I remember when the first Fisher Gold Bug and Teknetics G2 came out and their 19 kHz Frequency didn't work well with a Concentric coil. Later the F-19 Ltd. 'family' was introduced and I tried a Concentric coil or two but they didn't work well. FTP claimed it was due to the operating Frequency, and I found that only a good DD coil performed reasonably well.

So, double-check all your detectors and Frequencies and different search coils to find what works well for you and the challenging sites you hunt. Now I am looking for a 5" DD for my F-19 Ltd. However, I am pleased to have a new 7" Concentric coil for my Racer 2 as it works quite well in an Iron Nail challenge over a mid-sized DD such as the 5X9½. Always good to have search coils you can depend on.

Monte

"Your EYES ... the only 100% accurate form of Discrimination!"
Stinkwater Wells Trading Post
Metal Detector Evaluations and Product ReviewsI'm now 'back home' in Farr West Utah monte@ahrps.org ... or ... monte@stinkwaterwells.com 503-481-8147Detector Outfit: A selection of my chosen makes and models, with the best coils mounted for the tasks I'll take on.F-19 * F-5 * Racer * Racer 2 * V-540 * Relic * Silver Sabre µMAX * Bandido II µMAX * XLTPinpointers: Garrett AT Pro-Pointers .. Headphones: 'Hornet' .. MS-3 Z-Lynk .. ML-80 *** All working well today to make memories for tomorrow. ***