Supro 1610RT Comet getting HOT!

Discussion in 'Glowing Bottle Tube Amp Forum' started by MikeBee, Jul 29, 2021.

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  1. MikeBee

    MikeBee TDPRI Member

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    Hi, I was playing about 2 hours max and shut the amp down, it was HOT! The screws holding the carry strap were so hot, I could not keep my fingers on them for more than 2 seconds or so. I pulled the back cover off, the entire metal chassis was very warm. The main source of heat seemed to be the power transformer. Still hot after an hour. I pulled the chassis out of the cabinet. Should the power transformer be putting out so much heat?? I feel I need to install a vent up top. The PT heat can only go down to get out of the cab. I don't think the back panel is the problem. I think the main problem, assuming the PT heat is normal, there is no vents to allow the hot air to escape out the top. Anything else to look for?? Don't really want to hack it up with holes. Maybe space the speaker plate out? That could get a bit of air flow going and look like hell, maybe sound different.
    Any ideas how to keep this thing cooler? All that heat can't be good.
    Thanks, MikeB
     
  2. MikeBee

    MikeBee TDPRI Member

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    I started putting it back together. I could lower the entire chassis in the cab about a half inch. That would leave a half inch gap between the cab and the chassis at the top. Rivnuts or through bolts with nuts. Would be able to reuse screw holes in cab. Would need new back panel. Would like it to look original if I ever sell it. upload_2021-7-28_23-16-39.jpeg
    upload_2021-7-28_23-24-59.jpeg
     
  3. teleman1

    teleman1 Friend of Leo's

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    So you remove the chasis to change tubes? Get a whisper fan than runs on 9 or 12 volts. Use a wall wort to power it and mount it inside somewhere. A lot of it is the tubes boxed in there. Using the whisper fan will be an easier choice than cutting vents and do it better.
     
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  4. Lynxtrap

    Lynxtrap Tele-Afflicted

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    It doesn't seem normal for a PT to get that hot.
    Most of the heat should be generated by the output tube. The tubes seem to be mounted sideways and the output tube is right underneath the handle. The way it looks to me, hot air will be trapped inside the top of that cab and might warm up the PT as well. If they didn't put venting holes in the top of the cab, I don't know what they were thinking.
    A fan might help somewhat, but heat still wants to travel upwards.
     
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  5. MikeBee

    MikeBee TDPRI Member

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    The chassis does need to come out to remove the tubes.
     
  6. Joe M

    Joe M Super Moderator Staff Member

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    Yup, sure does; definitely not user-friendly....:rolleyes:
     
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  7. Charlodius

    Charlodius Tele-Holic

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    I have a couple EL84 amps that you could cook an egg off of. Even a tiny fan placed outside the cab but blowing in the general direction of the inside of the amp will make a huge difference.
     
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  8. muscmp

    muscmp Tele-Afflicted

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    have you contacted supro? maybe it is a known issue.

    play music!
     
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  9. teleman1

    teleman1 Friend of Leo's

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    I had a classic 20 Peavey el-84 It cooked, you could burn yourself.
     
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  10. MikeBee

    MikeBee TDPRI Member

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    I lowered the chassis in the cab 1/2" and cut some scrap plywood for the back. Looks lousy, the heat now just rises out, doesn't retain any. Happy with the functional results, will do something else with the back- match's my playing abilities. May have been a solution without a problem???
     
  11. Torren61

    Torren61 Poster Extraordinaire Gold Supporter

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    How long have you had it? Have you contacted Supro? Seems like only a matter of time before something cooks and fails. The you have a dead amp that probably ends up in a landfill.
     
  12. uriah1

    uriah1 Telefied Gold Supporter

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    You could fry an egg off old voxes
     
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