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February 20, 2024, 02:52:01 PM

Author Topic: C4S voltage check  (Read 3595 times)

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Offline denteom

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C4S voltage check
« on: December 09, 2022, 09:36:26 AM »
After assembling the C4S of Bee2Quiet and doing the voltage checks.   The voltages I measured in terminal 1 and 11 was 170 VDC.  The manual say 150 VDC.  Is there something wrong or is this reading okay? The manual did not specify a range for terminal 1 and 11.  Do I need to change anything?

On the other hand at terminal 6 and 16 I got a reading of 120 VDC which is within range 95 to 125 VDC.

Offline Paul Birkeland

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Re: C4S voltage check
« Reply #1 on: December 09, 2022, 10:05:00 AM »
That is reasonable to see and could be a result of your AC powerline voltage being a tad high.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline denteom

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Re: C4S voltage check
« Reply #2 on: December 09, 2022, 03:02:21 PM »
Thank you. Proceeding with the attenuator upgrade. The manual says I can hook it up and give it a listen even though I have not started with the resistor and rotor switch replacement.  What sonic changes do I expect to hear?

Offline Paul Birkeland

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Re: C4S voltage check
« Reply #3 on: December 10, 2022, 05:16:08 AM »
Gain will go up a little bit and distortion will drop, as will noise getting in from the power supply.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man