Date   

Re: Implement a uBITX Memory Manager Program

Jack, W8TEE
 

The Arduino delay() function is a blocking function, which means the delay() does not disable interrupts and means that interrupt events can be missed. You can write your own delay routine that does disable interrupts which queues the interrupt(s). Most programmers who are using interrupts write their own delay routine. See:




Jack, W8TEE



From: Pavel Milanes Costa <pavelmc@...>
To: BITX20@groups.io
Sent: Wednesday, January 10, 2018 1:51 PM
Subject: Re: [BITX20] Implement a uBITX Memory Manager Program

You are asking for a hammer to break an egg.
A quick search of the word "delay(" in the ubitx sources returned 52 hits, with a quite amount of them being 500 msec or more.
Get rid of the blocking delays and the CAT control will work flawlessly. Been there done that for a project.
Note: you can do a dirty hack and build a fast as hell non blocking delay of any length routine breaking the amount of time by smaller chunks and check for serial commands in the meanwhile, 10 millis worked for me... but this is a dirty trick, you can also try to reprogram the routines that depends on delays with a account for millis instead or thinking out of the box... at the end refactoring will lead to a smaller firmware that the dirty hack...
Even with interrupt routines (that you don't use) it can be worked out, they can be changed to work in "flag flip, do next" instead of "do this code right now" and it will work.
73 Pavel CO7WT.


El 10/01/18 a las 11:51, Ian Lee escribió:
If you are wondering about RTOS, I think RTOS should be monitoring most interrupts as much as possible.

However, the questioner is curious about the timeout. Timeouts will only occur in the original source of uBITX.
Suppose that you press the menu button once and wait for the next button in the while statement.
Let wsjt-x transmit the protocol that reads the frequency once every 500ms, and if there is no response, it displays an error and disconnects.
When the user presses the button to select the menu and wonders whether to move the band or change the CW tone, 500ms flows and wsjt-x displays an error and disconnects.

This is a problem that can be easily solved using an interrupt or an RTOS. 
For this reason I talked about the interrupt and the RTOS. If you are wondering about RTOS, please feel free to ask.
I will explain in detail what I know.

2018-01-10 23:28 GMT+09:00 Michael Monteith via Groups.Io <michael_r_monteith@...>:
Ian,
 I've been wondering if RTOS might be an option to handle all the interrupts etc?
https://www.freertos.org/

73, Michael
KM4OLT


--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

-- 
73 CO7WT, Pavel.



Virus-free. www.avast.com


Re: Trouble With Alternate Audio Inputs (BITX40 Module)

Jim Sheldon
 

I suspect they sent 75 Ohm BNC connectors with the kits. 75 Ohm connectors have a larger center pin. Had same problem and once I replaced mine with the right 50 Ohm type, that problem went away.

Jim, W0EB

On Jan 10, 2018, at 1:19 PM, bill richardson <ng1p.bill@gmail.com> wrote:

I had an issue with the BNC connectors that came with my bitx40s. The center conductor was making a poor connection and I too had no output. I replace the BNC connector with a new one and all set now.

Sent from my iPhone

On Jan 10, 2018, at 9:56 AM, Gordon Gibby <ggibby@anest.ufl.edu> wrote:

Do you have something to detect the presence of radio frequency energy?

A general purpose communications receiver would do fine for this. Just tune it to the various places that energy should show up as the heterodyning takes effect, and Leigh a short insulated antenna wire over the appropriate portion of the Bitx40 circuitry and see if there’s energy there.

If you don’t have that, you could make a small high input impedance RF detector with a small signal diode, 2 capacitors and a high-in put impedance voltmeter. Like a five dollar harbor freight digital voltmeter.

Then just follow the signal chain.

Sent from my iPhone

On Jan 10, 2018, at 09:33, Michael Davis <maddmd818@comcast.net> wrote:

Well, I am ready to attempt to troubleshoot my Bitx40 mic input circuit. I printed the mic circuit and will attempt to either inject an audio signal along the mic input line into Q12 and then to the trifilar transformer. After that I'm lost. First I'll replace the electret capsule, just in case it is defective. It does have 3.99 vdc at its contacts when PTT is pressed. Feel free to chime in either in forum or to me individually. It was working so well and suddenly no transmit. All transistor voltages measured normal, including the IRF510 in receive and transmit. Thanks

Sent from Mike's iPad WA1MAD









Re: Amplifier Kit?

