HELP on Gerber Files of M0YTH
|
Hello,
As we read on this forum, many people had problems with the Gerber files of the M0YTH montage.?I¡¯ve also spent a lot of time on this. It seems that there is a problem of scale because I only get a small circuit of 1.5 cm instead of about 15cms In addition, there may be a choice to make between MM and Inches. I tried to use the GerberView software, but now it is out of trial date. In addition, the files are in the RS-274D format, RS-274X files are required. So, if a Gerbe specialist could look at this,?and?if he could provide correct RS-274X files to use on KICAD. Thank you here originals files |
|
I imported the gerbers into Camtastic.. this the Gerber viewer we use at work and it shows a 6 inch by 6 inch board.. so if the original was 6 x 6 then my board manufacturer would have no problems with these Gerbers.. The only thing I would need to verify is whether layer1 is top or bottom.. it appears that layer1 is the bottom of the board..? Thanks Will On Sat, Sep 18, 2021 at 1:13 AM Gerard <kabupos@...> wrote: Hello, |
|
Hello, The dimensions are good. For me it is about 150mm side (6*2.54). The components are mounted on the layer where there is the most copper. For me the layer 1. However, I can¡¯t seem to do what I wanted to do, which was to replace the components with SMD's. After redoing the diagram in Kicad and importing the components on this pcb, you cannot change the skillscreen layer (seen as a graphic layer). We should recreate the pcb from A to Z. So I am also looking forward to the kicad documents of the ubitx v6. cdt |
|
I agree.. Didn't realise you wanted to convert to SMDs.. Recreate the PCB.. and the best place to start is with a schematic.. which would give a reliable and correct NETLIST..? On Mon, Sep 20, 2021 at 11:21 AM Gerard <kabupos@...> wrote:
|
|
Hello,
I¡¯m trailing designing a new PCB from M0HYT¡¯s Ubitx. The copper side where the components were (No SMD, only components with through holes) had few tracks but a maximumground. The rear face where the components were welded, there were only tracks? and no ground plan. If I keep the same type of component layout, then it will be more advantageous to put the SMD components on the back side of the PCB (Where there are the most tracks) and the hole components on the classic side. My question: Keep the ground? on the side of the components with holes??Move it on the side of the SMD components???Put one on each side and connect it with holes???Which placement for the ground holes (EX: 1 every cm?) Question for a specialist RF ground? ?design. LOL Some id¨¦as? cdt |
|
Hello,
When I look at the schema of Ubitx and that of M0YTH, I do find some differences, but the most important one concerns the power supply of MOS.?On the Ubitx it is directly powered by 12V, on the diagram of M0YTH it is powered by the TX. Since I¡¯m working on the PCB, I think it¡¯s wiser to connect to the 12V. What do you think? Ubitx sch¨¦matic M0YTH sch¨¦matic cdt |
|
Gerard If you don't want to switch the PA mosfets supply I suggest that at least you arrange to switch the bias supply to them as otherwise they will be dissipating power and draining your battery if operating portable Si vous ne voulez pas changer l'alimentation des mosfets PA, je vous sugg¨¨re au moins de vous arranger pour leur basculer l'alimentation de polarisation, sinon ils dissiperont de l'¨¦nergie et ¨¦puiseront votre batterie si vous utilisez un portable. On Thu, Sep 30, 2021 at 11:17 AM Gerard <kabupos@...> wrote:
|
|
Hello,
