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Author Topic: Tremolo tube  (Read 3921 times)
sinrman68
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« on: February 09, 2009, 04:22:46 AM »
Hello,

Tim Caswell modified a 100 watt Marshall Tremolo head at S.I.R sound and created a legend (the infamous #39).  I've been contemplating one of the 36 watt heads for all the benefits...half power, EF-86 channel, master volume...then I remember reading about Lee Jackson putting an extra preamp tube in all those Marshalls in the 80's and 90's...and the truth breaks about #39...now I'm thinking Bluesbreaker.

Question is, how can I pull it off?  I asked Nik and he said it would be too close to the Trannies and would pick up a case of noisy.  I know you've got to have an idea.  I wrote in another section about the 36 watt EF-86 head.  I simply don't enjoy the sound of 4 EL-84's running the powerplant.  Now I'm thinking about getting one of the bluesbreaker heads and modifying the tremolo tube to act as an extra gain stage!!!  The question-how do the KT-66's sound?

Any input is appreciated...I've saved up enough to get an amp and with the economy...it might be a while before I'm able to get another!!!  Thanks
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wyatt
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« Reply #1 on: February 25, 2009, 04:56:13 PM »
Nik's right, there is a reason the preamp tubes are so far away from the power supply.

You best bet would be to use a 100-watt chassis for a 50-watt amp or JTM-45.  You would use two octal socket holes for power tubes, a third if you want to use a tube rectifier, and then final octal socket hole, the one closest to the noval socket holes can have an adapter plate installed to make it a noval socket hole.  So, now you can install 3 octal sockets and 4 novel sockets. 

Then you have to wonder where you are going to use TWO gain stages from the new tube.  That's pretty much scratch-building a circuit layout for a whole new amp anyway.

You may be better off just going with a JCM 800 and getting the extra gain stage it already has built in.
« Last Edit: February 25, 2009, 04:58:19 PM by wyatt » Logged
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