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Modified amplifier FROM MARANTZ PARTS

99.59.114.84
Posted on July 4, 2012 at 22:59:19
orly40@ymail.com
Audiophile

Posts: 11
Location: San Diego
Joined: July 4, 2012






I JUST PURCHASED THIS AMPLIFIER ON EBAY AND I HAVE A COUPLE QUESTIONS
CUSTOM AMP SOUNDS GREAT .IT HAS THIS COOLING FAN THAT I CAN HEAR IN LOW PASSAGES OF MUSIC MY QUESTION IS DO I REALLY NEED THIS FAN OR CAN I REPLACE THIS WITH A QUIET ONE ?
ALSO I WOULD LOVE TO KNOW WHAT MARANTZ MODEL THE POWER AMP BOARD IS AND HOW MANY WATTS IT PUTS OUT IT HAS 4 TRANSISTORS (2) C1116A AND (2) A747A IN A SINGLE BOARD .THE AMP HAS MODEL 250 METERS IN THE FRONT .ANY INFORMATION WILL BE GREATLY APPRECIATED THANK YOU ORLANDO

 

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RE: Modified amplifier FROM MARANTZ PARTS , posted on July 4, 2012 at 23:02:43
orly40@ymail.com
Audiophile

Posts: 11
Location: San Diego
Joined: July 4, 2012




 

RE: Modified amplifier FROM MARANTZ PARTS , posted on July 5, 2012 at 09:54:19
Cleantimestream
Audiophile

Posts: 5653
Location: Kentucky
Joined: June 30, 2005
 YES you need A fan, yes, you can replace with a quieter one {Pabst are quite good AND quiet}

The heatsinks present in no way can cool those transistors if you turn up the wick.
The Mind has No Firewall~ U.S. Army War College.

 

driver board, posted on July 6, 2012 at 09:07:44
airtime
Audiophile

Posts: 5068
Location: New Jersey
Joined: February 4, 2003
 can you show a picture of the driver board?

I don't know why but it doesn't look like a 250? But Marantz didn't make a large number of amps. The original outputs were SPS2324/5. check and see if it was a 15 or 16????
charles

 

RE: driver board, posted on July 6, 2012 at 11:28:12
realistico
Audiophile

Posts: 1182
Location: New England
Joined: January 12, 2003
 Couldn't be a 15 or a 16, they are dual mono amps- two separate amps sharing one face plate-so there would have to be two power transformers and two output boards. Unless this is a really radical reworking.
Maybe a 250 or 510??

dunno...
--Matt
If cutting out the middleman lowers the price, why are we paying the government to stand between us and the markets?

 

RE: driver board, posted on July 6, 2012 at 18:11:08
orly40@ymail.com
Audiophile

Posts: 11
Location: San Diego
Joined: July 4, 2012
 Thanks for the help I am thinking who built the unit started with a board and added the out put transistors of his choice because I checked pretty much every picture of Marantz driver board and none of them match . :-) :-) :-) :-) :-)

 

RE: Modified amplifier FROM MARANTZ PARTS , posted on July 10, 2012 at 10:21:05
Bold Eagle
Audiophile

Posts: 6514
Location: America's Heartland
Joined: May 27, 2001
Contributor
  Since: July 17, 2003
 If that is just two output transistors per channel, it's probably based on a Marantz 140, or maybe parts from a 2270 or similar receiver.

I don't know how hard it would be to change; but it will cool better if the fins ran vertically on the heat sink as you'd then get some convective airflow. Also, the fan doesn't doo much with the upper and lower fins. Two smaller fans placed one above the other would be quieter and more effective with the horizontal fins. You really want the airflow down between the fins. With the single center mounted fan, only the center row of fins gets the benefit of the fan.

Jerry

 

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