Re: level and wave shape after balans mixer?
- farhan wrote:
i am convinced that we need to add detailed test measurements for the
transceiver on the site. i have most of them in my log book. i will
post them soon.
I would welcome test measurements - two days of head scratching so
far! The RX is alive in my rig but not yet kicking! I have a lot of
BFO audible in the output also I have had to bypass the xtal filter
and the band pass filter to get any signal strength.
I'll tell you all this story just for fun. I had no joy with the
band pass filter and nearly threw the rig out of the window. Then I
realised that when I had "made" 2.2 pm out of 5 x 10pf caps I had
them in parralel and not series! Oh boy, the basic mistakes!
I try some more tomorrow.
--- In BITX20@..., "vdberghak" <vdberghak@z...> wrote:
Thanks for the additional information.foundthe correct schmatics are now at www.phonestack.com/farhan.I checked again http://www.phonestack.com/farhan/bitx.html and
out that point 5 and 6 are stil wrong (not in accordance with theone,
did I make the correct connections, is it really working the wayit
should be) so I like to check something.thatif you have already made the crystal filter, it is best that youmeasureand check the signal at the output Q12 (without the RF mixerconnected).
comesmorealive first.The receiver works, while connecting a wire to Q3 I hear a lot
then with the wire connected to the mixer.fori am convinced that we need to add detailed test measurements
thethattransceiver on the site. i have most of them in my log book. iwill postthem soon.In general, voltages can be checked easily to find out roughly
the connections are correct and the correct values resistors arecurrent
with and without oscilator on (for every stage) will avoid theneed
for more test equipment?