开云体育

raduino problem

Aurelio IZ8EGM All Messages By This Member #34140 hi my raduino doesn't work again, checked it with frequenzy counter on the outout signal, the frequenzy go up and down isn't stable. infact the rtx don't work, to made a test i have used a rf generator into VFO input and the rtx start to give a good power out. i think there is a problem on my raduino board. the nano is able to program infact i download the last sketch for it. do you think is the chip 5351 the problem? thank you 73 Aurelio IZ8EGM
Ashhar Farhan All Messages By This Member #34142 have you connected the tuning pot to it? the frequency will drift without it ?being connected. - f toggle quoted message Show quoted text On Wed, Nov 1, 2017 at 10:32 PM, sarnese via Groups.Io <sarnese@...> wrote: hi my raduino doesn't work again, checked it with frequenzy counter on the outout signal, the frequenzy go up and down isn't stable. infact the rtx don't work, to made a test i have used a rf generator into VFO input and the rtx start to give a good power out. i think there is a problem on my raduino board. the nano is able to program infact i download the last sketch for it. do you think is the chip 5351 the problem? thank you 73 Aurelio IZ8EGM
Claudio Pantanella All Messages By This Member #34143 Hi, check its funcionality too toggle quoted message Show quoted text Il 01 nov 2017 18:49, "Ashhar Farhan" <farhanbox@...> ha scritto: have you connected the tuning pot to it? the frequency will drift without it ?being connected. - f On Wed, Nov 1, 2017 at 10:32 PM, sarnese via Groups.Io <sarnese@...> wrote: hi my raduino doesn't work again, checked it with frequenzy counter on the outout signal, the frequenzy go up and down isn't stable. infact the rtx don't work, to made a test i have used a rf generator into VFO input and the rtx start to give a good power out. i think there is a problem on my raduino board. the nano is able to program infact i download the last sketch for it. do you think is the chip 5351 the problem? thank you 73 Aurelio IZ8EGM
Larry Smith All Messages By This Member #34144 Re-seat P3 on Raduino module. Use a magnifying lens to inspect PCB solder connections on si5351 Check: P3 pin 14? is good Clk2 ? ? ? ? ? ? 11? ? ? "? ? ? ? Clk1 ? ? ? ? ? ? ?8? ? ? ?"? ? ? ? Clk0 also P3 pins 16 and 15 Ground are good connections Check where P3 socket pins are soldered for good solder joint (or solder bridge). Inspect all solder points on PCB? to look good.? ? ? Capacitor C5 ( 0.1uF ) is in good shape...Clk2 Check P3 wire crimps look good or use Oscilloscope to verify signals especially pin 14? ?Clk2 at the Raduino Check main PCD VFO connector for good connections from P3 14? ( Clk2 ) Hope this helps 73 toggle quoted message Show quoted text On Wed, Nov 1, 2017 at 12:02 PM, sarnese via Groups.Io <sarnese@...> wrote: hi my raduino doesn't work again, checked it with frequenzy counter on the outout signal, the frequenzy go up and down isn't stable. infact the rtx don't work, to made a test i have used a rf generator into VFO input and the rtx start to give a good power out. i think there is a problem on my raduino board. the nano is able to program infact i download the last sketch for it. do you think is the chip 5351 the problem? thank you 73 Aurelio IZ8EGM
Aurelio IZ8EGM All Messages By This Member #34146 yes i have connected it but the result don't change
