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Hi, new member here, and fingers crossed - hope you guys can help me understand a few things here!
Super excited about trying a Weber 5e3x2 layout, except the have the 5e9a front end. I’ve already collected the iron, board and parts for the bulk of the build, including a 5e3x2 chassis, which I’ve punched for the Speed & Intensity, and additional jack for the footswitch, a Tremolux board from Watts Tube Audio, Classictone 40-18029 PT & 40-18088 OT, and the board is for the most part built . . . maybe a bit presumptuously! Attached picture of board so far.
I’ve built a couple of ’68 era Plexis (50w & 100w) and understand “some” terminology and topology, but not enough to sort out a few concerns with the double power Tremolux. Like most kids, I’ve used Layouts over Schematics
/ so I’m trying to catch up on actually understanding of how the amp works. Onto some concerns or observations?
At the Paraphase PI, on the 5e9a layout, the PI filter (20uF) supplies both the power tube screens and the PI tube plates. On the 5e3x2, the 20uF just supplies for the power tubes. I’m assuming this is ok?
3M Speed & Jack, I’ve read to ground the jack to turn OFF (and ON) the Tremolo, but not sure how to wire the 3MRA pot, since it is not the original 2M switched pot.
Still debating on which PT taps to use with which rectifier tube, and whether to run 6v6s (12w) or 6v6GTAs (14w). I’m building a Pro sized old pine cab for a 1x12, and another same 1x12 extension cab to add if “the gig is bigger”. Possibly adding a 1/2 power switch.
Any thoughts, input, warnings or observations on my project here would be hugely appreciated, and thanks in advance for your time & knowledge!
Regards,
Dave
Super excited about trying a Weber 5e3x2 layout, except the have the 5e9a front end. I’ve already collected the iron, board and parts for the bulk of the build, including a 5e3x2 chassis, which I’ve punched for the Speed & Intensity, and additional jack for the footswitch, a Tremolux board from Watts Tube Audio, Classictone 40-18029 PT & 40-18088 OT, and the board is for the most part built . . . maybe a bit presumptuously! Attached picture of board so far.
I’ve built a couple of ’68 era Plexis (50w & 100w) and understand “some” terminology and topology, but not enough to sort out a few concerns with the double power Tremolux. Like most kids, I’ve used Layouts over Schematics
/ so I’m trying to catch up on actually understanding of how the amp works. Onto some concerns or observations?At the Paraphase PI, on the 5e9a layout, the PI filter (20uF) supplies both the power tube screens and the PI tube plates. On the 5e3x2, the 20uF just supplies for the power tubes. I’m assuming this is ok?
3M Speed & Jack, I’ve read to ground the jack to turn OFF (and ON) the Tremolo, but not sure how to wire the 3MRA pot, since it is not the original 2M switched pot.
Still debating on which PT taps to use with which rectifier tube, and whether to run 6v6s (12w) or 6v6GTAs (14w). I’m building a Pro sized old pine cab for a 1x12, and another same 1x12 extension cab to add if “the gig is bigger”. Possibly adding a 1/2 power switch.
Any thoughts, input, warnings or observations on my project here would be hugely appreciated, and thanks in advance for your time & knowledge!
Regards,
Dave
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