DDS VFO PARTS LIST

1. Install 2 (two) 20 pin integrated circuit sockets (2 required) -                  649-DILB20P-223TLF  -     Cost: $.84
2. Install 1 (on 5 volt regulator - LM7805  -                                               LM7805CT/NOPB  -           Cost:  $1.70
3. Install D1 (1N4001 - or equiv)                                                              833-1N4001-TP -                Cost $.21
4. Install  D2 (1N4148)                                                                            512-1N4148 -                       Cost. $. 10
5. Install 8 (eight) mf capacitors (C1, C3, C4, C6, C9, C16, C17, C18)   594-K104Z15Y5VE5TL2     Costs: $1.16 (discounted cost for 10 units)
6. Install 2 (two) .01 mf capacitors (C8, C15)                                           80-C324C103K3G5TA        Cost $.98
7. Install 2 (two) 100 uh inductors (L4, L5)                                               434-22-101K                         Cost $.82
8. Install 5 (five) 1K, 1/4 watt resistors (R1, R2, R4, R9, R11                   279-LR0204F1K0                 Cost $.65
9. Install 1 (one) 3.9k 1/4 watt resistor (R3)                                              603-MFR-25FRF52-3K9      Cost $.10
10. Install 4 (four) 10 K, 1/4 watt resistors (R5, R6, R15, R16)                  CCF5510K0FKE36               Cost: $.84
11. Install 1 (one) 27 ohm, 1/4 watt resistor (R12)

• Mouser: 603-MFR-25FRF52-27R
• Cost: $.35

      17.  Install 2 (two) 470 1/4 watt resistors (R10, R19)

• Mouser: 603-MFR25SFTF52-470R
• Cost: $.22

      18. Install 1 (one) 100 ohn, 1/4 watt resistor (R8)

• Mouser: 660-MF1/4DCT52R1000F
• Cost: $.10

     19.  Install the 10 K trimmer resisor (R18) - used to adjust the DDS amplifier output level - max output possible is 6.0 VAC, peak-to-peak.

• Mouser:  652-3296W-1-103LF
• Cost: $ 2.88

       20.  Install 2 (two) 100 ohm 1/4 watt resistors (R7, R13) - part of 7 Mhz Butterworth Filter

• Mouser: 660-MF1/4DCT52R1000F
• Cost: $.20

       21.  Install 2 (two) 390 pf capacitors (C10, C12) - part of 7 Mhz Butterworth Filter

• Mouser:  80-C318C391K3G5TA
• Cost; $.88

      22. Install 2 (two) 100 pf capacitors (C7, C13) - part of 7 Mhz Butterworth Filter

• Mouser:  80-C315C101J3G5TA
• Cost: $.90

      23.  Install 2 (two) 2.7 uh inductors (L1, L3) - part of 7 mhz Butterworth Filter

• Mouser:  542-78F2R7-RC
• Cost: $.66

      24.  Install 1 (one) 4.7 uh inductors (L2) - part of Butterworth Filter

• Mouser:  542-78F4R7-RC
• Cost: $ .33

      25.  Install 2 (two) 10uf 25 volt electrolytics (C2, C5) - observe the polaity 

• Mouser:  232-25TWL10MEFC5X7
• Cost: $.76

     26.  Install 2 (two) PN2222A (or equivalent) transistors (Q1, Q2)

• Mouser: 583-PN2222A-T
• Cost: $.82

     27. Install pin header connectors at the following points:

• Pin headers are available from Mouser or from eBay (cut a large header to fit)
• Mouser:  932-MIKROE-1316 - $.73

•     Power - JP-1 - 2 pin
•     Lock / Store  - 2 pins
•     Program         not required - for in-circuit programming purposes only.
•     Encoder        - 4 pins
•     RIT               - 3 pins
•     Buttons          - 5 pins
•     LEDS            - 3 pins
•     FREQ OUT  - 2 pins
•    +5VDC          - 1 pin - used for the LED's

    You'll also need:

• AD9850 DDS Assembly (purchase from eBay, Amazon and from other sources - surf the web).  A fully assembled unit costs around $20, and sometimes even less - shipped free to your home.  Google the internet for options. Amazon is also an excellent source.
• Cost: approx - $20 - varies. 

• Optical encoder w/Knob - (eBay is an excellent source).   The optical encoder I used is a Bourns ENJ1A-B28-L00128L, purchased brand new on eBay relatively inexpensively ($21).  It outputs 128 quadrature pulses per revolution which the PIC decodes as 512 changes of state per revolution.  So, 512 state changes (per revolution) x 10 hz for each state change =  5.1 khz  frequency step for each complete (360 degrees) encoder revolution.  Optical encoders with higher state changes per revolution will obviously result in larger frequency steps per revolution.  

• Light Emitting Diodes (3)
• Mouser : 941-C503BBCNCW0Y0452 - or equivalent
• VFO A
• VFO B
• SPLIT

• SPST Push Buttons - - buy from either Mouser or eBay.
• VFO Toggle
• SPLIT Function
• FAST Tuning Select (hold for fast tuning)

• SPST Switch - activates the RIT

• 20K (or so) linear taper potentiometer (with knob) which serves as the RIT control.

• (Optional) Sloping Panel Enclosure
• Mouser: 1456CE3BKBU
• Cost: $22.29