[Boatanchors] Drake 2B Crystal Confusion

[Joe Connor]

Well, the work on this set is proceeding well. I installed a replacement filter-cap can and the radio sounds good. It's sensitive and has surprisingly good audio. 

    I am, however, confused about crystals. When I bought this radio, there was one extra crystal: a crystal marked 4605.000 kc in the A socket. When I turn to A, I hear a fair number of amateur SSB broadcasts. However, I am not sure what frequency range I'm on. 

    Am I correct that 4605.000 kc is 4.605 mhz? WIth a crystal in the A socket, the manual seems to indicate that I should subtract 4.1 mhz from the crystal frequency to determine the frequency that I'm hearing. That would bring me to 505 khz, which makes no sense. 

    Can someone please tell me what's going? 
   As always, thank you for your help. 
>
>                                                         Joe Connor