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Last change-Date 21.06.2013 V 1.3 and V 1.31

TO-LAD-4tr V 1.3 and V 1.31 Filter for Shrthi-1 fro! "ta#le $nstr!ents

D$% instrctions

Attention& if 'o se the T#eOh! co!(lete )it the orientation of the (ots is *alid + $f 'o seother (arts& it can #e that the orientation is !irrored. ,,, clocise/anticlocise.

hat 'o need

1 ctter

2 digital !lti!eter

3 soldering iron 30

4 desoldering (!(

#etter an oscillosco(e

6 #etter fre5enc' conter

sills in soldering and electronics

7 ti!e

About the TO-LAD-4tr:

The TO-LAD-4tr is a ladder Filter s(eciall' designed for Shrthi fro! "ta#le $nstr!ents.

$t contains the co!(lete (oer s((l' 8V/-V& a V9A& the filter nit and the Filter-F" feed#ac

nit.

After soldering 'o !st connect the Filter #oard to the Shrthi !other#oard and do the

ad:st!ents.

Ad:st!ent is *er' i!(ortant and !eans that 'o !st

;1 ne in V 1.31 ot(t *ol (ot

1 set( the *ol!e ith ? ( to 40 )>? .

T#eOh! is not res(onsi#le for da!age to 'or lods(eaer& sondcard& Shrthi "other#oard

and/or a!(lifier.

This is a D$% it& if 'o solder the (arts correctl'& it ill or. @t T#eOh! cant gi*e an'garant' to 'or or.

So& tae a little ti!e& loo and chec the (arts& and !easre the resistors #efore 'o solder ++

License for #ilding theTO-LAD-4tr

%o can se the sche!atics to #ild the Filter on Vero#oard on or 'or on !ade

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Ce in Version V 1.31

1 no all Vales are good reada#le.

2 e ha*e i!(le!ent a ne (ot for ot(t *ol!e. Co 'o can ad:st the lodness & or

3 'o can #ridge the (ot for !a=i!! lodness if 'o dont ant to ha*e a Vol!e (ot.

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The solder instrction V 1.31 is nearl' the sa!e lie in V 1.3 #t ith three changes.

First& there is a 10) *ol (ot& second& e re!o*ed one 10 ) resistor and third& e re(lace a 1) oh!against a 220 oh!& so e redce the ot(t *ol!e.

The rest is nchanged.

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older Version V 1.3

We hope this manual is nearly bugfree, but, double-check all A!T "AL#$%

&ith the '(OA!D )!O* T+$ TO, if you are unsure you hae solder the

right parts

The part alues in the Layout '(OA!D )!O* T+$ TO' are .//0 tested and

&orks 11

here is the board from the top ie& 23OO* T5

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Attention

On the ere is the (ictre. 9ontol that 'o solder the correct (arts ++

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Solder the different ca(acitors .

First 4 = 100 (F 9a(acitors.

Then one 10 (F ca(acitor in the (oer s((l'

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To 220p) ca(acitors here near $9 3 pico )arad

One 220 n)ca(acitor here near $9 2 nano )arad

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Co 1 = the .// n) ca(acitors for the $9 (ea #locing.

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And here the co(le ca(acitors 720 nF

Co the resistors + 3 = 100 ) Oh! !etall 1 code #ron& #lac& #lac& orange& #ron

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Co 7 = 10 ) resistors 1& code #ron& #lac& #lac& red& #ron

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Solder si= = 17 Oh! here & code #ron & gra'& #lac& red & #ron

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>ere G = 1 ) resistors 1 & code #ron& #lac& #lac& #ron& #ron

To decrease the output olume from 6 peak to peak to . peak to peak, reduce !7 from . 8

to 66/ ! With . 8 your soundcard direct in can be oerload

3 = 1" Oh! 1 resistors here& code #ron& #lac& green& gold

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6 = 2&2) Oh! resistors here& code red& red & #lac& #ron& #ron

1 = 2& ) oh! here& code red & (r(le& #lac& #ron& #ron

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2 = 220 O>" here code red& red& #lac& #lac& #ron

o(tional 1 = 22...4 ) Oh!. This is for !odding. $f 'o dont ant to !od the Filter& dont solder it.

And lea*e the s(ace free.

One 2 ) Oh! resistor here. 9ode red& #lac& #lac& #ron& #ron

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One 300 ) Oh! here code orange& #lac& #lac& orange& #ron

One 330 ) Oh! here code orange& orange& #lac & orange& #ron

One 33 ) Oh! here code orange& orange& #lac& red & #ron

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3 = 4 ) Oh! here code 'ello& (r(le& #lac& red& #ron&

1 = 67 Oh! here code #le&gra'& #lac& gold #ron

3 = 4& ) here code&'ello& (r(le& #lac& #ron& #ron

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The (oer s((l'

For the (oer s((l' 'o need

1 91& a 10 F tantal! ca(acitor& attention &chec the

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4 non (olarised ca(acitors 4& F here Co (ls or !ins orries.

7 = 2C3G04 C

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Three Transistors 2C3G06

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9onnectors here

%o need

2 Cetri 6&3 Adio

1=7

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9hec the (oints shon here& red 8V& #le - V& green is grond.

