BARACUDA-Legend-1

[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.

[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

[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.

[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.

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

[Wilson]

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

[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]

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

[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

[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.

[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.

[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)

[Wilson]

Hello Bernte_one you have picture of the waveforms of your barracuda to post?
Thank you.

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?

Hello Bernte_one you have picture of the waveforms of your barracuda to post?
Thank you.

thanks

[Wilson]

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.

Hello old car, the figure you said that red is pin 6 NE5534 I forgot to identify the value of resistor damper, I used the original value 330homs ok.
The last picture refers to pulse the MOSFET on the coil reaches around 246VPP.