DC-DC Mod Kit (for 48K Issue 3/3B motherboards)

DC-DC Mod Kit (for 48K Issue 3/3B motherboards)

Components required for the DC-DC mod for Issue 3 and 3B motherboards on the 48K Spectrum. This mod improves reliability in the rectification circuit.

NOTE this kit can be purchased as an add-on to the full capacitor kit – if you need the full kit then purchase from there.

The following components are included:

• 1 x Axial Capactitor 1uf 63v
• 1 x Axial Capactitor 22uf 25v
• 2 x BA157 Diode
• 1 x 1N4148 Diodes
• 1 x Zener Single Diode, 5 V
• 1 x Resistor 220R 5%, 0.25W
• 1 x Resistor 2K2 5%, 0.25W

See notes here on performing the mod:

DC-DC Mod notes PDF