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TMB18 Voltage Test lower than expected

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t8bloom

Post subject: TMB18 Voltage Test lower than expected

Posted: Fri Oct 16, 2020 10:15 pm

Joined: Sat Sep 12, 2020 8:25 pm
Posts: 68
Location: Folsom, CA

Hi! I have completed my TMB18 build and confirmed that all the tubes heat up in standby. However when I measured voltage to the on-side of the standby switch, I'm consistently measuring 278V instead of the expected 340V. Is this good enough? I wanted to confirm before I plug in a speaker and exit standby. Thanks much!

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duhvoodooman

Post subject: Re: TMB18 Voltage Test lower than expected

Posted: Sat Oct 17, 2020 9:15 am

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Joined: Tue Jan 02, 2007 1:24 pm
Posts: 16242
Location: Albany, NY

Yeah, you should be OK to proceed. The voltages often change quite a bit when not driving the full load on the amp.

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