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by Gold
Sun Jan 14, 2024 4:39 pm
Forum: Pro Audio Design
Topic: A "Dummy" Cart For Phono Preamp Noise Testing
Replies: 33
Views: 16725

Re: A "Dummy" Cart For Phono Preamp Noise Testing

When I originally built the PTS I tried de clicking flat vs RIAA. It didn’t seem worth the trouble to me. Using RX. I don’t deal with pre RIAA curves. That miniDSP stuff is great. I have an MCH Streamer I want to use to pass native DSD for a cutting rig. A full blown Pyramix isn’t in the cards becau...
by Gold
Sun Jan 14, 2024 3:28 pm
Forum: Pro Audio Design
Topic: A "Dummy" Cart For Phono Preamp Noise Testing
Replies: 33
Views: 16725

Re: A "Dummy" Cart For Phono Preamp Noise Testing

mediatechnology wrote: Sun Jan 14, 2024 2:53 pmIt's the premise of the whole gizmo.
I’ve never been interested in that part of it. I’m still not. It seems like a lot of hoops to jump through for little benefit. I’ve never had a problem with declicking after RIAA.
by Gold
Sun Jan 14, 2024 12:56 pm
Forum: Pro Audio Design
Topic: A "Dummy" Cart For Phono Preamp Noise Testing
Replies: 33
Views: 16725

Re: A "Dummy" Cart For Phono Preamp Noise Testing

I bought the Cosmos DAC. The driver software was pretty wonky. It was a while ago but you couldn’t set it up and have it keep settings. The setting it defaults to were useless. It got put on a shelf. If anyone wants it a nominal fee plus shipping and it’s yours.
by Gold
Sun Jan 14, 2024 12:52 pm
Forum: Pro Audio Design
Topic: A "Dummy" Cart For Phono Preamp Noise Testing
Replies: 33
Views: 16725

Re: A "Dummy" Cart For Phono Preamp Noise Testing

Makes sense, I believe it is a bit of hair splitting, but, I guess I would have to listen to the difference between raw-processed and with RIAA. I’ve always done declicking to the RIAA de emphasized signal. Processing audio without being able to hear the result until two steps later is a bad idea i...
by Gold
Fri Dec 08, 2023 8:02 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 251
Views: 6533806

Re: Phono Transfer System Construction Information

mediatechnology wrote: Fri Dec 08, 2023 7:37 pm They don't terminate it though because R4 and R5 are in series with a high impedance op amp input.
i guess termination is the wrong word. Wouldn’t it alter the source impedance the opamp sees? Best to avoid that.
by Gold
Fri Dec 08, 2023 7:24 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 251
Views: 6533806

Re: Phono Transfer System Construction Information

I guess if I use the MM preamp as an MC preamp with a transformer in front of it I should use 0 ohm so it doesn’t contribute to the termination resistance. I think that’s what I did last time for the DL103 MC pre. I should open that up and take another look.
by Gold
Fri Dec 08, 2023 4:11 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 251
Views: 6533806

Re: Phono Transfer System Construction Information

Thanks Wayne!
by Gold
Fri Dec 08, 2023 2:45 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 251
Views: 6533806

MM Preamp R4 & R5

Wayne,
I went through the threads but couldn't find or missed an explanation of the function of R4 and R5 in the flat MM Phono Preamp. It says the value can be 0Ω -499Ω. Could you explain what the function of these resistors is and how to pick a value? I think I knew this at one time but forgot.
by Gold
Mon Aug 14, 2023 11:32 am
Forum: Pro Audio Design
Topic: The Waveulator: Two VCA-based Clipper Saturators
Replies: 90
Views: 187469

Re: The Waveulator: Two VCA-based Clipper Saturators

I hadn’t been paying attention to this because I thought it was a distortion box, which is not high on the list. The limiter function is very interesting to me though. I might need one of these.
by Gold
Wed Aug 09, 2023 11:24 am
Forum: Build
Topic: Transfer Filter / Neumann HT75 Replacement Construction Information
Replies: 22
Views: 62703

Re: Transfer Filter / Neumann HT75 Replacement

This was an excellent addition. I immediately put everything to use. The Widener sounds excellent. I even did two knob clicks on a track.