"Hot" circuitry question

[Walknstik]

Does a "Hot" circuitry designed Tesoro detector require a 4-pin coil set-up and if so why? The only reason I can think of is somehow maybe more gain can be achieved by using a 4-pin designed coil My LST and Diablo both utilize 4-pin coils and they do have more built-in gain versus my 5-pin coil Tesoro's.

 

[Oldguy]

I've noticed that Tesoro has moved away from calling their 4 pin coils "hot", or "high output technology" in their advertising. They now just refer to 4 pin coils as "delta", and 5 pin as "epsilon". I have noticed that the 5 pin coils run more stable but the 4 pin coils hit deeper, not sure if it is due to the coil or the detector itself though.

 

[Walknstik]

I have never used a "HOT" circuitry Tesoro metal detector and was just curious as to why they utilize 4-pin coils. As to maybe 4-pin coils hitting deeper targets... I think that is mainly due to the detectors electronic design and not necessarily the coil.? Thanks for your insight and comments Oldguy...HH!

 

[tvr]

The impedance of the coils need to match the circuit design. The H.O.T. series coils use a different connector than the standard units to make sure you use the coil with the right series of detectors. Keeping a minimum of transmit / receive circuit characteristics means they only need to maintain three lines of coils. Makes sense from a maintainability perspective. The three lines of coils I'm thinking about are the standard 5 pin series, the 4 pin H.O.T. series and the Pulse Induction Sand Shark / PIranha series.