Bulgarian 'PULSE STAR' (... close to Legendary one)

[mohandes]

hi fung
first set ne555 like oscillogram(fcy 120hz and pps 150 to 400mks)
next set all,carefull you should be have waves in a,b,c points in 4053 like oscillogram and ne5534 too.if one of them incorrect you have problem.now look at the 55534-6 wave, should be nulling and set pin 6 on 0volt then set the figure by res or delay.( georgi say on -0.2volts)
when you adjust all parts of oscillator should adjust all tl062 like that georgi say.
next your detector is perfect.
your pcb is very perfessonal.

[fengzhai01]

I observe the waveform, also appears to be normal, also can detect metal, but the voice is not stable, identification of don't know how to adjust

[mohandes]

I observe the waveform, also appears to be normal, also can detect metal, but the voice is not stable, identification of don't know how to adjust[/QUOTE]

thanks
please put the pics for pin6 ne5534 and pin3 ne555.(use two channel of scope together)
say me about the coil ,res parallel and all set you on oscillograms.
regards

[georgi.g.zhelev]

SEE !
02-26-2010, 10:38 AM
georgi.g.zhelev
Senior Member Join Date: Aug 2009
Location: BG
Posts: 127

Hi! 1. DELAY > good sensitivity and stable sound .
2. NE 5534 > pin 6 > -0,2 V

PULS STAR-G
HI, ALEXIMUS!Hi, tuning is done in the absence of metal in the area of the coil!
1.RV7, RV8 obtain TP3 = 0volt. dual beam oscilloscope after the tone
the output of U6a, b. (TP1,TP2)
2. ZERO push and relax, RV11; indicator "discrimination." 0!
3.RV9 ;TP5 around 0.5 .... 06v (maximum sensitivity and stability)
RV11, replaced the potentiometer (see photo PULS STAR-G front panel) is a indikator RV11.
SUCCESS!

P POWER SUPPLY FROM BATERY!!!!Hi!
2. NE 5534 > pin 6 > -0,2 V
1. DELAY > good sensitivity and stable sound .

"after I adjust the output is zero, then adjust the DELAY when the output is completely changed, is not zero"> This is normal !

[ATTACH]26111[/ATTACH]Hi, everybody, I can't adjust the stability of the sound, the sound is very messy, the NE5534 (pin6) to adjust how many v?? DELAY should be in the position of maximum or minimum, and then put operation amplifier zero

[georgi.g.zhelev]

SEE HЕРЕ !

[fengzhai01]

Everybody is good, what kind of friends can also give some more carefully adjusted method? For example, 1 (...). 2 (...) 3 (...) , there is no help, maybe I can't finish the work

[georgi.g.zhelev]

PS

Everybody is good, what kind of friends can also give some more carefully adjusted method? For example, 1 (...). 2 (...) 3 (...) , there is no help, maybe I can't finish the work

Hi, fengzhai01! Please show your schemes to PULS STAR-G . (the diagram that you have done your PCB) sorry for my bad english.

[fengzhai01]

[fengzhai01]

NE5534---pin6 waveform

[kt315]

damping resistor value vs the waveform pin6

[mohandes]

I observe the waveform, also appears to be normal, also can detect metal, but the voice is not stable, identification of don't know how to adjust[/QUOTE]
mr fung
we have same problem.
tell me you make your pcb in original or Aleximess schematic?
mr georgi maybe problem in ne555, in original you use kt117 but i make like alex,maybe i am right?
please come hear
http://www.geotech1.com/forums/showt...c&goto=newpost

[porkluvr]

Do you see how the pins on C13 are connected in the schematic and also on the PCB? Those connections do not go according to any NE5534 spec sheet that I have seen.

Your rx signal is ringing, which (to me) indicates that the schematic connections are probably incorrect. If I were you I would try moving the C13 connection from pin-1 over to pin-8 to agree with the compensation connection in the spec sheets. The compensation capacitor should be between pin-5 and pin-1, or that's what the IC manufacturers suggest anyhow. Try it and see.

[mohandes]

Do you see how the pins on C13 are connected in the schematic and also on the PCB? Those connections do not go according to any NE5534 spec sheet that I have seen.

Your rx signal is ringing, which (to me) indicates that the schematic connections are probably incorrect. If I were you I would try moving the C13 connection from pin-1 over to pin-8 to agree with the compensation connection in the spec sheets. The compensation capacitor should be between pin-5 and pin-1, or that's what the IC manufacturers suggest anyhow. Try it and see.

hi i do it
between pin 1&5 and 5&8.
not have more change.is possible the ne5534-6 related to the flyback voltage of coil,for psg we need 500-600volts and my coil can make it at the maximum 480 volt. i am so tired.

[mohandes]

i use two cap 10pF between them you say
my wave of 5534 like Feng wave but the ripple more.
i try again

[fengzhai01]

I have change the NE5534 is OP27, other unchanged, that there was no ringing waveform, looks good, adjust the output is zero, but still is not enough stable, sound is a bit messy