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| What happend to 320K resistors ? |
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| ebastler:
--- Quote from: Chris56000 on August 08, 2021, 06:06:58 am ---Where would I find 9.9nF and 932pF polystyrene capacitors, as used in some old Cossor Oscilloscopes, --- End quote --- What are the tolerances of those parts, and how critical is the value in the scope? E.g. I did find 932 pF capacitors here (http://www.amidon.de/contents/de/d668_01.html), but their specified tolerance is 5%. That would mean that a 910 pF capacitor (E24) should work nicely, provided you find (select) one which is not in the lower half of its own tolerance range. Ditto for the 9.9 nF: Would 10 nF not work? |
| Zero999:
--- Quote from: Monkeh on March 02, 2021, 04:39:06 pm --- --- Quote from: mariush on March 02, 2021, 04:28:21 pm ---If you're concerned about looks., you could just have footprints for two resistors in series for each resistor. Then, use 0 ohm resistors where a resistor is not needed. If you use surface mount resistors, 0603 or 0402 resistors don't take that much space. Surface mount resistors would also allow you to stack two resistors, one on top of the other... basically two resistors in parallel. --- End quote --- But.. SMD is for pros. He's only a hobbyist, he can't handle that. --- End quote --- Nonsense. The larger SMT parts are easy to use, especially 805 and 1206 parts which can fit between two tracks on some stripboard. --- Quote from: ebastler on August 08, 2021, 08:35:36 am --- --- Quote from: Chris56000 on August 08, 2021, 06:06:58 am ---Where would I find 9.9nF and 932pF polystyrene capacitors, as used in some old Cossor Oscilloscopes, --- End quote --- What are the tolerances of those parts, and how critical is the value in the scope? E.g. I did find 932 pF capacitors here (http://www.amidon.de/contents/de/d668_01.html), but their specified tolerance is 5%. That would mean that a 910 pF capacitor (E24) should work nicely, provided you find (select) one which is not in the lower half of its own tolerance range. Ditto for the 9.9 nF: Would 10 nF not work? --- End quote --- 18nF & 22nF in series. |
| Monkeh:
--- Quote from: Zero999 on August 08, 2021, 11:59:01 am --- --- Quote from: Monkeh on March 02, 2021, 04:39:06 pm --- --- Quote from: mariush on March 02, 2021, 04:28:21 pm ---If you're concerned about looks., you could just have footprints for two resistors in series for each resistor. Then, use 0 ohm resistors where a resistor is not needed. If you use surface mount resistors, 0603 or 0402 resistors don't take that much space. Surface mount resistors would also allow you to stack two resistors, one on top of the other... basically two resistors in parallel. --- End quote --- But.. SMD is for pros. He's only a hobbyist, he can't handle that. --- End quote --- Nonsense. The larger SMT parts are easy to use, especially 805 and 1206 parts which can fit between two tracks on some stripboard. --- End quote --- You might want to read the whole thread for some context. |
| Zero999:
--- Quote from: Monkeh on August 08, 2021, 04:48:37 pm --- --- Quote from: Zero999 on August 08, 2021, 11:59:01 am --- --- Quote from: Monkeh on March 02, 2021, 04:39:06 pm --- --- Quote from: mariush on March 02, 2021, 04:28:21 pm ---If you're concerned about looks., you could just have footprints for two resistors in series for each resistor. Then, use 0 ohm resistors where a resistor is not needed. If you use surface mount resistors, 0603 or 0402 resistors don't take that much space. Surface mount resistors would also allow you to stack two resistors, one on top of the other... basically two resistors in parallel. --- End quote --- But.. SMD is for pros. He's only a hobbyist, he can't handle that. --- End quote --- Nonsense. The larger SMT parts are easy to use, especially 805 and 1206 parts which can fit between two tracks on some stripboard. --- End quote --- You might want to read the whole thread for some context. --- End quote --- I can't be bothered to re-read this old thread, but I was using SMD parts, when I was 12. You'd have to be petty bad at soldering, to not be able to use them. |
| ebastler:
--- Quote from: Zero999 on August 08, 2021, 05:23:29 pm ---I can't be bothered to re-read this old thread, but I was using SMD parts, when I was 12. You'd have to be petty bad at soldering, to not be able to use them. --- End quote --- Then you should at least bother to fix your irony detector. |
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