REBUILD IC PIN
Some month ago a friend gave me a lot of card full of transistor, chip, resistor ecc.; on one of it there was an AM7910, the famous chip used in 1200/300 packet modem; unfortunatly it was soldered directly on the board, and it was a double face board, with the chip soldered on both side; so it was hard to use a simple solderer to recover it.
After recovered it, I'll test it
on an other modem just removing the original AM7910 on the base and inserting my one; if
it will work, I'll build a new packet modem.
But how to do it? with double face-double soldered card it's hard to unsolder any device.
So I decided to cut the bord just near the pin border (parallel to the chip) and then in the middle, just below the chip;
after that it was easy unsolder the chip; but some pin was ruined so it was necessary to rebuild it: using a "1000 holes" board and some pin recovered from an old computer jack soldered on this small board I made it (see picture below).
..and this is the new chip with pin rebuilt.
73 de iz7ath, Talino