s-1

[Pompey]

To adjust GEB first you have to get correct fase shift by trimer ,which moves the fase.When you got the correct fase shift you will be able easy to adjust the GEB.I made S-1 two years ago and everything works.

[ristici]

thank you very much!

can you explain me how to adjust fase shift? i have make s1 detector but i don't know how to adjust them that all work fine. can you help me?

how to adjust three trimers on pcb? for what is each of them?

best regards

[maikl]

Hi ristici. First: whether functioning PCB? Are the coils set to zero? On this link you have more details for the construction http://www.geotech1.com/forums/showt...ighlight=sasho

[ristici]

pcb is ok but my DD coil is not good, i must make new one, OO. i have read this tread maikl but i'm not much more smarter.

how to set coils to zero? the smallest possible amplitude on 5532 pin7? can you explain me that in details?

then i want to know how to adjust correct fase shift and GEB

[maikl]

ristic I have the impression that you have no knowledge in electronics. Perhaps it is better to find, someone who knows. In this PDF document you have to be balancing - nulling coil. C1 is not putting. C1 serves as a further balancing after watering the epoxy resin and maybe in your case will not be 47pF...

[ristici]

maikl thank you very much for this great info!!!

now i only need to know how to adjust phase shift

best regards

[maikl]

You have to scheme trimmer potentiometer r1 = 20K

[ristici]

i know that, but how? i need procedure

what is T.P. points on pcb?

best regards

[Pompey]

By moving this trimer step by step in the same time you have to turn ground pot left or right and find the place where you will be able to adjust ground.This is easiest way to explain how to get the correct phase.The other important thing is to set rx in rezonance which differs from Tx about 70 - 100 Hz.If Tx is set to 9khz -Rx must be adjusted to 8.9 - 8.92 khz.

[WM6]

what is T.P. points on pcb?

Usually T.P. mean test (measuring) points.