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Favorite 300B: Sophia vs KR


Which do you prefer; S.E.T. Princess 300B Carbon Plate or KR 300B WE Clone?

I've only experienced NOS 40's/50's WE so my expectations are pretty high. Which do you think captures the essence of the WE most closely? I'm trying to keep the cost down as much as possible so EAT is not an option, as much as I was blown away by their KT88. I considered current WE but they're not in production until Spring 2011.

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sakahara
phaelon's avatar
phaelon
1,038 posts
 
"And when the 300Bs are in service I will leave them on constant without powering off for a month or more straight at a time.”

Isochronism, Just a heads-up: In order to maximize their longevity, Sofia recommends that these tubes should not be left on for more that five hours at a time.
gsm18439
895 posts
 
Is this true of all 300b? Or only Sophias?
charles1dad's avatar
charles1dad
10,249 posts
 
Gary,
I don`t believe this is universally true for the 300b.I have EML,AVVT,Shuguang BT and Takatsuki and none of these came with this type of warning/limitation of playing time.
I`ve used them with the amplifier on morning to night without any problems. Sophia Electric may have their own chosen restrictions.
Charles,
isochronism
2,893 posts
 
I will always have the tuner playing.
phaelon's avatar
phaelon
1,038 posts
 
Just to be clear. I received no formal, written restrictions from Sophia. It was during a casual conversation with Sue that I received the five hour advise. Most of my friends, who have tube amplifiers, also try to minimize very extended sessions. I thought that this was common understanding. If this is unusual, I would welcome the thoughts of some of our more technically advanced members.
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