Someone should make an Amazon for used gear, with the same fast shipping and return policy. BC you are right and the new stuff is often such low quality.
There is a goodwill near me with OK prices, but it is a crapshoot whether what you bought will work. From what I’ve seen, used gear shops where they repair and test are mostly for rare and expensive collectors items and not worth it.
I recently had to spend $160 to buy a used VCR capable of PAL/multisystem, on eBay.
NOT a polarized plug. The hum seems the same both ways. The hum is also unaffected by twiddling the volume knob
Ty!
Yes the house speakers (almost imperceptible hum, with the wires in the wall) are amplified by an Onkyo Tx-8011, which goes through a Niles audio HDS-6 high definition speaker selection system, with the protection toggle always engaged.
For protection, it says:
Disengaged:
1-2 8 ohm
1 4 ohm
Engaged:
3-6 8 ohm
2-6 4 ohm
But honestly I don’t have the users manual and I don’t know what it means.
Back to the test setup (with the louder hum; speaker wire NOT in the walls, just draped over the dining room table), the speakers are AR18s, U028144. The 2 pronged plug is NOT polarized. I’ll look for a DC power supply and see how that goes.
I’ll try the tricks! I’m betting the volume knob / potentiometer is a cause.
Update: twiddling the knob does nothing.
They are AR something from the 70s or 80s (?). They might have been built from a kit. I’ll update when I get home.
I’ll look for a ground conntector on the chassis.
I have other speakers in the house, which connect to a whole home stereo system with wiring in the walls, which have a very very slight hum at 0 volume, compared to these. That may be the whole house being slightly ungrounded? But it is different from my test setup, which has a noticeable hum.
This “test” setup is on top of the dining room table with the stereo plugged into a wall outlet via an extension cord. About 10ft each of 16 gauge twisted wire speaker cable connects the stereo to both the L and R speaker.
The stereo is this one: Daakro AK45 Stereo Audio Amplifier,300W Home 2 Channel Wireless Bluetooth 5.0 Power Amplifier System, Home Amplifiers FM Radio, USB, SD Card, with Remote Control Home Theater Audio Stereo System : Electronics
https://www.amazon.com/gp/aw/d/B0BX8TGZZF
Thank you for sharing your expertise!
There are already no input wires (it is using Bluetooth) so I guess it is not a ground loop.
Thank you for the education! I’m assuming that the inputs, if they are grounded, can lead to the ground loop?
Thanks I’m probably going to return these.
Right now, the stereo is connected to power and the speakers are connected to the stereo and that’s the only thing that’s connected. So, either the 60 hertz hum is being picked up by the speaker wire which is unshielded as far as I can tell. Or are you saying the stereo itself could be poorly designed? Because that is probably the most likely thing with an Amazon stereo.
For some reason, this stereo only comes with a two-prong power plug, not a grounded one, so that’s probably a bad sign.
I learned a little bit about ground loop and it seems like this mainly happens when you are plugged into power using two different sources? How is there a ground loop when the speaker is connected to the stereo and the stereo is the only thing plugged into power.
Count Olaf: “Going my way?”
The fun thing is that since Lemmy, piefed, etc are open source, theoretically anyone could learn how the algorithms work…if they had the programming skills to understand the code.
You are correctly understanding the downside of federation, i.e., instead of just having one “world news” community, you could have multiple. If you subscribe to them all, you could see duplicated posts across them all, or you might miss things if you only subscribe to one, etc… These are the downsides.
There are upsides to this model too. Let me illustrate with a story in recent history. The mods of [email protected] were unhappy with some of their admin’s decisions. If this were reddit, they would be shit out of luck, because the admins are the same across all of reddit. Not so in the threadiverse! So the mods decided to hop instances to lemmy.world.
To make a long story short, now there are at least three “196” communities, with at least two of them thriving: the original 196, which moved back to lemmy.blahaj.zone by popular demand, the [email protected] community, which sprung up to serve all the people who wanted to stay on blahaj when the mods of the original comm left, and [email protected], which was the new home of the 196 mods for a short while, and persisted amongst those who wanted to stay on lemmy.world.
I feel like I’m describing the migration of the elves in the Simarilion across middle earth. But that is sort of what it was like. Reality imitating fiction and all that.
Yes, the community divided, but people were able to choose the communities and instances they wanted to participate in. And IMO the memes and shitposts are all the better because of it.
So tl;dr, yes this splits the audience, but in the end gives communities the freedom to choose which mods and admins they want, instead of getting stuck with unpopular mods or admins.
No
Fabian
The head part of the face.
Technically (H3O)+ and related species rather than naked protons in solution, but chemistry is just a series of models nested dolled in on each other trying to approximate an intelligible description of a complex physical world, so H+^ works fine in many contexts to get you correct answers, but not always.
Attention
That’s awesome. I would love to know what kind of podcast would have that!
How do scene kids relate to this image? Descend from emo?