[R-390] A "baby" R-390A

[Philip B Atchley]

Hello All.
A gentleman just dropped off an R-648/ARR41 receiver for repair.  This
aircraft receiver appears to be very similar to out "pets", the R-390A. 
But it is much lighter, smaller and has a somewhat different
layout/circuit scheme.  

He said it has poor audio on AM and expressed concern that he "hoped" it
wasn't the 6kHz Crystal filter.  

Anybody out there worked on these?  Does it have any "pitfalls" or other
things that I should be aware of before "digging in"?

73 de Phil  KO6BB
Loving home provided for wayward Boatanchor Receivers.
R-390A '67 EAC.  HALLICRAFTERS SX-71 ('53) & 5R10A ('53).
REALISTIC  DX-160 ('78).  HOMEBREW  Longwave CW receiver.
Merced, Central California, 37.18N  120.29W  CM97sh.

________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today!  For your FREE software, visit:
http://dl.www.juno.com/get/web/.