Humminbird Side Imaging Forums
General => General Discussion => Topic started by: Meena on February 11, 2014, 05:02:12 PM
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I think I have seen this discussed before but I have a 798ci with the SI compact transducer and was wanting to exchange it for a trolling motor one. Are the crystals the same in both and is the trolling motor one just as good? Looks like it is a available for the exchange program HB has.
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I'm pretty sure SI crystals are the same for the stock XNT 9 SI 180 T (Compact SI)..and the TM puck style XTM 9 SI 180 T...
Some have opted to trade for the XHS 9 HDSI 180 T ...which has longer SI crystals...which should give sharper SI images..
The XHS 9 HDSI 180 T can operate at 455kHz and 800kHz ...but your 798 can only transmit the 455kHz frequency...but it still may be worthwhile to get the longer crystals...
The HDSI also comes in a TM version....which is basically the transom HDSI with hardware to adapt to the TM...
http://store.humminbird.com/products/314024/XTM_9_HDSI_180_T (http://store.humminbird.com/products/314024/XTM_9_HDSI_180_T)
Transducer Shield and Saver makes an aftermarket sturdy bracket for the XHS 9 HDSI 180 T to mount to the TM...
http://www.transducershieldandsaver.com/home/transducers?page=shop.product_details&flypage=flypage.tpl&product_id=11&category_id=5 (http://www.transducershieldandsaver.com/home/transducers?page=shop.product_details&flypage=flypage.tpl&product_id=11&category_id=5)
Rickie
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Rickie is correct : the transom mounted XNT-9-Si-180-T transducer and the Trolling Motor mounted XTM-9-Si-180-T transducer both use the same elements for the Si/Di sonar (and the 2D sonar).