Aurelio IZ8EGM All Messages By This Member #34147 hi Larry yes i have checked all your tips according with schematic the ground pin are 12 and 13 cheked with digital oscilloscope there isn't signal at pin 14 i think the si5351a don't work or it is damaged to use at moment the rtx i will found the original vfo on board to complete with L4 and C93. L4 wich toroid is? t37-6? how many turn i must made on it? thank you i will order a new si5351a to test the raduino board 73
Larry Smith All Messages By This Member #34152 From the HFSIGS.com He shows 50 turns for L4 and you will need the trim cap C93. I was reminded with Farhan suggestion on the tuning pot.? I have had a 10turn 10K pot open on my receiver and it did the random drift and jumping frequency.? I reconnected the original kit 10k provided and it proved to be the 10k 10 turn pot I had was open.?? I noticed before the 10k 10turn failed that the mechanical feel was getting rough as time went on then it opened. Replaced it with better pot. Also the Si5351 gets its 3.3v from the Nano on board regulator.? Pin 2 on the Nano should show 3.3 volts.? Could be a bad Nano.? Cheaper to replce the nano in that case. You can go to:? ? ? HFSIGS will show most everything there you may need. 73 toggle quoted message Show quoted text On Wed, Nov 1, 2017 at 1:25 PM, sarnese via Groups.Io <sarnese@...> wrote: hi Larry yes i have checked all your tips according with schematic the ground pin are 12 and 13 cheked with digital oscilloscope there isn't signal at pin 14 i think the si5351a don't work or it is damaged to use at moment the rtx i will found the original vfo on board to complete with L4 and C93. L4 wich toroid is? t37-6? how many turn i must made on it? thank you i will order a new si5351a to test the raduino board 73 Optional VCO.jpg
Michael Hagen All Messages By This Member #34153 开云体育 Yes, you are on the right track. I have built about16 RaduinoX PCB that a lot of folks here have purchased. I had problems on AT LEAST 1/2 like you are describing. It was always the Crystal or the SI531 part.? I use a Tiny little crystal that is tough to solder. So, I now have a procedure.? Solder all the I2C circuitry down with its connector. I have another RaduinoX? (Without SI5351 part) sending a test program at 10 MHz. I get the I2C signals on the Scope looking like they should at the SI5351 part on the board I am testing. Then I install the SI5351 part.? Sometimes it Kills the I2C.? I have seen I2C even on the Clock outputs. I have seen open pins to the Clock or Crystal. So, with flux and solder wick I go over the SI part's pins.? Inspect with a magnifier.? Clean with alcohol to. Then I use a big crystal with leads stuck through the crystal holes. ? You should see 25MHZ scope wave form on both crystal leads, one is larger than the other. Then check the Clock output. So, you need to inspect Crystal soldering, but mostly the SI Part.? Redo and clean with alcohol and test. Lucky you got the big size leaded crystal! I use REAL solder too!? Not the crap. 60/40%. 73's and good luck! Mike, WA6ISP On 11/1/2017 10:02 AM, sarnese via Groups.Io wrote: hi my raduino doesn't work again, checked it with frequenzy counter on the outout signal, the frequenzy go up and down isn't stable. infact the rtx don't work, to made a test i have used a rf generator into VFO input and the rtx start to give a good power out. i think there is a problem on my raduino board. the nano is able to program infact i download the last sketch for it. do you think is the chip 5351 the problem? thank you 73 Aurelio IZ8EGM -- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@...
