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Okay last time questions and then i quit
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Rene
Okay, many problems with the V6, from starttill now(still no licence but working on), when i use the radio for listening it is nice but when i turn the tuning knob, often the frequence goes backwards??? specialy when i turn fast....however the prblem is there.
Second, when i try to tx, then on every transmit frequence there is a peeeeeeeeeeeeeep, louder the the mike audio. I removed cause of that the speaker, but still peeeeeep, so i changed the electret, and still peeeeeeep. So i tryed to change the radio to cw, and pushed the mike, then there is only a lot of peeeeps but constantly every half second. I did not change the software, i did not change the mainboard or the arduno, just the mike. even when i shortcut the ptt, the peeeeeeeep is still there. So i tryed to get everything out of the metal box and tryed it just open.....still peeeeep. So what to do now???, take a hammer??? I notice that the raduno with the screen, has a bad possision at the metalbox. When i put the screws in, i have to pull up the screen for about 5 mm. So bad contruction or bad luck?? As last, sorry for my bad Englisch.. regards, Rene, Hoofddorp, Netherlands |
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Do you have the radio connected to a dummy load when you are trying the TX function?? By your description, it seems to be getting RF back into the audio circuits.? That could be caused by a mismatch on the antenna.? I would suggest that you try a dummy load to see if it happens then.
The beep every 0.5 seconds is probably caused by your keyer setup.? There is a menu selection to choose either a straight key or an iambic keyer. At this point, I would recommend that you focus on getting rid of the "peeeeeeeeeeeeeep" in SSB mode. For What it is Worth (FWIW), 73 Evan AC9TU |
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Rene
There is a fine transceiver in that box, so do not quit please. Try tuning slowly, is it better?? if encoder is very very bad, request replacement.? if not so bad, it may be like mine, just he gentle. Describe your antenna or dummy load? Also what kind of power supply? A bad antenna can cause RF leakage back into the transceiver. Please get your license, in good conditions ubitx can reach to USA from Netherlands. 73 curt wb8yyy |
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Mark - N7EKU
Hi,
Rene said from before that he is using a dummy load, so that is not the problem. I suppose there could be a problem with the raduino/display connection.? That could be sorted by doing a conductivity test using your multimeter for each pin to socket connection on the raduino connection.? Can you do that Rene? Another suspected problem with the peeping could be that your HT receiver is too close. It kind of depends on how well shielded the transceiver and dummy load are.? But maybe you can try to have someone listen from another room in your house while you transmit? I don't remember the status though, of your power out.? You have a known good power meter connected between your transceiver and dummy load?? Do you get power out using CW and a telegraph key plugged into the key jack (or shorted by hand)?? Still no power out when whistling in SSB mode? You should eliminate the coax cables too.?? Unplug the coax connector from your transceiver and measure across the connector.? If you have a dummy load at the other end, you should have a reading of 50 ohms or so.? Sometimes even brand new cables can be bad, so it is good to check them and eliminate them as a suspect. If after all this, your radio still tests bad, I think something needs to be done via the vendor to help you out.? But do all these tests to make sure first. Last thing, spinning the dial fast can cause problems for inexpensive encoders.? They should work fine at lower speeds, but can't handle fast rotations.? They kind of have a "speed limit" like a Yugo? :-p 73, Mark |
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Rene
On Wed, Mar 25, 2020 at 04:40 AM, Mark - N7EKU wrote:
Hi, ?Okay Mark thx for fast answereing, tommorroe i am gonna try al those things.. but for now, yes i use an dummy load, and furter no cables in the near. The receiver is an yupiteru mvt 7100 with dummy antenna on it(tryed also normal antenna) and i did put the ATT on so more weak receiving. Mayby i have to try on a diffrent place furter in the house. I have an 3 meters swr meter, swr,modulation and power. Swr stays on 0?, modulation half but power on 20 meter more then 10, on 40 meter maybe 1 or 1.5 watts. But i shall try to measure with the multimeter. Not today, beautiful weather so going fushin onsea. Again thanks for the tips. Brings down my frustration ? |
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Rene
Ok¨¦ Evan also thanks for you, i don't use the bitx for cw but it was just to try things out. I am.planning to use it for digital modes. If it al should work, i even want to put on an nextion screen on it but i don't want to put money in a box that doesn't work properley. So work is low now,not so many trains to drive so more time to solve things out. Again thanks you all for fast answering |
¿ªÔÆÌåÓýMaybe there is someone in your area with some experience, who could help you?? It's tough trying to figure things out for yourself, especially if it's something new to you.? (I don't know if you've ever mentioned the area in which you live, or if you'd be comfortable doing so, but in some areas there are hams ready and willing to help someone out!)Bob N4FBZ On 3/25/20 3:32 AM, Rene wrote:
Ok¨¦ Evan also thanks for you, i don't use the bitx for cw but it was just to try things out. I am.planning to use it for digital modes. If it al should work, i even want to put on an nextion screen on it but i don't want to put money in a box that doesn't work properley. So work is low now,not so many trains to drive so more time to solve things out. Again thanks you all for fast answering |
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Jonathan Magee
Hi Rene You mention you get a "peeeeep" when you transmit. Is this coming from the receiver you are checking your signal?on? If so are you using headphones with the receiver? It could be that the microphone?is picking up the receiver's audio and you are getting a feedback loop. 73 de Jonathan GI7KMC On Wed, 25 Mar 2020 at 07:25, Rene <rmvanb@...> wrote: On Wed, Mar 25, 2020 at 04:40 AM, Mark - N7EKU wrote: |
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Hi Rene
I have not see this suggestion given to you before so here goes.? Have you checked the power supply you are using, you need at least 3 to 4 amps for transmit, it is your power supply is going into current limiting and partly shutting down giving the noise. If your power supply is OK remember that you could remove the power from the final PA FET's to protect them while you test, you should still be able to hear the signal from the transmit driver on you monitor receiver. Hope that helps David |
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Mark - N7EKU
Hi Rene,
I think David may be correct.? Before you have said: Feb 19 ? #76181??
