|
Failing Si5351 chip #40m #qcx+
#si5351a
#40m
Hi Shirley, I happened to have a breakout board at home so I tried it immediately this morning. And it works fine! 2 things to look at: - Don't forget to remove the old, not working Si5351. (of course
Hi Shirley, I happened to have a breakout board at home so I tried it immediately this morning. And it works fine! 2 things to look at: - Don't forget to remove the old, not working Si5351. (of course
|
By
ruud@...
· #63939
·
|
|
Failing Si5351 chip #40m #qcx+
#si5351a
#40m
Hi Bernie, Long time ago I tried to repair an SMT board. That was not a success to say the least! I made a big mess of it. I promised myself never to try that again! So I go for the Si5351 breakout bo
Hi Bernie, Long time ago I tried to repair an SMT board. That was not a success to say the least! I made a big mess of it. I promised myself never to try that again! So I go for the Si5351 breakout bo
|
By
ruud@...
· #63938
·
|
|
Failing Si5351 chip #40m #qcx+
#si5351a
#40m
Sorry to hear that your Si5351A appears to have failed. Aside from the difficulties of soldering that SMD chip, there is the catch that distributors have no stock and aren't expected to get any until
Sorry to hear that your Si5351A appears to have failed. Aside from the difficulties of soldering that SMD chip, there is the catch that distributors have no stock and aren't expected to get any until
|
By
Shirley Dulcey KE1L
· #63935
·
|
|
Failing Si5351 chip #40m #qcx+
#si5351a
#40m
Rudd You can replace the chip yourself. There are several posts on this group and excellent videos on YouTube on how to remove and replace SMT parts. All you really need is a really good pair of small
Rudd You can replace the chip yourself. There are several posts on this group and excellent videos on YouTube on how to remove and replace SMT parts. All you really need is a really good pair of small
|
By
Ham Radio
· #63930
·
|
|
Failing Si5351 chip #40m #qcx+
#si5351a
#40m
I just bought and assembled a qcx+ kit. I had the problem that the bpf filter did not peak. I did not get a nice square block signal from the Si5351. Then I got a "Si5351 error" message on the screen
I just bought and assembled a qcx+ kit. I had the problem that the bpf filter did not peak. I did not get a nice square block signal from the Si5351. Then I got a "Si5351 error" message on the screen
|
By
ruud@...
· #63925
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Here's my latest design notes (I should have included this with the pictures...) The ProgRock is designed to be a programmable crystal replacement. It uses an Si5351 synth board to generate pre-progra
Here's my latest design notes (I should have included this with the pictures...) The ProgRock is designed to be a programmable crystal replacement. It uses an Si5351 synth board to generate pre-progra
|
By
Mont Pierce KM6WT
· #57274
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Here are some pictures of the progress I've made so far. In the first two pics "parts top view" and "parts bottom view": The Synth board on the left (one with the crystal) plugs into the top of the Pr
Here are some pictures of the progress I've made so far. In the first two pics "parts top view" and "parts bottom view": The Synth board on the left (one with the crystal) plugs into the top of the Pr
|
By
Mont Pierce KM6WT
· #57272
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
A long time ago when updating the U3 to U3S it was necessary to remove pin 12 of the synth unit. I removed all mine and blocked the hole in the header. Then it will only go one way. Pin 12 remains red
A long time ago when updating the U3 to U3S it was necessary to remove pin 12 of the synth unit. I removed all mine and blocked the hole in the header. Then it will only go one way. Pin 12 remains red
|
By
Alan G4ZFQ
· #56442
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
That's a GREAT idea... If only I didn't already have all my Synth boards built... Every time I go to plug in a Synth board, I have to pause for a moment to think about orientation. Your way is so simp
That's a GREAT idea... If only I didn't already have all my Synth boards built... Every time I go to plug in a Synth board, I have to pause for a moment to think about orientation. Your way is so simp
|
By
Mont Pierce KM6WT
· #56441
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
When I built my last synth board, I used 1206 resistors in place of the vertically mounted components just to relieve the boredom of lockdown. Doesn't work for horizontally ones. No problems found and
When I built my last synth board, I used 1206 resistors in place of the vertically mounted components just to relieve the boredom of lockdown. Doesn't work for horizontally ones. No problems found and
|
By
geoff M0ORE
· #56411
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
My latest design path... I decided to keep the ProgRock in line as it has one feature I don't yet in my VFO code... GPS disciplined frequency control. For awhile I was struggling on the problem of whe
My latest design path... I decided to keep the ProgRock in line as it has one feature I don't yet in my VFO code... GPS disciplined frequency control. For awhile I was struggling on the problem of whe
|
By
Mont Pierce KM6WT
· #56386
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Sounds like a great idea to me.
