A new video of Bitx3B is being shown here, which has the following improvement:
1. Full coverage of 20Mt band from 14.000MHZ to 14.350MHZ
2. Zero drift with varicap tuning diode.
The varicap is 1SV149 . They work up to a maximum of 10V biasing and capable of a C max of 500pF at 1V bias. so we can manage from 8V regulator easily.
This device was suggested to me by my good friend MVS Sarma from Hyderabad. India.
After trying this device i did not think twice by replacing it with MV209.
So now we have a very stable VFO with BITX3B giving a complete band coverage, who wants a DDS anyway for a mono band tcvr ........
1. Full coverage of 20Mt band from 14.000MHZ to 14.350MHZ
2. Zero drift with varicap tuning diode.
The varicap is 1SV149 . They work up to a maximum of 10V biasing and capable of a C max of 500pF at 1V bias. so we can manage from 8V regulator easily.
This device was suggested to me by my good friend MVS Sarma from Hyderabad. India.
After trying this device i did not think twice by replacing it with MV209.
So now we have a very stable VFO with BITX3B giving a complete band coverage, who wants a DDS anyway for a mono band tcvr ........