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Report
No.
98502
Measured at 1/8 of maximum non-clipped output;
Monitored point:
dT (K) at
198V, 60Hz
dT (K) at
242V, 60Hz
Limit dT (K)
Main transformer core
53,0
62,4
95
Sub transformer core
28,6
37,5
85
E-capacitor, C116 body
21,3
24,7
85
°C
D113 body
55,2
60,5
-
PWB near D113
36,8
41,8
95
D113 heat-sink
51,0
56,0
-
Q319 body
55,5
72,9
-
PWB near Q319
42,9
55,1
95
IC12 body
27,9
45,7
-
PWB near IC12
26,4
38,6
95
IC12 heat-sink
26,4
42,1
-
E-capacitor, C121 body
18,2
21,5
85
°C
Main heat-sink
46,6
60,3
-
Bushing
14,7
17,3
50
Top enclosure above transformer
20,9
25,0
40
Top enclosure above main heat-sink
30,1
38,6
40
Power switch knob (Non-metallic)
8,3
9,8
50
Front panel (metallic)
5,7
7,6
40
Standby button (Non-metallic)
4,4
5,9
50
Winding temperature rise
measurements
measurements
198V,
60Hz
242V,
60Hz
—
Ambient temperature t1 (
o
C) :
26,1
26,1
—
Ambient temperature t2 (
o
C) :
24,2
22,8
—
Temperature rise dT of winding:
R
1
(Ω)
R
2
(Ω)
dT (K)
Limit dT (K) Insulation
class
Main transf. primary winding (198V, 60Hz)
5,30 6,52 61,9 95 B
Sub transf. primary winding (198V, 60Hz)
2883 3185 29,2 85
E
Main transf. primary winding (242V, 60Hz)
5,30 6,72 73,1 95 B
Sub transf. primary winding (242V, 60Hz)
2883 3312 42,1 85
E
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