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Salas hotrodded blue DCB1 build
Salas hotrodded blue DCB1 build
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Old 5th September 2011, 03:47 PM   #1301
necplusultra is offline necplusultra  Canada
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getting major hum on one channel, the other is good.

anyone can guide me to troubleshoot with this?

regards
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Old 5th September 2011, 03:49 PM   #1302
Tea-Bag is offline Tea-Bag  United States
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Salas hotrodded blue DCB1 build
short both inputs, one at a time, see if that helps.
By short, I mean connect input positive and ground.
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Old 5th September 2011, 04:15 PM   #1303
necplusultra is offline necplusultra  Canada
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did the short input test and same result.
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Old 5th September 2011, 04:23 PM   #1304
Tea-Bag is offline Tea-Bag  United States
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Salas hotrodded blue DCB1 build
It kinda sounds like a ground loop.
How is the system connected. If your bi-amping, turn one amp off.
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Old 5th September 2011, 04:33 PM   #1305
necplusultra is offline necplusultra  Canada
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I removed the ldr and selector switch and have only R-G-B wires hooked up to the input.

I still get a hum but now, when I short the red input channel, the hum disappears, the black channel is still ok.
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Old 5th September 2011, 04:34 PM   #1306
necplusultra is offline necplusultra  Canada
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I am driving a gainclone. No issues when I have the pass B1 hooked up.
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Old 6th September 2011, 08:59 AM   #1307
necplusultra is offline necplusultra  Canada
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I reconnected all my wires and all is working now.
Zero hum!

bass is tight and very precise. Quite pleaesd with the setup
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Old 6th September 2011, 09:04 AM   #1308
necplusultra is offline necplusultra  Canada
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pics

5V bib for driving ldr based volume
standard 38R dcb1
selector switch with led indicator
volume pot with led indicator



thanks and regards
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Old 6th September 2011, 09:26 AM   #1309
Salas is offline Salas  Greece
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Salas hotrodded blue DCB1 build
Hey, congrats. Classic diy style.
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Old 6th September 2011, 09:31 AM   #1310
Salas is offline Salas  Greece
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Salas hotrodded blue DCB1 build
Quote:
Originally Posted by necplusultra View Post
standard 38R dcb1
You mean two 38R in parallel or net total? We used 68//68 on the black boards for no sinks. Less value starts pushing it. It was 47//47 in the blue boards for small clip sinks.
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