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Messages - mikebarg

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Amplifier Discussion / Re: SWR Workingman's 12 combo- Hummmmmm
« on: January 07, 2022, 09:39:52 AM »
Ok. one of the caps has no measurable ripple, but the other has .45 vAC.

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Amplifier Discussion / Re: SWR Workingman's 12 combo- Hummmmmm
« on: January 05, 2022, 11:21:28 PM »
I don't see any DC on the speaker output.

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Amplifier Discussion / Re: SWR Workingman's 12 combo- Hummmmmm
« on: January 05, 2022, 09:31:30 PM »
I pulled the caps and tested them. The value and ESR both looked good. I re-installed them on the board. I also removed the full wave bridge and checked it out of circuit. It's good too.

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Amplifier Discussion / SWR Workingman's 12 combo- Hummmmmm
« on: January 05, 2022, 05:04:32 PM »
Well this has been sitting on the bench waiting for me to get to it. It has a moderately loud hum. I have recorded it. I thought 60hz hum but, i checked the full wave bridge and the 2 main power capacitors. They all checked good. Any ideas where to go from here. See the video here https://youtu.be/mNbTI2KNZyI

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That makes since. It wouldn't be the first time I got inaccurate information online.
I went ahead and pulled the part and it tested good. So, I need to go back and re-evaluate.

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I agree. Thanks for the input. I'm wondering if this part had been replaced before. The board is marked with an X next to the part and the size is a little too small. The legs were bent out a little to get them through the board.

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It's a DB604. According to the datasheet that's a 400V, 3A.

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Amplifier Discussion / SWR Workingman's 12 combo - Full wave Bridge spec
« on: December 10, 2021, 12:10:06 PM »
I'm working on an SWR Workingman's 12 combo(100 watts). I need  a full wave bridge rectifier. I have the schematic, but it doesn't show a spec for the rectifier. I checked the board and the spacing looks like .5 inches between legs. I'm thinking 5amp at 400+ volts should be enough. Any thoughts?

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Schematics and Layouts / Re: Randall RG100 G3 Plus
« on: December 03, 2021, 09:42:53 PM »
Thanks for the help. I've downloaded a pdf and am reviewing it.

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Schematics and Layouts / Randall RG100 G3 Plus
« on: December 01, 2021, 05:50:11 PM »
I'm trying to locate a schematic for the Randall RG100 G3 Plus. I've looked through this section already with no luck.

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