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Re: Raduino Noise


Mark W
 

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I¡¯m very happy with my $59 transceiver. I was under the impression from the beginning that this was not a money maker for those involved in the distribution but rather an effort to give those of us that like to learn and experiment an inexpensive platform to work with. The radio is for the most part delivered as a complete working radio for $59. We have all had the opportunity to work together to come up with ideas to improve our radios. There are plenty of other suppliers offering the Bitx kit for $200. Maybe that would be a better route for those of you that are so disappointed. Thanks to everyone involved. I read every one of these posts and am learning more every day.

Mark

K3MRK

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From: [email protected] [mailto:[email protected]] On Behalf Of ron van doremalen
Sent: Wednesday, January 25, 2017 1:24 PM
To: [email protected]
Subject: Re: [BITX20] Raduino Noise

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Then elecraft.com is your best choice. Kits, super support and according price level.

What do you expect from a $59 kit, including pcb, parts, mounting, shipping.

Ron ¨C PA3FAT

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Van: [email protected] [mailto:[email protected]] Namens John Jackson via Groups.Io
Verzonden: 25 January, 2017 19:09
Aan: [email protected]
Onderwerp: Re: [BITX20] Raduino Noise

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Ashar,

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The noise seems to be a common problem. ? When will you have an 'official' modification to fix the problem and incorporate in production units?? ? Forcing your frustrated customers to live with the noise or try various types of filtering on their own, risking damage to their radios, is not very good product support. ?Not having an official fix will negatively impact the reputation of your product. ?I would not buy another and could not recommend to anyone else to buy one.

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From: Ashhar Farhan <farhanbox@...>
To: [email protected]
Sent: Wednesday, January 25, 2017 10:49 AM
Subject: Re: [BITX20] Raduino Noise

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The bitx is essentially a direct conversion receiver with a crystal filter. that is, most of the gain is at audio frequencies. in fact, almost all of it is in the audio preamp. which is why you must treat it like a DC receiver when it comes to using a clean power supply

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On Sat, Jan 21, 2017 at 8:55 AM, DuWayne Schmidlkofer <duwayne@...> wrote:

The BITX 40 board appears to be very sensitive to noise introduced on the power line.? I had similar problems with both a? counter for frequency display and a home made si5351 VFO with OLED display using a Nano.? In both cases I added a 10mH.choke in the DC supply line and a 10uF capacitor to ground at the on the VFO or counter board.? This eliminated the noise except when I turned the volume all the way up and no antenna connected
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DuWayne? KV4QB

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