Hobby Electronics AF-606K User manual

HOBBV ELECTRONICS
ALL MODE ACTIVE FILTER
MODEL AF-SOSK
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••••
••••
••••
• •••• •
• CW, SSB, AM, FM""i"-CO)-'E:-r't::t:,·-·-c !#Eff, ~· - r, -lf'1r'
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e CW W'.Jl!O) Low-Q· 4A. 7" - :/fflli&'.f(iif~>~-:; F ,..{A.7?717 ' @1
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[lf)~.J!XIJ ~-t- 'r-YL"-!i:rn ili ~ IH-t. ( AF -606K O)b)
• ff'ifO)~ ' •9 cm ;r..~· - n - ~?" - A.J:mi t:$<tm!L -c' ·.t:-t.
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MODEL AF-406K
• •••
• •••
• •••
, .... .
:iE::tl SPECIFICATIONS
MODE NOTCH Center Frequency
Wi
dth
SSB High Pass
Low Pass 2.5kHz
2.0kHz
.l.SkHz
cw (Band Pass)
Center Frequency
Width
PLL
Center Frequency
Lock Range
lnput Voltage
Tone Frequency
Input Max
Nominal
Po,,;er Output Max
Power Source Voltage
Consumpsion
Dimensions
Net Wei
ght
AF-606K
AF-406K
300-3,000Hz
50-600Hz at Fo=750Hz -2o ctB
500Hz -6dB 12dB/OCT
2.500Hz - l OdB 12dB/OCT
2.000Hz -lOdB 24dB/OCT
1.500Hz - l OdB 36dB/OCT
500- l.200Hz
-170Hz
-3dB
140Hz -3d B 140Hz
-3dB
llOHz -3dB llOHz -3dB
80Hz -3dB 80Hz -3d B
500- l,200Hz -
70Hz -
O.l-2V
-
'
500-2.SOOHz -
4V (2W)
2V(0.5W)
1.7W/
8Q
DC13 .8V( l2- 15V)
200mA
150Wx62H x 150Dmm
lkg

< AF-SOSK >
<" '':..-""'':Acf>·C.·l!l;.1uu111!l
Bandpass Freq. Control .
~ 11:.!J1'/,;;7"-:S'
Pilot LED
·v 11»:A1' ., 7
Line Switch
PLL Free·run Freq. Control
(FJG.l)
~Ee Positive
8 Negative~!!:=:==:~~;::'= 'DC13.8V
Ei:) .Positive 8 7 - ?iM 8 Negative
White line
•••
••••
••••
, •••• @
I PLL!ll:t:/L-:9-~ - /Ul)I
PLL Tone freq. adjust ~/ . , 7i.;i;~U1!l
Notch Band Wi dth Adjust
~7:..-:;;...-,1"\-Q')tf.IS~t.::" - 1' - il7-""
RCA Plug Shielded wire To a External Speaker jack of a transceiver.
~ I~ ~
;;;11~'1'1!Ht 11-JaY i: ll~'l'-llltt 7-:>.lll
(FIG.2) Soldered
To ground of a transceiver.
11~: Jf>:fll!O)-.lt i'- /.11. 'telE: ft~nt.: U'iiilt (DC) 13. 8V1:'. ;;£ir.f'ff:IJ1:200mAU
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lf\1 J»'tl: l± :b
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@ ~7;...- y -1<·- 0) ...... ·:1~·:t; -;...-/l\n ....... tUxL L"bfi!ff!l:I H UT:b'. ;js:.llO)~ i~
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:l:T.
' e iffi:ll!l~l;t~7;...-:;; - , <- (·~f. 1 .'tl~-r'l'f• •;l:T. (AF-il06KO)PLL :f.::J::.-
a/l;t~~:l:T. l
NOTCH ···/77· 711v?-11 ·~ 1. 1if c:~;l:tl.ol::'-H\'~O) - ~Lf.:~ - ;...
O)V;;tftf i.-llll 'J~<t.:11>c:f4!ffl LiT.
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ilUl-t <>l~iJi'.c:-t·;1~L;t-t.
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:b'~ i<~'> ;I: T. ~;t<L T~ ;1:1" U·:1+l.lliJ:lc.~J!l!l:b'LC:< < ~'> ;t-t . (FIG.J)
• /·:1'1-·7-1 w?-11SSB. CW. PLL O) T..-.<L" O)~ - ~'1'.'lhlt-Li-t. Iii!.
fflLT.t• ·~~11..l:;Je(!).@O)-?;l:h~ilt:liluJC:• •..,1.:;\ -t:lt!IL L"i>·~ ;t-t.
10
20
50
60
(RG .3)
NOTCH FILTER
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Min 1-
wa
1,
1,
I
Max
10 L-~~ ~~ ~~~~~~~~~~~~~~~~~~---'
7 10'
frequoncy(Hz)
(RG.4) sse BAND PASS FILTER
10
20
Hi ilhPHS
50
60
10 L..~~~~~~~~ ~ ~~~~~~ ~~~ ~~~~--'
10'
freQIAf'CY (Hz)

