Ramsey Electronics FZ-146 Specifications download pdf (Page 84)

FX 146 • 84

 CR11. Install C8, .1 uf disc capacitor (marked .1 or 104).

 CR12. Install C13, .1 uf disc capacitor (marked .1 or 104).

 CR13. Install C14, 27 pf disc capacitor (marked 27).

 CR14. Install C26, .01 uf disc capacitor (marked .01 or 103).

 CR15. Install C6, .1 uf disc capacitor (marked .1 or 104).

 CR16. Install C7, 4.7 or 10 uf electrolytic. Watch polarity (or U1's audio

won't reach U2!) The polarity doesn't always show up on the silkscreen

so consult the pictorial for proper orientation.

 CR17. Install C13, .1 uf disc capacitor (marked .1 or 104).

 CR18. Select and install FL2, the rectangular plastic block with 3 thin

pins. It fits only one way. This is the 6 pole, ceramic 455 KHz IF filter

network. Verify that filter FL2 is properly seated and soldered. So far,

most disc capacitors installed have been from your endless supply of .01

and .001 capacitors. If you have not done so already, now would be a

good time to sort and organize all your "picofarad" capacitors, ranging in

value from 2 to 100 pf. Correct selection of these values will be essential

throughout the RF stages of your transceiver.

 CR19. Install C10, .001 uf. (marked .001 or 102).

 CR20. Install C15, .01 uf (marked .01 or 103).

 CR21. Install C12, 47 pf (marked 47).

 CR22. Select and install Y1, the 21.855 MHz. crystal. It must be snug

on the board before soldering. [Be sure not to confuse Y1 with Y2, the

10.240 MHz. crystal which will set the Reference Frequency for the PLL

Synthesizer, or with FL1, which has 3 wires.]

 CR23. Install L1, the 455 KHz shielded coil marked LB53303HK. Make

sure it is seated squarely on the board before soldering. Solder all pins.

 CR24. Install C101, 4.7 or 10 uf electrolytic, observe polarity.

Install these following resistors:

 CR25. Install R6, 3.3K ohm (orange-orange-red).

 CR26. Install R8, 47 ohm (yellow-violet-black).

 CR27. Install R2, 1K ohm (brown-black-red).

 CR28. Install R1, 220K ohm (red-red-yellow)

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Ramsey Electronics FZ-146 Specifications Page 84