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  1. Lancer X

    Soldano SLO 30 combo.

    Hi SLO fans - Slight thread hijack, but wanted to ask while this has everyone's attention. What has been your experience with the SLO-30 at home practice / so-called bedroom volumes? I am planning to build a clone of the SLO-30 head, but have been considering maybe designing the power amp for...
  2. Lancer X

    Simple Attenuators - Design And Testing

    Oh! Cool, thanks everyone. I must have been thinking of a message where someone cautioned against hot-switching the bypass. Glad to hear this. I'm thinking about building this circuit right into my next amp build, so very cool that hot switching is okay. :)
  3. Lancer X

    Simple Attenuators - Design And Testing

    Curious if any of you have considered a modification such that the attenuation levels could be hot-switched without a resulting "pop" or other effect detrimental to the speaker health? Maybe something like a high pass voltage divider on the output, or the like? I'm an amp electronics beginner...
  4. Lancer X

    Simple Attenuators - Design And Testing

    Even a cheap set of step drill bits will make this project (and any future amp chassis mods you tackle) so much easier. As @JohnH said, aluminum is also much, much easier to modify than steel. A drill press is recommended. I hand-drilled mine, and it made for a pretty physical evening of...
  5. Lancer X

    Simple Attenuators - Design And Testing

    Finally completed my M2 build. Works perfectly and sounds great! Much less high end loss than my Weber MiniMASS. This is clearly a superior design. Hooked it up to my Tweed Deluxe, and at max attenuation with the amp dimed was at a mild conversational volume with no loss of character. Power...
  6. Lancer X

    Completed JohnH Attenuators?

    My M2 build (continued) - part 1 is here Used 18 gauge solid core wire throughout except for the runs to the coil on the lid. Don't recommend using solid core wire for microswitches such as these. It was a PITA to thread it through these little terminals. Completed the upper tier of...
  7. Lancer X

    Simple Attenuators - Design And Testing

    I had heard of some people receiving counterfeit Cliff ones. Any chance of that?
  8. Lancer X

    Simple Attenuators - Design And Testing

    So I’m happily wiring away when I realize I’m maybe making a mistake. See black wires in pic 1 below. Should I avoid routing wires closely in parallel like this? Am I creating a crosstalk risk? Trying to be neat and tidy, but now second guessing myself. Here an example of where I’m...
  9. Lancer X

    Completed JohnH Attenuators?

    My M2 build in project. I know - request for finished builds only. But this sinus infection said "take a night off". More wiring complete I don't have pics of yet. One resistor mistakenly ordered with big dorky leads attached. Taking stock: Planning resistor layout, based on @JohnH...
  10. Lancer X

    Completed JohnH Attenuators?

    Cool idea building them into the back of the cab!
  11. Lancer X

    Simple Attenuators - Design And Testing

    Pro tip for aspiring builders: apply your thermal compound before fastening down all your resistors, kids! :rolleyes:
  12. Lancer X

    Simple Attenuators - Design And Testing

    And so it begins… Accidentally bought one resistor with big doofy leads on it…
  13. Lancer X

    Simple Attenuators - Design And Testing

    This Etsy shop. They use a "Fender" font, and these are cut from stainless. It looks really nice: https://www.etsy.com/listing/1003504820/custom-stainless-steel-guitar-amp-badge?ref=yr_purchases I have a cool idea for my final "company" logo, but that reveal has to wait for the Bassman Micro...
  14. Lancer X

    Simple Attenuators - Design And Testing

    @Gene Ballzz we'll call this pretty much finished. (Switch 2 changes cathode bypass and cap options for V1A, and Switch 3 adds negative feedback and elimination of the bypass cap.) Just need to relabel the controls: Input, Bright/Normal, Volume, Tone, Master, Voicing (Lead/Clean/Tweed), and...
  15. Lancer X

    Simple Attenuators - Design And Testing

    Thanks, guys! I ended up ordering a Dayton Audio coil from Parts Express. Will try to create a little spacer to place it centrally in the box. Kinda makes sense that you aren’t getting any exterior EMI effects if the field is that interactive with the aluminum box. The pic is my Deluxe...
  16. Lancer X

    Simple Attenuators - Design And Testing

    @Gene Ballzz , I see that you're placing your attenuator flat in the bottom of your speaker cabinet. I assume this means you've never experienced any noise associated with the field generated by the inductance coil? I want to place my M2 box in my amp cab. @JohnH was concerned about EMI from...
  17. Lancer X

    Simple Attenuators - Design And Testing

    @JohnH , @Gene Ballzz , and crew: Here's a link to an interesting post about placement and orientation of a pair of air core induction coils versus its effect on measured inductance. Likewise, they discuss placement close to 15mm thick aluminum panels, which seems to have a major effect on...
  18. Lancer X

    Simple Attenuators - Design And Testing

    You know what - you've convinced me. :cheers: A 1590D will fit in my Deluxe Micro cabinet, so I'm gonna just build the 50W M2, with bypass I think. (Out of curiosity, I priced out resistors for a 25W model, and it was only $8 less.) If I build the Bassman Micro as a piggyback head as...
  19. Lancer X

    Simple Attenuators - Design And Testing

    Sorry, @JohnH - seeing now that this info was in your page 1 master post. Thanks for your patience.
  20. Lancer X

    Simple Attenuators - Design And Testing

    @Gene Ballzz , I love your attenuator peeking out of the bottom back vent hole. That's a handy match up. Ahh, gotcha. As a scientist, you'd think I would have understood that unit better... That's why this new hobby is fun - learning! Sorry, I misspoke! I intend to mount the M2 in its...

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