Is a Mini Switch ok for an OT/ speaker out switch?

Discussion in 'Amp Tech Center' started by schmee, Feb 18, 2020.

  1. schmee

    schmee Poster Extraordinaire Silver Supporter

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    I put this mini toggle in because it fit a hole already in the chassis of my Mono 15 conversion to Princeton.
    It's for the multitap ouput transformer.
    I dont know if those mini's are up to the task really.... 125 v ac rated...
    right there in front center:
    [​IMG]
    [​IMG]
     
  2. kbold

    kbold Tele-Afflicted Silver Supporter

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    If it fails .....
    Better would be 2 sockets: one less component to fail, and you'll only be switching with cab changes.
     
  3. moosie

    moosie Doctor of Teleocity Ad Free Member

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    It's the current that's the issue here, right? Voltage steps way down post OT, and the current conversely rises. That's my understanding, at least, and I wonder if that toggle gets really hot...
     
  4. Bill Moore

    Bill Moore Tele-Afflicted Silver Supporter

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    I had a '94 Twin chassis that had a multi tap OT, Fender used a simple 3 position slide switch, similar to the "bright" switches. I doubt the mini switch will handle any less current!
     
  5. moosie

    moosie Doctor of Teleocity Ad Free Member

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    Minimum gauge for speaker wire should be conservatively calculated to handle 3.5A.

    I just looked up a random brand 125V mini toggle, and it's rated for 5A, so you should be fine.
     
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  6. schmee

    schmee Poster Extraordinaire Silver Supporter

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    Thanks, interestingly Carling does not put amp rating on the minis. The normal bigger amp style are rated at 3 amps.
    These minis are not rated for amps but do say "Insulation Resistance Dielectric Strength 1000 MΩ min. 1500 Volts RMS @ sea level"
    Weird. I'll likely replace it with a full size when I get a chance.
     
    Last edited: Feb 19, 2020
  7. schmee

    schmee Poster Extraordinaire Silver Supporter

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    Thinking out loud... wouldn't a DPDT, instead of SPST, spread the load across 2 contact sets instead of one?
     
  8. moosie

    moosie Doctor of Teleocity Ad Free Member

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    How, it's a single lead, hot lead, right? Series, not parallel. Same load.

    If I'm understanding you...
     
  9. schmee

    schmee Poster Extraordinaire Silver Supporter

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    I was thinking with two separate "switches within a switch", but if I wire the switch sides in parallel, so the flow is through both sides of the switch, then each half takes half the load. Right?
    [​IMG]
    At any rate, I found a similar switch I had that does have an amp rating on it, and it's stamped 5 amp surprisingly... for a mini switch. So it should be fine.
     
    Last edited: Feb 19, 2020
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  10. moosie

    moosie Doctor of Teleocity Ad Free Member

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    Or not surprising. That's what I reported, too, if you recall.
     
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  11. schmee

    schmee Poster Extraordinaire Silver Supporter

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    Yeah, but the large Carling are rated at 3 amp!
    Hey are you the Moosie that used to haunt the Weber forums a lot?
     
  12. moosie

    moosie Doctor of Teleocity Ad Free Member

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    Ah, I see...

    No, wasn't me!
     
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