Does anyone happen to know the Ohmic value of the stepped attenuator used by the DOC on the P50 SA pre amp - is it 10k?
Thanks in advance.
Alfi
P50 Stepped attenuators
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P50 Stepped attenuators
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Re: P50 Stepped attenuators
Later preamps use 10k log film pots, so I assume the stepped attenuators were similar. HiFi Collective may be able to advise further.
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Re: P50 Stepped attenuators
Thanks Dave, that sounds about right and thank you for your suggestion to discuss with Hifi Collective. I certainly will do that,
Regards.
Alfi
Regards.
Alfi
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Re: P50 Stepped attenuators
Deos a stepped attenuator have a single ohmic value. Wouldn't it change as you stepped the volume from resistor to resistor.
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Re: P50 Stepped attenuators
Alfi, I ordered one at Hifi Collective for my AP70 a few month ago. First I ordered a Blue series, Takman metal film, 0,5W, 50k and was told that the ones Richard used are the 10k. So I changed the order to 10k. I put it in the amp and it sounds fine.
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Re: P50 Stepped attenuators
That's excellent info Hannes, thank you very much indeed.
Best wishes.
Alfi.
Best wishes.
Alfi.
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Re: P50 Stepped attenuators
Yes. I think 10k would be the least resistance or the volume would be at max all the time.Daniel Quinn wrote: ↑Mon Jun 17, 2019 8:36 am Deos a stepped attenuator have a single ohmic value. Wouldn't it change as you stepped the volume from resistor to resistor.
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Re: P50 Stepped attenuators
You're welcome. One thing I forgot to tell you is that I ordered Charcroft Z-Foils as load resistors. I know that Richard once posted that he thinks that we'll be going in a slurpers trap by ordering these, but I wanted to try them! The results are excellent but I don't know if there's a big difference to the takman metal film ones.
Best wishes,
Hannes
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Re: P50 Stepped attenuators
I don't know if carbons are better. I ordered metals because in an earlier thread Richard mentioned that he used to use these.