RF stages of oscillators will show weird voltages unless the oscillator is stopped.
Short X5 and take readings, I am guessing they will be fine.
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At 05/04/2017, you wrote: Ok, I might have found it. q16 is showing very low voltage on the Collector. The other transistors show -5 to -6 volts on the collector, Q16 shows -.718. So that might be something. BUT, Q10 shows a reverse voltage on the emitter compared to the other transistors. Other transistors are showing about .65 - .67 volts, Q10 is showing -.95 volts. HMMM, maybe I'll change both of them.
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All my voltages on the transistors seem to be in line with what Randy was seeing +/- a little bit due to different voltage from the power supply, but close enough to determine that they are probably ok. ?Now to the next thing. ?Can someone check voltages on U1. ?It is the 6 pin LM385/6 amplifier. ?I am a little suspicious of the voltages I am seeing from it.
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Re: R136 RF Drive Control - how to set?
Randy, I Just got a message from a member that R136 is supposed to be set so that you get the 1 amp drive with the long hello into the mic. I assumed it was preset and never touched it. He said something about the missing info in step 5 of the PA setup. Your thoughts?
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For the shipping database.
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Ordered on 3/18/2017
Shipped on 3/22/2017
Received on 4/4/2017
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Board is marked n3_722 checkmark
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Firing up the soldering iron right now.
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Can¡¯t wait to test it and play around with the Raduino firmware.
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73¡¯²õ,
John.
KG7UMN
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Tim This doc was created by Randy Hall. You should join if you aren't a member
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On Apr 4, 2017, at 10:17 PM, Tim - K7PTM < tamccain@...> wrote: Ok, I might have found it. ?q16 is showing very low voltage on the Collector. ?The other transistors show -5 to -6 volts on the collector, Q16 shows -.718. ?So that might be something. ?BUT, Q10 shows a reverse voltage on the emitter compared to the other transistors. ?Other transistors are showing about .65 - .67 volts, Q10 is showing -.95 volts. ?HMMM, maybe I'll change both of them. ?
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Ok, I might have found it. ?q16 is showing very low voltage on the Collector. ?The other transistors show -5 to -6 volts on the collector, Q16 shows -.718. ?So that might be something. ?BUT, Q10 shows a reverse voltage on the emitter compared to the other transistors. ?Other transistors are showing about .65 - .67 volts, Q10 is showing -.95 volts. ?HMMM, maybe I'll change both of them. ?
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Re: raduino v1.05 released: kill the 7199 birdie
Only Q7 works as an amplifier. Q8 and Q9 are emitter followers, so no gain there. -- Ion VA3NOI
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Hello,
This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected]
group.
File: Raduino_V_1_5.pdf
Uploaded By:
atouk
Description:
V. 1.5 INO converted to PDF as a reference document with a few corrections, and typo fixes.
You can access this file at the URL:
/g/BITX20/files/Raduino_V_1_5.pdf
Cheers,
The Groups.io Team
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College Professor Simon Thompson
I know this! You can reprogram one of the ports to accept an i/o signal. The black wire is the likely target. In my case, I blew up the i/o port connected to the red wire. You only need to alter one line of code to get the raduino back to doing what it does best.
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On Apr 4, 2017, at 5:59 PM, Tim - K7PTM < tamccain@...> wrote:
ok, something weird just popped up. ?The raduino is now stuck in calibration mode. ?The red wire is not grounded. ?I have completely removed the wire from the harness and it is stuck in calibration mode. ?UGH, I am frustrated!
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ok, something weird just popped up. ?The raduino is now stuck in calibration mode. ?The red wire is not grounded. ?I have completely removed the wire from the harness and it is stuck in calibration mode. ?UGH, I am frustrated!
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Your best bet is to measure the voltages, since you are unable to remove every transistor, easily. The one with the weird voltages should be your culprit.
Marco - KG5PRT?
On Apr 4, 2017 7:38 PM, "Tim - K7PTM" < tamccain@...> wrote: That's what it seems like, but I am measuring q16, not a capacitor.? I guess it is possible that it is reading capacitance in the line somehow, not sure.
