My 12 step program has gone awry
Comments
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Here is an older thread from this forum discussing tube shields.
https://forum.polkaudio.com/discussion/177718/tube-shields/p1Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ * Signature Series Sonore Music Server w/Deux PS * Roon * Gustard R26 DAC / Singxer SU-6 DDC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 * -
I really doubt that a power tube in a preamp is going to get near as hot as it would in a power amplifier output stage.
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What matters here is not how hot the tubes get but extending the life of, what are now expensive, tubes by removing what heat they do produce from the surface of the glass.
I’d prefer to never have to purchase another tube. IERC covers may be the way to do so and if I can’t get those I’ll find others that are similar.Aaron
Enabler Extraordinaire -
I found the Pearl Tube Coolers (not sure if that's the brand above) to deaden the sound on a preamp but didn't have a negative effect on the sound from a 6550 tubed power amp. They were inexpensive enough to try out, at Parts Connexion recommendation, and stash away if not being used.
Yes, those are Pearls.
I like IERC better - especially those with the internal “fingers” instead of plates.
Aaron
Enabler Extraordinaire -
Yes, Chris Johnson threw in a bunch for free to try out when I sent a Sonic Frontiers preamp in for upgrade. They were too much of a good thing on that 12 tube preamp but I did end up using some dampeners on the most important signal tubes to good effect.
