coil wire?

[sinclairuser]

just getting my barracuda installed in its box and i would like to ask
do i use coax from unit to coil? or twisted pair?
thanks ally x

[kt315]

...

[sinclairuser]

thanks nice coil!

[hispalba]

Hi
I use this.

[kt315]

thanks nice coil!

not mine it's Deepers 10DD

[bernte_one]

hello hispalba

what is this for a dtector modell baracuda smd?

looks good

[hispalba]

Hello bernet one
Yes, it is a barracuda smd.
Regards

[kt315]

hello hispalba,

what inner diameter is of the tube you used?

regards

[hispalba]

Hello kt315

inner diameter is 40mm

Regards

[sinclairuser]

not mine it's Deepers 10DD

ah i see it looked shack built (and i dont mean that as an insult some shack built stuff ive seen over the years could not be built commercialy due to many factors but are better than any factory could build)
hispalba nice work on that smd barracuda! has that board got q5, switch and associated components?
thanks ally x

[hispalba]

Hello sinclairuser.
It is not installed components Q5,R25,R26,R37,SW1.
Regards.

[hispalba]

Sorry. r26 (270K) not removed of pcb

[sinclairuser]

ok man just wondered
satdaveuk myself and others are going to have a crack at that unknown part if we work it out il let you know it might as well be on your design aswell
ally x
p.s. as for coil wire i have now tried both low loss high gain mil coax and low imp mic cable and both work with no noticeable difference i stuck with the mic cable as its softer the coax is way to stiff!

[satdaveuk]

ok man just wondered
satdaveuk myself and others are going to have a crack at that unknown part if we work it out il let you know it might as well be on your design aswell
ally x
p.s. as for coil wire i have now tried both low loss high gain mil coax and low imp mic cable and both work with no noticeable difference i stuck with the mic cable as its softer the coax is way to stiff!

Hi Ally
I been using RG58 in past project, are any of the cables you mention performing any better far as performance?

Regards

Dave

[Davor]

Capacitance per meter is inversely proportional to the cable impedance, and as far as low capacitance goes, a 100ohm mic cable has less capacitance than 50ohm RG58 over the same length. However, you have to check the microphone cable voltage rating first because it is a PI rig, and you may have arcing.

In my projects (which are not PI rigs yet) I prefer microphone cables as well because of their flexibility, and heat shrinking tubing at the ends to reduce wear.