[mordy]

Another useful search tool I recently discovered is Google Images. Just go to Google Images and type in what you are looking for - as an example A1834 Vacuum tube.
Look at the pictures and skip the stuff you don't want - found a GEC 6AS7 tube with the Marconi name - another name to look for.
When you find a picture you are interested in, click on visit. Here is a gorgeous curved base from Hammersmith factory from Oct 1960:

I assume that the Gecovalve box isn't original for this tube, but a different GEC name again....

And on and on - sometimes you can find a selling ad that wasn't listed on the regular forums and score a deal....
https://www.google.com/search?hl=en...30j0i30j0i24.aV2bdlDLg-4#imgrc=moPlxMZk1FNscM:
Have fun!

 

[mordy]

Just watch out for them fakes - Svetlana or RCA:

 

[L0rdGwyn]

Another useful search tool I recently discovered is Google Images. Just go to Google Images and type in what you are looking for - as an example A1834 Vacuum tube.
Look at the pictures and skip the stuff you don't want - found a GEC 6AS7 tube with the Marconi name - another name to look for.
When you find a picture you are interested in, click on visit. Here is a gorgeous curved base from Hammersmith factory from Oct 1960:

I assume that the Gecovalve box isn't original for this tube, but a different GEC name again....

And on and on - sometimes you can find a selling ad that wasn't listed on the regular forums and score a deal....
https://www.google.com/search?hl=en...30j0i30j0i24.aV2bdlDLg-4#imgrc=moPlxMZk1FNscM:
Have fun!

That is one good looking tube, it can't be denied.

Thanks again, mordy, I will heed your advice, watch out for fakes and have a good time doing it.

The hunt continues...

 

[whirlwind]

For what it is worth

Excuse my intrusion, as I am not a GOTL owner as of this moment but the good patrons of this thread are the most tube-knowledgeable I have come across on Head-Fi. If you would be so kind, I would just like to know what is considered fair market price for a single GEC 6080 or GEC 6AS7G/A1834 these days, assuming I come across one. My OTL amplifier takes a single 6AS7G type in the output position, in which I currently use either a 421A or Tung Sol 7802. Much appreciated!

The GEC 6080 can be gotten cheaper than the GEC 6AS7G.
The GEC 6AS7G sounds better to my ears.

 

[L0rdGwyn]

For what it is worth



The GEC 6080 can be gotten cheaper than the GEC 6AS7G.
The GEC 6AS7G sounds better to my ears.

Thanks, Joe. I have read the same elsewhere, that they are similar in quality but the 6AS7G edges the 6080 in performance. I think I will wait for the 6AS7G, although the wait may not be long, a little birdie might have found one for me.

 

[Zachik]

How do the RCA 6AS7G compare to the GEC ones?
MUCH cheaper and easier to find...

 

[Monsterzero]

Anyone have experience with this tube,and if so what are your thoughts on sound? Im assuming these will work in the GOTL,yes?

 

[mordy]

What is the tube designation? 7643 means that they were made in the 43rd week of 1976.
BTW, it looks like the pins need a little bit of cleaning - scrape them gently with a dull blade.

 

[Monsterzero]

What is the tube designation? 7643 means that they were made in the 43rd week of 1976.
BTW, it looks like the pins need a little bit of cleaning - scrape them gently with a dull blade.

From sellers ad:

"This gorgeous pair of 5692s are 1970s relabel era (46th month of 1974) examples of probably late 1950s / early 1960s Sylvania 6SN7GTBs with black plates, ring getters and chrome tops. Test strong and balanced. Appear to be unused"

 

[gibosi]

Given that these do not have the rugged construction typical of 5692, that is, an extra top mica and 5 additional freestanding support posts, I suspect that they are simply RCA 6SN7GTB.

https://www.head-fi.org/threads/the-6sn7-identification-guide.209782/

 

[mordy]

How do the RCA 6AS7G compare to the GEC ones?
MUCH cheaper and easier to find...

The RCA 6AS7G are very warm sounding tubes. As always, the results depend very much on the synergy with other tubes and in which amp the tubes are used.

 

[mordy]

From sellers ad:

"This gorgeous pair of 5692s are 1970s relabel era (46th month of 1974) examples of probably late 1950s / early 1960s Sylvania 6SN7GTBs with black plates, ring getters and chrome tops. Test strong and balanced. Appear to be unused"

As gibosi says, no reason to think that these were relabled Sylvania tubes - just plain RCA 6SN7 tubes. I read somewhere that a commercial seller had a large quantity of the RCA 5692 with a red base and hyped them up, including jacking up the price.
This pair is only $239.00:

https://www.ebay.com/itm/Two-RCA-JA...FUAAOSw78xcjYQD:sc:USPSFirstClass!10952!US!-1

 

[Monsterzero]

Given that these do not have the rugged construction typical of 5692, that is, an extra top mica and 5 additional freestanding support posts, I suspect that they are simply RCA 6SN7GTB.

https://www.head-fi.org/threads/the-6sn7-identification-guide.209782/

As gibosi says, no reason to think that these were relabled Sylvania tubes - just plain RCA 6SN7 tubes. I read somewhere that a commercial seller had a large quantity of the RCA 5692 with a red base and hyped them up, including jacking up the price.
This pair is only $239.00:
https://www.ebay.com/itm/Two-RCA-JA...FUAAOSw78xcjYQD:sc:USPSFirstClass!10952!US!-1

Thanks for the info guys. this is why I always ask before buying tubes.
Seller is only asking 35.00 shipped for the pair,but I will pass.

 

[Zachik]

The RCA 6AS7G are very warm sounding tubes. As always, the results depend very much on the synergy with other tubes and in which amp the tubes are used.

Going to be used on GOTL. Warm sound is my personal preference, so being warm is a good thing
Will be used with HD800, Verite and Atticus (or any subset of these).

 

[Monsterzero]

Going to be used on GOTL. Warm sound is my personal preference, so being warm is a good thing
Will be used with HD800, Verite and Atticus (or any subset of these).

I would imagine they would sound good with the HD800,not so much with Atticus and Verite. I have the RCA 6AS7G and it is warmth overload to my ears on the ZMF headphones.