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That's what it seems like, but I am measuring q16, not a capacitor. ?I guess it is possible that it is reading capacitance in the line somehow, not sure.
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Sounds like you are measuring a capacitor that is slowly charging from the current placed across it by the ohmmeter.
On Tue, Apr 4, 2017 at 05:21 pm, Tim - K7PTM wrote: OK, so I started testing the transistors in the radio and I got one I think might be bad. ?I want to ask your opinion. I am testing the resistance between the base and the collector / the base and the emitter. ?When I test between the base and the collector I get about 100k ohm. ?This is in accord with what the other transistors are showing. ?When I test between the base and emitter, there is resistance, but it is a constantly rising resistance. ?It doesn't settle like it does with the others. ?Does this sound like the transistor is bad?
?
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OK, so I started testing the transistors in the radio and I got one I think might be bad. ?I want to ask your opinion. I am testing the resistance between the base and the collector / the base and the emitter. ?When I test between the base and the collector I get about 100k ohm. ?This is in accord with what the other transistors are showing. ?When I test between the base and emitter, there is resistance, but it is a constantly rising resistance. ?It doesn't settle like it does with the others. ?Does this sound like the transistor is bad?
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Re: raduino v1.05 released: kill the 7199 birdie
Dave,
yes it puzzles me too...
Fact is that it does make a tremendous difference with my BITX40 (the
birdie went down from S9++++ to virtually zero). Some other builders don't
notice so much difference.
Some time ago we had a discussion on this forum about the 7199 birdie. See
Hans Summer's posting #22023 with his ideas of what's causing it.
73, Allard PE1NWL
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Thanks for the info offer .I am a babe in the woods with the Arduino and put the post up to see if it is feasible before I try to learn how to do it with an SD Card. As it seems it may be OK to use the eeprom I will explore that first. I am hoping to find a way to store frequencies that can be recalled, maybe with a channel change switch? At this stage of my learning I am just having fun listening around and doing some simple sketch mods.
Howard, VK4BS
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I've been toying with the idea of removing the arduino and using a Raspberry Pi 3 to facilitate everything from mode/frequency changes to CAT control and internal digital programs like FLDIGI WSJTX etc. ?Seems a simple enough project. I use 32GB SD cards in my Pi's no shortage of space :)
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Re: Tuning Clicks Additional Info
Can you share the code for making the function button work please.
On Tue, Apr 4, 2017 at 7:28 PM, howardmsmall <howard@...> wrote: Hopefully this may help the gurus... I have had my Raduino for less than a week and it?has the usual tuning clicks. A few days ago I suddenly realised they had gone but they were back very soon after. Last night it was clicking away as usual but this morning the clicks were gone! I am using v1.04 with some mods to allow the function button to switch between VFOs, make them the same and turn on the bfo (the latter in name only). After I held the function button down to make the VFOs the same the clicks returned! Powering the Raduino off/on made no difference. I have now loaded v1.05 and the clicks are still there. Perhaps there is a clue in this? Howard, VK4BS
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Tuning Clicks Additional Info
Hopefully this may help the gurus... I have had my Raduino for less than a week and it?has the usual tuning clicks. A few days ago I suddenly realised they had gone but they were back very soon after. Last night it was clicking away as usual but this morning the clicks were gone! I am using v1.04 with some mods to allow the function button to switch between VFOs, make them the same and turn on the bfo (the latter in name only). After I held the function button down to make the VFOs the same the clicks returned! Powering the Raduino off/on made no difference. I have now loaded v1.05 and the clicks are still there. Perhaps there is a clue in this? Howard, VK4BS
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The EEPROM in an Arduino is good for an average of 10,000 write cycles and virtually unlimited reads. ?If you only wrote to the EEPROM when you actually updated an entry, the board would probably outlast any one of us!
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Raj vu2zap
Ion Petroianu, VA3NOI
Allard PE1NWL