Chunky switches deffo the way to go!!! Good job fellaI just finished my second M2 (for a friend). Just a standard 50W M2. It was way easier than the first one (I find that with pretty well everything in life).
The huge bonus for me was Gene's layout and wiring diagram, thanks man!
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Just finished an M2 with a bypass switch on the back. I know that vent holes in the top are ideal, but I’ve got lots of holes on the sides and bottom, and I’m using it with 20w or less amps (Deluxe Reverb, SV20, etc.). Even after 2 hours of running the amps at 60% and at heavy attenuation, the top of the case where the components are mounted only got to body temperature. Seriously, my cat is warmer.
My bases of comparison are a Weber MiniMass and the attenuator built into my 12w Aiken Tomcat, and this M2 is the best of the lot! Lettering to come later.
Oh, and Hello all from my first post! I joined this forum based on the attenuator design thread. Thanks, @JohnH and the others who contributed to this project. View attachment 106726View attachment 106727
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Can you fellas edit your posts with a estimate total cost of your project?
Done, with extra commentary.Can you fellas edit your posts with a estimate total cost of your project?
There is only one box which has two separate internal compartments. It is a solid piece of cast aluminium with a divider shelf half way up. I suspect it was made this way to isolate different parts of the rf modulator circuitry that it contained.Hi @Chappy , thanks for posting . That looks to be a very neat build. I'm seeing two box sections with sides, one with stage 1 and the jacks, the other with switches and the rest? is there a photo of it all together?
Yes, and it seems to be working properly. I have only used it a bit so far. I am going to check all of my connections one more time to make sure I didn't make an error or a poor solder joint. I'm contemplating attaching a large heat sink on the top as well. It got really warm after playing the JMP50 through it for 10 min or so. Barely got warm with my 15W 6V6 homebrew head.Ah now I understand! Thanks, and it looks great. Have you tried it yet? (after resistance tests to be sure)
Yes, and it seems to be working properly. I have only used it a bit so far. I am going to check all of my connections one more time to make sure I didn't make an error or a poor solder joint. I'm contemplating attaching a large heat sink on the top as well. It got really warm after playing the JMP50 through it for 10 min or so. Barely got warm with my 15W 6V6 homebrew head.
Steve