Difference between revisions of "W7ZOI Filters on Kits and Parts Boards"
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[[file:XTAL_Filters_P1839-720px.jpg]] | [[file:XTAL_Filters_P1839-720px.jpg]] | ||
− | + | == W7ZOI Filter Builds == | |
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* [http://w7zoi.net/filters/9megxfils.pdf W7ZOI Crystal Filter paper] has several crystal filter designs | * [http://w7zoi.net/filters/9megxfils.pdf W7ZOI Crystal Filter paper] has several crystal filter designs | ||
+ | ** Easy to build onto Kits and Parts board | ||
* Narrow bandwidth bandpass filters for CW or SSB | * Narrow bandwidth bandpass filters for CW or SSB | ||
** Used for transmit/receive | ** Used for transmit/receive | ||
− | * 9 MHz nominal frequency | + | * [https://www.mouser.com/ProductDetail/449-LFXTAL064523BULK 9 MHz nominal frequency] |
* Bin crystals using [[Colpitts Crystal Oscillator]] | * Bin crystals using [[Colpitts Crystal Oscillator]] | ||
** Hand select close values from a pile of crystals | ** Hand select close values from a pile of crystals | ||
** Can get much closer than 10% of bandwidth with 50 crystals | ** Can get much closer than 10% of bandwidth with 50 crystals | ||
* Use [https://kitsandparts.com/XF.php Kits and Parts Crystal Filter (XF2) cards] for 3-5 crystal filters ($4 each) | * Use [https://kitsandparts.com/XF.php Kits and Parts Crystal Filter (XF2) cards] for 3-5 crystal filters ($4 each) | ||
− | ** Needs some cuts/jumpers | + | ** Needs some cuts/jumpers for CW5 filter |
* [http://w7zoi.net/filters/9megxfils.pdf 9 MHz Filters With Inexpensive Crystals] - W7ZOI paper | * [http://w7zoi.net/filters/9megxfils.pdf 9 MHz Filters With Inexpensive Crystals] - W7ZOI paper | ||
+ | |||
+ | * Kits and Parts Board Schematic | ||
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+ | [[file:XF2.SCH.png]] | ||
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+ | * Kits and Parts Board PCB | ||
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+ | [[file:XF2.PCB.png]] | ||
=== CW3 Crystal Filter on Kits and Parts Board === | === CW3 Crystal Filter on Kits and Parts Board === | ||
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[[file:XTAL-CW3_Crystals.PNG]] | [[file:XTAL-CW3_Crystals.PNG]] | ||
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* Modified K&P schematic | * Modified K&P schematic | ||
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[[FILE:XF2_CW3_SCH.PNG]] | [[FILE:XF2_CW3_SCH.PNG]] | ||
− | * | + | * W7ZOI Measurements |
− | [[file: | + | [[file:W7ZOI_CW3_Measured.PNG]] |
* NanoVNA Capture / Analysis | * NanoVNA Capture / Analysis | ||
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[[file:PartsAndKits_9MHz_CW3_NanoVNA-BP-Measurements.PNG]] | [[file:PartsAndKits_9MHz_CW3_NanoVNA-BP-Measurements.PNG]] | ||
− | === | + | === CW5 Crystal Filter on Kits and Parts Board === |
[[FILE:P1070818-720px.jpg]] | [[FILE:P1070818-720px.jpg]] | ||
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[[file:XTAL-CW-5Crystals.PNG]] | [[file:XTAL-CW-5Crystals.PNG]] | ||
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* XF2 Modifications | * XF2 Modifications | ||
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** Add wire across C8 | ** Add wire across C8 | ||
− | [[file: | + | * W7ZOI Measurements |
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+ | [[file:CW5_W7ZOI_MEASUREMENTS.PNG]] | ||
* NanoVNA Capture / Analysis | * NanoVNA Capture / Analysis | ||
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[[file:PartsAndKits_9MHz_CW3csCW5_SKIRTS_NanoVNA.PNG]] | [[file:PartsAndKits_9MHz_CW3csCW5_SKIRTS_NanoVNA.PNG]] | ||
− | === | + | === SSB4 Crystal Filter on Kits and Parts Board === |
[[file:P142-720px.jpg]] | [[file:P142-720px.jpg]] | ||
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[[file:XTAL-SSB-4Crystals.PNG]] | [[file:XTAL-SSB-4Crystals.PNG]] | ||
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* XF2 Modifications | * XF2 Modifications | ||
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[[File:XF2.PCB.png]] | [[File:XF2.PCB.png]] | ||
