Vectronics VEC-131K - Manual (Page 18)

VEC-131K Owner's Manual Aircraft Receiver Kit
16
bottom view
cathode
MV2104
! ! 9. Locate a 2SC2498 transistor. This is Q1.
! ! 10. Q1 has a round and a flat side. Carefully insert the three leads of Q1
into the three mounting holes provided. Make sure that the transistor
body is properly matched with the silk-screened outline. If you insert
the transistor incorrectly, it may be damaged when power is applied.
To ensure best gain, the body of Q1 should sit as close to the PC board
as possible. Gently reform the leads as needed, so the bottom of the
transistor is positioned approximately 3/16” above the surface of the
board. Longer leads may impair performance.
2SC2498
(C2498)
! ! 11. Solder and trim the leads for Q1.
! ! 12. Locate a 2N3904 transistor. This is Q2.
! ! 13. Install Q2 so its body is matches the silk-screen outline. Re-form Q2’s
leads as needed so it sits close to the board. Solder.
! ! 14. Locate the four (4) 8-pin IC sockets. These are “low-profile” style
sockets which are suitable for use at radio frequencies. Note that the
sockets are keyed to indicate pins 1 and 8. The key is either a “U” or
rectangular shaped notch. Inspect each socket carefully, and straighten
any bent pins before attempting installation.