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Old 1st October 2009, 05:44 PM   #41
toufu is online now toufu  United States
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Trying to gathering up the parts for a build. Can C3 (10uf 50V) on the phono board use 35V caps?
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Old 1st October 2009, 05:55 PM   #42
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Any voltage rating on that cap will do fine
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Old 1st October 2009, 09:10 PM   #43
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The challenge is the 1k69 resistor. Caddock standard is 1k62. Only one I could find with that value is Holco.
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Old 1st October 2009, 09:23 PM   #44
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Percy carries 1K62 Caddocks, but this value does not seem to be critical?
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Old 1st October 2009, 09:27 PM   #45
hayenc is offline hayenc  United States
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Did not think it too critical, but Percy is away until mid-Oct and wanted something to put in the circuit. Will order from him when he is back.
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Old 1st October 2009, 10:31 PM   #46
ahaja is offline ahaja  Poland
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Ideal value is 1596R - instead of 1k62.
You cannot change it to other value because you change RIAA.
K
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Old 7th October 2009, 10:14 AM   #47
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Hi Peter,

The phono project looks great!

Would this phono amp also be able to handle MC cartridges directly?

Also your board accomodates the Hammond transformer. Could I buy this one from you as well? (would save a lot in transport costs)

Thanks...
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Old 7th October 2009, 01:38 PM   #48
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This circuit is designed to handle MC cartridges directly. I've been using it with Shelter 901 and did a lot of tests with ZYX Universe.
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Old 7th October 2009, 01:55 PM   #49
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Quote:
Originally Posted by Tarasque View Post

Also your board accomodates the Hammond transformer. Could I buy this one from you as well? (would save a lot in transport costs)
I can also supply transformer, but airmail shipping to EU would cost you additional $20
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Old 20th October 2009, 03:17 PM   #50
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Default Attenuator value

Peter,

I'm interested in building one of your phono stages and it will be driving a passive attenuator. What input impedence would you recommend? The attenuator output will be driving an active x-over which was designed for 10K impedence. I'm wondering if I'll need a buffer.
Thanks in advance.
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