AndyH
 

Rob,

   I can also recommend the WA2EBY linear - it works great with my BITX40v3 using a 7dB pad.  The next linear I'll build is the EB63A from Communication Concepts.  It's been confirmed to work with a number of QRP rigs including various BITXs.  Like the WA2EBY amp, it has an RF-operated keying relay circuit so requires no radio mods.
http://www.communication-concepts.com/eb63a-140w-hf-amplifier/
http://soldersmoke.blogspot.com/2014/11/oh-no-soldersmoke-goes-qro-bills.html

   If you decide on the WA2EBY amp, I suspect you'll find it to be a beginner-friendly project.  It's easy to build and adjust, especially with Leonard, KC0WOX's parts list, source links, and build instructions.  His Mouser project list covers all of the parts.  While a couple of the specific numbers are obsolete, Mouser has plenty of replacements.  When I load the list today, I see that we need an alternative for a 500V mica cap, an SMD cap, and a relay snubber diode.
https://www.mouser.com/Passive-Components/Capacitors/Mica-Capacitors/_/N-5g97Z1yzvvqx?P=1z0x6fr&Keyword=1500pf+500v+mica&Ns=Pricing%7c0&FS=True
https://www.mouser.com/ProductDetail/KEMET/C1206C470J5GACTU/?qs=%2fha2pyFaduhj4YtAUYl%252b9fuwN6gIhX5Y0mIEIemTc%252bkLaweq9tYXxg%3d%3d
The diode can be any 1N4004 or similar.
   
    Best,
     Andy, KG5RKP


On Wed, Jan 10, 2018 at 07:13 am, Rob N4RMK wrote:
I hope this isn’t too far off-topic to ask here.  I’ve looked for an amplifier kit similar to the Bitx radio.  Does anyone here know of such a kit?  

de N4RMK 


Re: Trouble With Alternate Audio Inputs (BITX40 Module)

bill richardson
 

I had an issue with the BNC connectors that came with my bitx40s. The center conductor was making a poor connection and I too had no output. I replace the BNC connector with a new one and all set now.

Sent from my iPhone

On Jan 10, 2018, at 9:56 AM, Gordon Gibby <ggibby@anest.ufl.edu> wrote:

Do you have something to detect the presence of radio frequency energy?

A general purpose communications receiver would do fine for this. Just tune it to the various places that energy should show up as the heterodyning takes effect, and Leigh a short insulated antenna wire over the appropriate portion of the Bitx40 circuitry and see if there’s energy there.

If you don’t have that, you could make a small high input impedance RF detector with a small signal diode, 2 capacitors and a high-in put impedance voltmeter. Like a five dollar harbor freight digital voltmeter.

Then just follow the signal chain.

Sent from my iPhone

On Jan 10, 2018, at 09:33, Michael Davis <maddmd818@comcast.net> wrote:

Well, I am ready to attempt to troubleshoot my Bitx40 mic input circuit. I printed the mic circuit and will attempt to either inject an audio signal along the mic input line into Q12 and then to the trifilar transformer. After that I'm lost. First I'll replace the electret capsule, just in case it is defective. It does have 3.99 vdc at its contacts when PTT is pressed. Feel free to chime in either in forum or to me individually. It was working so well and suddenly no transmit. All transistor voltages measured normal, including the IRF510 in receive and transmit. Thanks

Sent from Mike's iPad WA1MAD








Re: Micro-BITX ... Lost in post ? Possibly

Marc Jones
 

The three BITX-40's I ordered were here in no time at all ... 


Regards 

On Wed, 10 Jan 2018 at 13:58, Marc Jones via Groups.Io
<gw0wvl@...> wrote:
I had confirmation that my Micro-Bitx was posted on the 12 the December, Tracked to Mumbai airport  on the 15 the December, Then it seems to have got lost, Various phonecalls to Royal mail with the tracking number has turned up a blank, Its not on there system, A few emails to HF SIG's , And I've been told it won't get lost in the post .....Time is ticking on, Perhaps its wedged behind a seat in a Royal mail van ? .... Who knows ... Ile give it another week in case it does turn up , If not ile have to email HF SIG's again and go from there .... British postal services can be hit SNF miss st the best of times .



