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Thursday, April 24, 2008

Modifications Bitx Version 3 Qrp Tcvr By Om Daniel Cappa IW1AXR


Our Friend Vittorio has sent us modifications for the Bitx version 3 Qrp Tcvr.which his friends Om Daniel Cappa IW1AXR has made and contributions by IK1JNS, Pino Panniello, www.panniello.it . Q5 VfO transistor is now JFET BF245/2N3819 resulting in improved noise performance in this stage.
A single transistor stage has been added in the mic pre amp.Another transistor from one end of the volume control pot to ground mutes the AF amp in transmit. ZRF (RFC 100uh to 1mh) between audio stages and product detector/mod blocks any Rf from getting into audio stages.

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