Pic-a-star
Builders pages, Paul, M1PVC
Paul has been busy again, after
building three Pic-a-Stars. Paul had an unused PICNMIX and needed a sig gen
for testing, so this is the result. An excellent build by Paul, following
in the theme of his other projects.
Paul re-worked the original PnM
PIC code also to better suit the new role as a Sig. Gen.
<vk3pe>
Hi Glenn,
Success at last as shown in attached pics.......I
have now achieved a buffer ALC controlled amplifier (based on an
AD603
chip and LH0033 high speed buffer/line driver) which holds the output steady
at 7dBm over a frequency range of 500kHz to 40MHz. John (G8MM) supplied me with
an ex HP equipment switched attenuator which gives 0 to -80dBm attenuation in
1dBm steps which I have incorporated. The Vectron OCXO holds output nice and
stable.........carrier only with no modulation facilities but I can live with
that. Sweep feature works well but sweep is a little slow.....BNC socket on
rear panel is for 'scope trigger' when in sweep mode......fan in there to fill
a hole that was already in the aluminium panel..........connected but not really
necessary. CHEERS Paul
Click
on all images for larger picture.
Page
created by VK3PE on 8th Jan, 2011
