The Reference 6SN7 Thread
Jul 16, 2022 at 6:10 PM Post #7,336 of 7,805

TLO

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Pick your poison, they are all great!!!:smiling_imp:

Mullard CV6
PSX_20220717_012633.jpg


Marconi CV1052/VT52/EL32
PSX_20220716_224132.jpg


Mullard CV1052/VT52/EL32 (Straight Bottle)
PSX_20220716_224332.jpg


Mullard CV1052/VT52/EL32 (ST)
PSX_20220714_235709.jpg


Great SQ @ cheap price...:thumbsup:
 
Jul 16, 2022 at 6:13 PM Post #7,337 of 7,805

Odin412

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Jul 16, 2022 at 6:44 PM Post #7,339 of 7,805

TLO

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Wait, are you using 2x triode wired el32 in place of a 6sn7? That's crazy. What kind of current draw does that have? Who thought of this?
I believe you have mistaken for another tube. EL32 consumes only 0.2 amp per tube, 0.4 amp per pair compared to 0.6 amp for a single 6SN7.
As I have reminded, always check datasheet when rolling tubes...:metal:
 
Jul 16, 2022 at 6:49 PM Post #7,340 of 7,805

Isaacc7

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I believe you have mistaken for another tube. EL32 consumes only 0.2 amp per tube, 0.4 amp per pair compared to 0.6 amp for a single 6SN7.
As I have reminded, always check datasheet when rolling tubes...:metal:
Well that is good to know. The fact remains that is mental! My head has been spinning with triode alternatives, didn't realize people were using triode wired pentodes as well. So how do they compare to 6j5 or 6sn7?
 
Jul 16, 2022 at 6:56 PM Post #7,341 of 7,805

TLO

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Well that is good to know. The fact remains that is mental! My head has been spinning with triode alternatives, didn't realize people were using triode wired pentodes as well. So how do they compare to 6j5 or 6sn7?
It is a very common tactic called strapped triode. Search in forum for details.
I would just say I would go this route over 6J5 or 6SN7 anytime. 6J5 and 6SN7 are over-hyped and overpriced.
 
Jul 16, 2022 at 7:04 PM Post #7,342 of 7,805

Isaacc7

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It is a very common tactic called strapped triode. Search in forum for details.
I would just say I would go this route over 6J5 or 6SN7 anytime. 6J5 and 6SN7 are over-hyped and overpriced.
I'm very familiar with the concept for output tubes I just have never seen it done for twin triodes before. I'm also not familiar with using what is usually used as an output tube being use for input duties. I was considering using some as outputs on my upcoming amp.

Overhyped they may be, but my preamp can only use exact analogs of the 6sn7. So I use them, 6j5, 7n7, and 6f8g plus the 12v versions when available. My amp uses a twin triode as an input tube but it is much too cramped to be able to use two tubes instead. I've branched out to 6sl7, ecc31, and cv1102 though to great effect.
 
Jul 16, 2022 at 7:06 PM Post #7,343 of 7,805

TLO

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In case anyone is interested, have been listening to this setup for the whole day today. A pair of TFK EC88 on 6SL7 and a pair of Brimar ECC804 on 6SN7 for both channels.. Another amazing sound setup at cheap price. Highly recommended!!! Still waiting for Mullard EC88 and Philips E88C for comparison.

PSX_20220716_223018.jpg
 
Jul 16, 2022 at 7:11 PM Post #7,344 of 7,805

TLO

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I'm very familiar with the concept for output tubes I just have never seen it done for twin triodes before. I'm also not familiar with using what is usually used as an output tube being use for input duties. I was considering using some as outputs on my upcoming amp.

Overhyped they may be, but my preamp can only use exact analogs of the 6sn7. So I use them, 6j5, 7n7, and 6f8g plus the 12v versions when available. My amp uses a twin triode as an input tube but it is much too cramped to be able to use two tubes instead. I've branched out to 6sl7, ecc31, and cv1102 though to great effect.
Yes, I feel your pain. You can see I have gone crazy when I discovered my amp actually has the space...LOL. Have been hesitated for almost a year before I jumped on using twin triode as I thought the dual adapter doesnt fit.

PSX_20220708_173437.jpg


It is really close...phew!!!
 
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Jul 16, 2022 at 7:14 PM Post #7,345 of 7,805

jbua5150

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Jul 17, 2022 at 2:13 PM Post #7,346 of 7,805

LoryWiv

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It is a very common tactic called strapped triode. Search in forum for details.
I would just say I would go this route over 6J5 or 6SN7 anytime. 6J5 and 6SN7 are over-hyped and overpriced.
Using triode strapped pentodes is very common with Feliks-Audio's amps, Elise / Euforia. Those forums are replete with examples. I just upgraded Elise to Euforia AE and here's my current (pun intended) roll, sounds excellent:
Marconi KT63 & GEC KT88 in Euforia AE (7-16-22).jpg
Marconi KT63 & GEC KT88. Adapters made by fellow head-fi'er @Deyan.
 
Jul 17, 2022 at 2:42 PM Post #7,347 of 7,805

TLO

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Using triode strapped pentodes is very common with Feliks-Audio's amps, Elise / Euforia. Those forums are replete with examples. I just upgraded Elise to Euforia AE and here's my current (pun intended) roll, sounds excellent:

Marconi KT63 & GEC KT88. Adapters made by fellow head-fi'er @Deyan.
:clap::clap: great!!! Oh yes, KT63 is equal to 6F6...have checked this before. Too scary for me, 1.4 amp heater current for twin triodes... :sweat_smile:
The highest I have gone is 1.25 amp on twin triodes.
 
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Jul 17, 2022 at 4:39 PM Post #7,348 of 7,805

steve468

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I have a favour to ask of the technical tube heads here: I have a Melz with a pin that has come loose from the base. I resoldered the pin so that it was at least well connected to the underlying wire, but I wasn’t able to re-attach it to the base. It’s still a bit wobbly. I’m not even entirely sure how the pins are attached to the base. Is something like superglue a viable option in this case? Any other options you beautiful people can think of? Thanks!
 
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Jul 18, 2022 at 2:50 AM Post #7,349 of 7,805

LoryWiv

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:clap::clap: great!!! Oh yes, KT63 is equal to 6F6...have checked this before. Too scary for me, 1.4 amp heater current for twin triodes... :sweat_smile:
The highest I have gone is 1.25 amp on twin triodes.
At least in my amp. it's the total heater current of all 4 tubes, drivers and powers, that must stay under a certain value. The tube set I pictured totals 4.6A, quite a bit less than the stock tube set in Euforia which is 6.2A using 6SN7 and 6AS7G. I do understand it can be nervous-making but the rewards are great and can be done safely especially if you study up first, and follow in the footsteps of other head-fi'ers.
 
Jul 18, 2022 at 4:58 AM Post #7,350 of 7,805

Ranger Ron

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I have a favour to ask of the technical tube heads here: I have a Melz with a pin that has come loose from the base. I resoldered the pin so that it was at least well connected to the underlying wire, but I wasn’t able to re-attach it to the base. It’s still a bit wobbly. I’m not even entirely sure how the pins are attached to the base. Is something like superglue unable option in this case? Any other options you beautiful people can think of? Thanks!
Maybe some sort of JB Weld type, you could create a pool of it at the base and pin.
 

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