Home » Audio » Thermionic Emissions » New Production Tung Sol 6550, Penta KT88s (Concerning Audio Quality)
Re: Demagnetizing Tung Sol 6550, Penta KT88s [message #96529 is a reply to message #96527] Thu, 16 March 2023 22:17 Go to previous message
positron is currently offline  positron
Messages: 89
Registered: May 2020
Are the Penta tubes manufactured by Psvane Bruce?

I do not know how old these tubes are.

Supposively not many hours.

Metal band around bottom is hanging/extremely loose on one tube.

No red plating is occuring. I am running the idle plate dissipation
around 30 watts, in triode mode, so includes the screen, and the
output is around 20 watts. So not a real test of the quad given your information.

The bass is shy to me, midrange sounds great though,
but I can't pull the trigger on them. They are loaned
to me, so not out money for this test.

Cheers and thanks for the info Bruce.


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