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RSUBPowerRk-Ck Resistor Substitution Box

Use: Power amp cathode resistor and capacitor.

$35.00

Resistor Substitution Box, Power Rheostat, 500 ohms, 25 watts, with connection terminals for parallel electrolytic 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 RSUB Power Rk-Ck Sub Box is used for dialing in cathode bias by substituting it for the cathode bias resistor in a cathode biased output circuit. The box includes two terminals to connect an electrolytic capacitor in parallel with the cathode resistance. The rheostat is rated at 500 ohms and 25 watts.

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