Here i show the 2th Version of the SSTV/FAX-Modem.

The construction is very simple.The integrated circuit is a OPAMP UA741.

Used electronic elements for that Modem:

IC1 = UA741

D1-D4 = 1N4148

C1/C2 = 100nF

C3/C4 = 4,7nF

R1/R2 = 10K

R3 = 47K

R4 = 220 Ohm

Rv = 22K

9-pin D-SUB plug F / M