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Tenma 72-375 1M 5Vrms 50ohm Portable Insutrial Digital Frequency Counter | eBay
BGTBL FA-2 Plus 1Hz-6GHz Frequency Counter Frequency Meter 11Bit/Sec 10MHz OCXO | eBay
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Frequency Counter Frequency Meter 11Bit/Sec High-Precision FA-3 FREQ COUNTER | eBay
HEWLETT PACKARD 53131A 225 MHz Universal Frequency Counter | eBay
Marine Radio Co. MRC MC-5207 Frequency Counter | eBay
GY560 Frequency Counter Meter for 2-Way Radio Transceiver GSM Portable | eBay
