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Re: Demagnetizing Tung Sol 6550, Penta KT88s [message #96527 is a reply to message #96526]

Thu, 16 March 2023 21:28

gofar99
Messages: 1949
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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[Message index]

		New Production Tung Sol 6550, Penta KT88s By: positron on Wed, 18 January 2023 23:01
		Re: New Production Tung Sol 6550, Penta KT88s By: positron on Sat, 21 January 2023 18:24
		Re: New Production Tung Sol 6550, Penta KT88s By: Wayne Parham on Sat, 21 January 2023 20:48
		Re: New Production Tung Sol 6550, Penta KT88s By: positron on Sat, 21 January 2023 21:33
		Re: New Production Tung Sol 6550, Penta KT88s By: positron on Sun, 22 January 2023 17:28
		Re: New Production Tung Sol 6550, Penta KT88s By: gofar99 on Mon, 23 January 2023 20:25
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Mon, 23 January 2023 22:12
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Tue, 21 February 2023 22:45
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Mon, 26 February 2024 21:44
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Fri, 21 June 2024 17:29
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: gofar99 on Fri, 21 June 2024 20:50
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Fri, 28 June 2024 11:28
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: gofar99 on Fri, 28 June 2024 20:46
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Tue, 02 July 2024 00:14
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Thu, 16 March 2023 15:30
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: gofar99 on Thu, 16 March 2023 21:28
		Re: Demagnetizing Tung Sol 6550, Penta KT88s By: positron on Thu, 16 March 2023 22:17
		Re: New Production Tung Sol 6550, Penta KT88s By: Wayne Parham on Tue, 02 July 2024 13:50
		Re: New Production Tung Sol 6550, Penta KT88s By: positron on Tue, 02 July 2024 23:41
		Re: New Production Tung Sol 6550, Penta KT88s By: gofar99 on Wed, 03 July 2024 11:09
		Re: New Production Tung Sol 6550, Penta KT88s By: positron on Sun, 07 July 2024 20:26
		Re: New Production Tung Sol 6550, Penta KT88s By: positron on Wed, 28 August 2024 23:11
		Re: New Production Tung Sol 6550, Penta KT88s By: positron on Sun, 06 October 2024 22:36

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Sonic Difference between New Tung Sol 6550 vs KT120 vs KKT150

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