I would like to have a picture of the underside of a Ubitx V6 to study the ground plane. I always have a little trouble defining how to do this one well to avoid all the noise problems. As my PCB circuit to SMD components on each side, my idea was to put a ground plan on both sides and connect them with a multitude of via. Then I wonder if it is not better to make a ground plan on the digital part (nano + SI5351) and another for the analog part (part power amplifier, audio, and RF amp (Or do one for each section? ) then connect them to each other at the Ground point of the power supply. (Star connexion) your opinions. cdt |
|
Hello,
I have also an another question: On the M0YTH diagram, the filters part is not detailed and the operation of the relays is a little different see picture here: You can see filter 10M, 17M,30M,50M, but NO SCHEMATIC of the filters. So filters on the Ubtix are they the samme? example: Coils of 400nH is for filter 60M? so is it good? so is that good? 400NH> Filter 60M 750NH> Filter 30M 400NH> Filter 17M 330NH> Filter 10M Please confirm if my interpretation is correct or other. The software i used? will be KD8CEC, so?the operation of the relay will be therefore piloted with cdt |
|
The highest value of inductance and capacitors should be the lowest band, the next highest the next higher band etc On Mon, Oct 4, 2021 at 6:31 PM Gerard <kabupos@...> wrote:
|
|
Hello Gerard,
Here is the code segment for the standard TX filter selection using the KD8CEC version 1.2 software: #if UBITX_BOARD_VERSION == 5
? ? if (freq > 21000000L){? // the default filter is with 35 MHz cut-off
? ? ? digitalWrite(TX_LPF_A, 0);
? ? ? digitalWrite(TX_LPF_B, 0);
? ? ? digitalWrite(TX_LPF_C, 0);
? ? }
? ? else if (freq >= 14000000L){ //thrown the KT1 relay on, the 30 MHz LPF is bypassed and the 14-18 MHz LPF is allowd to go through
? ? ? digitalWrite(TX_LPF_A, 1);
? ? ? digitalWrite(TX_LPF_B, 0);
? ? ? digitalWrite(TX_LPF_C, 0);
? ? }
? ? else if (freq > 7000000L){
? ? ? digitalWrite(TX_LPF_A, 0);
? ? ? digitalWrite(TX_LPF_B, 1);
? ? ? digitalWrite(TX_LPF_C, 0);? ??
? ? }
? ? else {
? ? ? digitalWrite(TX_LPF_A, 0);
? ? ? digitalWrite(TX_LPF_B, 0);
? ? ? digitalWrite(TX_LPF_C, 1);? ??
? ? }
? #else
? ? if (freq > 21000000L){? // the default filter is with 35 MHz cut-off
? ? ? digitalWrite(TX_LPF_A, 0);
? ? ? digitalWrite(TX_LPF_B, 0);
? ? ? digitalWrite(TX_LPF_C, 0);
? ? }
? ? else if (freq >= 14000000L){ //thrown the KT1 relay on, the 30 MHz LPF is bypassed and the 14-18 MHz LPF is allowd to go through
? ? ? digitalWrite(TX_LPF_A, 1);
? ? ? digitalWrite(TX_LPF_B, 0);
? ? ? digitalWrite(TX_LPF_C, 0);
? ? }
? ? else if (freq > 7000000L){
? ? ? digitalWrite(TX_LPF_A, 1);
? ? ? digitalWrite(TX_LPF_B, 1);
? ? ? digitalWrite(TX_LPF_C, 0);? ??
? ? }
? ? else {
? ? ? digitalWrite(TX_LPF_A, 1);
? ? ? digitalWrite(TX_LPF_B, 1);
? ? ? digitalWrite(TX_LPF_C, 1);? ??
? ? }
? #endif
Based on the M0THY filter section, the filter segments are not in agreement.? For the M0THY board, all of the relays must be on to engage the 10meter filter.? On the HFSignals v3 or v4 boards, all relays are on for 80/60meters.? So the choices are to change the filter to relay assignment or to use the custom filter settings in the KD8CEC software.? ?This can be done with the Memory Manager software on this screen: My preference would be to either change the board to match the standard relay alignment or to modify the KD8CEC software to match the M0THY board.? This is based on the warning in the software and the worry that one time after making a change I would forget to set up the custom filter section properly.? You could use the Memory Manager for testing and alignment, then make the changes to the software and compile when you have it the way you want it. 73 Evan AC9TU |
|
Gerard,
toggle quoted message
Show quoted text
K1 pins are mislabelled. It should be same as K2 etc. Raj At 06/10/2021, you wrote: Hello,When I look at the schematics of the Ubitx, I see that for K1, cabling is different from other relays. Yet when I look at some PCB's pictures, all 5 relays are identical. |
Gerard
Will Coetzee
Raj vu2zap