AES type of Battery Eliminator has hum in B+

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AES type of Battery Eliminator has hum in B+

RodB
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Posts: 1,119
Threads: 44
Joined: Feb 2015
City: Roseville, MN

03-31-2025, 09:57 AM

Mike, I did find an LDO to give me the 90 volts and I got real excited when I discovered it but then I discovered it's only good for 20ma, half what I needed.

Arran, I had to use several hundred micrfarads to smooth the A supply. These were 1.4 volt filaments and any ripple was passed on to the speaker. I was going to use an LM317 to regulate it but ended up with the brute force method.

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Messages In This Thread

AES type of Battery Eliminator has hum in B+ - by Bruce B - 03-30-2025, 09:27 PM

RE: AES type of Battery Eliminator has hum in B+ - by morzh - 03-30-2025, 09:31 PM

RE: AES type of Battery Eliminator has hum in B+ - by Bruce B - 03-30-2025, 09:41 PM

RE: AES type of Battery Eliminator has hum in B+ - by morzh - 03-30-2025, 10:24 PM

RE: AES type of Battery Eliminator has hum in B+ - by RodB - 03-30-2025, 10:31 PM

RE: AES type of Battery Eliminator has hum in B+ - by morzh - 03-31-2025, 12:11 AM

RE: AES type of Battery Eliminator has hum in B+ - by Arran - 03-31-2025, 02:21 AM

RE: AES type of Battery Eliminator has hum in B+ - by Bruce B - 03-31-2025, 09:45 AM

RE: AES type of Battery Eliminator has hum in B+ - by RodB - 03-31-2025, 09:57 AM

RE: AES type of Battery Eliminator has hum in B+ - by morzh - 03-31-2025, 10:11 AM

RE: AES type of Battery Eliminator has hum in B+ - by RodB - 03-31-2025, 10:58 AM

RE: AES type of Battery Eliminator has hum in B+ - by David - 03-31-2025, 11:29 AM

RE: AES type of Battery Eliminator has hum in B+ - by David - 03-31-2025, 11:32 AM

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