Sounds like a great idea to me.
|
By
...
· #56378
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Actually, looking over ProgRock's circuit diagram, I don't think I even need the ProgRock board. I can simply connect one Si5351a Synth board's output clock 0 to the crystal input at pin 2 on the seco
Actually, looking over ProgRock's circuit diagram, I don't think I even need the ProgRock board. I can simply connect one Si5351a Synth board's output clock 0 to the crystal input at pin 2 on the seco
|
By
Mont Pierce KM6WT
· #56317
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
THANKS for pointing me in the right direction. I thought I saw something somewhere about "invert"ing the signal. I'm sure having a lot of fun with your kits. :) 73 km6wt
THANKS for pointing me in the right direction. I thought I saw something somewhere about "invert"ing the signal. I'm sure having a lot of fun with your kits. :) 73 km6wt
|
By
Mont Pierce KM6WT
· #56295
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Yes, that would work, if... I was only interested in getting to lower frequencies. Changing the crystal on the Si5351a breakout board also works to get lower frequencies. Hans did this for the 180m QC
Yes, that would work, if... I was only interested in getting to lower frequencies. Changing the crystal on the Si5351a breakout board also works to get lower frequencies. Hans did this for the 180m QC
|
By
Mont Pierce KM6WT
· #56293
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Yes, I saw that. But Hans is sometimes a super-perfectionist:-) I've used many Softrocks with 7474s and as I am sub-perfect they seem to me to work adequately. As for complexity, my suggestion is for
Yes, I saw that. But Hans is sometimes a super-perfectionist:-) I've used many Softrocks with 7474s and as I am sub-perfect they seem to me to work adequately. As for complexity, my suggestion is for
|
By
Alan G4ZFQ
· #56291
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
KM6WT I think you are right that if you use dividers for lower frequencies then the phase offset would be different for different division factors. Maybe a workable scheme might be to use division of
KM6WT I think you are right that if you use dividers for lower frequencies then the phase offset would be different for different division factors. Maybe a workable scheme might be to use division of
|
By
Arv Evans
· #56290
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Thanks for your input Arv. I did try that, and it works fine for a single clock. But if I remember right, I could not get two clocks at 90° phase shifted. Maybe I did something wrong, or missed someth
Thanks for your input Arv. I did try that, and it works fine for a single clock. But if I remember right, I could not get two clocks at 90° phase shifted. Maybe I did something wrong, or missed someth
|
By
Mont Pierce KM6WT
· #56287
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Hello Mont For 180-degree phase shift you just set Clk0 and Clk1 to both be sourced from PLL A, and both with 0 phase offset. Then simply set the Invert bit in the control register for one of them. It
Hello Mont For 180-degree phase shift you just set Clk0 and Clk1 to both be sourced from PLL A, and both with 0 phase offset. Then simply set the Invert bit in the control register for one of them. It
|
By
Hans Summers
· #56286
·
|
|
How to get more range out of the Si5351a
#si5351a
#progrock
#vfo
Perfect!! Thanks for your input Hans. AND for sharing all your research 3+ years ago. :) :) Yep, I was thinking the same thing. Probably easier then hooking up the serial port lines. In either case, I
Perfect!! Thanks for your input Hans. AND for sharing all your research 3+ years ago. :) :) Yep, I was thinking the same thing. Probably easier then hooking up the serial port lines. In either case, I
|
By
Mont Pierce KM6WT
· #56285
·
|