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
RSUBPreampRk-Ck Resistor Substitution Box
Use: Preamp cathode resistor and capacitor.
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.