Larry Smith All Messages By This Member #34161 More info from HFSIGS information site Inductor data The inductors used on the board as follows: L1, L2, L3?: 6uh, 40 turns on T30-6 core L4?: Only needed the analog VFO, 9uh, 50 turns on T30-6 core L5?: just a jumper on the standard bitx40, you will have to an inductor of a few uh to pull the BFO down for upper-sideband L6, L7?: 1.1 uh, 17 turns on T30-6 core L8?: 10 turns on FT37-43 T1,T2,T4,T5,T6,T7?: 10 turns trifilar on FT 37-43 core The L1,L2,L3,L4 need a wire gauge thin enough for the large number of turns. We use 36swg enamelled copper wire, you can use thinner wire if you have any. The rest of the transformers and inductors have use 28 swg. Note: The L4 is not required with the Raduino or any other digital VFO. The L5 is needed only if you want to operate USB (to pull the BFO to the lower slope of the crystal filter). toggle quoted message Show quoted text On Wed, Nov 1, 2017 at 2:40 PM, Larry Smith <815cpu@...> wrote: From the HFSIGS.com He shows 50 turns for L4 and you will need the trim cap C93. I was reminded with Farhan suggestion on the tuning pot.? I have had a 10turn 10K pot open on my receiver and it did the random drift and jumping frequency.? I reconnected the original kit 10k provided and it proved to be the 10k 10 turn pot I had was open.?? I noticed before the 10k 10turn failed that the mechanical feel was getting rough as time went on then it opened. Replaced it with better pot. Also the Si5351 gets its 3.3v from the Nano on board regulator.? Pin 2 on the Nano should show 3.3 volts.? Could be a bad Nano.? Cheaper to replce the nano in that case. You can go to:? ? ? HFSIGS will show most everything there you may need. 73 On Wed, Nov 1, 2017 at 1:25 PM, sarnese via Groups.Io <sarnese@...> wrote: hi Larry yes i have checked all your tips according with schematic the ground pin are 12 and 13 cheked with digital oscilloscope there isn't signal at pin 14 i think the si5351a don't work or it is damaged to use at moment the rtx i will found the original vfo on board to complete with L4 and C93. L4 wich toroid is? t37-6? how many turn i must made on it? thank you i will order a new si5351a to test the raduino board 73
radiooreilly All Messages By This Member #34180 My latest kit (third) Raduino was acting weird with the last two digits jumping around even with fixed resistors for the tuning pot. additionally, the display would jump into calibration mode all by itself. An O'Scope across the tuning pot 5 volt and ground side showed very large pulses riding on the D.C. I removed the Raduino to the bench as a stand alone element for trouble tracing. The solution was to tame the oscillating 5 volt regulator chip with 47 uf right at the input leads of the 7805 (left lead to center lead), and 1 uf across the output leads of the 7805 (right lead to center lead). Just putting a small cap at the tuning pot did nothing to calm the huge pulses on top of the 5 volts.
Vince Vielhaber #34181 You might want to put that O'scope on the power supply. Vince. toggle quoted message Show quoted text My latest kit (third) Raduino was acting weird with the last two digits jumping around even with fixed resistors for the tuning pot. additionally, the display would jump into calibration mode all by itself. An O'Scope across the tuning pot 5 volt and ground side showed very large pulses riding on the D.C. I removed the Raduino to the bench as a stand alone element for trouble tracing. The solution was to tame the oscillating 5 volt regulator chip with 47 uf right at the input leads of the 7805 (left lead to center lead), and 1 uf across the output leads of the 7805 (right lead to center lead). Just putting a small cap at the tuning pot did nothing to calm the huge pulses on top of the 5 volts. -- Michigan VHF Corp.
Larry Smith All Messages By This Member #34185 Typically the 5v regulator has a 1000uF. and then 100pf in parallel with the 1000uf. soldered to regulator.? About 56- 82 ohm 1/2 watt resistor in series with the supply voltage to the Raduino.? This is done to impede the "tuning clicks" as the pot is turned.? See good video for the cap placement 73 toggle quoted message Show quoted text On Thu, Nov 2, 2017 at 12:45 PM, <RCELDER@...> wrote: My latest kit (third) Raduino was acting weird with the last two digits jumping around even with fixed resistors for the tuning pot. additionally, the display would jump into calibration mode all by itself. An O'Scope across the tuning pot 5 volt and ground side showed very large pulses riding on the D.C. I removed the Raduino to the bench as a stand alone element for trouble tracing. The solution was to tame the oscillating 5 volt regulator chip with 47 uf right at the input leads of the 7805 (left lead to center lead), and 1 uf across the output leads of the 7805 (right lead to center lead). Just putting a small cap at the tuning pot did nothing to calm the huge pulses on top of the 5 volts.

Previous Topic Next Topic