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Well, I bought a Blues Junior to goof around with and it's one of the
best new Fender tube amps, IMHO. On the Fender Discussion Pages, BillM
(turns out to be Bill Machrone - former editor and current columnist
for PC Magazine) did a bunch of cool mods to it and on one page he
talks about the 12xx7 variants and how there IS a difference. I know
it's not an exact CT page but it'll show you how different pre-amp
tubes shape sound.
You might want to check out the Fender Discussion Pages. There are alot
of good tips there:
And BTW, the 12xx7's are pre-amp tubes. Only power tubes need to be
biased.
Good luck.
Phil
On Sunday, December 21, 2003, at 11:43 PM, red_thundr wrote:
> Ugh... tubes.
>
> Are 12AX7s typically drop-in replacements? Or am I going to have to
> whip out my voltmeter and do some kind of silly bias adjustment to
> compensate for slight manufacturing variance? I also understasnd that
> the bias adjustment can drift over time due to shock and vibration.
>
> And what are the best brands? Someone told me "Electro-Harmonix",
> someone else said "Svetlana", and yet another person said that Groove
> Tubes has a whole variety of 12AX7s to choose from, and Fender only
> uses one particular type. My biggest complaint is the lack of
> definition and clarity. Will different tubes fix the "honk" I am
> getting?
>
> I'm definitely going to try Dick's Cyber patches and see what kind of
> improvement I get. If it's not enough, I'll look into swapping the
> tubes out. Anybody got the lowdown on which 12AX7 tubes are best for
> a surf tone?
>
> Thanks!
>
>
> --- In , Christopher Darlington
> <chris.darlington@s...> wrote:
>> Red,
>>
>> Try swaping those Groove Tubes for a good set of Svetlana 12AX7's.
> I've
>> heard rave and poor reviews of the CT amp. Some sound great, some
>> complain of the same poor sound like yours . If it still doesn't
> sound
>> good after a good tube swap, off load it and fix your Marshall.
>>
>> Chris
>>
>
>
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