[Premium-Rx] Collins HF-2050

[Chris fuller]

hi,
     i have a collins hf-2050 that i bought awhile back but never really
used and just dug it out and started to use it again and noticed that the
tuning seems a bit stiff with the tuning knob.i was wondering of thos is a
common  problem with the receiver such as the heat issues and if theres
anything i can do to rectify the problem.thanks to anyone that can provide
some answers.regards,
                                                             chris