Received my Bitx 40 a couple of days ago Very pleased with the quality of the pub however the Arduino is faulty I believe
Symptoms
Display either all green or if pot adjusted a row of squares 5 volt regulator giving out 5volts No output to the board even when isolated On the Arduino board red power led on The L led is flashing I would say once per second and introducing noise on receiver As an electronics engineer for many years I would say the Arduino is faulty or not programmed How do I get it replaced Disappointed as I was looking forward to getting this project on air Any help would be appreciated Steve Barlow G4NVF
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Re: volume/tuning knob size. The outside diameter size, too
Yes, that worked. Thanks!
regards, Richard W2KAP 
On Thu, Mar 9, 2017 at 10:51 AM, Paul Warman via Groups.Io <pswarman@...> wrote: Richard, use the address without the /omg, that should be ok. ? Paul, G0odp ? From: [email protected] [mailto:[email protected]] On Behalf Of richard kappler
Sent: 09 March 2017 14:56
To: [email protected]
Subject: Re: [BITX20] volume/tuning knob size. The outside diameter size, too ? Fred, Your link doesn't work, throws a 404. 
? On Thu, Mar 9, 2017 at 1:36 AM, Fred Finster via Groups.Io <wb7odyfred=yahoo.com@groups.io> wrote: I am creating a Bitx40 design metal enclosure box.? Would be nice in this thread if you share the outside diameter of the knobs you chose. Also the outside diameter of the tuning control and volume control from measurement or from a datasheet.? I use this knowledge to verify clearance from other objects on the front panel and backside of front panel. ? Thank you for your small bit of help.? A few comments will help.? What color knobs do you prefer?? You might snap a small qvga size photo 320x240 and attach here if there is space or use some photo bucket website. Fred. ? . Photo of my metal case.
?
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Re: uBITX - A reboot of the old BITX
Thankyou Jerry - that answers my question quite well!
Now I need to toss all those HF-1 schematics and notes I've been making, and start again! Oh well, I knew it would be a long term project anyway...
Ben Holmes AK6BH
On Thursday, March 9, 2017 7:35 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
The uBitx is much the same rig as the HF-1, but with a year's worth of refinements. ?Most of the changes look like they will give better performance. ?A bigger and cleaner final, slightlly ?better RF amps, agc, support for CW. ?Folding all three oscillators into the Si5351 makes the uBitx easier to build and align. ?You will likely have more people to talk problems over with if you build the uBitx. ? Those curious what an HF-1 is will find it here: ?
On Thu, Mar 9, 2017 at 06:54 am, <judosandan@...> wrote:
I'm trying to relate the ubitx with the HF-1. Can someone compare these two projects? I ?
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Re: volume/tuning knob size. The outside diameter size, too
Richard, use the address without the /omg, that should be ok. ? Paul, G0odp ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of richard kappler
Sent: 09 March 2017 14:56
To: [email protected]
Subject: Re: [BITX20] volume/tuning knob size. The outside diameter size, too ? Fred, Your link doesn't work, throws a 404.
? On Thu, Mar 9, 2017 at 1:36 AM, Fred Finster via Groups.Io <wb7odyfred@...> wrote: I am creating a Bitx40 design metal enclosure box.? Would be nice in this thread if you share the outside diameter of the knobs you chose. Also the outside diameter of the tuning control and volume control from measurement or from a datasheet.? I use this knowledge to verify clearance from other objects on the front panel and backside of front panel. ? Thank you for your small bit of help.? A few comments will help.? What color knobs do you prefer?? You might snap a small qvga size photo 320x240 and attach here if there is space or use some photo bucket website. Fred. ? . Photo of my metal case.
?
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Farhan,
Thanks for the secret decoder ring ??
Randy
On Wed, Mar 8, 2017 at 9:54 PM, Ashhar Farhan <farhanbox@...> wrote: The number is like this : AB-xyz The xyz is the serial number within the batch B. A is not a number, it is the initial of the tester. 'F' is for farhan, 'U' is Uma, etc.? - f -?
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Re: uBITX - A reboot of the old BITX
The uBitx is much the same rig as the HF-1, but with a year's worth of refinements. ?Most of the changes look like they will give better performance. ?A bigger and cleaner final, slightlly ?better RF amps, agc, support for CW. ?Folding all three oscillators into the Si5351 makes the uBitx easier to build and align. ?You will likely have more people to talk problems over with if you build the uBitx. ? Those curious what an HF-1 is will find it here: ?