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+ | * W7ZOI Measurements | ||
+ | |||
+ | [[FILE:W7ZOI_CURVE.PNG]] | ||
* NanoVNA Capture / Analysis | * NanoVNA Capture / Analysis | ||
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* [https://kitsandparts.com/XF.php Kits and Parts dot Com Crystal Filter] | * [https://kitsandparts.com/XF.php Kits and Parts dot Com Crystal Filter] | ||
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=== Schematic === | === Schematic === | ||
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[[file:XTAL-CW-5Crystals.PNG]] | [[file:XTAL-CW-5Crystals.PNG]] | ||
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=== Notes === | === Notes === | ||
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| -7.7 | | -7.7 | ||
| 7.7 | | 7.7 | ||
− | | | + | | SSB6 |
|- | |- | ||
| 12 | | 12 | ||
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| -7.7 | | -7.7 | ||
| 7.7 | | 7.7 | ||
− | | | + | | SSB6 |
|- | |- | ||
| 41 | | 41 | ||
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| -5.7 | | -5.7 | ||
| 5.7 | | 5.7 | ||
− | | | + | | SSB6 |
|- | |- | ||
| 06 | | 06 | ||
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| -4.7 | | -4.7 | ||
| 4.7 | | 4.7 | ||
− | | | + | | SSB6 |
|- | |- | ||
| 21 | | 21 | ||
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| -0.7 | | -0.7 | ||
| 0.7 | | 0.7 | ||
− | | | + | | SSB6 |
|- | |- | ||
| 38 | | 38 | ||
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| -0.7 | | -0.7 | ||
| 0.7 | | 0.7 | ||
− | | | + | | SSB6 |
|- | |- | ||
| 07 | | 07 |
Latest revision as of 12:00, 15 October 2021
Contents
W7ZOI Filter Builds
- W7ZOI Crystal Filter paper has several crystal filter designs
- Easy to build onto Kits and Parts board
- Narrow bandwidth bandpass filters for CW or SSB
- Used for transmit/receive
- 9 MHz nominal frequency
- Bin crystals using Colpitts Crystal Oscillator
- Hand select close values from a pile of crystals
- Can get much closer than 10% of bandwidth with 50 crystals
- Use Kits and Parts Crystal Filter (XF2) cards for 3-5 crystal filters ($4 each)
- Needs some cuts/jumpers for CW5 filter
- 9 MHz Filters With Inexpensive Crystals - W7ZOI paper
- Kits and Parts Board Schematic
- Kits and Parts Board PCB
CW3 Crystal Filter on Kits and Parts Board
- 9 MHz nominal
- Measured values
- 8.997836
- 8.997836
- 8.997838
- 330 Hz bandwidth
- 50 Ohms in/out - no transformers needed
- Built onto Kits and Parts board
- Schematic from W7ZOI paper
- Modified K&P schematic
- W7ZOI Measurements
- NanoVNA Capture / Analysis
- Bandwidth
- 400 Hz -3dB measured
- 600 Hz -6dB measured
CW5 Crystal Filter on Kits and Parts Board
- 9 MHz nominal
- Measured crystal values
- 8.997782
- 8.997783
- 8.997784
- 8.997784
- 8.997785
- 500 Hz bandwidth
- Input output transformer
- 50:200 Ohms
- 10 bifilar turns #28 on FT-37-43
- Built onto Kits and Parts board
- Schematic from W7ZOI paper
- XF2 Modifications
- K&P Board
- Cut etch from X2 to X3
- Cut etch from X4 to X6
- Add wire across C1
- Add wire across C8
- W7ZOI Measurements
- NanoVNA Capture / Analysis
CW3 VS CW5 Filter NanoVNA Comparison
- CW3 = 330 Hz bandwidth
- CW5 = 500 Hz bandwidth
- 5 KHz span
- 5 Crystal filter is wider in bandpass but has sharper skirts than the 3 crystal filter
SSB4 Crystal Filter on Kits and Parts Board
- 9 MHz nominal
- Measured crystal values
- 8.997800
- 8.997801
- 8.997802
- 8.997803
- 2KHz bandwidth
- Input output transformer
- 50:200 Ohms
- 10 bifilar turns #28 on FT-37-43
- Built onto Kits and Parts board
- Schematic from W7ZOI paper
- XF2 Modifications
- K&P Board
- Cut etch from X1 to X2
- Add wire across C1
- Add wire across C8
- Add wire across C9
- Install X1 at X1a position
- W7ZOI Measurements
- NanoVNA Capture / Analysis
References
- Crystal ladder filters – Software
- Crystal Ladder Filters for All - ARRL QEX
- DISHAL software by DJ6EV
- A Practical Test Set for Comprehensive Crystal Testing
- Crystal characterization and crystal filter design
- Crystal parameters Written by Hans Summers
Kits and Parts dot Com Crystal Filter Kit
Schematic
Notes
- T1 & T2 are optional matching transformers.
