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Old 13th May 2018, 07:36 PM   #1081
sontero is online now sontero  Italy
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Quote:
Originally Posted by marconi118 View Post
What is the damping factor of mofo on 8ohm load?
DF=40.....good
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Old 13th May 2018, 07:48 PM   #1082
e_fortier is offline e_fortier  Canada
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40

It’s in the manual from the designer
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Old 13th May 2018, 09:08 PM   #1083
sontero is online now sontero  Italy
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Originally Posted by e_fortier View Post
40

It’s in the manual from the designer
repetita juvant
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Old 13th May 2018, 09:37 PM   #1084
e_fortier is offline e_fortier  Canada
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We were both writing at the same time I guess ;-)
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Old 14th May 2018, 02:52 PM   #1085
henrylarsen is offline henrylarsen  Denmark
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Quote:
Originally Posted by Michael Rothacher View Post
It's not just about the swing, it's also about the gain, maybe more so. My findings are that you really want plenty of both for maximum enjoyment. E.g. >18dB. My ARC preamp does great with the MoFo's, so does the cheap little Chinese Marantz clone I'm listening to right now.


Michael - is it one of the many SC-7S2 clones on Ebay you are referring to?
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Old 14th May 2018, 03:23 PM   #1086
Michael Rothacher is offline Michael Rothacher  United States
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Like this one.
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Old 14th May 2018, 03:47 PM   #1087
henrylarsen is offline henrylarsen  Denmark
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Thank you - got it M7 clone..
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Old 15th May 2018, 09:11 PM   #1088
JAGCH is offline JAGCH  Colombia
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Well, a classic newbie question.

Last night I did my first test to MOFO. At first, everything was fine, no smoke or strange sounds, but when I connected the interconnection cables there was a loud buzz. This only happened when connecting the source of sound (laptop, cell phone, cd player, on or off), and despite the noise they play music. Without interconnecting cables there are no noises of any kind in the speakers. Not even a buzz.

I did a point-to-point construction, following the Prassi layout in Post #82 (I'm sure it's fine, the problem is me). Where should I look for the problem?

I checked with the DMM any problems of poor insulation between the RCA inputs, circuit and transistors with chassis. No problems, but I noticed that checking the continuity between the positive and negative terminals of the speaker outputs gives me continuity (with the equipment turned off). Although it only happens if the choke is connected. Is it nomal in this design?. I check R5 (1K), and is ok.

I appreciate your guidance.
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Old 16th May 2018, 11:11 AM   #1089
Dennis Hui is offline Dennis Hui  Canada
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Do you get the noise even with just cable for one channel attached?
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Old 17th May 2018, 05:20 AM   #1090
JAGCH is offline JAGCH  Colombia
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Hi. Sorry for delay. Was at work. Is to late in night now. Only tomorrow will test one channel only, like you said. Thanks a lot Dennis!.
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