---
title: "Capacitors in the Timex/Sinclair 2068"
id: "58940"
type: "page"
slug: "capacitors-in-the-timex-sinclair-2068"
published_at: "2025-02-10T13:50:34+00:00"
modified_at: "2025-02-10T13:51:11+00:00"
url: "http://localhost/computers/timex-sinclair-2068/technical/capacitors-in-the-timex-sinclair-2068/"
markdown_url: "http://localhost/computers/timex-sinclair-2068/technical/capacitors-in-the-timex-sinclair-2068.md"
excerpt: "When it comes to vintage computers, one of the first pieces of advice is “replace the capacitors.” And for many older computers, this is good advice. The Timex/Sinclair 2068 has only a few capacitors that you could potentially be concerned..."
taxonomy_model:
  - "Timex/Sinclair 2068"
taxonomy_indiv:
  - "Carl Miles"
---

When it comes to vintage computers, one of the first pieces of advice is “replace the capacitors.” And for many older computers, this is good advice.

The Timex/Sinclair 2068 has only a few capacitors that you could potentially be concerned about. And, as it turns out, most are still ok and don’t require replacement.

In February 2025, [Carl Miles](/indiv/carl-miles/)
 measured the values of these capacitors in the T/S 2068. The data are below.

##### PCB REV.: 335-850001-03A Serial# P06-67P2

Capacitor DesignationValue uFVoltageDiameterLead SpacingFreq @120Hz Actual Value uFActual D @120HzActual Q @120HzActual ESR @120HzActual Theta @120HzManufacturerDate CodeSeriesTemp °CCapacitor PurposeC3470.0025V13 x 31Axial461.400.06216.020.1-86.4SAMYOUNGCE02WSL85DC Input FilterC211.0050V5 x 13,5Axial1.040.02539.532.2-88.5SAMYOUNG SM85RESET FilterC401000.0025V16 x 31Axial957.100.06315.580-86.2SAMYOUNGCE02WSL85Power Supply Filter +5VC4147.00 16V6,5 x 14Axial37.820.09113.1-84.7SAMYOUNG SM85Power Supply Filter +12VC58100.0016V6,5 x 18Axial88.720.07213.791-85.8SAMYOUNG SM85Composite VideoC60100.0016V6,5 x 18Axial81.710.09610.351.5-84.4SAMYOUNG SM85SCLD Power FilterSo are these capacitors good or bad?

Capacitor DesignationValue uFFreq @120Hz Actual Value uFPercent Difference (Less than +/-20% Considered Good)D Factor (<0.100 Considered Good) Actual D@120HzQ Factor (>10 Considered Good) Actual Q@120HzActual ESR@120HzTheta > (-80 Considered Good) Actual Theta@120HzPercent Difference  
(< -10% Difference Considered Good)C3470uF461.4uF-1.8297872340.06216.020.1-86.4-4C211uF1.0375uF3.750.02539.532.2-88.5-1.666666667C401000uF957.1uF-4.290.06315.580-86.2-4.222222222C4147uF37.82uF-19.531914890.09113.1-84.7-5.888888889C58100uF88.72uF-11.280.07213.791-85.8-4.666666667C60100uF81.71uF-18.290.09610.351.5-84.4-6.222222222All the capacitors are realistically good. The 47uF (used for the +12V Supply filter cap) and 100uF cap for the SCLD Filter arguably could be considered for a replacement (the measured capacitance values for these capacitors are getting close to -20% and their Q factor is getting close to 10). There certainly are no BAD caps here.