wide band

I like to know what brand / type lnb I do have . No name or number outside , only B1370VA at the circuitboard . Its a KU PLL type ( 2 X-tals) with 2 freq bands 13 / 18 v low / high switching With lof 9.75 receiving low band channels with correct freq. at 13 v. The signal disapears by changing...