Re: GPS corrected Arduino controlled VFO
Hi Gene ? I would be interested in a copy of the code ? 73 de Charlie GI4FUE ?
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From: [email protected] [mailto:[email protected]] On Behalf Of gene marcus
Sent: 18 February 2017 22:32
To: [email protected]
Subject: Re: [BITX20] GPS corrected Arduino controlled VFO ? Hello Bob, I authored the article that you are referring to. The article is located at: < >. ??I recently modified the code to run on the Raduino. ?GPS frequency correction?is optional. If anyone is interested in receiving a copy of the Raduino?version just send me an email. Gene W3PM GM4YRE No virus found in this message.
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Re: Bitx-40 No transmitter out
Great, concise explanation and solution. Thank you for sharing.
Marco - KG5PRT?
On Feb 18, 2017 5:31 PM, "alf" < fpdbase@...> wrote: Hi all,
?Went to use my bitx-40 and found no RF power output, started by checking the voltages on the IRF510, drain voltage was there, next check voltage on gate, zilch, nothing, narda.
Next check voltage to 78L05 regulator, yes 12.5V, check output, no 5V, next visual of regulator, looks like solder has not taken on the input pin:-( Difficult to see without a magnifier.
Re-solder the input pin, the output of regulator is now 5V, transmitter output restored.
?Semiconductor devices are very reliable if their maximum limits are not exceeded, most problems are usually related to connections in one form or another.
I suspect the junction between the solder pad and regulator had oxidized making the classic dry joint.
Alf vk2yac
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Bitx-40 No transmitter out
Hi all,
Went to use my bitx-40 and found no RF power output, started by checking the voltages on the IRF510, drain voltage was there, next check voltage on gate, zilch, nothing, narda.
Next check voltage to 78L05 regulator, yes 12.5V, check output, no 5V, next visual of regulator, looks like solder has not taken on the input pin:-( Difficult to see without a magnifier.
Re-solder the input pin, the output of regulator is now 5V, transmitter output restored.
Semiconductor devices are very reliable if their maximum limits are not exceeded, most problems are usually related to connections in one form or another.
I suspect the junction between the solder pad and regulator had oxidized making the classic dry joint.
Alf vk2yac
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Re: GPS corrected Arduino controlled VFO
Bob
I would be interested?
Art N2AJO
Sent from my iPhone
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On Feb 18, 2017, at 5:32 PM, gene marcus < gmarcus@...> wrote:
Hello Bob,
I authored the article that you are referring to. The article is located
at: < >. ??I recently
modified the code to run on the Raduino. ?GPS frequency correction?is optional. If anyone is
interested in receiving a copy of the Raduino?version just send me an email.
Gene W3PM GM4YRE
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Re: GPS corrected Arduino controlled VFO
Hello Gene Thank you for the article and additional info. ?I have a QRP-Labs VFO on my Bitx40 currently but I got the thing so I can play around with it. It sure has been a fun project. ?This is a good group of people to share ideas with.
73 Bob N1ETS
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Re: GPS corrected Arduino controlled VFO
Hello Bob,
I authored the article that you are referring to. The article is located
at: < http://www.knology.net/~gmarcus/Si5351/Si5351_VFO_QEX.pdf>. ??I recently
modified the code to run on the Raduino. ?GPS frequency correction?is optional. If anyone is
interested in receiving a copy of the Raduino?version just send me an email.
Gene W3PM GM4YRE
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 Just bought this enclosure ?message below is from another site I belong to ?you can email him?
at?Rapid3dprinting4u@... for info 73 art
Hi everyone. New to the page. I have made a couple boxes here lately for some local people and was wanting to offer my service to anyone needing an enclosure. ?I'd like to thank ?Ady Cattell for a nice design for this radio kit. I can do Blue, red, orange, white,and black. Pm for more details and a quote. Located in Vancouver, ?wa.
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I built a BITX40. It has a clicking noise in the audio different from the clicks from the Raduino when tuning. It appears to be a problem in the front end. When I first connected the antenna there was a great increase in band noise. When I can somewhat ¡°tune¡± a signal, it is just wide band grunting noise when the person talks. I¡¯ve made a movie of it and can post if anyone is interested.
Fahran said it may be the power supply so I switched to a 12 battery and still have the clicking. No real signal gets through. The audio works and the Raduino seems to tune frequency at least it reads 7.200 etc¡
Looking for suggestions. I built it in a plastic box so there doesn¡¯t seem to be a shorting problem. No cold solder joints. No loss toroids. Shortened all the cables and that did nothing.
Any suggestions would be appreciated.
Mark Underkofler W5MCU
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GPS corrected Arduino controlled VFO
A nice article in July/August 2015 QEX magazine. Looks like an easy build. Bob N1ETS
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Re: Bitx40 Audio AGC & S meter.
