[MRCA] ARC-1 crystals

[Rob Flory]

http://www.ebay.com/itm/LOT-of-5-NOS-Vntg-US-Navy-Radio-Crystals-CR-1A-AR-CW-7480-000-KC-1945-Ham-WWII-/320910786479?pt=LH_DefaultDomain_0&hash=item4ab7c5ffaf

These will put your ARC-1 on 144.36 MHz.  This type cannot be ground as the
electrodes are plated onto the actual crystal.  You may experience
interference from 144.39 APRS operations which can be reduced by using
horizontal polarization.

RF