Home » Audio » Thermionic Emissions » New Production Tung Sol 6550, Penta KT88s (Concerning Audio Quality)
Re: Demagnetizing Tung Sol 6550, Penta KT88s [message #96527 is a reply to message #96526] Thu, 16 March 2023 21:28 Go to previous messageGo to previous message
gofar99 is currently offline  gofar99
Messages: 1947
Registered: May 2010
Location: Southern Arizona
Illuminati (5th Degree)
Hi, A diyer of some of my projects reported issues a while back (4-5 years) with Psvane KT88s. They were not thermally stable and were unable to dissipate anywhere near the ratings for a KT88. This parameter is vip in the amps I design as they run class A. He reported that they would only handle about 50% of the rating before serious red plating began. He had them replace several set and all did the same thing... They may be OK now but I have no way of knowing.

Good Listening
Bruce
 
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