The Reference 6SN7 Thread
Dec 26, 2023 at 3:35 PM Post #9,646 of 10,003
I have these same tubes. The only difference I see is my tubes have Rogers printed in green.

I bought them pre pandemic from a guy in Vancouver. I want to say they were very fairly priced. It was a bigger buy for me because I remember he sold them as a lot of 7-8 6SN7s. I don't remember having listened to them at all. I'll have to look for them and give them a listen soon. How do you like them?
Update on this - turns out the amp I was using was biasing out incorrectly on the left channel - there was a failed solder joint on a resistor which I just fixed about 2 hours ago - these 6SN7 tubes are insanely good :sweat_smile: might just be my favorite of all, even compared to the likes of Brimar_13D1 and 5692 - super glad I picked them up now.

Also, turns out when one side is not biasing out correctly, really can throw things off :joy:
 
Dec 26, 2023 at 3:49 PM Post #9,647 of 10,003
Update on this - turns out the amp I was using was biasing out incorrectly on the left channel - there was a failed solder joint on a resistor which I just fixed about 2 hours ago - these 6SN7 tubes are insanely good :sweat_smile: might just be my favorite of all, even compared to the likes of Brimar_13D1 and 5692 - super glad I picked them up now.

Also, turns out when one side is not biasing out correctly, really can throw things off :joy:
Good news on all fronts. You know how those seemingly small issues can take forever to isolate and then to diagnose. Issues such as failed solder. Although I've been slowly teaching myself how to be handy in the world of audio. Learning to solder as an example... I still have a couple of real certified amp techs who I trust. Living in Los Angeles has its benefits. With a large population of creative musicians in the city, we have access to some really outstanding amp techs. Regardless glad it all worked out for you.

Regarding the Rogers Canada 6SN7s, I look forward to pulling mine from my stash here in the next week or two and giving them a listen. It always amazes me how sometimes ones hearing and impressions can change over time. Again I've not heard these before. Just commenting on this in a general way.
 
Dec 26, 2023 at 4:28 PM Post #9,648 of 10,003
Good news on all fronts. You know how those seemingly small issues can take forever to isolate and then to diagnose. Issues such as failed solder. Although I've been slowly teaching myself how to be handy in the world of audio. Learning to solder as an example... I still have a couple of real certified amp techs who I trust. Living in Los Angeles has its benefits. With a large population of creative musicians in the city, we have access to some really outstanding amp techs. Regardless glad it all worked out for you.

Regarding the Rogers Canada 6SN7s, I look forward to pulling mine from my stash here in the next week or two and giving them a listen. It always amazes me how sometimes ones hearing and impressions can change over time. Again I've not heard these before. Just commenting on this in a general way.
Yes, definitely comes in handy at least learning the basics, specially when dealing with tube amps.

Let me know how you like them once you do, id be interested to hear your opinion on them.
 
Dec 28, 2023 at 12:51 AM Post #9,650 of 10,003
Finished the 338 page HA-300 MK2 thread. Now to conquer this 644 page behemoth. See y'all in 2024 🤘😅
 
Dec 28, 2023 at 1:38 AM Post #9,652 of 10,003
PXL_20231227_121017851.MP.jpg

PXL_20231228_063258322.MP~2.jpg

I just got in this pair of Rogers 6sn7gtb made in Canada. Great sounding tubes.

Here next to a Sylvania GTB of the same vintage 1958.
PXL_20231227_121223627.MP~2.jpg
 
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Dec 29, 2023 at 4:11 AM Post #9,653 of 10,003
OK, an early NEW YEAR present for all....:gift::gift:🥂🥂:confetti_ball::confetti_ball::fireworks::fireworks:
Try these tubes if you havent yet.

MAZDA 30L1, 30L15, 30L17, these are all dual triode tubes and use the same adapter.
These were all made by Brimar

20231228_212359.jpg


MAZDA 6L18, single triode tube. These might be made by Marconi.

20230724_080231.jpg


...n MULLARD ECL80, a Triode-Pentode tube. Run as twin on Triode section or Strapped Triode on Pentode section..
Shown here are relabeled Lorenz...look for "B" code for Mullard production as Siemens also made this.

20231130_033543.jpg


lastly, MULLARD ECH42, a Triode-Hexode tube. Again, run as twin on Triode section or Strapped Triode on Hexode section...whichever sound better to you. Again, there are Mullard, TFK, Siemens, Philips, etc....look for code to determine.

