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extra surface mount component
Hi All I cannot find in the topic a reference to the extra surface mount component included in the Bitx40 kit. I know it is in there, but I can't find, and I don't know what the component is for.
By College Professor Simon Thompson <nwccenglishprofessor@...> · #24033 ·
BITX40 Audio Indications for Modes And Frequency Readout
Hi all. Sorry for what might be Arduino newbe questions, but your patience is appreciated. I'd like to add some things which would be helpful for people who can't see the display. I would like to
By N7GES <kvutter@...> · #24032 ·
Re: am broadcast break throgh
Hi thank you for the pointers.? I will take another look at the pcd just to make sure there isn't a problem tomorrow.? I have ordered a new si5351 board and a arduino nano so will be putting it back
By Mark · #24031 ·
Re: Continuity
Thank you very much for the methodical approach to testing for power. I am happy to say that all connections have been made, as you suggested, and the radio is transmitting and receiving very nicely,
By College Professor Simon Thompson <nwccenglishprofessor@...> · #24030 ·
Re: PTT line to Raduino?
That last bit was bout that single side band. So to clarify which case is that character? Upper or lower? I am gonna take a break now so I don't stir up any nerd rage.
By John Smith · #24029 ·
Re: Bitx40 low volume oscillation squeal
nothing ventured, nothing gained - I will see if I have one lying around and will give it a try. I still don't understand what causes this behaviour. I will have to breadboard the circuit and play
By Graham <planophore@...> · #24028 ·
Re: PTT line to Raduino?
Damn, I did it again. Look at this-?It looks just like what's in the Arduino IDE except the top is not slanted down. Indicating a lower case L. You guys are right. I am glad I didn't make a bigger
By John Smith · #24027 ·
Re: Tuning POT not tuning
Ok, we can close this topic now. I went to Fry's, bought a 10k linear pot. Replaced my broken one, and it works like a charm now. Thank everyone.
By Daniel Acevedo · #24026 ·
Re: Bitx40 low volume oscillation squeal
That is strange. This was the problem with mine and 2 others had the same problem. I am assuming your smd version is built the same as the through hole version. 73 Ken
By Ken · #24025 ·
Re: Bitx40 low volume oscillation squeal
Try a 4 ohm speaker - solved the problem for me! De VK2AHF Syd
By Ozemail · #24024 ·
Re: Bitx40 low volume oscillation squeal
I tried a second one and had the same behavior. I will dig through my junk box and see if I can find another to try. I am not sure how a pot that has dead zones on one or both ends would cause this
By Graham <planophore@...> · #24023 ·
Re: odd behaviour with new library si5351 v2.02 => strong tuning clicks!
Allard, Confirmed. Both updates (0.2, 0.3) have 1.7ms gaps when reprogramming frequency. Best to revert to 2.0.1. N5KYD alerted me. -Don, ND6T
By Don, ND6T · #24022 ·
Re: PTT line to Raduino?
It is the letter L not the number one. You can determine this by using the” find” function under “edit”. If you search for 8001 (with a one) you will not find it in the referenced line but
By K5ESS · #24021 ·
Bitx40 First contact
Thought, why not..... 9A2L 59, well its a contest so what did I expect but just over 1400kms with under 5 watts. Bitx40 is still a PCB with wires hanging off it, no case as yet. Hopefully later this
By philip yates <phil@...> · #24020 ·
Re: Continuity
I measured 3.1 kOhm at main PWR. So same like with your rig. Measuring ?PA-PWR ?between + and GND ?is around 60 MOhm (starting with lower value as Jerry explained) and switching test leads on this
By DJ2AG · #24019 ·
Re: Bitx40 low volume oscillation squeal
Try a new one. I found that mine had dead zones at both ends of travel. Replace with a log or audio taper. 73 Ken VA3ABN
By Ken · #24018 ·
Re: Bitx40 low volume oscillation squeal
Yes.
By Graham <planophore@...> · #24017 ·
Re: Bitx40 low volume oscillation squeal
Graham Are you using the original volume control that came with the Bitx40? 73 Ken VA3ABN
By Ken · #24016 ·
Re: am broadcast break throgh
Are these shortwave stations, can you hear them on 41 meters with some other shortwave receiver? ?If so, read this thread: ?/g/BITX20/message/21996 (
By Jerry Gaffke · #24015 ·
Bitx40 low volume oscillation squeal
Good day all, I have been messing about with my Bitx40 SMD on an off for a couple of weeks working towards getting it mounted in a case. I have removed C113 across the LM386 pins 1 and 8 to reduce
By Graham <planophore@...> · #24014 ·