[bcowen]

Help with Tung-Sol date code, please?

322511-3

The 322 is the manufacturer code, the -3 means it was made on 3rd shift (poor slobs), but the 511? Is that the 1st week of 1951? Or the 11th week of 1955 (or '45...or '65)?

 

[TK16]

Believe 511 is the 5th century 11th year. full date code 411AD or possibly BC.

 

[bcowen]

Believe 511 is the 5th century 11th year. full date code 411AD or possibly BC.

Thanks TK! I was only off by a few millennia. Close enough for audio purposes...

 

[TK16]

Lot of 73 1968 Foton 6N3P, $50 OBO. Says new, see some bent pins.
https://www.ebay.com/itm/73x-Vintage-rare-tubes-6N3P-6Н3П-6CC42-2C51-6385-ECC42-NEW/163158464068
Anybody know how long it would take to fully test all these on a Hickok 752?

 

[ThurstonX]

Believe 511 is the 5th century 11th year. full date code 411AD or possibly BC.

LOL.

 

[bcowen]

Lot of 73 1968 Foton 6N3P, $50 OBO. Says new, see some bent pins.
https://www.ebay.com/itm/73x-Vintage-rare-tubes-6N3P-6Н3П-6CC42-2C51-6385-ECC42-NEW/163158464068
Anybody know how long it would take to fully test all these on a Hickok 752?

Allowing a 3 minute warm-up per tube and testing for shorts, gas, and Gm: 4 hours, 15 minutes, 30 seconds, give or take. I don't bother with the "life" test as a tube that's near death will show in the GM readings.

Edit: faulty math first time.

 

[Judge Buff]

Does this look like a PW? I can’t make out the first figure after the Heerlen delta, but it could be a 4 or a 1. It is claimed to be NOS (aren’t they all) but untested. I took a chance on it because of this picture. If it is a PW, I basically stole it off the bay.

 

[billerb1]

Looks like a pinched waist to me. Congrats !

 

[Judge Buff]

Help with Tung-Sol date code, please?

322511-3

The 322 is the manufacturer code, the -3 means it was made on 3rd shift (poor slobs), but the 511? Is that the 1st week of 1951? Or the 11th week of 1955 (or '45...or '65)?

1st week of 51. See the 2nd post here:
https://www.audioasylum.com/cgi/vt.mpl?f=tubes&m=238624

 

[bcowen]

Does this look like a PW? I can’t make out the first figure after the Heerlen delta, but it could be a 4 or a 1. It is claimed to be NOS (aren’t they all) but untested. I took a chance on it because of this picture. If it is a PW, I basically stole it off the bay.

Teaser. You can't make us jealous unless you let us know how much you stole it for.

 

[Judge Buff]

Looks like a pinched waist to me. Congrats !

Yea me! If it works at all in my amps, it will be worth the icy stares of the Mrs for buying (as she says) “not another ‘bulb.’”

 

[bcowen]

1st week of 51. See the 2nd post here:
https://www.audioasylum.com/cgi/vt.mpl?f=tubes&m=238624

Thanks! I suspected TK's info was a wee bit off.

 

[TK16]

Does this look like a PW? I can’t make out the first figure after the Heerlen delta, but it could be a 4 or a 1. It is claimed to be NOS (aren’t they all) but untested. I took a chance on it because of this picture. If it is a PW, I basically stole it off the bay.

Looks like an ECC88 PW congrats.

 

[Judge Buff]

Teaser. You can't make us jealous unless you let us know how much you stole it for.

$9... 12.75 shipped.

 

[bcowen]

$9... 12.75 shipped.

OK, I'm jealous. Nice score!!