@billpete If I am reading it correctly, according to Joes Tube Lore the Gold Brand 5751 3 mica black plates are identical to the gold pin 3 mica black plate tubes other than the color of the pins. Per google: " Gold is used on tubes for its inert properties, specifically to prevent oxidation and corrosion on the pins over time. It is not for significantly better conductivity compared to nickel or copper, but rather to ensure a reliable, quiet connection." |
@jetter You may be right. I lost my link to Joe's a long time ago but have notes that I wrote down and I haven't looked at them in years. I still give gold pins a slight advantage as it stays nice and clean and does conduct better than steel. Does it make a difference? I can't really say as I've not had the same tubes in both steel and gold pin to compare. It might be a fun thing to check. As to @slaw finding them bright in his preamp, it might be just the difference between the EAR preamp and the Cary PH301 that I used. This is why we have to make our own comparisons as every piece of gear will have it's differences. I always try to find someone who has the same piece of equipment that I have and see what they liked for tubes in theirs. Finding two exact same systems would be about impossible and why we see so many varied opinions on just what worked for each of us. Total agreement on anything is virtually impossible for many reasons. |
https://www.audiotubes.com/audtube.htm Jessie Brent Tubes closing March 5, 2026. Better look and stock up quick ... BUT great information on audio tubes, well worth the time to browse. One cannot help learning a great deal about our beloved vacuum tubes and the variants! https://www.audiotubes.com/12au7.htm https://archive.org/details/InsideTheVacuumTube Have fun!! |
