Delta Pulse

[kt315]

uncorrect i think. must be approx 45us. you have to check... op lala i can't use my schematic
be cause i do not see your board to answer right.

[Carlos]

I never saw this configuration of the CD4538 as monostable and the outputs marked with TR4 and TR5 I observe a square wave of 3uS
Carlos

[kt315]

ok. give pic of C5 i could see the value.

[kt315]

also i think you do not set a knob of timing on your scope in fixed position. thats why you get wrong width.

[jinbiao]

The DP I made was field tested with a 30 cm coil. The ground reaction is very strong. GB adjustment is invalid. is this normal? The test site is a laterite mineralized area with gold deposits.

[wyl123]

Hello, what is the best coil parameter for dp, is that “fuse” chart accurate?

[kt315]

I never saw this configuration of the CD4538 as monostable and the outputs marked with TR4 and TR5 I observe a square wave of 3uS
Carlos

this configuration gives sure equal SAMPLE WIDTH for both TR4 and TR5. we need sure symmetric widths.

[kt315]

good shell for your winter project https://www.ebay.com/sch/i.html?_fro...t+Case&_sop=15
https://www.banggood.com/Electronic-...l?rmmds=search

[kt315]

pcb back side mirrored, as you see it

[kt315]

I do not Need a Bara any more.

I want to build a detector that finds a 1Gr gold nugget at 70cm depth

me and Andi want more depth on 1g of gold. 70cm. ok we can tune DP on this work.
tune FIRST DELAY to its minimal 15us. change R7 to 820-910pF. R7 to 7.5k. decrease R8 and C5 to decrease a STROBES' WIDTH to 20-25us.

[kt315]

tune DP to 300pps. change C1 to 10nF and R1 to 160-180k.

[kt315]

[kt315]

[Lam-part]

Welcome as a new user. I was interested in the delta project and why would I have a question about which version of Delta is the deepest? BDP 2010, s3 + or any other? I mean the range on the frame 1x1m or more.
A few days ago I saw on the forum http://www.geotech1.com/forums/attac...2&d=1409265239 this version of Lord kt315. I liked visually, and how about the ranges?
Can you ask for the scheme of this version outsiede? Where exactly I saw the photo on the forum now I can not find. Which version of the delta is the deepest? I am interested in the ranges on the frame 1x1m or more. Why are not there too often ranges given for individual versions?

[kt315]

the depth you asked is in direct connection with tx PULSE WIDTH. if you set it at minimal value you get minimal depth, if you set
maximal value 500 us you get maximal depth.