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 messageGo to next message
positron is currently offline  positron
Messages: 97
Registered: May 2020
Viscount
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.

pos

Re: Demagnetizing Tung Sol 6550, Penta KT88s [message #97463 is a reply to message #96412] Mon, 26 February 2024 21:44 Go to previous message
positron is currently offline  positron
Messages: 97
Registered: May 2020
Viscount
positron wrote on Tue, 21 February 2023 22:45
After more testing/auditioning, I prefer the Pentas over the
Tung Sols. I find the new Tung Sols are still zingy in the highs.
The Pentas are just slightly fuller compared to the Tung Sols.

That is it for now.

Cheers

pos

I am eating some crow now. I just checked and the new Tung Sols (gift years ago) I have been using needed to be demagnetized again. The JJs not so. There is also a difference in the midrange I think I like better with the JJ KT88s.

cheers

pos
Previous Topic: Class A, AB1, B, C Operation/Modes
Next Topic: Update on Previous Info on Oddwatt Amp issue
Goto Forum:
  


Current Time: Wed Jun 19 06:30:23 CDT 2024

Sponsoring Organizations

DIY Audio Projects
DIY Audio Projects
OddWatt Audio
OddWatt Audio
Pi Speakers
Pi Speakers
Prosound Shootout
Prosound Shootout
Miller Audio
Miller Audio
Tubes For Amps
TubesForAmps.com

Lone Star Audiofest