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MKII parts difference btwn M-500 and M-500t
Michael8itOffline
#1 Posted: Thursday, February 16, 2012 10:19:55 PM(UTC)
 
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Michael8it

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I am overhauling my M-500 starting with all the caps and PS board.  Ill do the transistors later...
 
Are the Caps the same for the M500 and M500t MKII Mods?  I tried the link on the M-500 MKII post but it takes me to the M500t Mod.   
Carver C-1, Oppo DV980H, Yamaha RX-A1010, Modified Polk RTA 12B's, CS1 Center Channel, OWM3 surrounds.
Unused: Carver M500, M200t


1 user thanked Michael8it for this useful post.
Jim Coash on 2/21/2014(UTC)
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RichP714Offline
#2 Posted: Thursday, February 16, 2012 10:35:15 PM(UTC)
 
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From that link.....
RichP714 wrote:
.....The M-500 mk IItm  is extremely similar to the M-500t mk IItm. There are a few differences in the small board capacitors, and the triac control circuit uses a different bridge rectifier, but otherwise it's not really worth repeating the post.
Enjoy!

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Jim Coash on 2/21/2014(UTC)
Michael8itOffline
#4 Posted: Friday, February 17, 2012 9:19:59 PM(UTC)
 
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The caps I can figure out.  Where do I find the info for the correct bridge rectifier ?
Carver C-1, Oppo DV980H, Yamaha RX-A1010, Modified Polk RTA 12B's, CS1 Center Channel, OWM3 surrounds.
Unused: Carver M500, M200t


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Jim Coash on 2/21/2014(UTC)
RichP714Offline
#5 Posted: Friday, February 17, 2012 11:00:30 PM(UTC)
 
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It should be called out in the service manual: looks like I'm using KBP206G and DF01M
Enjoy!

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Jim Coash on 2/21/2014(UTC)
Michael8itOffline
#6 Posted: Saturday, February 18, 2012 1:00:34 AM(UTC)
 
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Thank you.  I did not know if it was an 'upgrade' component or stock.  Thanks.
Carver C-1, Oppo DV980H, Yamaha RX-A1010, Modified Polk RTA 12B's, CS1 Center Channel, OWM3 surrounds.
Unused: Carver M500, M200t


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Jim Coash on 2/21/2014(UTC)
Ar9JimOffline
#3 Posted: Thursday, May 5, 2016 10:51:33 AM(UTC)
 
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RichP714;86720 wrote:
From that link.....
RichP714 wrote:
.....The M-500 mk IItm  is extremely similar to the M-500t mk IItm. There are a few differences in the small board capacitors, and the triac control circuit uses a different bridge rectifier, but otherwise it's not really worth repeating the post.

Is it possible during the MkII upgrades to an M500 to make the changes to a "T" version?  Just wondering if a guy had a 500 and a 500t if they could be made to match without lots of work? Also could someone who has both, comment on the difference in sound. Is the difference substantial in your opinion? I have only heard "T" to this point..Also, all of the "t"s  I have seen were made in Japan. Were all "T"s made in Japan? How about the M500 non T, USA or Japan, both? Been on a M500 kick lately and enjoy the research. Appreciate the input from those who have been there and done that.. Thanks
Nahash5150Offline
#7 Posted: Thursday, May 5, 2016 11:19:45 AM(UTC)
 
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The short answer - no.
 
There isn't much of a difference in sounds at all. The BIG difference is that the gain of the M500 (29dB) is different than that of the M500t (26dB).
 
The power supply regulation circuits differ, but the amplifier circuits are virtually the same. The M500 has chokes on its outputs, which could improve high-volume stability, but that's about it. 

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Ar9JimOffline
#8 Posted: Thursday, May 5, 2016 11:31:06 AM(UTC)
 
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Nahash5150;266535 wrote:
The short answer - no.
 
There isn't much of a difference in sounds at all. The BIG difference is that the gain of the M500 (29dB) is different than that of the M500t (26dB).
 
The power supply regulation circuits differ, but the amplifier circuits are virtually the same. The M500 has chokes on its outputs, which could improve high-volume stability, but that's about it. 

Nahash, I just want to make sure I understand. So at the same given input, the M500 would output 3 db more than the "t". Not to be confused with power ratings or other specs.. Just gain difference.  When you say BIG, IIRC doesn't a 3 db change require a 100% increase in power. That would be BIG for sure if I comprehend and remember correctly.
Nahash5150Offline
#9 Posted: Thursday, May 5, 2016 12:21:04 PM(UTC)
 
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Nahash5150

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3dB increase in voltage equates to twice the power.
 
But, that's confusing with respect to gain. Gain just means input to output ratio. A higher gain amp just means it takes less voltage to produce the same power output as one with lesser gain.
 
It's by comparison - that is, a ratio. The M500 cannot produce more max power than a M500t - it just generates more power with the same input.
 
Max input voltage to max power output:
 
M500 - 1.414Vrms IN = 250W out (into 8 ohms)
M500t - 2.0Vrms IN = 250W out (into 8 ohms)
 
All this means is that as you increase volume, the M500 gets louder sooner. But at max power, same loudness. So if your pre-amp can produce 2.0V output, then M500t can be driven to max power. If not, then you would need an amp with more gain.

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3 users thanked Nahash5150 for this useful post.
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Ar9JimOffline
#10 Posted: Thursday, May 5, 2016 12:35:32 PM(UTC)
 
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Excellent. Thanks for sharing Greg.
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