Philco SUPERHETERODYNE 14 Instructions Manual page 26

2. Adjusting at 1.6 megacycles — set the dial at 1.6 megacycles and adjust
the compensating condenser 14 in the same manner as described above.
8. Adjusting at 7.2 megacycles — set the dial at 7.2 megacycles and set the
frequency contre] switch in its proper position for the middle dial scale. Connect
the signal generator output direct to the antenna terminal of the converter. Adjust
the compensating condenser 6 for maximum output in the loudspeaker as described
in the first adjustment. ;
4, Adjusting at 8.6 on middle scale — turn the dial to 8.6 on the middle scale
and adjust the compensator 13 as described in the first adjustment.
6. Adjusting at 18. megacycles — set the dial at 18 and the frequency control
switch in its corresponding position. Adjust the compensator 5 as described above.
More than one signal will be heard as the adjustment is being made. Be sure to
adjust for the one which is heard second as the compensating condenser capacity
is reduced from its maximum (adjusting nut al] the way in). When this adjustment
has. been made correctly, the oscillator signal can be heard at 18, 16, 14.4 and 12.4
megacycles.. This adjustment is the most critical of any, and will require more care
in getting the correct point. :
6. Adjusting at 8.8 megacycles — (Early production). The early production
of the short-wave converter used a compensating condenser for the 8.5 megacycle
end of. the high frequency dial. This part is replaced on later production with an
1800 mmf. fixed condenser, part 6022.
Those with the compensating condenser
can be adjusted in the following manner. Turn the dial to 8.8. Adjust the compen-
sator 1] in the manner described in the first adjustment.
;
7. Re-setting 1000 K.C. Wave-trap.
Adjusting the Model 16
The adjustment of the compensating condensers in the Phileo Model 16 is
more complicated than in the ordinary broad¢ast receiver, although the principle of
the adjustments is essentially the same.
Because of the nature of this work it is
not recommended that the service man undertake the adjustments without first
studying these instructions
carefully.
-
;
'' An accurately calibrated intermediate frequency signal generator is required
for adjustments ef the I.F. cireuits. Harmonics of this generator arc used for B.F.
+
FOP SOPUSIMERIS OF . POURS. sSaPMonics oF this Pemer Bvr Arc USCG TOF avez
adjustments in the broadcast band. The Phileo Model No. 048 All Purpose Set
Tester is recommended.
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