RSUBPreampRk-Ck Resistor Substitution Box

Use: Preamp cathode resistor and capacitor.


Resistor and Capacitor Substitution Box, 5K linear pot and selection of 12 electrolytic caps. .68, 1, 2.2, 4.7, 10, 20, 33, 47, 68, 100, 220, 330uF @ 50VDC

OK, I admit it. You can calculate circuit values until the cows come home but sometimes it’s so much easier and faster to just dial it in. I’ve been a ham and involved in engineering for over 35 years, and I gotta tell ya, these are undoubtedly some of the most indispensable tools I have ever had.

The Rk-Ck Preamp Sub Box has both a pot and a selection of 12 different electrolytic capacitors in parallel with the pot for dialing in the cathode bias components of a preamp stage. The electrolytic capacitors are rated at 50 volts, and the pot is 2 watt, 5K linear.


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