Found a guide online:
Step 2
Consult a diode color code chart and familiarize yourself with the coding system. The values of the chart are 0 for black, 1 for brown, 2 for red, 3 for orange, 4 for yellow, 5 for green, 6 for blue, 7 for violet, 8 for gray and 9 for white.
Mine works out to 4048.
Step 2
Consult a diode color code chart and familiarize yourself with the coding system. The values of the chart are 0 for black, 1 for brown, 2 for red, 3 for orange, 4 for yellow, 5 for green, 6 for blue, 7 for violet, 8 for gray and 9 for white.
Mine works out to 4048.
I think you're going to have to make an age and heat allowance for the colours there. IN4048 (if that's the only possible interpretation of the colourcode) is a 275A 400V diode and obviously nothing like this this little feller.
So, like rsavas' guess, it's very likely a typical IN4148 and almost every vintage electronic device has one or more of those, tucked away somewhere in the circuits. The only other common types were the DC power supply rectifiers and perhaps the "flying catch" or snubber diodes (e.g. IN4007) fitted between the +/- power and output rails in many designs.
Satisfy yourself by checking dimensions from the relevant diode datasheets by major manufacturers like NXP, Vishay, Onsemi etc. These are not necessarily precise dimensions but all older examples at least, will be within the maximum OEM size limits. FWIW, IN914 is virtually the same diode and is interchangeable.
Satisfy yourself by checking dimensions from the relevant diode datasheets by major manufacturers like NXP, Vishay, Onsemi etc. These are not necessarily precise dimensions but all older examples at least, will be within the maximum OEM size limits. FWIW, IN914 is virtually the same diode and is interchangeable.
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