Elecraft PR10 - Manual (Page 3)

PR10 10-meter Receiver Preamplifier Owner’s Manua l Page 3
Other 10-meter Receivers and Transceivers
The cover label on the PR10 identifies the signal, power and control connections.
 The preamplifier is switched into the circuit by applying +12 VDC to the unit if jumper P2 is
installed or, if jumper P2 is removed, by applying +12 VDC and grounding the CTRL input.
Jumper P2 is shown in Figure 3.
 If used at a transceiver RF output, limit the RF power passing through the PR10 to 15 watts in
bypass. RF power must not be present when relays switch.
 The coaxial lines may carry up to 13.8 VDC as well as RF to power an external device when it is
in bypass mode. Blocking capacitors isolate the preamplifier circuit from the d-c voltage.
Figure 2. PR10 Mounted on Elecraft K3.