;t h7-i.;i;l.'1Ul!l
( AF-406K)
._ 'l> I ~/r I ~ :;z: cp{. ' }!J;~tt!Jl !l
Bandpass Freq. Control
No tch Band Width Control
® 11~;l: ··b7-
U, "- ·, t-';j; - /:/1'·,7
Phone Jack
Line Switch
SSB···-1:{J·Ji1:1£ 1tl.oj!!;I~/1 A'& l.fr.i'.l.ftf.iO)ViW1:.t oif:jl~/1 A'~~
'.J..'~-tt ot.:11-'.>t:f!!!ffl L1T
0 " 1 / f;<.·711i.-:$t- (500Hz)
l:c-/ f7..·711i.-:$t-
(2.5
kHz , 2kHz, I.5kHz) O)*llfi- h-tt1:.t9iifl~ 'l lH .!l! rtJ ~-tt1<L ·n -I.To
(FIG.4)
CW··· CWO)!ji- r-/ O)l;. {- iifl~ ~-tt of!'il<'.> -C ... JO) -!tl_\ -711i.-:$t --(' To
y ;..-!if;..-?" ~JllJ~ot.:11-'.>t:QO)J!!:\ '/<;..-r /f ::<.(1:. ·- ?> 711i.-?1 -{-4fJtfi!mL,
-C ~ 9170Hz(AF-606Klil40Hz) b• t;SO Hz 1-(' O)iifl;e'j'11f l.!l!-l-:iiURT o.:l:tJr'
-('HT.
• /<;..- 1- · /f::<..P-t.•ffilil:U'IWll~@<soo-1,200Hziif~l v .... ~~~L -c~fli:
ih':lil:* <=t..:of JJ:li'.c -t ?rUT. JJo\ -11 . flll1' l!lt9~T \ -1- - ;..-1: -t 7J-
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91T. ((FIG.5)
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1
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PLL ( AF -606KO)l;.J- ··CW ffi''.}O) I- - / l:PLLr-/r·::z-:$t° -0)7 Y-
7/Jali1:U'ItJ'-ttU.:l:1'1 :. LOCKnt~ili7JtJ '~1: LLOCK 1/::/ 'r-?l
-QJW.#.*TL1 To .:O) LOCK ffi''.}ilitJ-(' :t-:r 1 :t ~l!lii>~ltli'f.l ~-tt-Cft
O) CW fli:'.} !:fiil(.;ff '.}~:jlj:1:L -C~9. /1;<.'!,7.x.- ::J/?'!,l,t\" ?Y7t..:CW
'.ffo{tJ'-('HTo (FIG.7)
• cw~-n:-c, cwra%tJ'Ril*1:t..:o.t71:/.-;..-1-· /{::<.l:ililli: tt~~ ®v
...,~~~LI.To
ePLL7 Y-7/ffi!iltfl:@·:n~~~~L. LOCK1 ;..-:J >r-?l- @tJ'ff.~
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@J-7
;..-::,- -, <- (~ffi'ftt) 0) *-7' 1 *If'. tJ b1 'J' ~\ •!:LOCKtJ'tJ·t rt;T,i: ( T,t
9. *-1'1"if1Tl:LOCK·!iflJ!l:b
1
~:11
1
-,-C•if&tfftl!.O)t iI~ 1:.t9LOCK
1" o.:1::11
1
/)91.T. A.:IJ;G:l.Eli!V(O.IW/SQ) :11
1
ia~-('T. ('it:jjO)~~
/~)
0
10
20
30
40
50
60
1...-:1;-PLL 1--;..-7'::z-?l'lill~11, ~- 1-··7..1 TrtJ'!:'O):f-:J;,-,,;..-1:t..:..,-c\ ·-c
t,;'7;1:j)J(j!L'C\ ·;t-t"O)-('fil!lfl LT..:\ -!: i!r liPLL 7') -7 /l~iJ:Uti:Jlt!l@'/...,
~-rlt.'fJt:J;lnJ\ ,..,1 ,t\ -1:.\tfL -C~H-t.
(FIG.7)
® :9l-llll11~'/7 ·, ~
DC Socket
•
••••
••••
••••
, .... .
( FIG.5 ) CW BAND PASS FILTER
Min
Max
10'
Frequercy(Hzl
(FIG.6) PLL TONE DECODER
7 l o'
F-y ( Hzl
Lock lndocat0<
CW Signal
~nd Pass 1--'-0u"' tou"-t- ...1 Pll
Flit • Tone Decoder
Lock Sign11
Output
Powa Amp . SptokOi'
Free Run Freq. Control
Tone Freq. Volume Control

