I recalibrated ARGO so that VD shows up exactly on 185.301 KHz. Now that Mr. Rusgrove has requested a DOT 3 Allocation he will be required to maintain extremely accurate frequency stability. Having monitored his signal several times I believe he will have no problem maintaining the stringent requirements of the DOT 3 allocations. Best Wishes To You Mr. Rusgrove. Larry Putman WB3ANQ