[Harp-L] Re: Old princeton preamp swap?

[Mike Lynch <slapbackslim@xxxxxxxxx>]

Blake,

I have a '62 Princeton with all stock tubes (12AX7s and 6V6s) in it, and I can't get a decent sound out of either of my bullet mics (a crystal and a CR) with this amp.  However, both my Shure 545SD and 585SA mics sound great with it.  I can typically turn the amp up slightly over 3 with the Shure mics, which is plenty loud in the clubs that I play in (I always have the amp on a stand).   Have you tried one of these Shure wand mics with your Princeton?

Mike Lynch
Seattle


----- Original Message ----

I just received a beautiful new mic from Greg at blowsmeaway.com, with a hot
vintage CM element in it. Greg is as advertized - very patient, helpful,
and professional. (and I'm a picky pain in the...) The craftsmanship is
goregeous, and the mic has a wonderful warm crunchiness with great bottom -
it simply growls with my big chromatics and low diatonics.

I'm considering doing a preamp tube swap. I am a tube / electronics idiot (I
was raised by a pack of wild academics)  My amp is a '62 Princeton. The
problem is that I'm getting a lot of feedback at relatively low volumes.
Like, say, anything above a 2. I believe that the amp has two preamp tubes.
Both of them are 12AX7s. My understanding is that these are very "hot"
tubes, and that I may wish to consider another tube.

O.k., assuming I can get different tubes, which one or ones do I switch? How
is this done? What tubes should I look for to get more volume without
feedback?  Any other feedback advice with my configuration?

Thanks in advance.

- Blake


 
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