Ramsey Electronics HR40 Manual de Instruções descarregar pdf (Página 17)

FHT-1 • 17

 84. Winding L2 and L7: Use the heavy gauge

tinned bus wire in your kit for these coils.

Wind these coils on the threads of the

provided 5/16"X20 bolt to assure perfect

forming of the coils. (You wondered what that

big bolt was for - didn't you!) Both coils are

1½ turns. They appear to be 2 turns if viewed

from the top. They will fit neatly into the PC

board without any excessive bending or

stretching.

 85. Winding L3 and L4: Use the same wire and procedure as used

above for these coils. Each coil is 2½ turns and will appear to be 3 turns

if viewed from the top.

The "legs" or leads for inserting L2, L7, L3 and L4 should be about 1/4” long.

These coils should sit about 1/8" maximum above the PC board when

soldered.

 86. Install R10, 51 ohm (green-brown-black). Notice that this resistor

stands up.

 87. Install C31, .001 uF disc cap (marked .001 or 102).

 88. Install L12, one of the small 3 turn ferrite bead RF chokes you

wound. Pull it up snug against the PC board and solder.

 89. Install C10, 47 pf disc capacitor (marked 47 or 47K).

 90. Install C18, 22 pf disc capacitor (marked 22 or 22K).

 91. Install Q5, 2N3866 metal can RF transistor. Be sure you press the

transistor case flush against the PC board and solder securely.

 92. Install L6, a 6 hole ferrite bead choke wound previously.

 93. Install C4, .01 uf disc capacitor (marked .01 or 10 nf or 103).

 94. Install L11, pink slug tuned coil.

 95. Install aluminum shield can cover over L11.

 96. Install C2, 100 to 220 uf electrolytic capacitor. Be sure to observe

polarity - especially with this part since it is directly across the power

supply and if reversed, could overheat so fast, so much, that it could

explode!

 97. Form and install jumper JMP6. Be sure to keep the following jumpers

as short as possible due to their proximity to the RF amplifier transistors.

 98. In the same way install jumper JMP5.

 99. Next we’ll install Q8, the 2N5193 power PNP transistor. Notice that

This is the

front side and

faces toward

JMP5 and

R19.

2N5193

E C B

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Ramsey Electronics HR40 Manual de Instruções Página 17

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