HP 8447D Operation And Service Manual page 34

Page 30
Model 8447D/E/F
CHANGE B (Cont'd)
Page 11, Paragraph 55, Step 10.:
Change the sentence to read: "Add the highest and lowest gains together and divide by 2; the result
is measured mean gain and should be within 1.5 dB of specified mean gain."
In step 10, under EXAMPLE, change Mean Gains as follows:
Mean Gain
MIN. ACTUAL MAX.
8447D
24.5 dB 27.5 dB
8447E
20.5 dB
23.5 dB
8447F PRE AMP
24.5 dB 27.5 dB
8447F POWER AMP
20.5 dB 23.5 dB
CHANGEC
Pages 21 through 23, Tables 4 through 6:
Change first SI entry to HP Part Number 3101-1244, Check Digit 5, Qty 1, SWITCH-PB SPDT-DB
ALTNG 10.5A 250VAC, 04757, 53-55480-120/AIN.
Change XF1 to 1400-0084, Check Digit 1, Qty 1, FUSEHOLDER-EXTR POST 15A 250 V UL,
04703,342014.
Delete entries XF1MP1, XF1MP2, XF1MP3, and XF1MP4.
Add as part of XQ1, HP Part Number 2950-0038, Check Digit 1, Qty 1, NUT-SPCLY 1/2-24-THD
.125-IN-THK, 04703, 903-12.
Page 24, Figure 11:
Change Index Number 6 to HP Part Number 08447-00002, Check Digit 3, PANEL REAR, Qty 1.
Page 28, Figure 15:
At SI LINE switch, delete switch connection between wire numbers 98 and 94. Change wire number
94 to wire number 90 and draw a jumper between wire numbers 98 and 90.
CHANGE D
Pages 21 through 23, Tables 4 through 6:
Change A1CR9 to HP Part Number 1884-0012, Check Digit 9, Qty 1, THYRISTER: SCR 2N358
TO-8 VRRM=200, 01921, 2N3528.
Delete A1R14, HP Part Number 0757-0401, Check Digit 0, Qty 1, R:FXD MET FLM 100 OHM
1% 1/8W.
Page 28, Figure 15:
Delete resistor R14 and its connection to ground.