Ti(( so!e 70 ha*e onl' 4&72... 4&G3 V

This is not a great

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Co the $9 (lace!ent. e sggest 'o to tae socets for the $9s.

%o need

2 = L" 1300C 16 (in

2 = TL04 14 (in

1 = 9A 3046 14 (in

1 = TL 02 7 (in1 = LT 104

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ongratulations, you hae built the TO-LAD-4tr

if the oscillator input too high, the filter loses its resonance (e a&are as this can be ery

important in regard to e?ternal signals

h' set ( the linearit' J This is *er' i!(ortant for the co!(lete sond.

H=a!(le. $f the ct fre5enc' is fi=ed to 200 >K& all Cotes a#o*e 200 >K are filtered !ore and

!ore.. One octa*e higher& 'o get the half *ol!e& 2 Octa*e higher it can #e that 'o hear nothing.

The linearit' ad:st!ent let the filter !o*e in its fre5enc' lie a nor!al oscillator.

$n fact 'o can se the Filter as an oscillator >igh resonance& no oscillator signal to (la'

notes.

@t this onl' & if the filter do#les its fre5enc' fro! one octa*e to the ne=t.

The ladder filter shold #e linear fro! 40 >K ( to ..6 )>K. The sond for!ing ha((ens #eteen

40 and ..6 )>?. On 10..20 )>K 'o dont hear !ch changing.

%ome &ords to the ad;ustment hile design the sche!atics and #ilding the filter $ noticed thatthe resonance *ol!e is loer if the Oscillator *ol!e is higher.

$f the in(t signal is too lod& 'o #eco!e no filter effect. For this $ ha*e #ilt in the Vol!e (ot.

(ut default setting is : "olume OT @ to *a?imum 11 %o that you hear the sound &ith

resonancy /

#sing e?ternal signals )ilter (OBAs $ said& if 'o se e=ternal signals& ad:st the HT in

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Ese

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A special feature is the )ilter )* The )ilter output controls the ut-off freCuency

T: !esonance, )*, utoff and the oscillator signal &ork together

Firstl' tr' this. Tae onl' one oscillator& ct-off to 30& no resonance.

Ese in the "odlations "atri= N OFFSHT- A"OECT -9V1

9V1 s the control channel. Offset is a D9. The D9 controls ith A"OECT the feed#acof the F".

$f 'o no increase the A"OECT Iange 0..63 negati*e *ales dont or ++& 'o add

o*ertones in the s(ectr! of the oscillator. ors #est if ct-off is not fll o(en.

Co add Iesonance & the sond changes fro! !ore o*ertones to hard distortions.

So!eti!es less is !ore.

;;;; h' negati*e *ales dont or on offset JJ 9V 1 gi*es ot a

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@O" - Date 23.04.2013 re* 2

Ladder Filter TubeOhm

Part Description Menge Farnell Reichelt

1N4001 D1 1 1N4001

Buchse 9 V 1 >H@ 21

7805 Spannungsregler 1 a 7805

7905 Spannungsregler 1 a 7905

!"1054 Spannungs#an$ler 1 !" 1054 %N8

10 uF tantal 1 "antal 10&'5

100 uF (l)o 4 Ra$ 100&1*

10 p+ )era,i) 1 -er)o 10 p

''0 u+ (l)o ' Ra$ ''0&.5

100 nF % 15 /7R'5 100N

100 nF % 4 M-S'5 100 N

8'0 nF % ' 18548*' M-S4 *80N 22

''0nF % 1 -er)o ''0nF''0 pF % )era,isch ' -er)o ''0 p

47 uF (l)o NP 4 123667G "on 47&*.

100 pF % )era,isch 4 -er)o 100 p

1 ) R 9 Metall 1)

' ) R 1 Metall '-

18 ) R * Metall 180)

47 ) R . Metall 470-

''0 R . Metall ''0

'' ) R * Metall''0)

47 ) R . MPR 470)

1 M R . MPR 100M

'7 ) R 1 Metall '70)*8 R 1 Metall *80

10 ) R 8 Metall 100-

.. ) R 1 Metall ..0-

100 ) R . Metall 100 -

..0 ) R 1 Metall ..0 )

.00 ) R 1 Metall .00 )

" .90* "ransistor . 'N .90*

" .904 "ransistor ,ache$ 8 'N.904

5 ) Poti 1 *4350)

50 - Poti ' *4350)

10 ) Poti 1 *4310-NF uchse Neutric ' 416G244

Dil 14 Soc)el . "9-222-14-03-F1 S 14

Dil 1* Soc)el ' S 1*

Soc)el 8 pol 6% soc)el ' S 8

"! 074 6% ' "! 074 D6!

"! 07' 6% 1 "! 07' D6P

!M 1.700 6% ' !M 1.700 D6!

%.04* 6% 1

8 Pol Buchse P+ostenuchse 1

P%B "!D4tr "ueh, 1

"

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Sche!atics To-LAD-4tr V 1.31

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Sche!atics To-LAD-4tr V 1.3

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"odding

Filter standalone V ithot Shrthi !other#oard and s(ecial 1Volt/O9T 0..10 V