent of the bunch; yet not extraordinary in terms of sound.

I also tried a pair of Siemens NOS EL-34's.  They seemed to boost the noise coming from the CSP, so I took them out immediately.  I should give them a second chance for sure.  I might be totally wrong about the source of the noise though.  Somehow, as soon as I bring the CSP in the signal chain, there is some hum, which does not cut the mix, yet disturbing for an OCD like myself!  :)

Best,

Alper
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Lon
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"Love without
guts is
worthless!"
Philip K. D*ck

Posts: 5232
Re: What EL34 to use in SE34I.3 a/k/a "Rachel"
Reply #6 - 03/13/12 at 13:09:40
 
Interesting. Thanks for sharing.
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Decware:ERR,HR-1,Styx,ZP3,CSP2+(2),Torii Mk III
PS Audio PWT and PWD Mk II,PowerBase (2), PPP,AC-12 pc
Sony BPD-S5000ES
Denon DCD-A100
Rega RP3+TTPSU,white belt and Exact2
Cryoset, VooDoo AudioICs
Mapleshade Samson v2+v3 and 4"platforms
Herbie's Audio Lab p
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