[L0rdGwyn]

Here are some other tubes I received today.

Beautiful NIB GEC U18/20, backup for the one being used in my 6A5 amplifier.



Have not purchased any 6J5 tubes in quite some time, but was keeping an eye out for a pair of these: Nippon Electric 6J5GT, Japanese subsidiary of Western Electric.



And a set of Hytron VT-62/801A, thoriated tungsten DHT outputs for the amplifier I am working on.

 

[chrisdrop]

Here are some other tubes I received today.

Beautiful NIB GEC U18/20, backup for the one being used in my 6A5 amplifier.



Have not purchased any 6J5 tubes in quite some time, but was keeping an eye out for a pair of these: Nippon Electric 6J5GT, Japanese subsidiary of Western Electric.



And a set of Hytron VT-62/801A, thoriated tungsten DHT outputs for the amplifier I am working on.

Nice tubes Thanks for sharing pictures.

 

[mordy]

The 801A tubes used thoriated tungsten which is said to be very minimally radioactive. What is your take on that?

 

[gimmeheadroom]

The 801A tubes used thoriated tungsten which is said to be very minimally radioactive. What is your take on that?

Lighten up, buddy

 

[L0rdGwyn]

The 801A tubes used thoriated tungsten which is said to be very minimally radioactive. What is your take on that?

Only a concern if I were to break open the tube, crush the filaments, and inhale the dust. This is not on my bucket list more likely to be killed by electrocution building the amplifier with a 700V B+. I'm sure @2359glenn can weigh in as well.

 

[Bullpride]

A Glenn OTL showed up in the Classified yesterday. Sold in less than an hour. It was in rough shape. Missed my chance

 

[leftside]

@leftside - I think yours can take 6N7* tubes in the 6J5* slots, is that right?

That's right.

The 6N7 and 6J5 have similar pinouts, but the dual sections of the 6N7 have the orientation of the plates and grids swapped from that of the 6J5. For compatibility of both tubes, the socket must be wired with the two 6N7 triodes in parallel.

6J5


6N7

I think that's what my amp does. I seem to be running 6N7G in those sockets the most these days. The smaller 6N7 Mullard, Sicte and Fivre are also very good. Don't think I have any other 6N7 to try.

 

[chrisdrop]

That's right.


I think that's what my amp does. I seem to be running 6N7G in those sockets the most these days. The smaller 6N7 Mullard, Sicte and Fivre are also very good. Don't think I have any other 6N7 to try.

Sheesh! No breaks on Fivre tubes!

 

[gibosi]

Klangfilm was founded by Siemens and AEG - parent company of Telefunken - pre-WWII. In 1941 Siemens bought out AEG, so many post WWII Klangfilm products were labelled Siemens-Klangfilm. Likely in part of their scarcity, there are no available datasheets for this particular model, they are listed as a near-equivalent to the REN904 on Radiomuseum, leading me to believe they are not internally identical, but it is possible they are the same, perhaps my ears will tell me I'm sure our tube historian, Ken, could shed more light on the relationship between Klangfilm and AEG (read Telefunken). And yes, 1930s.

The only Klangfilm tubes I look at are rectifiers. And very frankly, I'm not sure that any I have seen were actually manufactured by Klangfilm, even those manufactured in the 1930's. What causes me to doubt is they all seem to have Telefunken date codes printed on the bottom of the bases. So I just don't know...

 

[L0rdGwyn]

The only Klangfilm tubes I look at are rectifiers. And very frankly, I'm not sure that any I have seen were actually manufactured by Klangfilm, even those manufactured in the 1930's. What causes me to doubt is they all seem to have Telefunken date codes printed on the bottom of the bases. So I just don't know...

No worries! Let it be a mystery then I am happy to have them either way.

A Glenn OTL showed up in the Classified yesterday. Sold in less than an hour. It was in rough shape. Missed my chance

Sorry you missed out, it appears to be an earlier build by Glenn before the advent of the 6BX7-capable OTL. You might be happier with a current model with more tube options!

 

[Bullpride]

Sorry you missed out, it appears to be an earlier build by Glenn before the advent of the 6BX7-capable OTL. You might be happier with a current model with more tube options!

I suppose I will patiently wait at the end of the line. Good things come to those that wait

 

[whirlwind]

Here are some other tubes I received today.

Beautiful NIB GEC U18/20, backup for the one being used in my 6A5 amplifier.



Have not purchased any 6J5 tubes in quite some time, but was keeping an eye out for a pair of these: Nippon Electric 6J5GT, Japanese subsidiary of Western Electric.



And a set of Hytron VT-62/801A, thoriated tungsten DHT outputs for the amplifier I am working on.

Nice tubes. The U18/20 is a great rectifier and those output tubes look nice and sturdy!

 

[whirlwind]

A Glenn OTL showed up in the Classified yesterday. Sold in less than an hour. It was in rough shape. Missed my chance

That sold so fast I did not even know it was listed.
Amp looked to be in nice shape, just had some rust on the transformer.
Definitely an earlier build be Glenn.
Some of his earlier builds had a very small footprint that looked pretty cool.

 

[L0rdGwyn]

Nice tubes. The U18/20 is a great rectifier and those output tubes look nice and sturdy!

Thanks, Joe. Those 801A are known for being pretty rugged and long-lasting. I probably went overboard having so many backup pairs, but I couldn't pass up a good deal (or three). Looking forward to talking more about this amp soon, it's going to be a monster, hopefully a beautiful monster.

 

[JazzVinyl]

Keeping it simple tonight....the NU 12J5's and a pair of Mullard 6080's....

And a heck of a nice album that I bought without knowing what it sounded like, and was immensely pleased with it...Erich Avinger, his album "Si" from 1995:



Hope all continue to be safe...

Cheers...


~~JV~~