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I sent the spec sheets to Cayin. . .

for the 5R4GY and they said it is fine. So I assume, with their years of experience it hopefully is. I know they are fairly conservative, as a manufacturer should be.

I was watching the heaters on the GY come on and they were slower than the rest of the tubes, KT170 and 6SN7 types. I could put in my test sockets and measure but just don't feel like it at this time.

I do enjoy tubes. Used them as a radioman in the military and building my first tube receiver in high school in the latter 1960. Thank god my hearing is still really good so I can enjoy music etc. :^)


iBasso DX300MAX Ti. Focal Utopia and Stellia. iBasso SR2. Mr. Speakers, Ether II, Voce stats. Manley, Absolute headphone amp. LTA MZ3, Z10e electrostatic amp. Many other headphones, amps, cables etc.

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