Has anyone tried subbing a 6P3S for a 6L6? And how did it go?
Hi Tony, I notice you didn't get any replies, probably because nobody has tried that substitution! I wasn't familiar with the 6P3S so I searched for a datasheet and from that decided that it was likely borderline too lightweight for use as a replacement. I then looked on one of the guitar amp forums which confirmed that but apparently there is a 6P3SE which is more robust and OK as a 6L6 substitute - bearing in mind of course that the 6L6s used in 50s' amps are more robust versions of the very original 6L6. Norman. ------ Original Message ------ From: jukebox-list@lists.netlojix.com To: jukebox-list@lists.netlojix.com Cc: tonysjukeboxrepair@gmail.com Sent: Tuesday, July 21st 2026, 18:58 Subject: [Jukebox-list] 6L6 - 6P3S Has anyone tried subbing a 6P3S for a 6L6? And how did it go? _______________________________________________ Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
I concur, I always get confused as to which one is the more robust of the two but if it’s the -e version then (by my own research) it should work well in an amplifier designed for 6L6 and maybe in a 6L6GB application. There are those guitar players that use them in a 6L6GC circuit but I’m not convinced they will handle it well. Mauro
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On Jul 24, 2026, at 12:39 PM, NORMAN MACRAE via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Hi Tony, I notice you didn't get any replies, probably because nobody has tried that substitution! I wasn't familiar with the 6P3S so I searched for a datasheet and from that decided that it was likely borderline too lightweight for use as a replacement. I then looked on one of the guitar amp forums which confirmed that but apparently there is a 6P3SE which is more robust and OK as a 6L6 substitute - bearing in mind of course that the 6L6s used in 50s' amps are more robust versions of the very original 6L6.
Norman. ------ Original Message ------ From: jukebox-list@lists.netlojix.com To: jukebox-list@lists.netlojix.com Cc: tonysjukeboxrepair@gmail.com Sent: Tuesday, July 21st 2026, 18:58 Subject: [Jukebox-list] 6L6 - 6P3S Has anyone tried subbing a 6P3S for a 6L6? And how did it go? _______________________________________________ Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/ _______________________________________________ Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
Thanks guys. I've read that the bias should be changed when doing the swap, and I'm not going to do that for every one I use. (I was looking at a large quantity)
Tony
On 7/24/2026 2:05 PM, M De Simone via Jukebox-list wrote:
I concur, I always get confused as to which one is the more robust of the two but if it’s the -e version then (by my own research) it should work well in an amplifier designed for 6L6 and maybe in a 6L6GB application. There are those guitar players that use them in a 6L6GC circuit but I’m not convinced they will handle it well. Mauro
Sent from my iPhone
On Jul 24, 2026, at 12:39 PM, NORMAN MACRAE via Jukebox-listjukebox-list@lists.netlojix.com wrote:
Hi Tony, I notice you didn't get any replies, probably because nobody has tried that substitution! I wasn't familiar with the 6P3S so I searched for a datasheet and from that decided that it was likely borderline too lightweight for use as a replacement. I then looked on one of the guitar amp forums which confirmed that but apparently there is a 6P3SE which is more robust and OK as a 6L6 substitute - bearing in mind of course that the 6L6s used in 50s' amps are more robust versions of the very original 6L6.
Norman. ------ Original Message ------ From:jukebox-list@lists.netlojix.com To:jukebox-list@lists.netlojix.com Cc:tonysjukeboxrepair@gmail.com Sent: Tuesday, July 21st 2026, 18:58 Subject: [Jukebox-list] 6L6 - 6P3S Has anyone tried subbing a 6P3S for a 6L6? And how did it go? _______________________________________________ Jukebox-list mailing list --jukebox-list@lists.netlojix.com To unsubscribe send an email tojukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives:http://jukebox.markmail.org/ _______________________________________________ Jukebox-list mailing list --jukebox-list@lists.netlojix.com To unsubscribe send an email tojukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives:http://jukebox.markmail.org/
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M De Simone -
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Tony Miklos