Re: uBITX schema relay K1 #ubitx

Jerry Gaffke
 

Good idea to make use of K1-16 to disconnect Q90 during receive.
This would also protect Q90 from local QRO transmissions into a local antenna,
The similar Q13 on the Bitx40v3 is often blown in such situations, even when the rig is powered down.

Jerry, KE7ER


On Thu, Feb 1, 2018 at 03:08 am, pe0fko wrote:
On RX (and TX) the LP filter is also a connection to the TX power amp by C80, that will give a (very) small load on the antenna signal at RX and a mixer (Q90 diode BE) for strong received signals?

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