SD8000 first impressions

[MakeshiftAudio 10+ year member]

2/0 isn't even noticably bigger than 1/0 not to mention you can't pass more than 600amps without flashing the wire or melting the jacket. I'd like to see a real world app in a daily vehicle where people like me need to run 2/0 about a foot and half to the amps.

Have you actually messed with these numbers?

I've done my fair share of pulse experiments. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I used to have a 25kJ capacitor bank that operated at 17.5kV. Specs were 165uF@20kV, but I only had a 17.5kV charging source. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I have recently sold the capacitors to a fellow HVer. This array would //content.invisioncic.com/y282845/emoticons/verymad.gif.3f39c5c2fd57527b671fad3efdfac756.gif your 2/0 up like how your talking... Buuut let's get realistic:

2/0 has about .77 of the resistance of 1/0.

.00007793ohms per foot, at 600A, that makes 28W, which is the same as 28J for one second.

I do not think that would remove the insulation, much less "flash" the wire as you say, but I would not run it for more than a second or two. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[TnT_Sounds 10+ year member]

FTL:crap:, if I like you I give a turn of the knob, if not keep it down:crap:

Quoted for truth. Ask Steve Willis how crooked they are here with that thing. They claim to be real IASCA judges too. I'll never compete. Playing music in the high 150's is good enough for me.

That is if I ever find something I'm satisfied.

 

[Annnarbor84 5,000+ posts]

Quoted for truth. Ask Steve Willis how crooked they are here with that thing. They claim to be real IASCA judges too. I'll never compete. Playing music in the high 150's is good enough for me.
That is if I ever find something I'm satisfied.

You would be an idiot to compete with an AC. First time I got metered with the new setup, I was doing a 139.? on an AC. First comp I went to a week later I was doing a 147.6 on the Term-Lab, suspicious??? Not at all

 

[05_ZX636 10+ year member]

where can these amps be bought or see other amps in their line?

 

[Annnarbor84 5,000+ posts]

where can these amps be bought or see other amps in their line?

PM Murilo

 

[TnT_Sounds 10+ year member]

Have you actually messed with these numbers? I've done my fair share of pulse experiments. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I used to have a 25kJ capacitor bank that operated at 17.5kV. Specs were 165uF@20kV, but I only had a 17.5kV charging source. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I have recently sold the capacitors to a fellow HVer. This array would //content.invisioncic.com/y282845/emoticons/verymad.gif.3f39c5c2fd57527b671fad3efdfac756.gif your 2/0 up like how your talking... Buuut let's get realistic:

2/0 has about .77 of the resistance of 1/0.

.00007793ohms per foot, at 600A, that makes 28W, which is the same as 28J for one second.

I do not think that would remove the insulation, much less "flash" the wire as you say, but I would not run it for more than a second or two. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I've played with it some. A lot has to do with the joule effect and resistance and length. And just like you said was pulsated with tests. I'm talking about strictly apps where people like me run more than 1.5ft of wire to the amps. Also instead of pulsing the current through the flow would maintian consistant through a song.

 

[MakeshiftAudio 10+ year member]

If that was the case, yes, it would be rather toasty. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

500kcmil(5 runs of 1/0 or 4 runs of 2/0 or 3 runs of 3/0 or 2 runs of 4/0) would be the only thing for 1.5 feet on 14V with a cont 600A.

 

[MakeshiftAudio 10+ year member]

Lag.

Edit: Jeese, it was a lag induced double post. Maybe I should make myself clear on a petty subject. //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[Annnarbor84 5,000+ posts]

Lag.

//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif Always

 

[TnT_Sounds 10+ year member]

Me too //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif I'm tired.

Also just to clear things up. I'd probably never see 600amps of current on music with 8k. But you never know. I like to plan for the worst as I've seen some nice wire fires.

 

[DDeitz 10+ year member]

I havnt posted because of the lag, went todo other things. Hopefully memory serves me right.

As for the planning for the worst, what about using plugs in the inputs you could run 10 runs if you wanted to or 100 w\e number you felt like. If you cannot put any sort of bussbar near your amps.

the 600 amps of current on music you are probably right but, we all like to plan for the worst so i wouldnt want to daily with a few runs of 2\0 at 1.5 feet either off 8kw or more.

the instruction manual, english would be nice its my biggest pet peeve so far....we are men and claim we dont need instruction manuals however when a company fails to give us one in english for a fairly simple product to operate we get all upset //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

No such thing as a perfect product, and the flaws ive seen on these so far are minor and dont actually bother me at all.

 

[Annnarbor84 5,000+ posts]

I just spent $66.00 on Ebay due to this lag bullshit, god dammit!!!!!!!!!!!!//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[Grinder1989 5,000+ posts]

I'd love to pick up an SD. I wouldn't even mention Stetsom in this thread. Stetsoms don't have shit on the SD's.

 

[mcsoul 10+ year member]

This is going to end up making me look stupid(er) but oh well.

It looks to me like there is no input power supply like traditional

amps of this size. No big torrids and caps on the input stage.

So my belief is that job of the traditional input supply is to step up, store and

clean up the power. Am I wrong? If so, what type of circuitry is here doing

this job? None really right?

Then there is transformers coupled directly to the output stage, that's different.

Am I wrong to say that will directly step up the output voltage without cleaning

the signal (which I guess would be fine if the thd of the internal signal where

very low??)

 

[djman37 5,000+ posts]

yep, SD is high voltage, not high current.