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PostPosted: Sun Feb 11, 2018 8:36 pm 
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Bottle Rocket

Joined: Sun Feb 11, 2018 8:22 pm
Posts: 1
Is there any suggestion of the substitutes of Mesa STR-415 & 416 tubes?
By google we know they are Sylvania 6L6 STR and EL34/6CA7. But the NOS tubes are really rare and expensive.
If there are other tubes can replace them and easy to be found.


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PostPosted: Mon Feb 12, 2018 11:55 am 
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Mark III

Joined: Sun Aug 21, 2016 5:23 pm
Posts: 187
Location: Hardwood Heaven
A lot of people have liked the SED Winged "C" tubes, especially the EL34s. At some point these were sold by Mesa as the STR-442 EL34 and STR-454 6L6. Now you can get them from various tube stores online. It looks like that factory is done making tubes though, so these are also going to get harder and harder to find as well. I am not sure either of these tubes have the same robustness or power handling of the Sylvanias, but people do really like the sound.

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PostPosted: Mon Feb 12, 2018 11:34 pm 
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Mark III

Joined: Sun Mar 06, 2016 10:38 am
Posts: 212
Location: Western Colorado
When I asked Mike B. for my 105 PT he recommended the TAD 6L6GC-STR as one that can take the voltage. If you read up on it it's loosely designed after the old 415.
http://www.thetubestore.com/Tubes/6L6-5881-Tube-Types/TAD-6L6GC-STR

He didn't think that an EL34 would have reliability problems in general, but reading it does look like the EH is a current copy of the 416. I might give them a try.
http://www.thetubestore.com/Tubes/EL34-6CA7-Tube-Types/Electro-Harmonix-6CA7EH


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PostPosted: Wed Feb 14, 2018 4:16 am 
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Mark II

Joined: Fri Jul 28, 2006 5:58 pm
Posts: 92
Location: Europe
GJgo wrote:
When I asked Mike B. for my 105 PT he recommended the TAD 6L6GC-STR as one that can take the voltage. If you read up on it it's loosely designed after the old 415.


I used those when I retubed my Mk III a few weeks ago. Too early to comment on the reliability but no problems so far.

Cheers Stephan


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