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Re: ERROR MESSAGE
¿ªÔÆÌåÓýWOW! WHO Knew?
Where do I get the NEW library and how do I know what ino file it attaches to??
A bit(x) confusing to me
B
Sent from From: [email protected] <[email protected]> on behalf of Jack Purdum via Groups.Io <econjack@...>
Sent: Thursday, February 2, 2017 7:43 PM To: [email protected] Subject: Re: [BITX20] ERROR MESSAGE ?
The old Si351 library used only two arguments to the function. The latest library uses
three arguments. Download and install the new library and close/restart the IDE.
Jack, W8TEE
From: B S <saaint@...> To: [email protected] Sent: Thursday, February 2, 2017 8:37 PM Subject: [BITX20] ERROR MESSAGE While compiling RADINO.INO I get the following error message
exit status 1
no matching function for call to 'Si5351::set_freq(long
long int,
long long unsigned int, si5351_clock)'
What am I missing?
BOB
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Re: Possible PA low output problem.
And a minimalist RF probe, such as that N5ESE circuit. ?And a low pass RC filter to measure the quiescent DC voltage. ?I'm willing to assume they have a voltmeter, that costs a buck here in the USA if you show up at Harbor Freight on the right day. ?But the rest of this stuff should be on the main Bitx40 board. On Fri, Feb 3, 2017 at 04:24 pm, Jerry Gaffke wrote:
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Re: Adequate for 20w?
Rich:? Maybe.? Just try running it at 20 watts, checking the temp of the heat sink.?? If it gets too hot to touch, then you need more heat sink.? Or a little CPU fan aimed at the heat sink.? Good luck. 73? Bill On Friday, February 3, 2017 4:23 PM, Richard Andrew Knack via Groups.Io <ihc73scout2@...> wrote: And that STILL doesn't answer the original question. |
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Re: Possible PA low output problem.
First off, you are really close to having this thing work properly. ?And I suspect you are learning quite a lot. I assume you have an adequate antenna. ?Can they hear your 6 or 7W CW transmitter? Turning the bias control up all the way should be putting like 10 Amps through that IRF510, enough to blow it across the room. ?Especially if you are feeding the IRF510 from 20V. ?Are you sure your IRF510 power supply is capable of giving at least a couple Amps? ?Monitor the power supply voltage with a voltmeter when transmitting. ? Yes, I think that when your 10A max digital meter says 0.1 that means it sees 100ma. ? I have no idea why your meter would show 2.4 when watching DC current into the final with the meter set for a maximum range of 200ma, that might be a question for whoever sold you the meter. ?Better yet, take the whole thing to the next club meeting or over to your Elmer, see if they can figure this out. If you don't trust your wattmeter, here's a sanity check. ?Get a 50 ohm carbon resistor rated for 1 or 2 watts. ?Put it across the transmitter output for a dummy load. ?Put something like a tone generator or even some loud music in front of the microphone. ?Hold down the PTT (while monitoring IRF510 current, and making sure the IRF510 doesn't get hotter than you want to touch) and see how hot that 50 ohm resistor is getting. ? Let it cool down, then put the same 50 ohm resistor across a 12 volt battery or power supply, compare how long it takes to get as hot as it did with your transmitter. ?With 12v across 50 ohms, that's 12/50 = 0.24 Amps. ?Amps times Volts is power, so the 12 volt supply is heating the resistor with 0.24*12 = 2.88 Watts. ?When your transmitter is working correctly with 12v into the IRF510, it should heat that resistor about twice as fast as the 12v power supply did. I ordered a Bitx40 on Dec 23, it hasn't shown up yet, apparently the USPS has eaten it. ?So I can't measure a real rig. ?But I did simulate what the voltages should be with LTSpice as documented in the following post: ?/g/BITX20/topic/ltspice_simulation_of/4260835? ? ? That might be of some help to figuring out how well the IRF510 is doing, especially if you can find somebody with a scope who knows how to use it. ? LTSpice is very easy to use, and makes it easy to see exactly what is going on in these circuits using nothing more than a computer. Don't feed the IRF510 20v until you are sure it is working correctly at 12v. ?Easy enough to blow it at 12v. ?Possible that it is somewhat damaged now, and that's the problem? ?Though usually they fail catastrophically, and if you can still adjust the bias control for 100ma, it's likely working well enough. ?When you do get around to blowing the IRF510, you will find that they are very cheap online. ?I'd recommend getting either the InternationalRectifier or Vishay brand. And to the rest of the group here, we clearly need a standard way of driving the final amp with a known signal source. ?Perhaps one of the Si5351 outputs gets used as a signal generator, goes through a resistive attenuator, the output of which gets shorted into the final amp side of the LPF. ?And/Or perhaps a Raduino digital output drives a resistive attenuator with a 1khz square wave from a counter-timer, gets applied to the microphone input. ?The only additional parts required are a few one cent resistors. Jerry, KE7ER On Fri, Feb 3, 2017 at 02:38 pm, John Smith wrote:
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Re: Using a DC booster ...
Hi Noel! You can sure try. Depending on the DC/DC converter you have it might work. In my case the model I had on hand (for which I've posted the link in my previous post) generates a lot of switching noise on the 12V power line. That increases the receiver noise which is quite high from the start. For the PA the current requirements are only 1.5A to 2 A. If it is for desk use I would use a second linear power supply for PA. If you have a 120V to 24V transformer that can deliver 2A I would make a power supply just for that. A good option is this: or this: Second option has higher output current capability but you cannot adjust the current limit and the voltage is set using a multi turn trim pot. You need to find a good heat sink for the power transistor. VA3NOI |
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Possible PA low output problem.
I haven't been able to make a contact yet, and I think my PA isn't putting out enough power. Awhile back on the subject of bad audio, Farhan suggested I ask someone for a signal report. No one I asked at the club could hear my Bitx 40. I am going to cut and paste an Email I sent to my elmer. Perhaps some of you already know about this one. Jim and I tested the Bitx 40, and I could hear him better connecting the antenna directly, but he could not hear me even with 20 volts into the final. I went back through the alignment instructions, and I am not sure I am reading the multimeter right.? This is what I am doing. I moved the red probe wire to the 10ADC socket. Set dial to 10A. cut positive 12V PA input. Inserted meter in series with meter pos to power IN pos. Meter neg to PA side pos input. Now I press PTT, turn BIAS pot counter clockwise until I see 00.10, looking for 100mA as instructed. Is this showing 100mA? It further instructs me to say hello loudly to see an amp or more. But it only goes up to 00.50. And goes up to 00.90 when BIAS is turned all the way up. I also put the meter on DCA/200m setting, showing 00.0, adjust to 01.1, and it goes up to 02.4 with a loud hello. I would expect to see an over load message at this setting if the current approached an AMP. I can hear my self on my nearby SW receiver. I am not sure I am doing or reading it right because of the unexpected results, and inexperience. My watt meter when set for 5 watt range shows about 2 watts. When I tested my CW radio it showed 6 or 7 on the 5 watt range. So I think it's working right. |
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Re: Creating a Metal Enclosure using LibreCAD.org drawing, 6 x 6 x 3
K-Squared
That's a nifty design, Ryan!? I would suggest you put power and other input/output connections (antenna, external speaker/headphones, etc.) on the rear, rather than on either side. It will make for better cable management whether the radio is on a desk or on your lap. Karl - W8TIF |
Ion Petroianu, VA3NOI