20231026_050426.jpg


Kind Reminder: Always study the datasheet and understand what you are putting onto your amp. I take no responsibility if your amp blew up.

Enjoy and have fun!!!
 
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Dec 29, 2023 at 11:30 AM Post #9,654 of 10,003
OK, an early NEW YEAR present for all....:gift::gift:🥂🥂:confetti_ball::confetti_ball::fireworks::fireworks:
Try these tubes if you havent yet.

MAZDA 30L1, 30L15, 30L17, these are all dual triode tubes and use the same adapter.
These were all made by Brimar

20231228_212359.jpg

MAZDA 6L18, single triode tube. These might be made by Marconi.

20230724_080231.jpg

...n MULLARD ECL80, a Triode-Pentode tube. Run as twin on Triode section or Strapped Triode on Pentode section..
Shown here are relabeled Lorenz...look for "B" code for Mullard production as Siemens also made this.

20231130_033543.jpg

lastly, MULLARD ECH42, a Triode-Hexode tube. Again, run as twin on Triode section or Strapped Triode on Hexode section...whichever sound better to you. Again, there are Mullard, TFK, Siemens, Philips, etc....look for code to determine.

20231026_050426.jpg

Kind Reminder: Always study the datasheet and understand what you are putting onto your amp. I take no responsibility if your amp blew up.

Enjoy and have fun!!!
Those are some great looking adapters. Are you able to switch between modes (triode, hexode) easily? Did you make them? Might want to put this in the single triode thread labeled reference 6j5.
 
Dec 29, 2023 at 11:57 AM Post #9,655 of 10,003
Those are some great looking adapters. Are you able to switch between modes (triode, hexode) easily? Did you make them? Might want to put this in the single triode thread labeled reference 6j5.
Yes, the wires are detachable internally, wires soldered to female terminal pins...and sockets are interchangeable as long as they have the same size

B8A socket
20230822_183601.jpg


Octal socket
20230815_163335.jpg


This is with the TC installed
20231113_064841.jpg
 
Dec 29, 2023 at 12:43 PM Post #9,656 of 10,003
Yes, the wires are detachable internally, wires soldered to female terminal pins...and sockets are interchangeable as long as they have the same size

B8A socket
20230822_183601.jpg

Octal socket
20230815_163335.jpg

This is with the TC installed
20231113_064841.jpg
Did you make those yourself?
 
Dec 29, 2023 at 12:47 PM Post #9,657 of 10,003
Did you make those yourself?
Yes...lots of planning, sourcing and hard work :sweat_smile:
Below are some pictures to give you an idea if you are interested in making the adapters...

These are the TC wires....I used hollow aluminum knob, internal clip from another TC and insulated the clip from the knob with Teflon heat shrinking tube.
20231005_204101.jpg

20230711_190312.jpg

20230805_174530.jpg

20230808_054719.jpg

20230713_165723.jpg

20230801_234858.jpg

20230721_185756.jpg


WARNING: ALWAYS CHECK YOUR WORK, HIGH VOLTAGE CAN KILL.
 
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Dec 29, 2023 at 3:25 PM Post #9,658 of 10,003
Yes...lots of planning, sourcing and hard work :sweat_smile:
Below are some pictures to give you an idea if you are interested in making the adapters...

These are the TC wires....I used hollow aluminum knob, internal clip from another TC and insulated the clip from the knob with Teflon heat shrinking tube.
20231005_204101.jpg
20230711_190312.jpg
20230805_174530.jpg
20230808_054719.jpg
20230713_165723.jpg
20230801_234858.jpg
20230721_185756.jpg

WARNING: ALWAYS CHECK YOUR WORK, HIGH VOLTAGE CAN KILL.
Wow, that’s a lot of work. Hope the sound was worth the effort!
 
Dec 31, 2023 at 8:08 AM Post #9,660 of 10,003
Yes...lots of planning, sourcing and hard work :sweat_smile:
Below are some pictures to give you an idea if you are interested in making the adapters...

These are the TC wires....I used hollow aluminum knob, internal clip from another TC and insulated the clip from the knob with Teflon heat shrinking tube.
20231005_204101.jpg
20230711_190312.jpg
20230805_174530.jpg
20230808_054719.jpg
20230713_165723.jpg
20230801_234858.jpg
20230721_185756.jpg

WARNING: ALWAYS CHECK YOUR WORK, HIGH VOLTAGE CAN KILL.
Beautiful work!
 

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