[Elecraft] Are the internal 2m Transverter and the external XV144 the same internally?

[KV5J]

"The K144XV is essentially an Elecraft XV144 transverter adapted to fit into
the K3. The RX and LO parts are almost completely taken over from the XV144
so you can expect a similar level of RX performance from the K144XV.
Contrary to the XV144 the TX/RX switching inside the K144XV is implemented
by using PIN diodes, which is smaller, faster and not really a drawback in
terms of IMD. To further reduce the K144XV size the TX driver and final amps
have been completely replaced by discrete stages rather than using a RF
module as in the XV144. The design of these high gain discrete power stages
under space constraints can be a challenging task, since unwanted coupling
between components might cause oscillations. As there are no dedicated
control lines connected to the K144XV, the transverter functions are handled
by the KXV3A interface via DC voltage levels and pulses on the IF in/out
lines. TX/RX switching is maintained through an overlayed DC voltage on the
receiver IF line, whereas the transverter ON/OFF and LO range control is
managed through different length DC pulses on the transmitter IF line."


Keith, KV5J



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