rca black plates 1951

[chefg1]

I bought some rca 12ax7 black plates year 1951, boy these are very good sounding . They test as new man it's like hearing my amp for the 1st time. I am going t look for some more of these.

 

[dsndblm]

Some of the best I think. I use them as driver tubes in my Fisher X-101-B. They are smooth as silk.

 

[MeatInStereo]

I just got some too with gold pins... they are not in yet....cant wait for them to come and roll them in the StingRay....they are going to go head to head with some Mullards.

 

[ssmith3046]

I have a few pair of RCA 1957 12ax7 black plates and I agree with you. They are a fine sounding tube.

 

[chinacave]

I would love to see some close-up pictures of black plates vs. (?)Grey plates.

I cannot (or have not yet noticed) a visual difference.

 

[audiodon]

Once you've seen them, you can tell. In some, it seems to be a coating. In others, the plates are definitely black. I've added a picture of a pair off the internet. These are not mine, but they are triple mica RCA black plates.