So how do you think these 6L6's will work in a Mark or IV?

[psychodave]

On a whim I bid and won these 6L6's. I wonder if they will be okay in my Mark III or IV...
:?:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320179546451

 

[phyrexia]

I'll give you $70 for them right now.

Nice score. They should work fine.

 

[AdmiralB]

Those are Sylvanias, rebranded RCA. They're the same as the STR387 (415, in Mesa nomenclature).

They can work great, if they bias correctly - which is not a high probability.

 

[psychodave]

Those are Sylvanias, rebranded RCA. They're the same as the STR387 (415, in Mesa nomenclature).

They can work great, if they bias correctly - which is not a high probability.

I know that they are Sylvainas 8) Which, to me, is just as good as the RCAs. I poped them in my MArk IV and they worked fine with no problems and sounded good, but I was curious what Mesa is looking for in bias when you buy tubes from them stock. I may just mod my III and IV to have adjustable bias. It is not that hard to do and will allow me to dial in any tubes :wink:

 

[JOEY B.]

I just looked at my notes. The STR-415's read about 26mA in the inner positions on my C+. I also have some Philips 7581A's that read about 28mA in this same amp. If they'e anywhere near 25-30mA, I say go for it w/o an adjustable bias. 8)