Hi Dioklecijan
Your web site has fascinating subjective descriptions of the effects of SRPP and generally opamps, which i am fully in agreement with. Unfortunately i couldn't find anything about your implementation of the SRPP stage. Does it replace the output opamp?
regards
Your web site has fascinating subjective descriptions of the effects of SRPP and generally opamps, which i am fully in agreement with. Unfortunately i couldn't find anything about your implementation of the SRPP stage. Does it replace the output opamp?
regards
Just of curioucity
I see that you are using a wooden frame....
How does it perform without all metal chassis shielding ??
I see that you are using a wooden frame....
How does it perform without all metal chassis shielding ??
Fantastic!
This is really quiet preamp. No hum, no noise, nothing. In MC position, at full volume, you must place ear about 20 cm behind speakers to hear anything.
This is really quiet preamp. No hum, no noise, nothing. In MC position, at full volume, you must place ear about 20 cm behind speakers to hear anything.
This looks suspiciously similar to my Bugle phono stage, or perhaps great minds think alike?
Bugle Phono
One problem is R12. It's value should be a little higher because it is in parallel with R14, at least in terms of the proper time constant. That's why I used 8.45k.
jh🙂
Bugle Phono
One problem is R12. It's value should be a little higher because it is in parallel with R14, at least in terms of the proper time constant. That's why I used 8.45k.
jh🙂
Thanks Hagerman for your suggestions.
Yes, my phono is very similar with your Bugle. With opamps all good phono preamps will be similar.
Yes, my phono is very similar with your Bugle. With opamps all good phono preamps will be similar.
To hagtech : Opamps of OPA 13... family are not so good as phono preamps, 'cos they have relatively high noise - try on first position OPA 627. Also + / - 9V is not enough for good overload.
To dioklecijan : Try to change time constant : tau 1 + 2 beside first stage, tau 3 beside second - you get better SNR.
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