I use 3x 18650 in serie with a 78h12....so 12volts and max 5A. Now? glued 2 battery paks together and have 6x 18650. I get the18650 from old bike battery's. At the moment i have 60 of them, so power enough??
At a high discharge current, Li-Ion batteries show about 3.7V each (and that's only on a near top charge battery).? So 3 x 3.7V is only 11.1 volts.? Then you have a 78h12 on it which even more messes with the voltage supply because the battery voltage drops below the level needed for it to function.? Note: Your rig may run OK wit the same battery pack if you just take out the regulator.? But even a 4 series pack may not always provide enough voltage overhead for the 12V regulator you have: 3.7V * 4 =? 14.8V 14.8V - 2.3V(typical dropout for your regulator)? =? 12.5V Once the pack starts to discharge you will drop below this and run into trouble again.? Of course a 5 series pack should be just fine (with some good heatsink on the regulator). 73, Mark |
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Rene
Hello again, did some measurings with mulimeter.
The radio pulls when receiving on 14.250 mhz, about 280 to 300 mA, when TX its jumping from 850 to 1100 mA by 13.8 volts, the strange thing is when i push the ptt and make no noice the radio pulls still 800 mAso without modulation. Think also that is not correct??? So on the dummy, the midland Hi Qline says me about 10 watts output. But still that toon on my transmit frequentie and bad modulation. I tryed to make a record of the peeeeeeeeeeep. So i am doing some experiments with mike's but the audio is realy bad from the baofeng regards, Rene |
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Mark - N7EKU
On Fri, Mar 27, 2020 at 06:46 AM, Rene wrote:
Hello again,Hi too, That is good you are on a capable power supply so we don't need to worry about that. did some measurings with mulimeter.On the 20m band, mine requires around 1.7A on CW (I still need to measure SSB) for 5.4W out.? Your current readings actually seem low for making 10W out. the strange thing is when i push the ptt and make no noise the radio pulls still 800 mAso without modulation. Think also that is not correct???I think this is correct as when PTT is pushed the bias currents will start on the two final transistors -- maybe 250mA each is about where they set them. So on the dummy, the midland Hi Qline says me about 10 watts output.That sounds good also -- mine only does 5.4W on 20m CW.? When just pushing PTT only (no microphone input) does the power meter read 10 watts also? But still that toon on my transmit frequentie and bad modulation.That sounds bad.? To my ears, the peeeeep is not microphone feed back as it is too constant in sound.? The voice quality is very bad as you say. So i am doing some experiments with mike's but the audio is realy bad from the baofengI would confirm that the leads are correct on the microphone.? Check continuity and resistance of the shield connection of the 3.5mm plug to the negative terminal of the electret microphone element.? And check the same for the tip connection on the jack to the positive terminal of the microphone element. regards, Regards too.? I don't know what else to check! Mark |
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Rene,
Based on the recording, I would try adjusting the BFO.? It sounds like you are getting the carrier through when you press the PTT button.? See if you get the same sound with CW mode.? CW does not use the BFO, however it does send a constant carrier.? The tone might be different in frequency. Here are the instruction for calibration and BFO adjustment: ? 73 Evan AC9TU |
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Rene
Some thoughts that may help. 1? As Mark says, 800mA without modulation sounds about right, you will be able to detect some residual carrier (carrier leakage) on a nearby receiver.? This will give you the peep you are talking about.? As Evan says check the CW/USB setting.? Measure the current and output power in both CW and USB modes, post the results here. 2? I would not start with checking the transmitter, you really need the receiver to be working correctly first, it's especially important the BFO frequency is correctly set, this has to be done using the receiver, the links Evan sent you are the ones you need. 3? My guess at your fault, and it is only a guess, is the that the BFO is off slightly and there is something wrong with your transmit audio, maybe the? microphone ot connections BUT with you having limited test gear it's difficult to tell.? You must get the receive correctly first. On your power input, do you have a fuse on the incoming supply??? Hope this helps David S |
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Rene
And the story??, okay thx for fast reply, the receiver i used, the yupiteru, is on ssb, i tryed both, usb and lsb.
The peeeep is also when i just put on a stereoplug in the mike hole and connect (shortcut) the ptt. I shall try what the readings are on cw. I have a few times recaibrated the radio, yesterday on china radio 15.350khz. Then bfo, then freq again and then again bfo. The receiver of the radio is good, i isten often to FT8 and phone. The wire antenna, 10 meter with a coil, gives me a lot of amateurs all over the world, even Korea, New Sealand , Us etcetc.? I know a guy on my job, he got also his licence and i am gonna ask him for help. Problem is corona,no contact with other people but your family in your house... So after work today, i gonna try to make time free again to play with the radio.. Thanks for answering you all. Regards, Rene Netherlands |
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