Power Supply / Speaker Model 962


The Model 962 Power Supply is designed to power the TEN-TEC Models 560/561/563/564 and 585 transceivers. The supply delivers 20 amps at 13.5 Vdc from a 115/230 Vac 50/60 Hz source. Circuit features include an electronic over-current sensor which shuts off the output if the current demand exceeds 22 amps. The over-current shut down condition is reset by cycling the POWER switch from ON to OFF and back to ON.

The output voltage is available through a 4 x 14 guage 3 foot cable and connector. The cable carries +13.5 Vdc, ground and the "hot" side of the AC primary and mates directly to the POWER jack on the 560/561/563/564 and 585 transceivers with a 4 pin AMP MATE-N-LOC connector. Two RCA phono jacks on the back of the supply also provide +13.5 Vdc for low current (2 or 3 amps) auxiliary applications.

962 Power Supply Schematic from WB4JTR

From WB4JTR - In the 962, the regulator pass element was moved to the negative side of the bridge so that the collectors of the power transistors could be grounded – eliminating the requirement for the mica insulators and protective plastic covers.


  • Input Voltage: 105 - 125 Vac or 210 - 250 Vac, 50-60 Hz.
  • Output Voltage: 13.8 Vdc, internally adjustable from 11.5 to 15.0 Vdc.
  • Output Current: 20 Amps full load, 22 Amps maximum for 5 minutes.
  • Current Limiting: Electronically disables output. Factory set threshold at 22 Amps.
  • Regulation: -3% at output connector for no load to 20 Amps full load.
  • Ripple: 20 mV peak to peak at 20 Amps.
  • Speaker Impedance: 8 ohms

Difference Between Models 961 and 962

From a post on the Ten-Tec Reflector:

"they regulate the neg (-) line in the 962, where they regulated the pos (+) line in the older 961."

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QR Code 962 (generated for current page)