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#synth ref frequency 6 messages
#synth
Hi Alan 27MHz was required for my algorithm to get the WSPR tone spacing exact on 2m. On all lower bands than that, 25MHz or 27MHz both produced exact solutions. Therefore I chose to use the 27MHz cry
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Hi Alan 27MHz was required for my algorithm to get the WSPR tone spacing exact on 2m. On all lower bands than that, 25MHz or 27MHz both produced exact solutions. Therefore I chose to use the 27MHz cry
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By
Hans Summers
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Question Regarding Si5351A Synth (REV 4) build for 3.3v operation 3 messages
#si5351a
#synth
Mikael : I suspected that those resistors were acting as pullups and that explained why there were no instructions to remove them. Thanks for confirming that. Cheers Michael VE3WMB P.S. I am enjoying
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Mikael : I suspected that those resistors were acting as pullups and that explained why there were no instructions to remove them. Thanks for confirming that. Cheers Michael VE3WMB P.S. I am enjoying
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By
Michael Babineau
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Extra parts in my OCXO/Si5351A synthesizer module kit 6 messages
#synth
#ocxo
#si5351a
Wow, I think I have both of them Hans! Now I need to come up with a project to use the 10 Mhz crystal. I wouldn't mind sending them back but I suspect postage would be prohibitive.
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Wow, I think I have both of them Hans! Now I need to come up with a project to use the 10 Mhz crystal. I wouldn't mind sending them back but I suspect postage would be prohibitive.
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By
John Canfield
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frequency calculation FP error? 2 messages
#u3s
#synth
Typo: Instead of "492, ...518, and ...497", I meant "492, ...497, and ...518". Oops. -HF
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Typo: Instead of "492, ...518, and ...497", I meant "492, ...497, and ...518". Oops. -HF
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By
HF
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si5351a 6 messages
#synth
Hans, Had a crystal oscillator issue a few years ago that cause a lot of head scratching. We had been producing said module for several years with no problems, when suddenly we had a rash of dead modu
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Hans, Had a crystal oscillator issue a few years ago that cause a lot of head scratching. We had been producing said module for several years with no problems, when suddenly we had a rash of dead modu
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By
Dave New, N8SBE
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OCXO kit - programming Si5351 registers. 1 messages
#firmware
#synth
Am a masochistic PIC programmer, calculating the Si5351 parameters in raw assembler. Yeah - painful, but I enjoy doing weird math. Sticking with Hans' approach where Silicon Labs AN619 app-note "a+b/c
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Am a masochistic PIC programmer, calculating the Si5351 parameters in raw assembler. Yeah - painful, but I enjoy doing weird math. Sticking with Hans' approach where Silicon Labs AN619 app-note "a+b/c
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By
Glen Leinweber
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#u3s #synth 27MHz Crystal on Si5351 module failure? U3S just showing boxes... 9 messages
#u3s
#synth
Thanks Hans for clearing up the module's behavior when 'out of circuit.' As I alluded to in the other thread I mistakenly created, the module is currently working and my U3S has been running overnight
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Thanks Hans for clearing up the module's behavior when 'out of circuit.' As I alluded to in the other thread I mistakenly created, the module is currently working and my U3S has been running overnight
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By
Al Holt
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#u3s #synth 27MHz Crystal on Si5351 module failure? U3S just showing boxes... (psst....It's working again!) 3 messages
#u3s
#synth
Al, The "Subject" line is the topic. Add to it, or change it produces a new topic. (Unless there is a way to add something without changing the topic?) 73 Alan G4ZFQ
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Al, The "Subject" line is the topic. Add to it, or change it produces a new topic. (Unless there is a way to add something without changing the topic?) 73 Alan G4ZFQ
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By
Alan G4ZFQ
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NDB / Navtex Rx with QRP Labs modules 1 messages
#polyphase
#synth
#qlg
#rcvr
#vfo
I wanted to free up my IC7000 for "real" work so I purchased a few kits / modules from QRP Labs hoping to build a dedicated NDB / Navtex (and/or DGPS) receiver. The result is a GPS disciplined VFO dri
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I wanted to free up my IC7000 for "real" work so I purchased a few kits / modules from QRP Labs hoping to build a dedicated NDB / Navtex (and/or DGPS) receiver. The result is a GPS disciplined VFO dri
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By
Brian - VA7BBG
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Writing incorrect data to the Si5351a registers - Destruction of a Synth module??? 3 messages
#synth
Thank you Hans! That is what I thought, just wanted to confirm that it was probably static and not mis-configuration... Oh well... I guess I zapped it... will have to order a new one since all my othe
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Thank you Hans! That is what I thought, just wanted to confirm that it was probably static and not mis-configuration... Oh well... I guess I zapped it... will have to order a new one since all my othe
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By
Colin Buckup
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Si5351A CLK0 Output Buffer 2 messages
#synth
Hi Bob When using ProgRock for the RX module you do not need to isolate the Clk0 output or provide any buffering. For some uses of the Si5351A, you may need to provide buffering/isolation. It all depe
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Hi Bob When using ProgRock for the RX module you do not need to isolate the Clk0 output or provide any buffering. For some uses of the Si5351A, you may need to provide buffering/isolation. It all depe
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By
Hans Summers
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