Re: UBITX V3 TX GAIN VARIATIONS
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Actually I’ve been doing a lot of experimentation on flattening/ linearizing the transmit chain. The parts I’ve fallen on are the NE46134’s. They have plenty of gain, Ft of 5 GHz, and with the proper inter stage transformer design… An almost flat (-0/+0.6 dB) frequency profile swept from 0.5-60 MHz is possible. I suppose prototyped, it isn’t much of a uBITx though.
From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Kees T
On Tue, Aug 28, 2018 at 04:25 PM, Rod Davis wrote:
I was wondering about the reasoning behind using several parallel 2N3904 transistors in the uBITX circuit.....they are inexpensive, but why not just use a single 2N2222 ?