BARACUDA-Legend-1

[bernte_one]

hello pnp
watch your step
is it possible that you wear work protecting shoes with metal
an if you swin right that your right foot is in front (next to coil)

[pnp007]

i have a problem with my barracuda. when swing the coil to the right beep will occur, swing to left no beep. When i change the wire beep sound at left side.

[Old cart]

Actually the last waveform (red one) is the best damped. This shows also a different yellow waveform and the settings have been changed so it is a little confusing. Looks like something less than 350 ohms would be about right.

[bernte_one]

hello wilson

nice diagrams
if i understand right 420R iss the best value for your coil
or how would you interpret the waveform form pulse signal?

thanks

[Wilson]

Mohandes, try to answer your questions.
1 - I use the NE5534
2 - Logically egistem formulas, calculations and so on. Calculations are complex, usually almost all the forum build their reels based on information obtained, making mistakes and successes to get a good result. I believe that the forum has people who have knowledge of calculus ok.
3 - I am attaching some waveforms with different values of the damper resistor, even with different values barracuda works by varying the depth of capture of the target. I used a potentiometer 3W 1K resistor in place of the damper to show you how you can vary the waveform on pin 6 of the NE5534.
You're wasting your time, look for other problems in the circuit since it has no sound played ok.
If the waveforms are not similar to those of the builders of barracuda in this forum, please show me. thank you

[mohandes]

my friend wilson
look at my coils , seems ok
how can i calculate the MANUFACTURE voltage by coil?can you say me (have a formula)?
do you use op27?
can i see your coil wave?
thanks

[Wilson]

Coil built with lid, tubes and connections 3/4 "PVC for residential use. This is an example of a possible assembly.

[Wilson]

Mohandes, my coil is constructed as illustrated below, appreciate if some friend of the forum can help this information because it may have some variations.

[mohandes]

Mohandes, this other picture you sent looks weird, the pulse generated in IRF9640 "12.8VPP" coil is connected?
In my barracuda pulse reaches 200VPP.


[ATTACH]26243[/ATTACH]

Hi wilson
max voltage is 135volt p-p.
my coil is 461mkH and 2.1 ohm , so what is the problem?
can i use tel cable for coil or cable electical, like this ?
thanks

[Wilson]

Mohandes, this other picture you sent looks weird, the pulse generated in IRF9640 "12.8VPP" coil is connected?
In my barracuda pulse reaches 200VPP.

[Wilson]

Hello Mohandes, keep the IC NE5534 it works well. In the picture you sent a waveform and PP voltages are correct. Fix your attention on the following stages.

[mohandes]

look at this

http://javanelec.com/search.aspx?s=op27

please tell me best of the kind of op(GP or GS or....)
thanks

[mohandes]

Hi my friends
i think tired you. but please change your op27 to ne5534 and show me the wave(ne5534-6)

I have this problem in psg detector too.
please tell me equvalent for ne5534 that i use in detector(all pins same together)

i measure all point that you say all are ok!!!
so i change 40106 and look at the ne5534-6 and dont change.then i chang all bf24b to bf256 again not change BUT all point that you say ok (i measure all and were +5 & -5 volt and 650hz)

SO:
i think ne5534 not good but op27 is the best.

[Wilson]

Hello Mohandes, delay pulses 1 and 2 are really 512mVPP with the Q3 and Q4 fets no commute and no signal passed to the next stages. May be the cause of the lack of sound. Check the voltages as shown below if it is correct replace the IC CD40106.

[Wilson]

Hello Mohandes, in post 909 which peak value of the pulse delay "blue". What was the scale division you used channel 2(X10 ou X1) "200mV or 2V", this pulse delay has to be around 4.5 to 5 volts peak. On the side of the screen of the oscilloscope indicates Vpp channel 1 8.15 VPP OK. Channel 2 512mV is not the correct value is close to 5Vpp. Check the IC CD40106 and its connections.