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For 6AS7G tube rollers here .....
May 17, 2021 at 10:05 PM Post #7,666 of 9,583
May 18, 2021 at 1:48 AM Post #7,667 of 9,583
May 18, 2021 at 9:39 PM Post #7,668 of 9,583
tubebuyer2020 said:
Where is that mountain, sir?
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tubebuyer2020 said:
To be honest original post was from 2017, so maybe I was not entirely fair here. I presume some of the amp manufacturers stocked up on these heavily.
Isn't it a bit interesting that even Shuguang ones are not exactly cheap as you would have expected?

When it comes to Russian ones do you look for specific years like with Fotons or any 6N13/6N5 is sort of OK?
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Indeed, while they are still quite widely available, seems the price has increased quite a bit in the last 4 years, to around $15/tube.

https://www.ebay.com/itm/273312455235?hash=item3fa2b11a43:g:JC0AAOSwgZ5cW~fG
 
May 19, 2021 at 2:06 PM Post #7,669 of 9,583
I had a couple of my favorite power tubes get noisy and found the culprit to be one of my driver tubes. Is this a common occurrence with tube amps? I spent a lot of time switching out power tubes only to find it was the drivers... :slight_frown:
 
May 19, 2021 at 2:10 PM Post #7,670 of 9,583
CADCAM said:
I had a couple of my favorite power tubes get noisy and found the culprit to be one of my driver tubes. Is this a common occurrence with tube amps? I spent a lot of time switching out power tubes only to find it was the drivers... :slight_frown:
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It can be very hard to track down noise issues in a tube amp. And be very happy you don't have a tube rectifier. :)
 
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May 19, 2021 at 6:55 PM Post #7,672 of 9,583
UntilThen said:
Fortunately all my tubes are quiet. The ones that are noisy I send to Bcowen.
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And I then resolder the pins and they are quiet as a church mouse. I have a growing collection of really expensive tubes that were free, which is why I don't complain too much about the $1.50/hr you pay me to drive your cart or decide which putter to hand you at the tee. :laughing:
 
May 19, 2021 at 11:10 PM Post #7,673 of 9,583
Hi, I am a newbie to this forum but have been using tube equipment for over 40 years. I have a question about using a 2x 6BL7 to 6AS7G adapter from China. Recently I bought the following tube headphone DAC/amplifier: XZ-Audio U202 Home Audio Tube Headphone Amplifier/Pre-amplifier Input USB/AUX/RCA DAC Audio Decoder.

The amplifier uses 2 driver tubes and a single 6N5P (6AS7 type) tube in the output stage, as a cathode follower I believe. So the right channel uses 1/2 of the 6N5P tube and the left channel uses 1/2 of the 6N5P tube. I wanted to use 2 of the 6BL7 tubes to replace the single 6N5P tube. Can I use the 6BL7 to 6AS7 tube converter adapter for this purpose? The amplifier manufacturer said it would handle the increased heater current demand.

Does anyone know whether it is possible to use this adapter in my particular headphone amp? I saw an old post on the 6BL7 forum that it may not be possible to use the adapter but it is OK to use a single 6BL7 in the 6AS7G tube socket.

Thank you for all the great info on this forum.

Roger
 
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May 20, 2021 at 3:18 AM Post #7,674 of 9,583
For WA22 and Feliks Audio Elise and Eudora, I have used 2 x 6BL7 with adapters in both the power tubes slot.

It’s a great tone.

I believe you can do that on your amp but do so at your own calculated risk.
 
May 20, 2021 at 7:46 AM Post #7,675 of 9,583
rlawry said:
Hi, I am a newbie to this forum but have been using tube equipment for over 40 years. I have a question about using a 2x 6BL7 to 6AS7G adapter from China. Recently I bought the following tube headphone DAC/amplifier: XZ-Audio U202 Home Audio Tube Headphone Amplifier/Pre-amplifier Input USB/AUX/RCA DAC Audio Decoder.

The amplifier uses 2 driver tubes and a single 6N5P (6AS7 type) tube in the output stage, as a cathode follower I believe. So the right channel uses 1/2 of the 6N5P tube and the left channel uses 1/2 of the 6N5P tube. I wanted to use 2 of the 6BL7 tubes to replace the single 6N5P tube. Can I use the 6BL7 to 6AS7 tube converter adapter for this purpose? The amplifier manufacturer said it would handle the increased heater current demand.

Does anyone know whether it is possible to use this adapter in my particular headphone amp? I saw an old post on the 6BL7 forum that it may not be possible to use the adapter but it is OK to use a single 6BL7 in the 6AS7G tube socket.

Thank you for all the great info on this forum.

Roger
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I agree with @UntilThen, as long as the manufacturer said that the amp would handle the heater current demand from the 6BL7, then, in theory, it should work, but there's always the risk involved. You can try with a single tube, and if that works, then most probably a dual configuration should work too.

Looking at some photos of the amp, it looks like the adapter would be sitting very close to the driver tubes :ksc75smile: hopefully the size of the adapter won't be a problem
 
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May 20, 2021 at 8:34 AM Post #7,677 of 9,583
For the best 6BL7 or 6BX7 experience, you need to get the Glenn OTL amp that can use up to 6 x 6BL7 tubes. I had so much fun and enjoyment with this amp for close to 2 years. You have to listen to this setup to know what sextet 6BX7 or 6BL7 can do. I still miss it to this day.

DSC_0020.JPG
 
May 20, 2021 at 1:36 PM Post #7,678 of 9,583
UntilThen said:
For the best 6BL7 or 6BX7 experience, you need to get the Glenn OTL amp that can use up to 6 x 6BL7 tubes. I had so much fun and enjoyment with this amp for close to 2 years. You have to listen to this setup to know what sextet 6BX7 or 6BL7 can do. I still miss it to this day.

DSC_0020.JPG
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This is a beautiful amp.

Your current amps all sound like books in a fantasy book series or video games:

Assassins Creed Odyssey
Destiny
Elder Scrolls IV - Oblivion

Who makes these fabled amps?
 
May 20, 2021 at 2:03 PM Post #7,679 of 9,583
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