- Typical transformer type will be a BN-43-2402 using 34 gauge magnet wire
- C3a,C4a,C5a,C6a are optional trimmer capacitors for fine tuning the crystal filter
- Typical trimmer caps are GKG50015
Parts
Caps
Capacitance (pF) | Mfr. # | Manufacturer | Description |
---|---|---|---|
10 | S100K33SL0R63K7R | Vishay | Ceramic Disc Capacitors 10pF 3000V 10% SL0 7.5mm LS |
33 | CC45SL3AD330JYNNA | TDK | Ceramic Disc Capacitors D: 5.5mm 1kV 33pF SL 5% LS:5mm |
47 | CC45SL3AD470JYVNA | TDK | Ceramic Disc Capacitors D: 5.5mm 1kV 47pF SL 5% LS:5mm |
82 | CC45SL3AD820JYNNA | TDK | Ceramic Disc Capacitors D: 6mm 1kV 82pF SL 5% LS:5mm |
100 | CC45SL3AD101JYNNA | TDK | Ceramic Disc Capacitors D: 6.5mm 1kV 100pF SL 5% LS:5mm |
120 | CC45SL3AD121JYNNA | TDK | Ceramic Disc Capacitors D: 7mm 1kV 120pF SL 5% LS:5mm |
200 | S201K33S3NN63L6R | Vishay | Ceramic Disc Capacitors 200PF 1KV 10% |
270 | CC45SL3AD271JYVNA | TDK | Ceramic Disc Capacitors D: 9mm 1kV 270pF SL 5% LS:5mm |
330 | S331K33Y5PR63K7R | Vishay | Ceramic Disc Capacitors 330pF 3000V 10% Y5P 7.5mm LS |
390 | CC45SL3AD391JYVNA | TDK | Ceramic Disc Capacitors D: 10.5mm 1kV 390pF SL 5% LS:5mm |
470 | D471K20Y5PH6UJ5R | Vishay | Ceramic Disc Capacitors 470pF 100V 10% |
680 | S681K29Y5PN63J5R | Vishay | Ceramic Disc Capacitors 680pF 1000V 10% Y5P 5.0mm LS |
Sorted 9 MHz Crystals
- Bought 50 crystals
- Marked with numbered labels
- Mouser #: 449-LFXTAL064523BULK
- Mfr. #: LFXTAL064523Bulk
- Mfr.:IQD
- Description: Crystals 9MHz 30pF -10C 60C
- Datasheet
Number | Freq | Delta Freq | Abs delta f | |
---|---|---|---|---|
33 | 8.997668 | -130.7 | 130.7 | |
43 | 8.997704 | -94.7 | 94.7 | |
17 | 8.997707 | -91.7 | 91.7 | |
42 | 8.997707 | -91.7 | 91.7 | |
40 | 8.997726 | -72.7 | 72.7 | |
03 | 8.997733 | -65.7 | 65.7 | |
36 | 8.997742 | -56.7 | 56.7 | |
23 | 8.997753 | -45.7 | 45.7 | |
25 | 8.997755 | -43.7 | 43.7 | |
05 | 8.997761 | -37.7 | 37.7 | |
27 | 8.997767 | -31.7 | 31.7 | |
15 | 8.997776 | -22.7 | 22.7 | |
39 | 8.997782 | -16.7 | 16.7 | CW5 |
35 | 8.997783 | -15.7 | 15.7 | CW5 |
10 | 8.997784 | -14.7 | 14.7 | CW5 |
18 | 8.997784 | -14.7 | 14.7 | CW5 |
04 | 8.997785 | -13.7 | 13.7 | CW5 |
20 | 8.997788 | -10.7 | 10.7 | |
49 | 8.997788 | -10.7 | 10.7 | |
09 | 8.997791 | -7.7 | 7.7 | SSB6 |
12 | 8.997791 | -7.7 | 7.7 | SSB6 |
41 | 8.997793 | -5.7 | 5.7 | SSB6 |
06 | 8.997794 | -4.7 | 4.7 | SSB6 |
21 | 8.997798 | -0.7 | 0.7 | SSB6 |
38 | 8.997798 | -0.7 | 0.7 | SSB6 |
07 | 8.997800 | 1.3 | 1.3 | |
32 | 8.997800 | 1.3 | 1.3 | SSB4 |
14 | 8.997801 | 2.3 | 2.3 | SSB4 |
47 | 8.997802 | 3.3 | 3.3 | SSB4 |
34 | 8.997803 | 4.3 | 4.3 | SSB4 |
08 | 8.997809 | 10.3 | 10.3 | |
30 | 8.997810 | 11.3 | 11.3 | |
48 | 8.997812 | 13.3 | 13.3 | |
50 | 8.997814 | 15.3 | 15.3 | |
31 | 8.997818 | 19.3 | 19.3 | |
46 | 8.997822 | 23.3 | 23.3 | |
22 | 8.997825 | 26.3 | 26.3 | |
26 | 8.997836 | 37.3 | 37.3 | CW3 |
44 | 8.997836 | 37.3 | 37.3 | CW3 |
28 | 8.997838 | 39.3 | 39.3 | CW3 |
02 | 8.997840 | 41.3 | 41.3 | |
45 | 8.997840 | 41.3 | 41.3 | |
29 | 8.997846 | 47.3 | 47.3 | |
19 | 8.997851 | 52.3 | 52.3 | |
01 | 8.997858 | 59.3 | 59.3 | |
24 | 8.997858 | 59.3 | 59.3 | |
11 | 8.997868 | 69.3 | 69.3 | |
16 | 8.997872 | 73.3 | 73.3 | |
13 | 8.997879 | 80.3 | 80.3 | |
37 | 8.997937 | 138.3 | 138.3 | |
Average | 8.997799 | Deviation | 36.34 |