Re: ubitx - stop press
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The 2N2219 didn't have enough juice at higher HF frequencies (at least the ones in my junk box). The 2N3904s don't need a heatsink either.
On Mon, Dec 11, 2017 at 11:48 AM, AndyH <ahecker@...> wrote:
Just the close the circle, so to speak. Farhan has additional comments in the sales write-up for the µBITX:The power chain uses four common plastic 2N3904s in push-pull as drivers. The 2N3904s have enough gain at 30 MHz. The 2N2219s tried earlier were found to have low gain at higher frequencies.Andy, KG5RKP