Re: Micro-BITX ... Lost in post ? Possibly

Joe
 

Also waiting here in Canada
Ordered Dec 10 - shipped 12th Dec

Joe
VE1BWV



On Wed, Jan 10, 2018 at 12:11 PM, Tom, SQ9DJE <tomasz@...> wrote:
be patient, I have exactly the same, I am waiting, I think it will come soon


Tom, SQ9DJE



Re: Implement a uBITX Memory Manager Program

Pavel Milanes Costa <pavelmc@...>
 

You are asking for a hammer to break an egg.

A quick search of the word "delay(" in the ubitx sources returned 52 hits, with a quite amount of them being 500 msec or more.

Get rid of the blocking delays and the CAT control will work flawlessly. Been there done that for a project.

Note: you can do a dirty hack and build a fast as hell non blocking delay of any length routine breaking the amount of time by smaller chunks and check for serial commands in the meanwhile, 10 millis worked for me... but this is a dirty trick, you can also try to reprogram the routines that depends on delays with a account for millis instead or thinking out of the box... at the end refactoring will lead to a smaller firmware that the dirty hack...

Even with interrupt routines (that you don't use) it can be worked out, they can be changed to work in "flag flip, do next" instead of "do this code right now" and it will work.

73 Pavel CO7WT.


El 10/01/18 a las 11:51, Ian Lee escribió:
If you are wondering about RTOS, I think RTOS should be monitoring most interrupts as much as possible.

However, the questioner is curious about the timeout. Timeouts will only occur in the original source of uBITX.
Suppose that you press the menu button once and wait for the next button in the while statement.
Let wsjt-x transmit the protocol that reads the frequency once every 500ms, and if there is no response, it displays an error and disconnects.
When the user presses the button to select the menu and wonders whether to move the band or change the CW tone, 500ms flows and wsjt-x displays an error and disconnects.

This is a problem that can be easily solved using an interrupt or an RTOS. 
For this reason I talked about the interrupt and the RTOS. If you are wondering about RTOS, please feel free to ask.
I will explain in detail what I know.

2018-01-10 23:28 GMT+09:00 Michael Monteith via Groups.Io <michael_r_monteith@...>:
Ian,
 I've been wondering if RTOS might be an option to handle all the interrupts etc?
https://www.freertos.org/

73, Michael
KM4OLT


--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

-- 
73 CO7WT, Pavel.


Re: My µBITX in its new home

Brian L. Davis
 

I have found that acetone will often soften or dissolve epoxy bonding agents.
Just thought I'd toss that out.


Re: Micro-BITX ... Lost in post ? Possibly

G1KQH
 

Mines in the same bag too I guess?

As tracking says the 12th too!

India post time delay seems to be between a month and 8 weeks..

Plus we all ordered at the busy time of December, Xmas season so everything is backlogged.

You can bet it's like budget airlines when there is enough room in the hold they fire a bag in there, until then they stop locked in a room at Mumbai

Don't panic! We are all in the same boat.


73 Steve


Re: Amplifier Kit?

Vince Vielhaber
 

They say the EBY amp puts out 40 watts with a 28v supply. What's the current draw on that?

Vince.

On 01/10/2018 10:24 AM, N8DAH wrote:
Only ones I know of are the Hardrock-50, HFpacker and the WA2EBY. All
but the last one are total kits and cost 300+

I just built up a WA2EBY amp and am pretty happy with it so far.

I got the pcb's from
https://amateurradiokits.in/product/hf-linear-amp-40-watts/

Toroids http://kitsandparts.com/WA2EBY_toroidkit.php

Build notes http://www.golddredgervideo.com/kc0wox/wa2ebyamp/

I would suggest if you choose the WA2EBY option be sure to do a proper
parts list as the on from the link in the build notes is a bit outdated.



