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β22

beta22

Re: β22

Postby amb » March 19th, 2019, 5:45 pm

R1 on the ground channel should be vacant, and R2 should be 1KΩ.

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Re: β22

Postby KASaudio » March 20th, 2019, 5:29 am

amb wrote:R1 on the ground channel should be vacant, and R2 should be 1KΩ.

I do not understand another point, where is connected to the entrance to the ground channel? Should I connect the input to the input Board on the GRD?(inp, grd). In the diagram (3-channel active ground wiring) this is not very clear.
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Re: β22

Postby amb » March 20th, 2019, 8:47 am

You don’t need to connect anything to the ground channel board’s input. If you look at the schematic diagram, leaving R1 vacant basically isolates the input from the Molex connectors, and R2 with a low value effectively grounds the input.

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Re: β22

Postby KASaudio » March 20th, 2019, 10:15 am

amb wrote:You don’t need to connect anything to the ground channel board’s input. If you look at the schematic diagram, leaving R1 vacant basically isolates the input from the Molex connectors, and R2 with a low value effectively grounds the input.

Here was my mistake, I connected the entrance with the entrance on the Board, and installed the resistor R1.
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Re: β22

Postby KASaudio » March 20th, 2019, 10:25 am

I just had an incorrect translation of the text, I asked You about it on the first page. But now everything works fine, no noise in the entire range of the volume control is not, complete silence, I'm very happy, that's just one thing I don't like, all the same strongly bask BJT(on semiconductor) on the ground channel, maybe later I'll change them anyway. Ti thank you very much for your help in assembling the amplifier, you are very patient.
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Re: β22

Postby amb » March 20th, 2019, 1:44 pm

I’m glad it’s all sorted out.

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Re: β22

Postby KASaudio » March 21st, 2019, 2:34 pm

Ti, please tell me, can I replace BC560C on BC560B, just BC560B I have in stock, well and accordingly to them to choose the BC550B.
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Re: β22

Postby amb » March 21st, 2019, 2:52 pm

No, I don’t recommend that. The B-suffix parts have much lower hfe specs.

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Re: β22

Postby KASaudio » March 21st, 2019, 3:10 pm

amb wrote:No, I don’t recommend that. The B-suffix parts have much lower hfe specs.

Thank you, I thought he had a very low hfe coefficient.
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