Only problem with that is that a part branded as 2N3055 might actually be a very fast part, not the original slower than paint drying planar device, but the modern part, while meeting or exceeding all the headline specs for a 2N3055, might actually have quite a bit of gain at 30MHz, and can bite you. After all, all you need to brand a device as 2N3055, is have a peak collector current of 15A, gain greater than 3 at that current, and low leakage at 60V, which is very easy today with most modern process plant. But the data sheet does not reflect this at all, as you do not get typical values for a lot of those parameters, just the minimum JEDEC spec for the part number.