[Elecraft] XV144 ATF34143 phemt equivalent

[Chris Reed]

Hi all,
The ATF34143 Phemt used on the rx input is discontinued and I just wondered what the suggested replacement would be for this little gremlin. I've Just purchased a second hand XV144 and I'm not getting any variation when I adjust c1 and it looks like the 34143 has already been changed looking at the state of the solder.
Any guidance would be much appreciated. 
ATB
Chris
G1rpo