73

GL

David

N8DAH


Re: #ubitx Re: Ubitx only on preorder now #ubitx

Art Howard
 

I got confirmation of payment on the 12th of December for my radio also and I also paid for DHL. Hopefully I will get some communication soon

On 10 Jan 2018 6:09 am, "Sr Shobe" <osageshobe@...> wrote:
Ordered uBitX on 12  Dec... got DHL number Monday! Yipeeee... can't wait!! Steve/N0AAH 



On Jan 10, 2018 4:04 AM, "Mvs Sarma" <mvssarma@...> wrote:
Perhaps the uBITX is sold as semi knocked down.
 Mostly assembled. Either you purchase and enjoy doing minor mounting fitting etc and get the quality adjusted in factory,
 or make one yourself using the schematic and resources provided on the bitex site and obviousl;y the designer's site. ,
Ujjwal jee best of 2018. Seeing you on a site after a long time, sir.
 
regards
 mvs sarma
 vu3zmv
 
 

Regards
MVS Sarma
 

On Wed, Jan 10, 2018 at 1:43 PM, <ujjwalis@...> wrote:

Hi Ashhar,

Are you planning to offer the amazing uBitX as "Kit Form" or just the PCB ? 

I got into Ham for the Sheer joy of Home brewing and would love to build the TRx by myself, one Coil at a time ?  I have build a NR60 in class 9th from scratch including Screen printing /etching  PCBs and winding all the coils and look forward for similar challenge building your latest creation! 

 

73's 

Ujjwal  

 



Re: Micro-BITX ... Lost in post ? Possibly

Art Howard
 

 Got confirmation of payment on December 12th and I paid $119 PayPal for DHL so I'd get it quicker shipment but have heard nothing since the payment confirmation.

On 10 Jan 2018 7:58 am, "Marc Jones via Groups.Io" <gw0wvl=yahoo.co.uk@groups.io> wrote:
I had confirmation that my Micro-Bitx was posted on the 12 the December, Tracked to Mumbai airport  on the 15 the December, Then it seems to have got lost, Various phonecalls to Royal mail with the tracking number has turned up a blank, Its not on there system, A few emails to HF SIG's , And I've been told it won't get lost in the post .....Time is ticking on, Perhaps its wedged behind a seat in a Royal mail van ? .... Who knows ... Ile give it another week in case it does turn up , If not ile have to email HF SIG's again and go from there .... British postal services can be hit SNF miss st the best of times .



Re: My µBITX in its new home

James Lawrie
 

Never would have thought alcohol would work for hot glue? I hot glued a knob to a cheap encoder module that I was trying to use a couple years back since the knob was surplus aluminum but no set screws. When I was done I gently heated the knob till glue was soft enough to wiggle off, the knob is worth more than encoder.

I’ll have to try the alcohol next time, I’ve tried acetone before not much luck. Thanks for the idea.

James Lawrie

On Jan 10, 2018, at 09:56, Louis Katz via Groups.Io <louiskatz=yahoo.com@groups.io> wrote:

I have not used this method but people use alcohol water mixtures to remove hot glue. But it appears that not all hot glue is the same material. It is not an immediate softening. It does not mix safely with the heat gun technique.
I have used a strip of brass shim stock inside a knob and a slice of aluminum can would not be beyond me.
73 Louis w0it
Mine has shipped. No word yet on delivery. Ordered 12 December.
On Jan 10, 2018, at 3:10 AM, James Lawrie <lawriejk@gmail.com> wrote:

Use a heat gun to soften the glue, should come off then.

James Lawrie

On Jan 9, 2018, at 17:35, Keith VE7GDH <ve7gdh@rac.ca> wrote:

Jack W8TEE wrote...

However, even the 3mm knob I have seems wobbly...
it may not actually be metric, but a 1/8" knob.
Again, I'm still waiting for my uBITXs to show up. The
shaft diameter on the knob I picked up for my BITX40 was
too large even though it was the size specified. I wish
I had thought about heat-shrink back then. I ended up
putting a squirt of hot-melt glue in the knob before
putting it on the volume control shaft. It will be
interesting if I ever have to remove it!

--
73 Keith VE7GDH






Re: Micro-BITX ... Lost in post ? Possibly

philip yates
 

Looks like mine is still showing at Mumbai Air, or some black hole after. Royal Mail here do not 
recognise the number other than its an India Post parcel....

