Fisher VLF 553D help needed.

[kt315]

thank you techstar for the pics. no so good pics enlighten but what we have same we have.

have a nice day

[techstar]

I have done some more tests on the Fisher VLF 553D . The chip supply voltages - and + are all good. I can inject audio signal into receive circuits and it comes through the speaker fine. I have tested all of the chips on my op amp tester and IC tester and they all test good. What should i test next ? . I suspect a bad coil but i am not sure exactly how to prove if the coil is good or bad.

[kt315]

in my hubble buble you need to do global inspection of your board. begin to draw layout.
print big size pic of board and draw traces. you will get full connection pic.
do your job every day by small portions. draw by pensil, by hand.
remember nobody will do this job beside you - not Melbeta, not George, not mr. Foster, not me.
all are in your hands. draw connections of all wires to the board, by colors.
here example with GMT i did.

[techstar]

The board in my opinion is most likely good although i am not 100% sure. I just asked if anyone knows how to prove if this coil is good or bad.

[kt315]

i promised to give to people a special board for coil testing/tuning... but i do not have enough time for all my dream realizations (((

[techstar]

Lol i like your sense of humour!!!!!! very funny!!

[kt315]

funny? ok. let be funny. i showed HOW turn movement influences on the balance.
https://www.youtube.com/watch?v=gVP_E_x-Y5c

[techstar]

I came here for some help kit , all you are showing me is what a great scientist you are.

[SVEN1]

[techstar]

My frequency counter is showing 4.3 khz on the transmit. Still thinking a bad coil.