K1EL WKUSB with WinKeyer3 User Manual WKUSB
WKUSB User Manual 12/20/2017 Rev 1.0 Page 3
WKUSB Connections
The four central RCA jacks are keying outputs. The connector on the left is the USB connector
and the connector on the right is an 1/8” stereo jack which accepts paddleset input. The paddle
can be an iambic or side swiper type. A bug is not acceptable. The paddle inputs are activated
when switched to common ground (GND). The paddle connector needs to be wired this way:
GND
DAH
DIT
The RCA jacks provide two keying and two PTT outputs. The output selection can be done by
software or paddle command in standalone mode. Likewise, PTT is enabled or disabled the same
way. These outputs are isolated from WKUSB ground and all other WKUSB signals by optically
coupled solid state relays. The outputs can switch voltages up to +/- 350 V at up to 120 mA and
provide a 5000 volt isolation from WKUSB electrics. An output connector, either key or PTT,
needs to be wired this way:
GROUND
KEY or PTT
WKUSB contains no user serviceable or configurable jumpers, Please do not tamper with or
modify the internal circuitry of WKUSB as this will void the unit’s warranty and may result in
unsafe operating conditions.
The USB connector is designed to mate with a Type A to B
cable. This cable type is shown at left and is most
commonly used with printers. If necessary the cable can be
purchased from Hamcrafters. The interface will run at USB
1.0 and 2.0 speeds but is not compatible with USB 3.0.
To Next Page
