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G8MNY > TECH 25.08.25 16:02l 148 Lines 7356 Bytes #8 (0) @ WW
BID : 39510_GB7CIP
Read: GUEST
Subj: CW "K" pip tone unit
Path: JH4XSY<N3HYM<VE3CGR<VE3TOK<IR0AAB<I0OJJ<I3XTY<IZ3LSV<ED1ZAC<GB7CIP
Sent: 250825/0658Z @:GB7CIP.#32.GBR.EURO #:39510 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (Updated Jan 10)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
This is an add on for anyone who wants an optional automatic CW "K" PIP tone
after each over. This used to be popular for short SSB overs under QSB/QRM
conditions like during contests, as it stops doubling etc. & in my experiance
actually speeds up the contact with less contest oriantated stations.
Other Morse letters are possible, but not exceeding 9 time slots that this
circuit gives, see REPEATERS below.
It has an internal PP3 battery to run the unit while on Tx, which is very
lightly trickle charged from the PTT line on Rx to maintain the battery.
SCHEMAIIC
ﾚﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄｿ
ﾚﾄ<ﾄｴPTT Triggersﾃﾄ<ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ<>PTT
ｳ ﾀﾄﾄﾂﾄﾄﾄﾄﾄﾄﾄﾂﾄﾙ ﾚﾄﾄﾄﾄﾄﾄﾄﾄｿ ｳ
Offｳ On ｳ ﾃﾄﾄﾄ>ﾄﾄｴPTT Holdﾃﾄ>ﾄﾙ
Trigｳ TrigｳReset ｳCount ﾀﾄﾄﾄﾄﾄﾄﾄﾄﾙ ﾚﾄﾄﾄ>K LED
ﾚﾄﾄﾁﾄｿ ｳ ﾚﾄﾄﾄﾄﾁﾄﾄｿ ﾚﾄﾄﾄﾄﾄﾄｿ ﾚﾄﾄﾁｿ ﾚﾄﾄﾄﾄﾄﾄｿ ﾚﾄﾄﾄﾄﾄｿ
ｳ27Hzｳ ﾀﾄ>ｴRipple ﾃﾄﾄ>ﾄｴ Code ﾃﾄﾄ>ﾄｴAF ﾃﾄ>ﾄｴ Tone ﾃﾄ>ﾄｴTone ﾃﾄ>Mic
ｳOSC ﾃﾄﾄﾄ>ﾄﾄﾄｴCounterﾃﾄﾄ>ﾄｴDiodesｳ ｳOscｳ ｳFilterｳ ｳLevelｳ
ﾀﾄﾄﾄﾄﾙ ﾀﾄﾄﾄﾄﾄﾄﾄﾙ ﾀﾄﾄﾄﾄﾄﾄﾙ ﾀﾄﾄﾄﾙ ﾀﾄﾄﾄﾄﾄﾄﾙ ﾀﾄﾄﾄﾄﾄﾙ
Features include an LED showing PIP tone is armed (lit during Tx overs) & a "K"
LED showing the K leaving.
CIRCUIT
ﾚﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄﾄｴ>ﾃﾄﾄﾂﾄﾄﾄﾄﾄﾄﾂﾄﾄﾄﾄﾄﾄｿ MIC RIG
=== Hold hi \ｳ R7 ｳ ｳ D8 _ｳ_ _ｳ_PIP ｳ PTT PTT
ｳC1 for K T2ﾃﾄﾄﾄﾄｿ ｳ R14 ｳ /_\ <�/_\LED1 ｳ ｳ ﾃﾄﾄｿ
R1 e/ｳ R6 === C4 ｳ R15 D9ﾃﾄﾄﾄﾄﾄﾄ)ﾄﾄﾄﾄﾄﾄ)ﾄﾄ)ﾄﾄﾄｴ R25
ｳ ｳ ｳ ｳ ｳ +9V ｳ ｳ R22 ONﾀo/o oﾄﾙ ｳ
ﾃﾄR3ﾄﾂﾄﾄﾄﾄﾄﾄﾄﾁﾄﾂﾄﾄﾄﾄ)ﾄﾄﾄﾄ)ﾄﾄﾄﾄﾄﾄﾄﾁﾄﾄﾄﾄﾄﾄﾄﾄﾄ)ﾄﾄﾄﾂﾄﾄﾄﾄ)ﾄﾄﾄﾂﾄﾄﾁﾄﾄﾂﾄﾄﾄﾄo/o oOFF ｳ
ｳ ｳ/e ｳ ｳ ｳ ｳ ｳ/e ｳ +ｳC10 ｳ SW1 ｳ ｳ
ﾃﾄﾄｴT1 ｳ ﾃﾄﾄﾄﾄ)ﾄﾄﾄﾄﾄﾄR16ﾄﾄﾄﾄﾄﾄﾄﾄﾁﾄｴT5 ｳ === ｳ ﾃﾄｴ<ﾃﾄﾄﾙ
