I bought two elecraft transverters. After long doubts about the purchase of a VHF or a combined HF / VHF transceiver for becoming active on 144 Mhz. I bought the two transverters a XV144 and XV50.

Specs

I.F. transmit levels from -20 dBm to +39 dBm (.01 mW to 8 W) can be accommodated.
Multiple transverters can be daisy chained to a single IF transceiver, providing multi-band operation without cable rearrangement.

General Size

Cabinet: 1.3” H x 7.8” W x 8.3” D (3.3 x 19.8 x 21 cm)
Overall: 1.5 H x 7.8 W x 9.5 D incl. feet and connectors (3.8 x 19.8 x 21 cm)
Weight: 2.5 lbs (1.1 kg)
Supply Voltage: 13.8 VDC
Current Drain: Receive: 250 mA (typical)
Transmit: 4 A typical
Frequency Ranges: XV50: 50 – 52 MHz
T/R Switching Time: 3 ms (typical)
T/R Key Input: Ground for transmit: must pull 5 volt logic level to within 0.5 volts of ground at < 1 ma
I.F. Overload Protection: Survives 100 watts RF input at the I.F. Port without damage with transverter un-keyed (in receive mode) 

Connectors:
K2 or K3S/K3 Interface: DB9
Keying Line Input: RCA
Keying Line Output: RCA
I.F. In/Out: BNC
Aux (Rx-Only Ant): BNC
Antenna: SO-239 (UHF) on XV50 

TRANSMITTER
Power Out (50-ohm load): 20 watts
SSB/CW 10 watts continuous carrier modes
Minimum Supply Voltage Recommended: 12 VDC
Operating Modes: CW, SSB, AM, FM, Digital Modes
I.F. Input Frequency Range: 28 – 30 MHz (XV50, 144 & 222)
I.F. Input Power Range: 0.01 mW (-20 dBm) to 8 watts (+ 39 dBm)
Harmonic Content: < – 60 dBc at 20 watts output

Receiver
Noise Figure: < 1 dB
Conversion Gain: 25 dB typical for XV50
Image Rejection: > 60 dB
3rd-Order Intercept: +20 dBm (typical) ority52 \lsdlo