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  1. J

    Simple Attenuators - Design And Testing

    That's super easy to do, I have a 3amp variable DC PS that can output between 5-50vdc. I have some more tiny heat sinks on the way. When you say long time are you talking hours, days?
  2. J

    Simple Attenuators - Design And Testing

    R1 in this design is 4 35w 15ohm resistors in series/parallel. I can put sensors on them and run the leads out the front panel with the lid on.
  3. J

    Simple Attenuators - Design And Testing

    Did some initial testing today with the lid on. Test one - Cranked Blues Jr for 20 minutes Result; Chassis never went above ambient (18c). Test two - Cranked JTM45 w/ KT88's biased warm into single 8ohm C-Rex. Result; quickly warmed up to 40c, after 20 minutes 60c, after 25 minutes 65c and...
  4. J

    Simple Attenuators - Design And Testing

    The components can handle it if the design is properly implemented. If it melts I don't think I will like the idea of the design either :) I'll post an update when the rest of the parts are in and it's been through a round or two of ROCK. I had two EE friends in different fields who know way...
  5. J

    Simple Attenuators - Design And Testing

    Still waiting on a few parts, so far looking good..... It took me about 20 minutes to solder all the components on the board by hand. - The side rails fit tightly in the slot. - SMD parts were very easy to solder but it took some extra time to get the solder to flow on the heat sink pads. Hope...
  6. J

    Simple Attenuators - Design And Testing

    My shopmate Simon turned me on to this thread and is making a 16 ohm version with big resistors for his rig this weekend. If we like it I'm going to make some SMD prototypes up. I have tried to make a lot of different attenuators over the years and for various reasons never made it a project...
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