Phil - G7BZD

On Wed, Jan 10, 2018 at 6:18 PM, David S via Groups.Io <dcsuk10@...> wrote:
Hi Guys

I'm in the same boat, it went into a bag on December the 15th, nothing since, at least there a few of us G's in the same position, it's a bit of a concern all the same.

Regards

David S G8DJM



Re: Micro-BITX ... Lost in post ? Possibly

David S
 

Hi Guys

I'm in the same boat, it went into a bag on December the 15th, nothing since, at least there a few of us G's in the same position, it's a bit of a concern all the same.

Regards

David S G8DJM


Re: Micro-BITX ... Lost in post ? Possibly

Charlie Morrison
 

Hi Mark

 

Mine posted same date as yours, tracked to Mumbai 15th as well, still not arrived…maybe they’ve become lovers and eloped ;-)…seriously I haven’t emailed HF Sigs yet, maybe I should in case a bag of them have gone missing

 

73 de Charlie GI4FUE

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Marc Jones via Groups.Io
Sent: 10 January 2018 13:54
To: BITX20@groups.io
Subject: [BITX20] Micro-BITX ... Lost in post ? Possibly

 

I had confirmation that my Micro-Bitx was posted on the 12 the December, Tracked to Mumbai airport  on the 15 the December, Then it seems to have got lost, Various phonecalls to Royal mail with the tracking number has turned up a blank, Its not on there system, A few emails to HF SIG's , And I've been told it won't get lost in the post .....Time is ticking on, Perhaps its wedged behind a seat in a Royal mail van ? .... Who knows ... Ile give it another week in case it does turn up , If not ile have to email HF SIG's again and go from there .... British postal services can be hit SNF miss st the best of times .

 

 

 


AVG logo

This email has been checked for viruses by AVG antivirus software.
www.avg.com




Re: Micro-BITX ... Lost in post ? Possibly

m0icr@...
 

Mark, 

You and I are in an almost identical situation, I live in London UK. Day 31 here.

I ordered my uBitx on 10th December (first-batch order, like yours), my package was also tracked into and *out of* the Mumbai 'Office of Exchange' on 15th December as confirmed at http://www.parcelcode.com/Tracking/Track
I haven't chased it with HF Sigs yet but there seems little point unless to arrange for a replacement to be sent but I am now starting to wonder at what point this is the best course of action (see below and the latest from Royal Mail)? The radio was a Christmas present to myself, I knew it was very unlikely to arrive before Christmas but I really did expect it to have arrived by now. 

I have also seen or heard nothing since Mumbai. I too have spoken with the UK Royal Mail and they have no record of the tracking number as issued by India Post and to back this up the tracking number is not recognized as valid on the UK Royal Mail online tracking system. As far as the UK Royal Mail is concerned my package is not on the UK system and they can not confirm where it is, if indeed it has arrived in the UK at all. That *is* a concern.  https://www.royalmail.com/track-your-item#/

For further confirmation, I have *this morning* spoken with Customer Services at the London Heathrow Worldwide Distribution Centre (HWDC) (Tel UK 0843 548 8217) via Royal Mail customer services, which is the UK main sorting office for international mail sent by air to the UK, and they are (1) Unable to track my package, (2) Have assured me that they are *not* suffering a major backlog. UK Royal Mail are quite clear - the package has *never* been on their system. *This afternoon* the advice of the UK Royal Mail parcel tracking team (Tel UK 0345 774 0740), using my India Post tracking number as reference was that: (1) The Parcel should be here by now and that they strongly recommend initiation of what they called a 'postal investigation' which must be started by *the sender* through India Post, and that India Post would then liaise with UK Royal Mail, I was also advised that an investigation can take up to 8 weeks. They also confirmed that they are not aware of any backlog in UK customs (HMRC) clearances at their international handling centre and in fact said that typical handling time was (quote) "5 days or less at the moment *because* of Christmas".

I assume (or more accurately, I fear) that this proposed 'postal investigation' would involve continued delay whilst the package is located and/or any remedial action is taken, ie. a claim for the loss is submitted and then eventually a replacement (back log permitting) is sent? Ouch.

Where does the responsibility now rest to sort this out because from what I have heard from UK Royal Mail today they don't think that this is their problem furthermore I am sure that the solution is no longer about just being patient!