On Thu, Mar 9, 2017 at 06:54 am, <judosandan@...> wrote: I'm trying to relate the ubitx with the HF-1. Can someone compare these two projects? I ?
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Re: volume/tuning knob size. The outside diameter size, too
Fred, Your link doesn't work, throws a 404.
regards, Richard W2KAP
On Thu, Mar 9, 2017 at 1:36 AM, Fred Finster via Groups.Io <wb7odyfred@...> wrote: I am creating a Bitx40 design metal enclosure box.? Would be nice in this thread if you share the outside diameter of the knobs you chose. Also the outside diameter of the tuning control and volume control from measurement or from a datasheet.? I use this knowledge to verify clearance from other objects on the front panel and backside of front panel. ? Thank you for your small bit of help.? A few comments will help.? What color knobs do you prefer?? You might snap a small qvga size photo 320x240 and attach here if there is space or use some photo bucket website. Fred. ? . Photo of my metal case.
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Re: uBITX - A reboot of the old BITX
Hi Ash has,? First and foremost a super well done for you work. And secondly I too would be interested in a kit of parts. So if you decide to make a kit sign me in for one.? Regards and 73's? Mans 9h1gb?
On 6 Mar 2017 23:45, "Richard Spohn" < wb2gxm@...> wrote: Ashhar, I for one (among many, I suspect) would jump at the chance to
purchase a uBitx kit from you / HFSigs.com.? Please, please develop
the uBitx into a kit!? Thanks again for the Bitx xcvrs! - Rich
On 3/3/17, Ashhar Farhan < farhanbox@...> wrote:
> It has been more than a decade since the BITX20 was first built. In these
> years, we have had many ideas knocking around. After looking hard at these,
> it became evident to me that a full reboot of the bitx series was needed to
> incorporate these.
>
> Raduino has been a game changer in many ways. It would have been
> unimaginable even a few years ago that for a dollar, you would be able to
> buy a single chip with three clock outputs for less than a dollar.
>
> Anyway, here is the new uBITX (I pronounce it as microBITX). I hope you all
> find it interesting. Unlike the Minima this is full tested and ready to be
> built.
>
> You can read about it on . It
> hasn't still made it to my home page. If you find any typos or anything
> that is not clear, push the reply button on this mail thread and I will fix
> it before it goes out to the world outside the
>
> There is no kit for it. As usual, the circuit is free for you to build,
> write about, forward and publish it wherever. However, commercial
> production of PCBs and kits is prohibited for now.
>
> Will HFsigs kit it? I am not sure. They are already swamped with a backlog
> of the bitx40 orders. I will have a conversation with the team and ask them
> about it.
>
> It goes without saying that without the help of so many of you this rig
> would never been possible. It is a joint effort of several people who have
> been helping along with things big and small.? Curiously, this rig derived
> much of its theory from an older text : Introduction to RF Design by
> Hayward. Hence, you will see it in the pictures of the rig too.
>
> - f
>
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Re: uBITX - A reboot of the old BITX
I'm perhaps a little slow, but I'm trying to relate the ubitx with the HF-1. Can someone compare these two projects? I have something in the works right now, but I'm looking already for my next project, and until the ubitx came up, I was taking a serious look at the HF-1 But I'd hate to build the HF-1 if the ubitx is a superior design! Can someone help an old fogie wrap his mind around these two projects?
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A Band Scope for the BITX
Get a 13 dollar RTL-SDR Dongle and find a discarded Android phone.? Soon you can be watching the entire 40 meter band. Check out the article by Ken Marshall G4IIB:
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Y'know...with all these Bitx's out there...we could have our own
weekend QSO contest! I can hear it now! "See-Kew See-Kew Bit-Ex
See-Kew Bit-Ex..." -- contesters could exchange RST report, grid
square and their Bitx serial number to qualify! Of course after the
official exchange, the contest would probably go off the rails as
contesters continue to expound on all the mods they've completed in
their Bitx's...and after the weekend ends, find out after describing
all the add-ons to their radios that they've only completed five
qualifying exchanges. And then of course there's the contest subgroup
that would exchange Bitx QSOs via CW... Oh, BOY this would be a
glorious weekend, indeed!!!! -- Rich
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Re: volume/tuning knob size. The outside diameter size, too
I am creating a Bitx40 design metal enclosure box. ?Would be nice in this thread if you share the outside diameter of the knobs you chose. Also the outside diameter of the tuning control and volume control from measurement or from a datasheet. ?I use this knowledge to verify clearance from other objects on the front panel and backside of front panel. ? Thank you for your small bit of help. ?A few comments will help. ?What color knobs do you prefer? ?You might snap a small qvga size photo 320x240 and attach here if there is space or use some photo bucket website. Fred. ? Http://kliktel.org/bitx40/omg. Photo of my metal case.
