[Ripper2860]

My WE-421A only has an 052 code. Any idea what mfg year that translates to?

 

[attmci]

My WE-421A only has an 052 code. Any idea what mfg year that translates to?

Picture pls.

 

[JKDJedi]

My WE-421A only has an 052 code. Any idea what mfg year that translates to?

D or O getters?

 

[JKDJedi]

1971 421A

71 had the D getters.. interesting. my 76 has the O.

 

[Ripper2860]

Appears to be a single D or Rectangle getter...

 

[JKDJedi]

Appears to be a single D or Rectangle getter...

because of the 52...my guess is 1960 (50?)

 

[Pimmsley]

Something of a magic sonic pairing here, best of both worlds with solid state clarity and yet silky top end and a huge tubey sounding bottom end with Beyer DT1990 ..
1962 Westinghouse triple mica 12au7 (5814A) and a soviet 1962 Svetlana 6N13S

 

[mayurs]

Does this Mullard 6as7ga look legit? I have only seen mullards 6080

 

[bcowen]

Edit: If this is what you're looking at:

https://www.ebay.com/itm/MULLARD-421A-TUBE-NOS/254831897786?hash=item3b552a2cba:g:L3MAAOSwOrNf~GTK

be aware that the seller is stating that the test number of 6250 is "new." On a KS15750 tester, 6250 is MINIMUM, not new. So with GM readings of 7800 and 7750 that tube is *very* used, and not even close to NOS which would give GM readings closer to 13,000. I'd steer very clear of that seller as he is either clueless about his tester or is just being dishonest.

LOL! Seems he's relisted it with some 'edited' text on the test data.

https://www.ebay.com/itm/MULLARD-421A-TUBE-NOS/254838057507?hash=item3b55882a23:g:L3MAAOSwOrNf~GTK

 

[UntilThen]

Something of a magic sonic pairing here, best of both worlds with solid state clarity and yet silky top end and a huge tubey sounding bottom end with Beyer DT1990 ..
1962 Westinghouse triple mica 12au7 (5814A) and a soviet 1962 Svetlana 6N13S

Ah the Svetlana 6n13s. Still have 6 of them.

 

[bcowen]

Does this Mullard 6as7ga look legit? I have only seen mullards 6080

I've never seen a Mullard 6AS7GA, but that doesn't mean they didn't make one. Not a lot of detail I'm able to gather from the photo you posted, but from what I can see there are a lot of similarities with a plain-Jane RCA 6080:

 

[gibosi]

My WE-421A only has an 052 code. Any idea what mfg year that translates to?

My guess is 1950, week 52. I think by 1960, WE was using a four digit code, so 6052.

 

[gibosi]

Does this Mullard 6as7ga look legit? I have only seen mullards 6080

Mullard never made the 6AS7GA. And no other Philips subsidiary made this tube. So it is very likely an older Mullard 6080. It would seem that a customer asked Mullard to provide some 6AS7GA. And being eager to please, Mullard simply labeled their 6080 as a 6AS7GA and shipped it out. lol

It's a shame that the picture isn't better. If so, we might be able to make out the Mullard production code. And the older Mullard 6080s, pictured below to the left, resemble the RCA to some degree. The newer Mullard, more commonly seen, is to the right.

 

[JKDJedi]

 

[UntilThen]

The E on the top row has G and C missing on either side.