Thanks for that, I will have to go hunting parts then, should be fun as its years since I built something from scratch. The tips sheet is a welcome addition to my files, still looking for a decent enclosure, fancy re-cycling an old transceiver case. With mods to suit.
Phil-G7BZD
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Re: Bitx40 Audio AGC & S meter.
Hello Phil, You could look here for theses mods:
On Feb 18, 2017 11:21 AM, "philip yates" < phil@...> wrote: Hi.
Is there a Audio AGC & S meter kit anyone knows about, that I could either build or just purchase to install for use with my Bitx40. Phil - G7BZD
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Re: Greek SI5351 board. $8.90 USD
The boards from SV1AFN are superb. The Si5351 is available from Etherkit however, with a TXCO.? 73 Bob WA2I
Licensed long long ago in a place far far away...
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Re: BITX40 - no RX, no TX
Thank you?Ashhar for this informations,,, I found the damage but not on the ?filters coils, but one wire was torn off ?from ?trifilar T4 coil. I will try to fix it, or I will do a new T4.
And so as a curiosity, in better condition came BITX40 that was not packed in a plastic box .... but of course, something for something, we save on the shipping cost best regards Tom
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John yes that is what trying to say thank you ray after stroke I don't communicate well? Thanks Ray KC4DYM?
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On Feb 18, 2017, at 11:05 AM, Goran VE6GPO < goran.poprzen@...> wrote: I just want to add another huge Thank You to Ashhar! Bitx40 brought me back to my workshop, in a good way. And Thank You to every one of you in this group; your questions, answers, comments, etc. are great source of 'tribal knowledge' ... 73, Goran VE6GPO
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Re: Tell me -"WHY NOT, ASHBAR?"
Hopefully having fun, and maybe learning a bit. ?Looking like your original thought of a bad Si5351 was probably correct. ?Let us know what you find out.
On Sat, Feb 18, 2017 at 08:09 am, Goran VE6GPO wrote: BTW, for the purpose of my troubleshooting, I unsoldered Nano and put a socket instead (less than an hour of a job). It's not a hard thing to do. But, I'll be putting it back as soon as I'm done tinkering and noodling. ?
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Bitx40 Audio AGC & S meter.
Hi.
Is there a Audio AGC & S meter kit anyone knows about, that I could either build or just purchase to install for use with my Bitx40. Phil - G7BZD
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Re: AD 9850 DDS VFO ON BANGGOOD
Hi Larry, The difference is that the Indonesian xcvr is only about 1mW output so you will still have to add an amplifier. Also it's not a beginners project. There are quite a few mods for the kit on the facebook group page/s
Regards Lawrence (9H1AV)
On Sat, Feb 18, 2017 at 3:23 PM, Lawrence Macionski via Groups.Io <am_fm_radio@...> wrote: There is a 6 band QRP 5 watt Transceiver sold on Ebay and elsewhere.. That board is around $44... I have seen it in action on some Chinese YOUTUBE video.. Even with a very professional looking case. This is the VFO to that Transceiver. which brings us to again question the common sense of those that have purchased the BITX40 and are wishing to multi-band it... Especially when there is something like this out there. Think about this- BITX40 - 1 band $59 USD - but 6 bands transceiver board for? $44 USD approx and this DDS VFO for $35.83 USD for about $80 USD .? $20 USD more... I mean- I really enjoy my BITX40 V3 purchase, but it's 40 meters. It is, what it is. I think it is worth every penny. HOWEVER--? If I want more bands. 2-3-4-5? there is a proven alternate route. That also? addresses USB- LSB- CW- RIT- MEMORIES- VFO A- VFO B... de Larry W8LM ARRL Life Member - Licensed 50 years...
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If you get it running, I'd like to hear how performance and operating experience compares to the Bitx40 for casual SSB communications. ?Minimum price is $209, and then it's tethered to a computer plus soundcard. ?So not directly competing with the Bitx40.
On Sat, Feb 18, 2017 at 06:57 am, Lawrence Macionski wrote: I am one of 273 backers of this QRP 5 watt transceiver. ?
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Re: Tell me -"WHY NOT, ASHBAR?"
BTW, for the purpose of my troubleshooting, I unsoldered Nano and put a socket instead (less than an hour of a job). It's not a hard thing to do. But, I'll be putting it back as soon as I'm done tinkering and noodling. Cheers!
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I just want to add another huge Thank You to Ashhar! Bitx40 brought me back to my workshop, in a good way. And Thank You to every one of you in this group; your questions, answers, comments, etc. are great source of 'tribal knowledge' ... 73, Goran VE6GPO
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Charlie Morrison
q q
Goran VE6GPO