• All mode active filtering removes interference on the desired signal
and improves readability in CW, SSB, or AM modes.
• The All Mode Active Filter consists of four active circuit stages as
well as low pass and high pass filters for clear reception.
• For CW reception, a four stage, low Q variable frequency band-
pass circuit is included to provide clear CW reception with high
SIN ratio.
• A PLL (Phase Locked Loop) Tone Decoder for noise-free recep-
tion.
• A 9 cm diameter speaker is also included.
CONNECTION:
Power Supply - A power supply of 13.8 VDC (200 ma. min.) is re-
quired for the operation of the All Mode Filter. Connect your power
supply to the external DC socket with the DC power cord supplied.
When using an AC adapter, make sure the maximum output voltage
(with no load connected) is below 15 VDC.
External Speaker - An external speaker (8 ohms) can be connected
to the socket with a RCA pin plug. The built-in speaker is disabled
whenever the external speaker is connected.
Input Signal -Connect a shielded cable with a RCA pin plug to the
input
socket and to the speaker terminals of your transceiver/receiver.
The headphone socket of your transceiver/receiver can be used as a
signal source, but the normal speaker ofyour transceiver/receiver will
be disabled. The output signal level from the built-in speaker of the
AF406K/ AF606K may be somewhat low when the power switch of the
filter is in the OFF position.
Headphones -Connect a
stereo or mono headphone to the Phone
Jack. The built-in speaker of the AF406K/ AF606K is disabled
whenever a headphone is used.
OPERATION:
• AF606K - Select either the Notch, SSS-Bandpass filter, CW
Bandpass filter (Peak filter), or the PLL Tone Decoder mode.
• AF406K - Select either the Notch, SSS-Bandpass filter, CW
Bandpass filter (Peak filter).
• Notch - The Notch Filter supresses "beat interference" on the
desired signal.
(A) Turn the notch frequency control (300-3 kHz) slowly until you
reach the position ~here the interference is reduced.
(8) The bandwidth of the notch filter will narrow as the Notch
control is turned clockwise.
(C) The notch filter is operable with all modes. (SSB, CW, PLL)
Turn both knobs (I) and (2) to the fully clockwise position
whenever you do not desire the notch filter function.
SSB Filter - Low frequency noise or hum (around 50-100 Hz) caus-
ed by a signal on an adjacent frequency can be reduced with the SSB
Filter. The filter consists of highpass and lowpass filters. (2.5, 2, and
1.5 kHz.) Select the proper position according to the level of
interference.
CW Filter - The CW filter is a very narrow bandwidth filter designed
to pass only the desired CW signal. For "ringing" supression, the All
Mode Active Filter employs a four stage low Q bandpass (peak) filter.
A 170 Hz. (140 Hz in the AF606K) to 80 Hz. bandwidth can be
selected.
• Adjust the Center Frequency of the Bandpass Filter Control
(500-1200 Hz variable) and then set the frequency of the received
signal for maximum reception quality. On the other hand, you
may wish to adjust for the desired tone and then peak the receive
frequency of your transceiver / receiver for best reception.
Pll {AF606K only) - When the tone frequency of the CW signal
and the free-running frequency of the PLL Tone Decoder are the
same, a locked signal output is generated in the PLL circuitry and the
LOCK indicator will glow.
The locked signal output keys an audio oscillator which then
reproduces the received CW signal. The PLL reproduced CW signal is
free of interference caused by noise or fading.
• In the CW mode, adjust the Bandpass frequency control to obtain
maximum output of the desired CW signal.
• Adjust the PLL free-running frequency control until the LOCK
indicator is .on.
• Set the mode switch to the PLL position.
• Adjust the volume control and the Tone oscillator frequency
control.
The required input level of the PLL Tone Decoder is I v
(.I
w/8 ohm). (The sound level at .I watt is almost the same as normal
human conversational levels) When the input signal level from your
transceiver/receiver is too low, the PLL will not activate. On the other
hand, the PLL can be activated by unwanted signals or noise when the
input signal level is excessive. Please make sure the output of your
transceiver is adjusted to the proper level.

IC• ·-)IA 3404
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-ii- ---CERAMICCAP AF-406K AF-606K
DAIWA
.-nn'CO .. LTD.
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