[R-390] Low Gain on 3-4Mhz

[K2LNU]

Hello R-390 Fans,
Last night I posted a request for information on possible faults on an
R-390A which had low gain on all bands up to 8 mhz.  I replaced the first RF
amp tube V201 and the gain came way up on all frequencies except 3 and 4 mhz
bands.  I checked the second crystal osc output and it looks good.  Question
is, has anyone experienced a failure in  the RF coil circuits between V
201(RF amp and V202 1st mixer).  Also wondering if C252 and C279 are common
points of failure.   Any help is greatly appreciated.
73's
Bill K2LNU