Tubes Asylum Questions about tubes and gear that glows. FAQ

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Tubes Asylum ]

---

[ Alert Moderator ]

---

RE: Sylvania 6550 dissipation

Posted by Steve O (A) on November 23, 2016 at 10:51:41

In Reply to: RE: Sylvania 6550 dissipation posted by DannyR on November 23, 2016 at 09:37:18:

Tube rating can be confusing because three different ratings systems were in use during the prime tube years: Design Center (most conservative), Design Maximum (moderate conservative) and Absolute Maximum (least conservative). Tungsol 6550s (genuine) were originally rated @ 35W under Design Cemter but were later up-rated to 42W under Design Maximum system. GE 6550A were released with Design Max rating of 42W and never carried a Design Center rating AFAIK. Not sure where Sylvania fits into all this. They were not as widely used as Tungsol or GE.

This post is made possible by the generous support of people like you and our sponsors:

Signature Sound

[ Signature Sound Lounge ]

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---