开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
Date
Re: 'Small as possible BITX40'
That looks sweet! You did a great job! Roy, WA0YMH
By Roy Appleton · #25318 ·
Re: 'Small as possible BITX40'
Regulator on the Raduino can be mounted on the other side of the board, fits perfectly: ?Clip the 3 leads close to the board. ?Unsolder the stubs remaining in the board one by one and pull them out
By Jerry Gaffke · #25317 ·
Re: 'Small as possible BITX40'
quote === I'm making a set of antennas for it, including a DF loop. unquote ==== Is it a DF loop for 40 m or 80 m (most likely) Any design reference ? TIA Frank , GM0CSZ / KN6WH wrote:
By Frank Dinger , EI7KS · #25316 ·
Re: 'Small as possible BITX40'
Looks great! This is my first build of any kind.? Does someone have instructions on how to get that regulator moved out of the way so I can fit this thing in a small case like this?? Tx.
By Tradesforbeer · #25315 ·
Re: PTT pop hack
Very annoying pop in the audio. It is even worse with the Motorola mic I am using. If I turn the audio volume control to minimum then the pop almost disappears. That tells me that source is the
By Raj vu2zap · #25314 ·
Re: Subject: Connectors - board to device
"JST XH 2.5mm ..." Yes, I did that. Thanks for the info. Just simply knowing what they are called really helps when doing a search. thanks Joe W3TTT n0bhc@...> wrote:
By Baruch Atta <baruchatta@...> · #25313 ·
Re: PTT pop hack
Simple brute force solution use a small relay to disconnect the speaker on tx keep a 1k resistor as a load and to keep the output capacitor charged pop should go Sent from my iPhone
By Engineer <Engineer21261@...> · #25312 ·
Re: PTT pop hack
Yes I tried this already, but I still got a pop each time I connected the pin to ground... 73, Allard PE1NWL
By Allard PE1NWL · #25311 ·
Re: PTT pop hack
Yes I think this may work if the mute unmute is a silent operation Sent from my iPhone
By Engineer21261@... · #25310 ·
Re: Function button inop
I have the same problem with Function button on A3 line. Already tried with external 10K pull-up resistor (as in SW line 646) and directly to the ground with://configure the function button to use the
By electronic design <electronicdesign@...> · #25309 ·
Re: PTT pop hack
Is there a way that we can use the mute feature of the lm386 on ptt.? The datasheet says ground I believe pin8 will mute the lm386 and this would eliminate the pop in the ear????
By Steve Greer · #25308 ·
Re: Blown bitx40
Fernando, for reference, the regulators i bought: https://www.ebay.com/itm/332061405265 i picked up some 5v regulators at the same time but it seems the bias regulators are ok on my boards (for the
By Jeff Bonanno <jeffbonanno@...> · #25307 ·
Re: Blown bitx40
hi Fernando, the regulator is U2, a SMD LM78L09. i am fortunate enough to have two bitx40 boards and was using one to diagnose a problem on the other. the problem quickly became apparent after burning
By Jeff Bonanno <jeffbonanno@...> · #25306 ·
Re: Bitx40 selfie
Hi Noel and all who made a comment about the selfie photos, Thank you When I was contemplating how to house my VU2ESE bitx40, I thought to keep the Raduino in a partial shielded enclosure knowing
By alf · #25305 ·
Re: 'Small as possible BITX40'
...the magnet has no noticeable influence
By geomad · #25304 ·
Re: 'Small as possible BITX40'
Researched this before the build - No influence was the research verdict (None detected after build either :) )
By geomad · #25303 ·
Re: 'Small as possible BITX40'
Here is the case details - see foto for details
By geomad · #25302 ·
Re: I think this is absolutely amazing!
Hi Horatio, ?I am also from Uruguay but living in England and my bitx40 was working ok until a moment of distraction led me to reverse the polarity of the battery with consecuence smoke in the asi
By Fernando Garcia · #25301 ·
Re: Weird magic smoke...
Hi John Smith, please do not leave the group, I have a diferente type of problems with my bitx and we need people like you for help and advice, do stay and pass your knoledge to all of us, we need
By Fernando Garcia · #25300 ·
Re: Blown bitx40
Hi Jeff bonanza, ?thanks for the reply, could you tell me what volage regulator blown on your set? I have now ordered the RF output and driver transistors so as to replace them and also fitted a
By Fernando Garcia · #25299 ·