ｳ ｳ\ ｳ ｳLongｳStart K ___IC2 ｳ\ PTT ｳ _ｳ_ ｳ +ｳ D10
ｳ ｳPTT ｳ ｳ ﾃﾄﾄﾄﾄﾄﾄﾄﾄｳ1 A\4011 ｳO/P ｳ ｳ 9v ﾄﾁﾄ
=== ｳStart ｳ ｳ R8 ｳ2 3)oｿ R17 ｳ/ ﾚﾄﾄﾄﾄﾄｴ Batt ﾂ
ｳC2 ｳReset ｳ ｳ _ｳ_ ﾚﾄR10ﾄｳ____/ ｳ ﾃﾄﾄｴT6 _ｳ_ ｳ PP3 ｳ
ｳ ｳ ｳ ｳ ﾃﾄR11ﾂﾄﾄﾄﾄﾄﾄﾄﾄﾙ ｳ ｳ\e \_/�>K ｳ _ｳ_
ｳ ｳ C3 ｳ ｳ === ｳ ____ CW R18 ｳ ｳ LED2ｳ
ｳ ｳ ﾚｴﾃﾂﾄﾄﾄﾄ)ﾄﾄﾄﾄ)ﾄﾄR5ﾄﾄﾄｴC5 ﾃｳ5 B\ Clock ﾃﾄﾄﾄﾄﾙ R23 ｳ
ｳ ｳ ｳ ｳﾚﾄﾄﾄﾁﾄﾄﾄｿｳ ｳ ｳｳ6 4)oｿ _ｳ_ ｳ ｳ
R2 ｳ ｳ ﾀｳ14 16 3ｳﾙ D1 ｳ27Hzﾀｳ____/ ｳ ｳ/ ｳ
_ｳ_ ｳ ﾃﾄﾄﾄｳ13 2ｳｴ>ﾃﾄｿ ﾀﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾙ ﾚﾄﾄﾄﾄﾄﾄﾄｴT4 ｳ
ﾃﾄ)ﾄﾄﾄｳ15 4ｳﾄｴ>ﾃｴ K _._ ___+14 ｳ ｳ\e ｳ
ｳ ｳ ｳ 7ｳｴ>ﾃﾄﾅﾄﾄﾄﾄﾄﾄﾄﾄﾄｳ8 C\ R19 _ｳ_ ｳ
R4 ｳ ｳ IC1 1ｳﾄｴ>ﾃｴ Morse ｳ9 10)oｿ ｳ ｳ/
ｳ ｳ ｳ4017 6ｳｴ>ﾃﾄｴ ﾚﾄR12ﾄｳ____/ ｳ ﾃﾄR20ﾄﾂﾄR21ﾄﾂﾄｴT3
ｳ ｳ ｳ 9ｳﾄｴ>ﾃｴ ﾃﾄR13ﾂﾄﾄﾄﾄﾄﾄﾄﾄﾙ ｳ ===C7 ｳ ｳ\e
ｳ ｳ ｳ 8 11ｳｴ>ﾃﾄｴ === ｳ ___-7 AF ｳ ﾀﾄﾄﾄﾄﾄ)ﾄﾄﾄｴ C9
ｳ ｳ ﾀﾄﾄﾂﾄﾄﾄﾄﾙ D7 ｳ ｳC6 ﾃｳ12 D\ Osc ｳ AF === VR1<ﾄﾄｴﾃﾄR24ﾄ>MIC
ｳ ｳ ｳ R9 ｳ ｳｳ13 11)oﾂﾄﾄﾄﾙ Filter C8ｳ ｳ O/P
ﾀﾄﾁﾄﾄﾄﾄﾄﾄﾁﾄﾄﾄﾄﾄﾄﾂﾄﾄﾙ ｳ1kHzﾀｳ____/ ｳ ﾃﾄﾄﾄﾙ Level
Ripple Counter _ｳ_ ﾀﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾙ _ｳ_
COMPONENTS
C1,2,4,7,9. 10n R1,2,3,5,6,10,11,12,13,15,16. 390K
C3. 10p R7,17,18,25. 10K
C5. 47n R8. 1M
C6. 1n2 R4,9,14,19,20,21. 47K
C8. 4n7 R22,23. 470R
C10. 10uF R24. 100K
D1-10 1N4148 VR1. 10K
IC1 4017 Cmos Ripple LED1 Red
IC2 4011 4x Cmos Nand LED2 Yellow
T1,2,5. Small signal PNP SW1 Double pole C/O
T3,4,6. Small signal NPN
HOW IT WORKS
The On/Off switch, switches power & also re-routes the PTT line via steering
diode D9 (in case the battery is flat). A light trickle charge for the battery
via R27 & D10 is taken off the PTT line when on Rx whether the unit is switched
on or off & is low enough current to be suitable for most dry cells.
When Mic PTT is low the LED1 lights via R22 & briefly pulses on T1 via C1 & R1
with C2 & R2 providing a power up pulse, T1 resets the ripple counter IC1 ready
for the 1st CW clock pulse. The Mic PTT low also turns on PTT drivers T5 via
R15 which turns on T6 via R17/18 to repeat the PTT condition to the Rig.
