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Works good now to about 5-6" not very sensitive to ladies thin gold rings or tiny objects.
Probably why I was not impressed with the C&G VLF/TR Disc cat series back in the 1970's.
But, will say, the TR/TR Disc Tomcat I also have is much better.
Replaced the Electro. Caps and the voltage regulator as my first step, which is seen in the first picture.
Then started replacing and testing parts as I went along.
Still some parts I didn't replace, didn't finish replacing the resistors. Mostly caps and one IC LM301, that haven't been replaced yet.
Has a second threshold below the main one, if you can set it right on edge. Performance is slightly better.
Had a Eldorado Umax that had the same sub-threshold, barely audible. But, was there. The Bobcat sub-threshold is as loud as the main threshold. You can hear the difference in tone and clarity.
Still have some scratchiness in the volume control from about half to 3/4 rotation, no audio. Threshold audio begins about 3/4 to full. Changing to a brand new pot did not solve the problem.
Still trying to find out why the detector threshold drift from being heard to not being heard. Originally you would have to press the retune button every 10 seconds to bring the threshold back to normal. Now it's about 40 seconds before the retune will need to be pressed. Not sure if it might be the coil? I do have another coil that would work from a Lynx model. Just need to put a connector on the cable.
Probably why I was not impressed with the C&G VLF/TR Disc cat series back in the 1970's.
But, will say, the TR/TR Disc Tomcat I also have is much better.
Replaced the Electro. Caps and the voltage regulator as my first step, which is seen in the first picture.
Then started replacing and testing parts as I went along.
Still some parts I didn't replace, didn't finish replacing the resistors. Mostly caps and one IC LM301, that haven't been replaced yet.
Has a second threshold below the main one, if you can set it right on edge. Performance is slightly better.
Had a Eldorado Umax that had the same sub-threshold, barely audible. But, was there. The Bobcat sub-threshold is as loud as the main threshold. You can hear the difference in tone and clarity.
Still have some scratchiness in the volume control from about half to 3/4 rotation, no audio. Threshold audio begins about 3/4 to full. Changing to a brand new pot did not solve the problem.
Still trying to find out why the detector threshold drift from being heard to not being heard. Originally you would have to press the retune button every 10 seconds to bring the threshold back to normal. Now it's about 40 seconds before the retune will need to be pressed. Not sure if it might be the coil? I do have another coil that would work from a Lynx model. Just need to put a connector on the cable.
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