tomb
Member of the Trade: Beezar.com
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Quote:
Actually, the heat sinks need to be tight up to the point of cutting into the Bergquist pads - which doesn't take much. As long as you have a snug fit and the lock washer is compressed, the Bergquist "flowable" substance should take care of the rest.
Just as you say, those temps seem quite alright to me. One thing to check - the volume knob should get warm (assuming you're using a metal one) to the touch after the amp has been on for 3-4 hours. This varies considerably with room temps, though. During the summer next to a bright window the knob may get warm within 1 hour, but takes a lot longer at 72 deg. and less without external influence (sun through a window).
Originally Posted by sandbasser /img/forum/go_quote.gif Hi Guys - The MiniMAX Case temp is ~ 100F directly above the LM317, ~ 87F above the BJTs. I have NOT really measured the temp of the heatsinks themselves... I'm trying to avoid taking everything apart unless it's absolutely necessary ![]() Initial setting of the bias was 50ma... I have NOT rechecked it yet - the amp has significantly less than 100 hours on it. The Triad wallwart (a 750ma unit) is ~ 102F. Room temp is ~ 72F. (I have a MicroTemp Laser Thermometer.) I guess those temps are probably OK... But, the reason I asked is that I'm wondering if the tightness of the heat sink screws matter. I didn't tighten them real tight when I installed them. Does tightness have any effect on temp??? Daveve - Thanks for the comments on listening... I am definitely enjoying listening. I currently have a set of Denon AH-D950s, Grado SR-80s and Allesandro (Grado) MS-1s (with full MS-1000 conversion). I'm in the market for a better set of phones. I'm going to go out this weekend and try some. Recommendations anyone??? (great sounding phones for MiniMAX) Thanks, |
Actually, the heat sinks need to be tight up to the point of cutting into the Bergquist pads - which doesn't take much. As long as you have a snug fit and the lock washer is compressed, the Bergquist "flowable" substance should take care of the rest.
Just as you say, those temps seem quite alright to me. One thing to check - the volume knob should get warm (assuming you're using a metal one) to the touch after the amp has been on for 3-4 hours. This varies considerably with room temps, though. During the summer next to a bright window the knob may get warm within 1 hour, but takes a lot longer at 72 deg. and less without external influence (sun through a window).