Search found 3893 matches

by mediatechnology
Fri Sep 20, 2019 2:08 pm
Forum: Build
Topic: MM flat preamp … i need a set of fresh ears
Replies: 18
Views: 188

Re: MM flat preamp … i need a set of fresh ears

A resistively-loaded transducer's load is "reflected" back into the generator immediately. A transformer-coupled load is reflected back into the generator after a delay. Damnit. I've been happy with the transformer and the MM preamp. I had no interest in the MC preamp but this piques my interest. I...
by mediatechnology
Fri Sep 20, 2019 1:25 pm
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1021
Views: 363323

Re: Entropy

good rainy day project DSCF0161.JPG DSCF0160.JPG This sucker drank a full half pint of rustoleum red... Now it will surely outlast me if i didn't jinx it by spiffing it up. Something odd and a little creepy, I didn't search for paint and never said "Rustoleum" out loud until I was in the walmart st...
by mediatechnology
Fri Sep 20, 2019 11:24 am
Forum: Build
Topic: VCA Multiplying DAC.
Replies: 5
Views: 20

Re: VCA Multiplying DAC.

You mentioned that the THD specs for the DAC8812 weren't specified for operation at reference levels >5V. That may be because Vcc max is 5V and though the maximum for the reference is +/-18V the distortion performance of the FET(?) switches probably degrade rapidly. It is unlikely the gates are boot...
by mediatechnology
Fri Sep 20, 2019 11:19 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1021
Views: 363323

Re: Entropy

Our water in Dallas has become very bleachy-smelling.
Dallas used to have really clean-tasting water.

We drink bottled water and filter city water with a Brita for coffee and cooking.
Probably not the best solution.
by mediatechnology
Fri Sep 20, 2019 8:50 am
Forum: Build
Topic: VCA Multiplying DAC.
Replies: 5
Views: 20

Re: VCA Multiplying DAC.

@20 kHZ the DAC8812 only provides 78 dB attenuation.
Is that enough?
by mediatechnology
Fri Sep 20, 2019 8:44 am
Forum: Build
Topic: Audio RMS versus Peak
Replies: 21
Views: 172

Re: Audio RMS versus Peak

Thanks - I think people will be more likely to follow it.
by mediatechnology
Fri Sep 20, 2019 6:18 am
Forum: Build
Topic: Audio RMS versus Peak
Replies: 21
Views: 172

Re: Audio RMS versus Peak

This thread is now hopelessly mis-titled. For the record: Their exponential transfer curve mostly makes H2 harmonics, H2/H1going higher with signal amplitude. The trick zeroes H2/H1 lowering the THD figure, but unfortunately does nothing about H3/H1. The dominate source of even-order harmonics in TH...
by mediatechnology
Fri Sep 20, 2019 6:07 am
Forum: Build
Topic: MM flat preamp … i need a set of fresh ears
Replies: 18
Views: 188

Re: MM flat preamp … i need a set of fresh ears

I just had an idea pop into my head as to why a step-up transformer-coupled input would sound so different than a resistively-loaded one. A resistively-loaded transducer's load is "reflected" back into the generator immediately. A transformer-coupled load is reflected back into the generator after a...
by mediatechnology
Tue Sep 17, 2019 6:37 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1021
Views: 363323

Re: Entropy

There is indeed a rubber gasket coupling the upper tank and the bowl.
I've had to have one replaced by someone else for the same reasons I had someone else break down my bicycle crank.

You remind me that I have a toilet fill valve that needs replacement...
by mediatechnology
Tue Sep 17, 2019 5:06 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 1021
Views: 363323

Re: Entropy

I've always had my crank torn down by a shop with the tool.
I watched them do it once and it was seized pretty tightly.
Even if I had the tool I didn't want to be the guy stripping it out.

Not familiar with the term toilet cistern.
Is that the top tank or the septic tank?