( only 10 semiconductor
transistors) have LW and some SW broadcast band.
I added 19m and
(easy for this
receivers, you need only free band-plate for make new band).
I have made
also CW local oscillator (LO) in IF frequency 465 kHz. This
LO mast be set near IF amplifier and receiver modification to
enable them as CW/SSB-reception.
These are the VEF-202 IF filter modifications
with ceramic filter 465 kHz.
The VEF-202 uses the simple LC filter 465 kHz with bandwitdh
about 13-14 kHz and not good selectivity perfomance. You can
install low cost ceramic IF Filter PF1P-õõ with
bandwitdh 6-8 kHz. (also FP1P-õõ)
After you installed ceramic filter - you mast
adjustment L32 L33 L34
and may be L36 for better bandwidth and min
loss in passband !
You can see and listen my
receiver after modification, i did not save voice from BC
station, ....but saved CW and SSB in RadioHam`s 17 and 40