ISKRA UPM Koolstof Carbon Film Resistors
Carbon film resistors from the former Yugoslav. These resistors have been heavily used by Marshall in their guitar amps and by other audio gear manufacturers like the VOX tonebender
The Iskra UPM resistors were available in 0.125W, 0.25W, 0.5W, 1W and 2W
The following codes were used for different dissipation. Don't be tricked by the UPM050, that's not a 0.5Watt version !!
UPM200 = 2W ( 8 x 20mm )
UPM100 = 1W (5 x 15 mm)
UPM075 = 0.5W ( 4 x 10mm )
UPM050 = 0.25W ( 2.5 x 8mm )
UPM033 = 0.125W ( 2 x 6mm )
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