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Old 3rd January 2012, 04:53 PM   #291
kevinkr is offline kevinkr  United States
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Quote:
Originally Posted by tinitus View Post
EL34 fore preamp ? that would be 'a first time, wouldnt it ?
It would work OK, might not sound as good as the triode connected 6V6 - not sure, interestingly enough the 2A3 sounds quite nice in line stage applications.
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Old 3rd January 2012, 05:21 PM   #292
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It could, but the dissipation should be much higher than 6V6 class which is already nicely linear in triode. Fat older ST bottle (Coca Cola style) 6V6 tend to sound mellower and be more ringy in this application. In power amps the output transformer ratio extinguishes the voltage gain into current transformation so microphonic behavior its not noticeable.
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Old 3rd January 2012, 05:24 PM   #293
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...and what about the EL84? Close enough to the 6V6 and good sounding.
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Old 3rd January 2012, 05:32 PM   #294
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Has been discussed in the thread's start. 6V6 was only the beam tetrode Yankee reply to the Eindhoven extra grid patent, they are same class different taste. At 5W dissipation in my preamp I would still argue pro American tubes bigger envelope in this class. 0.0048% THD+N in Gregory's CF and -120dB to -143dB 20Hz-20kHz noise floor in post #231 is not a particularly disappointing result anyway.
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Old 3rd January 2012, 05:38 PM   #295
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Certainly no complaints on my end. I concur with the characteristics between the coke bottle and straight glass. Found an old Delco 6V6GT in my tube box that checked out fine. Has a bit more in your face feel. May order a few Tungsol ST's for fun.

I do have a couple of the small tube mentioned earlier. May have to play with that in the next day or so.
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Old 3rd January 2012, 05:40 PM   #296
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Quote:
Originally Posted by kevinkr View Post
It would work OK, might not sound as good as the triode connected 6V6 - not sure, interestingly enough the 2A3 sounds quite nice in line stage applications.
There was a Manley 300B preamp also I think.
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Old 3rd January 2012, 05:41 PM   #297
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Scott:

Still on active cathode load in your follower?
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Old 3rd January 2012, 05:54 PM   #298
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For the time being. Work has me occupied for a bit. All I can do right now unfortunatley is listen ;-)

Now about the 300B. I have two Mesh Plates sitting on the shelf.
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Old 3rd January 2012, 05:56 PM   #299
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Which one CCS you use? A resistor ought to give some more THD when you will test switch and a noticeably different sonic, maybe less ''monitor''.
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Old 3rd January 2012, 06:18 PM   #300
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