12AU7 Tubes GE and Westinghouse

kevhed72

Pair of 1951 Westinghouse Charcoal Plates 50.00 shipped
(I am pretty such this info is correct)


3 RCA BP D Getter
60.00 shipped

[img]https://us.v-cdn.net/5021930/uploads/editor/lj/xi83y g1g7czk.jpeg[/img]
3 Tube Dampers
Free to 1st customer
100.00 for everything shipped
If my prices are off, please PM me...

kevhed72

Here is another pic of the RCAs:

pitdogg2

The first pair do not appear to be Westinghouse. 1951 Westinghouse had the ladder plates and a horseshoe type on a stick. Those plates were more likely to be in GE, Sylvania or RCA. The plate clamps on top of the mica is also indicative of those 3 as well.

kevhed72

After taking another look at the boxes, I believe these are all RCA tubes.
Lets do 25.00 per tubes or 100.00 for all 5 shipped.

heiney9

What designation are the first tubes?

Ivan beat me to it. The plate "clips" on the mica rods mean it's an early American tube. The only way it could be Westinghouse is if it's a rebranded tube from most likely General Electric. Around 1951 Westinghouse was still manufacturing its own tubes. Looks like an early-mid 50's 5814's which is an equivalent of the 12AU7. I am basing that on the title of the thread. The GE 5751 looks very similar.

Excellent sounding tube for sure.

H9

dromunds

Wouldn’t the ones labeled 5751 on the tube(s)/boxes be a 12AX7 equivalent?

pitdogg2

dromunds wrote: »

Wouldn’t the ones labeled 5751 on the tube(s)/boxes be a 12AX7 equivalent?

Yes.

heiney9

dromunds wrote: »

Wouldn’t the ones labeled 5751 on the tube(s)/boxes be a 12AX7 equivalent?

I was talking about the first photo, nothing on the tube nor in the description of the photo. Yet the heading states 12AU7 tubes, yet there is a photo of a 5751 in the next set of photo's along with the unmarked one.

It's confusing are they all 5751's? Is the one not marked a 5814/12AU7? I know the heading or title of the thread can't be edited by the user, so I was just trying to ask the right question to make the sale easier. They are really nice sounding tubes for not a lot of money (once we determine what they are....lol)

That's why I asked.

kevhed72

Now I am confused...I will look at them again this weekend and post some more pics.

kevhed72

Ok the pair are labelled as 5751s (which are the same as 12au7?)and the previous owner labelled them with 1300/1450:

The boxes on the pair are labelled as Hytron GE 5751.
The set of 3 are labelled as 5751 RCA BP-D. Tubes themselves have 5751 stamped on them also:

heiney9

kevhed72 wrote: »

Now I am confused...I will look at them again this weekend and post some more pics.

My intention was not to confuse...lol. Your thread title states 12AU7 Westinghouse and GE. Yet almost all the photo's are for RCA 5751's. Of course I'm sure you added those to the sale thread which is fine, but confusing.

The first photo while it most likely is GE (not Westinghouse) is not a 12AU7 per se. It's either a 5814 which is a 12AU7 variant (and a good one) or it's a GE 5751.

None of your photo's have a designation identifier other than what we can somewhat make out on the tube or in the background boxes.

That's why it's confusing................to me atleast. I was trying to help with the sale by having the items better described.

H9

EDIT: I see you made some corrections. Just to be 100% clear 5751 and 12AU7 aren't the same. 5751 is similar to 12AX7. 5814 is similar to 12AU7

pitdogg2

Hytron tube manufacturing was bought by CBS. Early CBS tubes were labeled Hytron-CBS. Then labeled CBS only. In the middle 50's GE bought CBS, GE never made Hytron tubes by then it was all CBS only, Hytron was long out of business when the 5814 (12au7) and 5751 (12ax7) came along.

Probably best to have a mod trash this thread or modify the title to correctly reflect the proper tubes and manufacturer

kevhed72

heiney9 wrote: »

kevhed72 wrote: »

Now I am confused...I will look at them again this weekend and post some more pics.

My intention was not to confuse...lol. Your thread title states 12AU7 Westinghouse and GE. Yet almost all the photo's are for RCA 5751's. Of course I'm sure you added those to the sale thread which is fine, but confusing.

The first photo while it most likely is GE (not Westinghouse) is not a 12AU7 per se. It's either a 5814 which is a 12AU7 variant (and a good one) or it's a GE 5751.

None of your photo's have a designation identifier other than what we can somewhat make out on the tube or in the background boxes.

That's why it's confusing................to me atleast. I was trying to help with the sale by having the items better described.

H9

EDIT: I see you made some corrections. Just to be 100% clear 5751 and 12AU7 aren't the same. 5751 is similar to 12AX7. 5814 is similar to 12AU7

No worries...I should have kept better track of what was what as far as these go. I had a cheat sheet of tube types on hand but that was wrong. I am do for an eye exam soon lol.