On Sat, 17 May 2008 08:21:03 -0400, wb <archangele66@[EMAIL PROTECTED]
> wrote:
>Maj6th wrote:
>> I need tube advice, what tubes can replace a 6L6 without being biased
in a
>> guitar amplifier, and what is the sound difference?. Is there a good
source
>> to find out this information?
>>
>> Maj6th
>>
>>
>Hi,
> The closest relative to the 6L6 is the KT66. It can be swapped in but
>it's filament draws more current. Most amps will probably have no issue
>with this, but it would be good to find out if your power transformer
>can handle at least an extra .6 amp on it's 6.3 volt winding.
>The EL34 will work as long as pins 1 and 8 are connected together on the
>tube sockets.
The EL34 requires more extensive socket modification and *must* be
rebiased.
http://www.schematicheaven.com/mods/6l6toel34mod.htm
> But again, the EL34 draws a LOT more filament current then
>a 6L6. You can NOT substitute the 6V6. It is incapable of handling the
>plate voltages of the 6L6 and also requires almost double the plate
>impedance for it's output transformer.
> Original KT66's from Europe have a slightly mellower sound then the
>6L6. But old black and even gray plate RCA 6L6's also have a softer,
>more laid back tone then todays modern production 6L6's or the classic
>GE and Sylvania 6L6's of the 60's.
> Personally, I would suggest trying the different 6L6's out there
>today. Try Svetlana, Sovtek, and JJ 6L6's. They all sound different.
>NOS vintage 6L6's are out there, but they are very expensive.
>Modern KT66's would also be worth a try. Believe it or not, the Valve
>Art KT66 has a very classic warm tone. I believe that one is actually
>made in China. What type of amp do you have?
> Bill
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