Difference between revisions of "SSB6 Design"
Jump to navigation
Jump to search
Blwikiadmin (talk | contribs) |
Blwikiadmin (talk | contribs) (→Build) |
||
| (9 intermediate revisions by the same user not shown) | |||
| Line 24: | Line 24: | ||
[[file:W7ZOI_SSB6_Curve.PNG]] | [[file:W7ZOI_SSB6_Curve.PNG]] | ||
| − | == | + | == Build == |
| − | * SSB6 filter is too big for Kits and Parts board | + | * SSB6 filter is too big for [[W7ZOI_Filters_on_Kits_and_Parts_Boards|Kits and Parts board]] (5 crystals limit) |
* 2500 Hz bandwidth | * 2500 Hz bandwidth | ||
| − | + | ||
| − | + | [[file:FT37-43_10_turns_9MHz.PNG]] | |
| + | |||
| + | === Schematic === | ||
[[file:SSB6_SCHEMATIC.PNG]] | [[file:SSB6_SCHEMATIC.PNG]] | ||
| + | |||
| + | === 3D Image === | ||
[[FILE:SSB6_3D_ANGLED.png]] | [[FILE:SSB6_3D_ANGLED.png]] | ||
| − | [[file: | + | === Measured Crystal Values === |
| + | |||
| + | <pre> | ||
| + | Number Freq Delta from average | ||
| + | 09 8.997791 -7.7 | ||
| + | 12 8.997791 -7.7 | ||
| + | 41 8.997793 -5.7 | ||
| + | 06 8.997794 -4.7 | ||
| + | 21 8.997798 -0.7 | ||
| + | 38 8.997798 -0.7 | ||
| + | </pre> | ||
| + | |||
| + | === Enclosure 80x50x20 === | ||
| + | |||
| + | * Fits in 80x50 extruded enclosure | ||
| + | * Material: Aluminum | ||
| + | * Color: black | ||
| + | * Size: approx.80*50*20mm | ||
| + | * Thickness: approx.1mm | ||
| + | |||
| + | [[file:Enclosure-80x50x20.jpg]] | ||
== References == | == References == | ||
| Line 44: | Line 68: | ||
* [http://jvgavila.com/other/Crystal_Test_Set.pdf A Practical Test Set for Comprehensive Crystal Testing] | * [http://jvgavila.com/other/Crystal_Test_Set.pdf A Practical Test Set for Comprehensive Crystal Testing] | ||
* [http://pages.suddenlink.net/wa5bdu/crystal_slide_show.pdf Crystal characterization and crystal filter design] | * [http://pages.suddenlink.net/wa5bdu/crystal_slide_show.pdf Crystal characterization and crystal filter design] | ||
| − | * [http://www.hanssummers.com/xtalchar.html Crystal parameters Written by Hans Summers] | + | * [http://www.hanssummers.com/xtalchar.html Crystal parameters Written by Hans Summers (QRP Labs)] |
== Sorted crystals table == | == Sorted crystals table == | ||
Revision as of 20:58, 15 October 2021
Contents
Design
- 6 element filter
- W7ZOI Crystal Filter paper has several crystal filter designs
- Narrow bandwidth bandpass filters for SSB
- Used for transmit/receive
- 9 MHz nominal frequency
- 50 Ohms in/out impedance
- 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
- W7ZOI Filters on Kits and Parts Boards
- Other filter builds
- 5 or less crystals
W7ZOI SSB6 Schematic
- Response curve
Build
- SSB6 filter is too big for Kits and Parts board (5 crystals limit)
- 2500 Hz bandwidth
Schematic
3D Image
Measured Crystal Values
Number Freq Delta from average 09 8.997791 -7.7 12 8.997791 -7.7 41 8.997793 -5.7 06 8.997794 -4.7 21 8.997798 -0.7 38 8.997798 -0.7
Enclosure 80x50x20
- Fits in 80x50 extruded enclosure
- Material: Aluminum
- Color: black
- Size: approx.80*50*20mm
- Thickness: approx.1mm
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 (QRP Labs)
