Heathkit IM 21 Schematic
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Extracted text from Heathkit IM 21 Schematic (Ocr-read)
Page 1
7-3-12
HIGH FREQUENCY l'
commune
CAPACITOR
z®
30
100
300
3|)
100
300
41K
'1 10
25V
-HEATHKXT
AC VACUUM TUBE VOLTMETER
MODEL IM - 21
CALIBRATE
CONTROL
#54-2
0N - OFF
SWITCH
0N RANGE SWITCH
NOTES
ALL RESISTORS ARE 10 WATT .
ALL RESISTORS ARE IN OHIVIS. K = 1.000 M = 1.000.000
ALL CAPACITOR VALUES ARE IN uFD, UNLESS SHOWN OTHERWISE
ALL VOLTAGES ARE FROM POINT INDICATED TO CHASSIS GROUND EXCEPT
A.C. VOLTAGES ON POWER TRANSFORIVEER FINDINGS. READINGS \VERE TAKEN
WITH AN 11 MEG INPUT V.T.V.M.
VOLTAGES WERE TAKEN WITH INPUT TERMINALS SHORTED AND RANGE
SWITCH IN 300 VOLT POSITION