Difference between revisions of "Apollo - Development Discussion"
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The initial [[APOLLO]] schematic is available for comment and suggestions are desired. Please place them here or email to the mailing list [mailto:hpsdr@lists.openhpsdr.org hpsdr@lists.openhpsdr.org] or direct email to [mailto:la2ni@online.no Kjell Karlsen] | The initial [[APOLLO]] schematic is available for comment and suggestions are desired. Please place them here or email to the mailing list [mailto:hpsdr@lists.openhpsdr.org hpsdr@lists.openhpsdr.org] or direct email to [mailto:la2ni@online.no Kjell Karlsen] | ||
[[Image:Apollo_Schematic_rev_1A-2.jpg|thumb|400px|Rev 1A, page 2, of the Apollo schematic. Click for larger images.]] | [[Image:Apollo_Schematic_rev_1A-2.jpg|thumb|400px|Rev 1A, page 2, of the Apollo schematic. Click for larger images.]] | ||
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| − | + | Update 18 December 2009, here is a high resolution picture of Kjell's alpha Apollo board, looking very good :) | |
| − | + | : [[media:Apollo_PCB_003.jpg|High Res Alpha.jpg]]. | |
| − | + | ---- | |
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| − | + | Update 16 December 2009, the latest schematics can be found here : [[media:Apollo151209.pdf|PDF Rev 1D Schematic]]. | |
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| + | * The New PDF version of the schematic is here: [[media:Apollo_Schematic_rev_1A.pdf|PDF Rev 1A Schematic]]. | ||
| − | + | * The Silkscreen Top here: [[media:Apollo_silk_top.pdf|Silkscreen Top, Rev 1A]]. | |
| + | * The Silkscreen Bottom is here: [[media:ApolloSilkBottom.pdf|Silkscreen Bottom, Rev 1A]]. | ||
| − | + | * The PCB Top here: [[media:ApolloPCBTop.pdf|PCB Top, Rev 1A]]. | |
| − | + | * The PCB Bottom is here: [[media:ApolloPCBBottom.pdf|PCB Bottom, Rev 1A]]. | |
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| + | Added for '''LA2NI, Kjell''' by -- [[User:KV0S|KV0S, Dave]] 16:38, 10 October 2009 (UTC) | ||
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Latest revision as of 12:36, 28 December 2012
The initial APOLLO schematic is available for comment and suggestions are desired. Please place them here or email to the mailing list hpsdr@lists.openhpsdr.org or direct email to Kjell Karlsen
Update 18 December 2009, here is a high resolution picture of Kjell's alpha Apollo board, looking very good :)
Update 16 December 2009, the latest schematics can be found here : PDF Rev 1D Schematic.
- The New PDF version of the schematic is here: PDF Rev 1A Schematic.
- The Silkscreen Top here: Silkscreen Top, Rev 1A.
- The Silkscreen Bottom is here: Silkscreen Bottom, Rev 1A.
- The PCB Top here: PCB Top, Rev 1A.
- The PCB Bottom is here: PCB Bottom, Rev 1A.
Added for LA2NI, Kjell by -- KV0S, Dave 16:38, 10 October 2009 (UTC)
The original PDF version of the schematic is here: PDF rev 0 Schematic.
Three comments:
- I believe the interface is SPI rather than I2C for the TPIC595 latches.
- 74HC14 can be used in lieu of 74HC04. The '14 has Schmitt trigger inputs, might help with noise immunity on the control line(s).
- Suggest considering PIN diode antenna switching instead of a relay (RL15). For those who operate CW QSK, quiet is nice. It's even nice for those who don't :-). KK7P 21:22, 14 June 2009 (UTC)
- Another comment: An Elecraft T-1 could also be accommodated at these power levels as an alternative to the suggested LDG. Disclaimer: I work for Elecraft. KK7P 05:02 31 July 2009 (UTC)
