What does the acronym "AMW" stand for?

haon8 · 22nd June 2010, 04:06 PM

Hi all, I've had a tube amp for almost a year now and am using crappy stock Groove Tubes, so I've recently been going around buying up some NOS tubes.

I was on Ebay, and found the following auction:

RCA 5963 / 12AU7A / 12AU7 / ECC82,NOS Tube, NIB! - eBay (item 170488525229 end time Jun-21-10 17:03:31 PDT)

And promptly bought up all 5 of the tubes that were being sold. The guy confirmed that they were all manufactured in the USA. The one in the picture has "USA" stamped in red ink and black ink at different areas, while the rest of the tubes in the lot say only "RCA," "5963," and "AMW" in red ink, and "USA" in black ink. I was at first nervous that these 4 might have been manufactured in a different country and then rebranded USA, but I think they were all still made in the USA.

However, my main question is what the acronym "AMW" means. I've googled it, but have found nothing that corresponds to vacuum tubes.

Thanks!

mctavish · 23rd June 2010, 03:04 AM

Probably the date code.

Mickatroids · 17th August 2011, 01:09 PM

Possibly AMW relates to the brand shown on the valve amp here Lenard Audio, About, Jun 10

22nd June 2010, 04:06 PM	#1
haon8 diyAudio Member Join Date: Jun 2010	What does the acronym "AMW" stand for? Hi all, I've had a tube amp for almost a year now and am using crappy stock Groove Tubes, so I've recently been going around buying up some NOS tubes. I was on Ebay, and found the following auction: RCA 5963 / 12AU7A / 12AU7 / ECC82,NOS Tube, NIB! - eBay (item 170488525229 end time Jun-21-10 17:03:31 PDT) And promptly bought up all 5 of the tubes that were being sold. The guy confirmed that they were all manufactured in the USA. The one in the picture has "USA" stamped in red ink and black ink at different areas, while the rest of the tubes in the lot say only "RCA," "5963," and "AMW" in red ink, and "USA" in black ink. I was at first nervous that these 4 might have been manufactured in a different country and then rebranded USA, but I think they were all still made in the USA. However, my main question is what the acronym "AMW" means. I've googled it, but have found nothing that corresponds to vacuum tubes. Thanks!

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23rd June 2010, 03:04 AM	#2
mctavish diyAudio Member Join Date: Feb 2008 Location: Niederösterreich	Probably the date code.

17th August 2011, 01:09 PM	#3
Mickatroids diyAudio Member Join Date: Jun 2011	Possibly AMW relates to the brand shown on the valve amp here Lenard Audio, About, Jun 10

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