Ramsey Electronics FX Series Manual page 84

E20. Install R35, upright, 100K ohm (brown-black-yellow). R35 is
between positions for D5 and C62.
Steps E1-E20 are presented as a group primarily as a help in visualizing the
location of the VCO on the PC board. You have built up the VCO itself and
the capacitance multiplier voltage filter provided by C40, Q4, etc. After
double-checking the accuracy of your work, proceed with installing the VCO
related components in Stage F.
Stage F: VCO Buffers, PLL Synthesizer, ÷65/64 Prescaler
Install the following group of parts for Q5:
F1. C45, .01 uf disc capacitor (marked .01 or 103)
F2. C52, .001 uf disc capacitor (marked .001 or 102).
F3. R26, 51 ohms, (green-brown-black).
F4. R27, 47K, upright (yellow-violet-orange).
F5. R20, 270 ohm, upright (red-violet-brown).
F6. R23, 100 ohm, upright (brown-black-brown) has
two single hole ferrite beads strung on its upright
lead as shown. Simply slip the beads over the lead
wire and install the part.
F7. Install Q5, NPN type 2SC2498. Be sure to
select the correct transistor type and to orient the flat
side as pictured.
Install these capacitors associated with U3:
F8. C46, 100 pf disc capacitor (marked 100 or 101).
F9. C50, 100 pf disc capacitor (marked 100 or 101).
F10. C38 and C57, both .001 uf (marked .001 or 102).
F11. Install C32, 100 pf disc capacitor (marked 100 or 101).
F12. Install Q16, NPN type 2SC2498. Be sure to select the correct
transistor type and to orient the flat side as pictured.
F13. Install R106, 10K ohm (brown-black-orange).
F14. Install R105, 100 ohm (brown-black-brown).
F15. Install L21 near R105. This .33 uH. molded inductor is quite small,
green body with 2 orange stripes. Before soldering, make sure there is
no excess wire length above the board.