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Just got my BITX40, just checked the serial number and it reads
"O317". - Rich WB2GXM
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On 3/8/17, Thomas Noel <tnoel@...> wrote: Just a running total of how wildly successful this device has become.
Thomas W Noel
KF7RSF
On Mar 8, 2017, at 9:57 AM, Daniel Acevedo <dan.ace86@...> wrote:
Just curious, what does the serial number tell you?
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The number is like this : AB-xyz The xyz is the serial number within the batch B. A is not a number, it is the initial of the tester. 'F' is for farhan, 'U' is Uma, etc.? - f -?
On 9 Mar 2017 10:01 a.m., "AndyH" < ahecker@...> wrote: Hi Randy, Here's a bit more data for your list 73, Andy KG5RKP ?869 ?11/19/2016 ?11/22/2016 ?12/19/2016
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Hi Randy, Here's a bit more data for your list 73, Andy KG5RKP ?869 ?11/19/2016 ?11/22/2016 ?12/19/2016
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An ancient Polynesian boat building technique as in Kon Wiki.... J/K, it's is a play on Google Fu which is a measure of a person's ability to find things on Google. James
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Re: Finding an AGC circuit with fast/slow attack
Found this on? eBay item number:?271695585529
10 available from Isreal-free shipping Hope this helps 73 WA9DOH GEC PLESSEY SL611C, RF/IF Amplifier, Wide AGC Range: 50dB
On Wed, Mar 8, 2017 at 3:25 PM, Henning Weddig via Groups.Io <hweddig@...> wrote:
Folks,
I made simulations on a "discrete version" of the SL611
(component values from the Plessey 1975 data book) using LTSPICE
and then upon success with teh simulaiton I also made a pcb
layout. There is also a discrete version of the SL621 as a layout
(I am using EASY PC). For unknown reasons I can not upload the pdf
files into my folder (DK5LVs stuff)
Can somebody advise how to upload?
Henning
DK5LV
Am 08.03.2017 um 21:33 schrieb William
Kimber:
Somewhen in the past there was a version of the SL621 AGC
circuit made with individual transistors.? Try searching the
RSGB handbook or tech topics.
Cheers,
William
On 03/09/2017 08:38 AM, Doug - via
Groups.Io wrote:
Chuck,
? I am very interested in an AGC circuit for the BITX40. I
have already installed a new audio output amp - LM386 - that
works substantially better but on strong signals and a good
antenna there is distortion from some point onboard. Having to
ride the volume is a pain in the you know what. I was looking
at my radio-engineer handbook and one of the AGC circuits they
show uses the Plessy Sl621 AGC chip. I doubt it is still
available but if it was it would make things very simple.
Google it, the PDF data is still out there. This uses audio to
establish AGC that could be applied in some way to probably Q1
on the BITX board.
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Re: Finding an AGC circuit with fast/slow attack
or you could do
worse than check out the IF AGC (and S Meter) approach used by
Eamon Skelton EI9GQ in his various rig designs. A google
seatrch will find them. I intend to use one of his designs,
which are all generally similar and also echo the "epitome" IF
AGC design that Ashar champions.
Bill, VK7MX
On 9/03/2017 7:33 AM, William Kimber
wrote:
toggle quoted message
Show quoted text
Somewhen in the past there was a version of the SL621 AGC
circuit made with individual transistors.? Try searching the
RSGB handbook or tech topics.
Cheers,
William
On 03/09/2017 08:38 AM, Doug - via
Groups.Io wrote:
Chuck,
? I am very interested in an AGC circuit for the BITX40. I
have already installed a new audio output amp - LM386 - that
works substantially better but on strong signals and a good
antenna there is distortion from some point onboard. Having to
ride the volume is a pain in the you know what. I was looking
at my radio-engineer handbook and one of the AGC circuits they
show uses the Plessy Sl621 AGC chip. I doubt it is still
available but if it was it would make things very simple.
Google it, the PDF data is still out there. This uses audio to
establish AGC that could be applied in some way to probably Q1
on the BITX board.
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Fred Finster
