Based on member demand, The Gear Page is pleased to announce that our Apparel Merch Shop is now open. The shop’s link is in the blue Navigation bar (on the right side), “Shop,” with t-shirts, hats, neck buffs, and stickers to start. Here’s the direct link: www.thegearpageshop.com
You’ll find exclusive high-quality apparel and merchandise; all items are ethical, sustainably produced, and we will be continuously sourcing and adding new choices.
We can ship internationally. All shipping is at cost.
You need to find the image link and then paste in post it will already have the image tags.I have pics on photobucket. I tried the image thing, put the url stuff in there...to no avail. Beats me. The tube only says 7025 and above that in small lettering says U.S.A.
I'll try again to post pics.
Yes...bring up the pic in photobucket.You need to find the image link and then paste in post it will already have the image tags.
Or just post a direct link to you photobucket
I say no way. I've never seen a 1950's short-plate RCA 12AX7. The earliest I've seen for them is 1961.From that photo, appears to be RCA 7025 made at their Cincinnati factory 1958-60. Probably closer to '60 because I think they didn't have "USA" on the earliest ones. Nice tube, IMO.
Jeff, Hudson R. and I both urge you to write a book....PLEASE!On the etched octagon, if there's a little tab (I think RCA called them "nibs" in their standardizing notice) protruding on the lower right corner (like under the "5" in 7025), that indicates Cincinnati factory manufacture. Better look again on the one above, though, I might just have seen what I was expecting to see! I think all the early RCA-made 7025s were Cincinnati. There were other factory designators; if the tab is in the lower left corner, or the top right corner, for example, both of those designate specific factories in the giant Harrison, NJ plant complex. The early '70s 7025 shown near the top of the thread likely will show one of those. RCA Cincinnati factory shut down production of these in very early '60s, IIRC, ca. 1962. Harrison lasted until mid 1976.
The short-lived long blackplate RCA 7025s were distinctive; they apparently came well after bp RCA 12AX7s had stopped, and I've never seen one labelled as "12AX7". The ones I have or have seen are usually dated ca. 1960 or '61. The bottom mica is straight sided, but the top is a "sandwich" of a straight sided mica under a fully round one, so looks round (with teeth) from the top. They have rectangular getter arrangement, not halo. I'll look to see if there's a handy photo online, but if not I can shoot one. I'm looking at one here and it has the Cincinnati tab on the octagon.
Hard to date the short grey plate RCA 7025s across the early '60s thru mid '70s if they don't have markings, but I've seen a few early ones with D getters instead of halos.