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Recommend 300b tubes for Frankenstein Amps

I purchased a pair of used Kr 300b Ballons with about 100 hours for my Coincident Frank. Amps. It is or was an excellent match with my Total Victory IV Loudspeakers. At about 60 hours of play one of the tubes went dead .
So my question is .
Is there another that is reliable that sounds as good as the Balloons ?
Any suggestions are appreciated.
abill
sounds_real_audio
985 posts
 
Are you sure the tubes are at fault? You would not want to replace them with expensive tubes only to have that happen again.
montejay
285 posts
 
The KRs sound wonderful but are not reliable
I didn't get 100 hrs out of one of mine
Try the Black Bottle from Shugung or the Full music 300b/c carbon plates that I am currently using
They sound great with the Franks
brf
1,715 posts
 
Emission Labs 300B-XLS, or if you can adjust the bias and get away with less output try the EML 300B-mesh.
charles1dad's avatar
charles1dad
10,249 posts
 
Abill
I have about 500 hours on my Shuguang Treasure Series(Black glass) tubes. They sound wonderful and have been reliable.I got them from Grant Audio for 600.00 per pair, not cheap but I have no complaints. The Frankenstein MK2 amps are top tier and deserve premium tubes. Israel Blume has warned amplifier owners about premature failure with these KR tubes,
abill OP
80 posts
 
Thanks everyone for the responses. I emailed Israel and he also recommends the Black Glass. He said they sound as good as the kR Balloons and are very reliable. He is currently using a pair as we speak.
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