Search found 4022 matches

by mediatechnology
Sat Dec 07, 2019 1:07 pm
Forum: Build
Topic: Flat Balanced Input Moving Coil Phono Preamp Construction Information
Replies: 31
Views: 1932

Re: Flat Balanced Input Moving Coil Phono Preamp Construction Information

I did some gain calculations that I will need to confirm by measurement. Assumes -60 dB input pad and medium impedance load at the output. (49.9Ω X2 build-out.) Jumper settings J4, J5, J6, J7 linked = +62 dB gain. Output = +2 dBu J4, J5, J6 linked. (J7 open) = +56 dB gain. Output = -4 dBu J4, J5, J7...
by mediatechnology
Sat Dec 07, 2019 12:57 pm
Forum: Build
Topic: Flat Balanced Input Moving Coil Phono Preamp Construction Information
Replies: 31
Views: 1932

Re: Flat Balanced Input Moving Coil Phono Preamp Construction Information

In practice the MM setup has more noise. Not in practicality, but at full volume 60Hz and harmonics dominate from the cartridge. Not so with the MC setup. This is solved. The headshell on the EPA-501H is composite, and the AT-150MLX lower body is not electrically connected to the upper. I used the ...
by mediatechnology
Fri Dec 06, 2019 8:47 pm
Forum: Build
Topic: Flat Balanced Input Moving Coil Phono Preamp Construction Information
Replies: 31
Views: 1932

Re: Flat Balanced Input Moving Coil Phono Preamp Construction Information

One recommendation - put the 4K99 resistors in the BOM. I hadn't read the build guide in-depth so I didn't know to order them. Luckily I've a good stash of extra components. I think that's a good idea. I might want to increase the quantity of the ZTX851 as well so there are some extras for matching.
by mediatechnology
Fri Dec 06, 2019 5:37 pm
Forum: Build
Topic: Flat Balanced Input Moving Coil Phono Preamp Construction Information
Replies: 31
Views: 1932

Re: Flat Balanced Input Moving Coil Phono Preamp Construction Information

I thought that chassis looked familiar.

I'll double-check my gain numbers on a board here.
The resistors looked right.
by mediatechnology
Fri Dec 06, 2019 3:54 pm
Forum: Build
Topic: Flat Balanced Input Moving Coil Phono Preamp Construction Information
Replies: 31
Views: 1932

Re: Flat Balanced Input Moving Coil Phono Preamp Construction Information

Glad it's quiet and working well for you. Thanks for joining us! That's a nice build. What chassis did you use? I'll need to think about it a little more but you might want to make sure that the jumper shunts aren't shorting to each other. They have windows on one face to retain the pin and when the...
by mediatechnology
Fri Dec 06, 2019 12:29 pm
Forum: The Peabody Lounge
Topic: Gentle persuasion over time
Replies: 70
Views: 1687

Re: Gentle persuasion over time

The acorns are a mystery.
Squirrels do some odd things.
by mediatechnology
Thu Dec 05, 2019 8:16 pm
Forum: The Peabody Lounge
Topic: Gentle persuasion over time
Replies: 70
Views: 1687

Re: Gentle persuasion over time

I harvested a bunch of paper birch from a downed tree on the hill across the street. Paper birch grows with a straight trunk with no branches until the top of the tree. The only way to get smaller branches is to cut one down or find a downed tree. I made these wall sconces for the propane lanterns ...
by mediatechnology
Thu Dec 05, 2019 8:13 pm
Forum: The Peabody Lounge
Topic: Gentle persuasion over time
Replies: 70
Views: 1687

Re: Gentle persuasion over time

I have an Arizona Ash, still living, that I believe is diseased and I decided to have it taken out next year.
I chipped out a piece of bark by hand this evening.
If it falls it might take out primary on the line across the street which feeds the entire block.
by mediatechnology
Thu Dec 05, 2019 3:11 pm
Forum: The Peabody Lounge
Topic: Gentle persuasion over time
Replies: 70
Views: 1687

Re: Gentle persuasion over time

Gold wrote:
Thu Dec 05, 2019 2:13 pm
A person I know who is an arborist recently had an accident that may permanently put him in a wheelchair. It's a family business and he's been doing it his whole life. Be careful.
Why I don't climb.
by mediatechnology
Thu Dec 05, 2019 8:16 am
Forum: The Peabody Lounge
Topic: The Great Replacement
Replies: 4
Views: 60

Re: The Great Replacement

UN's Agenda 2030 Translator: How To Read The UN's New Sustainable Development Goals https://www.zerohedge.com/geopolitical/agenda-2030-translator-how-read-uns-new-sustainable-development-goals Stockholm: Elderly Residents Kicked Out of Apartments to Make Way For Migrants https://summit.news/2019/12...