On release of the Mic PTT a long +ve pulse is feed into Gate A of IC2 via R7,
C7 & discharged by R8. This enables the oscillator IC2 Gate A & B. With C5 &
R10, R11 it oscillates around 27Hz which forms the "dot time" for the CW.
The CW CLOCK is filtered (kept clean on power up etc) with R5 & C3 to feed the
ripple counter IC1. The "Q0" pin 3 output line is low from 0-10 count & is used
to drive T5 via R16 for PTT as with the Mic while the "K" Pips are generated, &
it also drives T2 via R6 to maintain the long CW CLOCK gate ON pulse.
Ripple outputs "Q1" to "Q9" Pins 2 4 7 = dash, 10 = gap, 1 = dot, 5 = gap,
6 9 11 = dash, are diode gated D1-D7 & R9 to make up the timings for the "K".
The +ve CW signals control the AF oscillator in the same way as the CW CLOCK.
The AF oscillator is made from IC2 Gate C & D, & with the C6 & R12/13, it
oscillates around 1kHz.
The square wave AF output from IC2D drives T4 via R19 to light the LED2 via R23
to indicate "K" is going out, & also feeds the AF to the Butterworth filter
R20/21 & C7/8 to T3 emitter follower, to shape the tone to a near sine wave.
T3 is only biased on by the mean DC level of the TTL output when present. T3
feeds the output level setting pot VR1 which in turn feeds the K tones to the
Mic AF line via a DC blocking Cap C9 & a high value attenuator R24.
IN USE
This is not needed on FM as the squelch tail tells the end of overs quite well.
But for weak fading SSB signals or under heavy QRM it gives a very clear &
unambiguous end of the over, that like all CW can be easily heard compaired to
a voice ending.
REPEATERS
Lots more letters are possible for repeaters etc. without going into the
complexity of computers & Pics etc. Here with just a few more diodes & a pull
down R per letter. But don't use more that 2 diodes in series to get a letter!
Possible letters are... A,B,C,D,E,F,G,H,I,K,L,M,N,R,S,T,U,V,W,5.
Letters that are NOT possible are.. J,O,P,Q,X,Y,Z,1,2,3,4,6,7,8,9,0
ﾚﾄﾄﾄﾁﾄﾄﾄﾄﾄﾄﾄｿｳ
ﾀｳ14 16 Q0 3ｳﾙﾚﾄｴ>ﾃﾄﾄﾄﾂﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ>H ....
ﾄｳ13 Q1 2ｳﾄﾙ ﾚｴ>ﾃﾄﾄ)ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄｿ
ﾄｳ15 Q2 4ｳﾄﾄﾄﾁﾄｴ>ﾃﾄ)ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄ)ﾄﾄ>D _..
ｳ Q3 7ｳﾄｴ>ﾃﾄﾄﾄﾄﾄﾅﾄﾄﾄﾄﾄｴ>ﾃﾄﾄﾄﾄﾄﾄｴ ｳ
ｳ Q4 10ｳﾄﾄｴ>ﾃﾄﾄﾄﾄ)ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄ)ﾄﾄ)ﾄﾄ>L ._..
ｳIC1 Q5 1ｳﾄｴ>ﾃﾄﾄﾄﾄﾄﾅﾄﾄﾄｴ>ﾃﾄﾄﾄﾄﾄｴ ｳ ｳ
ｳ Q6 5ｳﾄﾄｴ>ﾃﾄﾄﾄﾄ)ﾄﾄﾄﾄﾄﾄﾄﾄﾂﾄﾄ)ﾄﾄ)ﾄﾄ)ﾄﾄ>U .._
ｳ4017 Q7 6ｳﾄｴ>ﾃﾄﾄﾄﾄﾄﾅﾄﾄｴ>ﾃﾄﾄﾄｴ ｳ ｳ ｳ
ｳ Q8 9ｳﾄﾄｴ>ﾃﾄﾂﾄﾄ)ﾄﾄﾄﾄﾄﾄﾂﾄ)ﾄﾄ)ﾄﾄ)ﾄﾄ)ﾄﾄ>K _._
ｳ ｳﾚｴ>ﾃﾄﾄ)ﾄﾄ)ﾄﾄﾄﾄﾂﾄ)ﾄ)ﾄﾄ)ﾄﾄ)ﾄﾄｴ
ｳ 8 Q9 11ｳﾁﾄｴ>ﾃﾄｴ ﾃﾄｴ>ﾃﾙ ｳ ｳ ｳ ｳ ﾃﾄﾄ>B _...
ﾀﾄﾄﾄﾂﾄﾄﾄﾄﾄﾄﾄﾙ ｳ ﾃﾄﾄｴ>ﾃﾄﾙ ｳ ｳ ｳ ｳ
RK RH RU RL RD RB
A multi way logic selector etc, to select the letter before the AF osc to
give... No modulation = no CW, K = OK, B = On Battery Power. L= Low Mod,
H = High Mod, U = Freq Up, D = Freq Down, all depending on Modulation & FM
Discriminator DC output etc..
Why Don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
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