To be clear, in no way is this a personal criticism of Farhan or the excellent innovations and fun he has brought to the amateur radio community, or the fantastic work he continues to do to offer worthwhile employment opportunities to ladies in India, but it is a genuine concern from a customer (and Bitx enthusiast) who simply wants to enjoy their new radio but who is now starting to fear that their package could be lost/taken and that it's going to be months before a uBitx arrives.

Of course it could arrive tomorrow despite what the UK Royal Mail have told me today ... stranger things have happened!

 

73 Carl M0ICR


Re: Micro-BITX ... Lost in post ? Possibly

philip yates
 

Mines probably with yours, somewhere between here and there.

Phil - G7BZD

On Wed, Jan 10, 2018 at 1:54 PM, Marc Jones via Groups.Io <gw0wvl@...> wrote:
I had confirmation that my Micro-Bitx was posted on the 12 the December, Tracked to Mumbai airport  on the 15 the December, Then it seems to have got lost, Various phonecalls to Royal mail with the tracking number has turned up a blank, Its not on there system, A few emails to HF SIG's , And I've been told it won't get lost in the post .....Time is ticking on, Perhaps its wedged behind a seat in a Royal mail van ? .... Who knows ... Ile give it another week in case it does turn up , If not ile have to email HF SIG's again and go from there .... British postal services can be hit SNF miss st the best of times .




Re: how to set bfo

Gordon Gibby <ggibby@...>
 

The software for automatic link establishment also turns out show you a spectrum analyzer in bar chart form.  Just by watching the waterfall in FL DGI or other software you probably got a intuitive understanding as well.

Sent from my iPhone

On Jan 10, 2018, at 12:41, Rod Self <km6sn@...> wrote:

Dave,

Thanks. I dug into the software and  found out how to get into setup. OK now.

r.e. the BFO - as you know, the receiver on a ubitx is a 12 MHz fixed-frequency receiver. USB/LSB switching is done in the previous mixing stages. Using band-noise as a wideband signal source, if one views the ubitx audio output on an audio spectrum analyzer, it should be quite easy to set the BFO frequency to a desirable setting.

On Linux there is a great open-source audio spectrum analyzer called JAAA. On garden-varitey USB sound cards you can see at least an 80 db range. I will use JAAA to view the ubitx audio spectrum and set the BFO accordingly. Then, in the ubitx.ino code, one can tweak the SECOND_OSC_USB and SECOND_OSC_LSB constant definitions to achieve balance when switching sidebands.

I am sure there are useful audio spectrum analyzer programs for Windows and Mac, which would work equally well.

That is my plan for today; I will travel to my shop and will let you know how it works out.

Cheers,

Rod KM6SN


On 01/10/2018 08:59 AM, Dave Bottom wrote:
Rod,

When in SETUP keep turning the knob clockwise and finally BFO Set will appear.  It always starts at the same default frequency (this should be fixed and display the current frequency setting) but then you can change the BFO.  Record your setting so you can try different values, but listening while adjusting on a SSB station works (sort of).

Dave WI6R

On Tue, Jan 9, 2018 at 1:55 PM, Rod Self <km6sn@...> wrote:

Hi All,

How does one get into setup to set the BFO frequency? The instructions on the web site appear not to work.

Rod KM6SN





--
73 Dave WI6R


Re: Micro-BITX ... Lost in post ? Possibly

David Holland
 

Mine was ordered on the 9th December, posted on the 12 and "Put into the bag"? at Mumbai airport.  I guess that the "Bag" must be pretty full by now!!!

David G4LDT


On 10/01/2018 13:54, Marc Jones via Groups.Io wrote:
I had confirmation that my Micro-Bitx was posted on the 12 the December, Tracked to Mumbai airport  on the 15 the December, Then it seems to have got lost, Various phonecalls to Royal mail with the tracking number has turned up a blank, Its not on there system, A few emails to HF SIG's , And I've been told it won't get lost in the post .....Time is ticking on, Perhaps its wedged behind a seat in a Royal mail van ? .... Who knows ... Ile give it another week in case it does turn up , If not ile have to email HF SIG's again and go from there .... British postal services can be hit SNF miss st the best of times .


Mark  'Gw0wvl' ...