Rotel RT-426 Bedienungsanleitung Seite 4
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L 001
AM
SG
Ste
L 205
Pin
AM
IFT
2nd
L 206
AM
IFT
3rd.
Fig. 1.
AM IF and RF Alignment Hook-Up (RT-426)
Abb.
1.
AM-ZF und HF.Abgleich
Fig. 1.
Alignement AM IF et HF (R T-426)
AM IF and RF Alignment Procedure (Part I MW
PART 1: MW Section (AM/FM,
Instruments:
AM Signal Generator and AC VTVM.
NOTES: Set function selector switch to MW or AM position.
Input signal must be kept as low as possible to avoid AVC action.
Step
Connected
Pin No.9 through
a 0.01
capacitor
Test loop radiate
2.
signal into ferrite
loop stick antenna
3.
4.
Repeat steps 2 and 3 until no further
CHASSIS
( AM PORTION )
2-4
CT'
CT2
10
OSC
ANT
L 203
The
dotted
symbol
parts for
(RT-426)
LW/MW/FM)
Generator
to
Frequency
455kHz
mfd
(400Hz
30% mod.)
600KHz
(400Hz
30% mod.)
1400KHz
(400Hz
mod.)
TOP
VIEW
AM
SG
L 205
AM
I FT
2nd.
L 206
AM
IFT
3rd.
line
is additional
LW/ MWIFM
1.207
Fig. 2.
AM IF and RF Alignment Hook-Up (RT-726)
Abb. 2. AM-ZF und HF-Abgleich (RT-726)
Fig. 2.
Alignement AM IF et HF (RT-726)
Tuning
Dial
Setting
Non interfering
at low
end
of
scale
600KHz
on dial
scale
1400KHz
on
dial
scale
improvement
is noticed
LOOI
Ste
2-4
CT'
Pin
10
OSC
Section)
Adjust
L204, L205,
Maximum
L206.
reading
(on IF PCB)
on AC
L203(OSC),
LOOI (ANT)
lead line
side
CT4(OSC)
and
CT2(ANT)
(all on v.C)
CT2
ANT
L 203
Adjust
for
VTVM
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