I disassembled the probe of my signal tracer, PACO model Z80. Does anyone have a schematic for this probe? It appears the singal goes through a 47K resistor, to a detector, then through another device that looks like a wire wound resistor. I would have though there would have been a capacitor in series prior to the detector. Any thoughts on this?

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WHAT !......you don’t recognize an old style .0068 pf (mmf) TUBULAR ceramic capacitor.
Should be color coded blue-gray-red. It’s providing the DC isolation of your probe tips input.
73’s de Edd

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:I disassembled the probe of my signal tracer, PACO model Z80. Does anyone have a schematic for this probe? It appears the singal goes through a 47K resistor, to a detector, then through another device that looks like a wire wound resistor. I would have though there would have been a capacitor in series prior to the detector. Any thoughts on this?

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:WHAT !......you don’t recognize an old style .0068 pf (mmf) TUBULAR ceramic capacitor.
:Should be color coded blue-gray-red. It’s providing the DC isolation of your probe tips input.
:73’s de Edd
:Afterthought/Addenda......while you still have that probe apart be sure to chech out the slide switch, I'll just suspect it to be of such a quality unit that it utilized real silver contacts and slide springs ...good....but bad after a time of deposition of a black coating of silver oxide. Splaying the casings four crimp tabs apart should permit dropping down the bakelite insulative blank with its contacts.(Keeping a close eye on all of the integral parts of the chicken kit..don't want to loose any of the feathers!) Then all conductive areas can be shined up with an eraser and re assembled with a tad of contact dope on them to somewhat allay their future oxidation along with a clean/noiseless switching action.
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::I disassembled the probe of my signal tracer, PACO model Z80. Does anyone have a schematic for this probe? It appears the singal goes through a 47K resistor, to a detector, then through another device that looks like a wire wound resistor. I would have though there would have been a capacitor in series prior to the detector. Any thoughts on this?

Thank you for the information, it's a never ending study to get into this hobby.

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::WHAT !......you don’t recognize an old style .0068 pf (mmf) TUBULAR ceramic capacitor.
::Should be color coded blue-gray-red. It’s providing the DC isolation of your probe tips input.
::73’s de Edd
::Afterthought/Addenda......while you still have that probe apart be sure to chech out the slide switch, I'll just suspect it to be of such a quality unit that it utilized real silver contacts and slide springs ...good....but bad after a time of deposition of a black coating of silver oxide. Splaying the casings four crimp tabs apart should permit dropping down the bakelite insulative blank with its contacts.(Keeping a close eye on all of the integral parts of the chicken kit..don't want to loose any of the feathers!) Then all conductive areas can be shined up with an eraser and re assembled with a tad of contact dope on them to somewhat allay their future oxidation along with a clean/noiseless switching action.
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:::I disassembled the probe of my signal tracer, PACO model Z80. Does anyone have a schematic for this probe? It appears the singal goes through a 47K resistor, to a detector, then through another device that looks like a wire wound resistor. I would have though there would have been a capacitor in series prior to the detector. Any thoughts on this?

What would the model or type of diode be in the probe? I would like to duplicate it.
Thanks

::WHAT !......you don’t recognize an old style .0068 pf (mmf) TUBULAR ceramic capacitor.
::Should be color coded blue-gray-red. It’s providing the DC isolation of your probe tips input.
::73’s de Edd
::Afterthought/Addenda......while you still have that probe apart be sure to chech out the slide switch, I'll just suspect it to be of such a quality unit that it utilized real silver contacts and slide springs ...good....but bad after a time of deposition of a black coating of silver oxide. Splaying the casings four crimp tabs apart should permit dropping down the bakelite insulative blank with its contacts.(Keeping a close eye on all of the integral parts of the chicken kit..don't want to loose any of the feathers!) Then all conductive areas can be shined up with an eraser and re assembled with a tad of contact dope on them to somewhat allay their future oxidation along with a clean/noiseless switching action.
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:
:::I disassembled the probe of my signal tracer, PACO model Z80. Does anyone have a schematic for this probe? It appears the singal goes through a 47K resistor, to a detector, then through another device that looks like a wire wound resistor. I would have though there would have been a capacitor in series prior to the detector. Any thoughts on this?

A 1N34 or 1N60 germanium....(by virtue of their lower Vf drop)...would be in order, how about the chance that the original was numbered or color code ringed with 2 colors..Wud 'ave been orange yellow for a 34 or blue black for a 60 ?
73's de Edd

:What would the model or type of diode be in the probe? I would like to duplicate it.
:Thanks
:
:::WHAT !......you don’t recognize an old style .0068 pf (mmf) TUBULAR ceramic capacitor.
:::Should be color coded blue-gray-red. It’s providing the DC isolation of your probe tips input.
:::73’s de Edd
:::Afterthought/Addenda......while you still have that probe apart be sure to chech out the slide switch, I'll just suspect it to be of such a quality unit that it utilized real silver contacts and slide springs ...good....but bad after a time of deposition of a black coating of silver oxide. Splaying the casings four crimp tabs apart should permit dropping down the bakelite insulative blank with its contacts.(Keeping a close eye on all of the integral parts of the chicken kit..don't want to loose any of the feathers!) Then all conductive areas can be shined up with an eraser and re assembled with a tad of contact dope on them to somewhat allay their future oxidation along with a clean/noiseless switching action.
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::::I disassembled the probe of my signal tracer, PACO model Z80. Does anyone have a schematic for this probe? It appears the singal goes through a 47K resistor, to a detector, then through another device that looks like a wire wound resistor. I would have though there would have been a capacitor in series prior to the detector. Any thoughts on this?