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Re: Help with troubleshooting Bitx40 - no transmit. #bitx40help


 

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If your meter is set to 10A shouldn't you be plugging the leads in to COM and 10A?



On 10/24/2017 09:11 PM, Neris Biciunas wrote:

OK. ?So a few more facts for the puzzle.

-One of the extra capacitors is 100 pF in parallel with L7. ?As per Wayne NB6M as written up in BitX Hacks Blog.

-I tried to measure mA again, and something is really odd. First, I am running power from a battery box, 12.85v. ?
All connections are Powerpoles. ?I checked the power at the power distribution block (inside the radio, behind the fuse) 12.90v. ?My multimeter is a Mastech MS8264. ?Black lead is plugged into "COM", red lead into "mA". ?The dial is set to 10 A ?DC. ?The value that I see is -1.10 A, rising slowly to -0.45 A. ?Yes, I said negative values, ?No, I don't have my wires crossed. ?What the heck!

Jerry,
Thanks for all of the good leads. ?It will take me bit to figure out some of them. ?A few I can respond to now.

"If all you are doing is pressing the PTT button, you won't see any RF going out.
On a single sideband rig, you only get RF to the antenna wen there is audio into the microphone."
? ? ? Yep, I have tried "hallooooing" into the mic - not apparent effect.

"Put tape over the ends of all the extra leads coming out of that Raduino"
? ? ?My leads are pretty tidy. ?Not promising that I did't already short something, but I usually keep things pretty tidy.

"Make sure your antenna connector is wired up properly.
Don't laugh, it happens."
? ? ?Well, I have replaced the separate leads as supplied by HFSigs, with a short piece of tiny coax to a BNC. ?I am using the supplied connector. ?How do I confirm that POS and GRND are connected to the proper side of the connector (board)?

It will take me a bit to figure out the rest of your feedback. ?Thank you very much!?

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