Attached is a photo of a 1N4448 diode placed across L14.? This diode has half the junction C of its brothers, the 1N4148 and 1N914.? I doubt it matters although it would be interesting to adjust the diode's Ct parameter in LTSpice to see if there's any adverse high frequency effect.? Even if it did, distributed lead C may swamp any benefit.??
Paul, W9AC
Paul Christensen