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Re: Post a picture.....any picture...part deux...

mrbigbluelight wrote: »

She has some rather ugly tootsies.

That's not my first observation...I don't think I could be too critical of Ms. Suzy Parker back in the day. She was considered one of the first supermodels.

billbillw

4 ·

Re: Post a picture.....any picture...part deux...

^^^^ Companion photo

Rapper Lil Jon raps to a golden toilet in a still image taken from a music video for "Get Low #2," created as an advertisement for at-home colon cancer screening kit Cologuard.

BlueBirdMusic

2 ·

Re: EV's , who owns one and can share their ownership experience?

motorstereo wrote: »

I've never owned or plan to own an ev but I did have a thought about making a diy hybrid. I have a small inverter generator that is dead quiet and sips gas. So why not mount a wheelchair carrier on the back of the ev with a similar generator providing extended range and peace of mind? Who knows; it just might completely power the ev. No doubt that little single cylinder motor would be far more fuel efficient than just about any 4 cylinder standard car motor. Just a thought and I'm betting I'm not the first one to think of doing this.

It's not likely to work. A small generator can't produce enough current at the voltages a Tesla or other EV runs at to be able to keep ahead of the discharge rate.

But, honestly, if you were running a generator to charge batteries and operate an electric motor, you've built yourself a "plug in hybrid".

Hybrids run on the same idea as diesel-electric trains and ships. However, unlike a Prius, a diesel electric train isn't typically capable of direct drive from the diesel engine.

Most EVs run on voltages higher than 12v. They have 12v sub-systems, often run by a 12v standard lead-acid car battery to run standard automotive accessories like lights, computers and radios and window motors and such. It gets charged by the same charging system using stepping transformers and/or inverters to provide the DC voltage and current to charge it. But, the drive systems are run at a MUCH higher voltage. Typically 400VDC to 800VDC and if you take a look at the size of the engine needed to run a generator head capable of reaching 400 VDC level, you'll see why it's not likely to work as a fuel sipping wart hanging off the back of the car.

Here's a diesel generator capable of generating 400VDC:
https://polarpower.com/products/dc-generators/8220i-3ca1/

A 3 cylinder diesel engine like that is about 1.0L-1.5L which is the size of what's in something like a Ford Fiesta or a Hyundai Accent. That massive can hanging off the rear of it? It's about the size of your standard 6 speed automatic transmission that you see in modern cars. That's the generator head and it weight 3 times as much as a transmission, typically. That's the part that generates the electrical power. It is a MASSIVE winding of copper that rotates at relatively high speed for what it is (500+ RPM) inside of a magnet structure. The windings pass through the magnetic fields of the magnets which affects their polarity and that polarity switching creates an alternating current through inductance in the windings. The commutator in the generator...well, a DC Generator is a Dynamo but anyway, the commutator picks off the generated voltage from a half-turn on the generator which then converts it to a direct current.

You can get AC generators for your house and they are typically smaller and run with smaller engines but they use inverters and can get away with it 'cause the power levels are relatively low. But your average, beefy, backup or emergency generator will not be able to push a full 400VDC. Trickle charging an EV with a 30 amp 120V AC generator will work but it will take many hours to replenish. Even if you have a generator capable of handling 240V AC, it will still take forever and it will not recharge anywhere near the rate of discharge when driving.

You would need something like that 3 cylinder diesel and probably close to 1,000 pound winding of copper and magnets to generate enough power to keep ahead of the discharge rate to just keep even. Otherwise, you're pissing in the wind.

Jstas

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Re: Polk R200-GR Research Kit

All I can say is I am glad I started this hobby in an era where there was less emphasis on specifications and more on sound quality.

Maybe this was because dealers still existed or I would just randomly buy gear to try out and move what I didn't like.

Maybe this analysis paralysis plaguing this industry is due to this online only shift.

I have not once purchased a speaker based on a graph or a decay plot. In my experience it has no bearing on good sound experiences.

A prime example

Tyler acoustics Taylo 7u and super towers.

Madisound leap designed crossovers. Decently constructed enclosures by Ty. Ty himself admitted he was more of a cabinet maker than a speaker designer but he used the leap crossovers, tried and true principles with premium drives. The seas excel series and scanspeak revelator are insanely good drivers even twenty years later they are current models!

These speakers can sound absolutely incredible man, I have easily heard some of the best sound from this line up of speakers.

Ty replaced these models with the Decade series, a Danny Ritchie designed product. He used Danny's cheap Chinese seas excel knock offs drivers and Chinese premium gr research tweeter. The enclosures were built to Danny's spec and lined heavily with no rez internally and used high quality crossover parts.

Below 70db, they sounded pretty good. Great soundstage, etc.

They had absolutely no balls to them, they could not sustain anything above 75db. I tried multiple models, the d2, d3, etc all returned in under 2 weeks. My non audio friend ordered the D3, thinking my experience with the d2 was a fluke. But his exact words was it sounded like cardboard making noise. The line was insanely over damped.

On paper, I assure you the Decade series was better in every way, absolutely every way.

To date it is easily one of the poorest audio experiences I have ever been thru.