Carver Mk II series audio amplifiers

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RichP714
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Carver Mk II series audio amplifiers

Post by RichP714 » Sat Dec 06, 2008 12:45 am


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Re: Carver Mk II series audio amplifiers

Post by TNRabbit » Sat Dec 06, 2008 1:15 am

Rich~ I posted a link to your website on Polk & Klipsch forums. =D> =D> =D>
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From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

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stevewithrow
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Re: Carver Mk II series audio amplifiers

Post by stevewithrow » Sat Dec 06, 2008 1:17 am

I must say rich...very impresive...!!!!!

RichP714
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Re: Carver Mk II series audio amplifiers

Post by RichP714 » Sat Dec 06, 2008 1:11 pm

TNRabbit wrote:Rich~ I posted a link to your website on Polk & Klipsch forums. =D> =D> =D>
I appreciate it rabbit.....they mate well with both ;)

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Re: Carver Mk II series audio amplifiers

Post by TNRabbit » Sat Dec 06, 2008 5:20 pm

RichP714 wrote:
TNRabbit wrote:Rich~ I posted a link to your website on Polk & Klipsch forums. =D> =D> =D>
I appreciate it rabbit.....they mate well with both ;)
Those horny little bastards!
TNRabbit
Image

From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.

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thall
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Re: Carver Mk II series audio amplifiers

Post by thall » Sat Dec 06, 2008 6:26 pm

Excellent web site Rich. Next time I can scrape up
3 or 400$$$ without Tammy finding out, my M500t will be
heading your way.

One question I do have.....Did you give any thought to
upgrading the RCA inputs while you're at it? Seems like
gold plated is something that most builders have gone to.
Just wondering.
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RichP714
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Re: Carver Mk II series audio amplifiers

Post by RichP714 » Sat Dec 06, 2008 7:20 pm

thall wrote:.....Did you give any thought to
upgrading the RCA inputs while you're at it? Seems like
gold plated is something that most builders have gone to.
Just wondering.
The input RCA's on the M-500, 500t and 1.0t are modules that solder directly to the board. It would be a PITA to dremel out space to fit add-on seperates, and IMO not worth the trouble.

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Re: Carver Mk II series audio amplifiers

Post by docadillac » Sat Dec 06, 2008 11:33 pm

Very nice Rich. That's some great work. =D> =D> =D> =D>

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Re: Carver Mk II series audio amplifiers

Post by RichP714 » Sun Dec 21, 2008 8:55 pm

New to the site; a Forum......get to the forum through the 'contacts' tab

http://carvermk2.com

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Re: Carver Mk II series audio amplifiers

Post by RichP714 » Wed Feb 25, 2009 5:00 pm

New for 2009:

The Fulcrum Power Pivot.

I mentioned around Christmas that I had a couple of ideas. With mk II upgrades booked through July my choices were to wait until August or multi-task. I wanted to see if this idea was workable, so I decided to pull out my prototype mk II and experiment a bit.

One problem with push-pull complimentary output stages is the emmiter resistors allow a condition called common mode conduction. Near zero crossing, both polarities of the output stage are sourcing current through to the load. This allows greater heat levels, and disturbs the integrity of low level signals.

Phase I. The emitter resistors on the M-500(t) are a much higher value than they need to be. Reducing their value narrows the common mode conduction region

Phase II. strapping a transistor (and it's bias network) across both polarities of the output stage prevents both polarities from conducting at the same time.

I've had significant heat reduction, as well as increased fidelity to low level (delicate) passages. I don't have a spectrum analyzer, but I suspect the noise floor may have dropped as well.
Fulcrum power pivot 1.png
Fulcrum power pivot 1.png (59.15 KiB) Viewed 2787 times
Fulcrum power pivot 2.png
Fulcrum power pivot 2.png (54.54 KiB) Viewed 2788 times
Fulcrum power pivot 3.png
Fulcrum power pivot 3.png (58.75 KiB) Viewed 2768 times
Last edited by RichP714 on Wed Feb 25, 2009 8:28 pm, edited 1 time in total.

weitrhino
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Re: Carver Mk II series audio amplifiers

Post by weitrhino » Wed Feb 25, 2009 7:52 pm

Over my head, Rich, but I've had no reason to doubt you so far. :)

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Re: Carver Mk II series audio amplifiers

Post by OconeeOrange » Sat Jan 29, 2011 12:51 am

That "RichP714" guy seemed like a nice guy, what happened - why is he no longer posting?
I guess he was before my time and moved on to Bose stuff -

Hey, might as well have some fun with this spammer crap.

I am sure F1 agrees.
:-" :-" :-"

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Scarabeo
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Re: Carver Mk II series audio amplifiers

Post by Scarabeo » Sat Jan 29, 2011 1:36 am

OconeeOrange wrote:That "RichP714" guy seemed like a nice guy, what happened - why is he no longer posting?
I guess he was before my time and moved on to Bose stuff -

Hey, might as well have some fun with this spammer crap.

I am sure F1 agrees.
:-" :-" :-"
Your kidding RIGHT?...
BillD, You will be forever with us! RIP until we meet again on the other side...

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Re: Carver Mk II series audio amplifiers

Post by OCCD » Fri Feb 18, 2011 6:31 pm

OconeeOrange wrote:That "RichP714" guy seemed like a nice guy, what happened - why is he no longer posting?
I guess he was before my time and moved on to Bose stuff -
I wish I had one of his MODs like a 1.0t opt2
Give me a "Fist" full of coins and I'll save it for Carver gear!!!

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treitz3
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Re: Carver Mk II series audio amplifiers

Post by treitz3 » Fri Feb 18, 2011 9:52 pm

He is still active, however not on this website. He is considered a liar and a thief by some and a savior by others. I guess it depends on how much money you want to spend and how much online trust you have.
In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

The best way to enjoy digital music reproduction is to never listen to a good analogue reproduction.

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