--- In BITX20@..., "vdberghak" <vdberghak@z...> wrote:
What is the status of all the other builders? ;-)
Progress at this end is slower than hoped but the rx is now working
very well.
Two minor points.
1. The middle section of the band pass filter needed a bit more
reactance. An extra 10pf across the capacitor was fine. An extra turn
or two on the tap washer would have done.
2. A 0.001uf cap. across the 4.7K pot,at the circuit board end of the
screened lead eliminated some RF break through and stopped the pot
from making a scratchy sound.
I wasted some time setting the BFO as I had foolishly assumed the
filter would centre on 10 MHz and set the freq. at 9.998500. It was
only later that I realised that Heinz, OE5EEP had done all the work
and that the mid point of the filter was about 9.996450. A BFO
setting of 9.996300 worked perfectly. Cant wait to get the PA built.
Incidentally, checking the R/T switch there is a loud squeak on
turning back from tx to rx. Has anyone else found this?
John G0UCP
