[JazzVinyl]

I have sextets of both the flat and T-plate Sylvania 6BL7. If people are interested, I would be happy to compare them and share some thoughts.

All of my flat plate sylvania 6BL7's tend to have noises. Several that started out quiet have become noisy on me. The T plate ones - have had very few problems. So one wonders if 6BL7 gave up on flat plates in favor of the T plate design?

 

[L0rdGwyn]

All of my flat plate sylvania 6BL7's tend to have noises. Several that started out quiet have become noisy on me. The T plate ones - have had very few problems. So one wonders if 6BL7 gave up on flat plates in favor of the T plate design?

Hmm, can't be sure! As I recall my set of six flat plates is very quiet, but I have not put many hours on them. I will move on from my 421As and put them in for at least a week and see, then perhaps compare to the T-plates.

 

[2359glenn]

I always thought the Sylvania flat plates sounded better.

 

[whirlwind]

Somebody was asking me a while back if I had any Sylvania flat plates for sale....I have found these...thought I had more but can't seem to find them.

I really can't say if they are quiet or not as I have not heard them in ages and I no longer have any adapters to use them.

 

[JazzVinyl]

I always thought the Sylvania flat plates sounded better.

Agree! But they are like your #27's - hard to find quiet ones.

 

[mordy]

Just found a new use for the packing material that Glenn uses for the amps:

 

[L0rdGwyn]

This is what I will be listening to for the next several days, a very old Mullard ECC32 and Sylvania 6BL7GT flat plates. This combination is silent, we'll see if it lasts. Before putting in the ECC32, I was rolling some 6F8G and 6SN7 I am selling through the GOTL to ensure all is working as expected. Putting in the ECC32 at the end, the soundstage completely opened up, this tube is so spacious, without a doubt my favorite dual triode.

 

[JazzVinyl]

This is what I will be listening to for the next several days, a very old Mullard ECC32 and Sylvania 6BL7GT flat plates. This combination is silent, we'll see if it lasts. Before putting in the ECC32, I was rolling some 6F8G and 6SN7 I am selling through the GOTL to ensure all is working as expected. Putting in the ECC32 at the end, the soundstage completely opened up, this tube is so spacious, without a doubt my favorite dual triode.

It's a shame the Philips ECC32 is so rare and expensive these days.

 

[L0rdGwyn]

It's a shame the Philips ECC32 is so rare and expensive these days.

Yeah it sure is, the pairs I have were bought at a discount compared to what they usually go for, I wouldn't pay the prices on see on North American eBay or from UK sellers.

 

[whirlwind]

Just found a new use for the packing material that Glenn uses for the amps:

You are a mad scientist , just like Glenn

 

[whirlwind]

TGIF, happy Friday folks!



PS > I have found that I like my RCA 6BL7 sextet better than Tung Sol 6BL7 tubes. Time to roll Sylvania 6BL7s next week to try another flavour

Really like this pic of the insides of the ECC32

 

[Zachik]

You are a mad scientist , just like Glenn

Mad scientist with a developed sense of fashion

 

[leftside]

Some people have asked of my thoughts regarding GEC/Osram B36 metal base vs GEC L63 metal base. Here you go:
https://www.head-fi.org/threads/1101-audio-custom-crafted-headphone-amps.919425/page-3#post-15322885

 

[chrisdrop]

Adapter question. Perhaps one for you @Deyan or probably others know:

Referencing @Zachik handy-dandy spreadsheet: I (as of this week) have a "Dual 6J5 to 6SN7 adapter". For a 12J5 it lists a "Dual 12J5 to 12SN7 adapter". Given that my amp has a handy 6/12/25v switch, will it work, allowing a 12J5s in the same adapter?

 

[Deyan]

Adapter question. Perhaps one for you @Deyan or probably others know:

Referencing @Zachik handy-dandy spreadsheet: I (as of this week) have a "Dual 6J5 to 6SN7 adapter". For a 12J5 it lists a "Dual 12J5 to 12SN7 adapter". Given that my amp has a handy 6/12/25v switch, will it work, allowing a 12J5s in the same adapter?

Yes it will.