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About possible Babelfish J interest
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Old 5th December 2018, 08:53 PM   #531
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oh great, i only have two DVM haven't connected psu yet to amp pcbs and haven't measured it as well.

it's dual mono build, here's a test assemble to see how the wiring would go through...
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Old 5th December 2018, 09:01 PM   #532
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About possible Babelfish J interest
make bulb tester , and test PSUs first
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Old 5th December 2018, 10:03 PM   #533
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ok, got close to 25vdc, with 18vac secondaries from transformer sounds about right?
btw, how fast voltage should go down after disconecting mains?
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Old 5th December 2018, 10:15 PM   #534
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damn slow , if there is no load

take care to drain them off , before soldering to pcbs
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Old 5th December 2018, 10:50 PM   #535
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ok, will do! also, could you explain "shorted inputs"? i have rca terminal only.
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Old 5th December 2018, 11:05 PM   #536
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if you have just RCA input , be sure that you solder shortie ( piece of wire) between negative input and GND on pcb

shorted input means - take cheap RCA jack , solder shortie between GND and hot , and shove it in RCA in of amp

that's preventing crocodile getting in , if you leave input unguarded

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Old 6th December 2018, 09:03 PM   #537
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should i use wire as thick as possible between mosfet and amp pcb? planning to use 1.5mm
this is in case not connecting it directly to the board..
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Old 6th December 2018, 09:21 PM   #538
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D and S

Gate can be connected with tiny one

if wires longer than , say , 6 or 7cm , think about moving gate resistors to mosfet gates , series with wire (heatshrink )

then put shorties on pcbs , instead of gate resistors
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Old 6th December 2018, 09:51 PM   #539
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OK, good to know, but it should be fairly close.. ~4cm up to 5cm
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Old Today, 09:04 PM   #540
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Huh.. finally got everything connected ! Please remind me next time NOT to use mica pads + goop, it's quite a mess when attaching...

Anyways, before turning the power on - anything I should be aware of? As per instructions - planning to track voltage across R11, R29 and output node to get the right measurement adjusting the TP2, TP3 and TP1. Should I start with closed lid to get the measurements at the running temperature?
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