I have 17.5 MHz hc6u crystals and just about any others you need for.Collins equipment on the amateur radio bands, WARC and otherwise. Just visit my Web site or drop me an e-mail at: af4k at hotmail.com This Yahoo address is trashed by spam, so a reply here will not work. Thanks & 73... Regards, Bry Carling http://www.AF4K.COM Sent from me Android thingie..