Date   
Re: adrino

wb7dmx@att.net
 

super starter kit r3

Junkyard uBITX #ubitx

Rob Snow
 

I've seen a ton of beautiful uBITX builds, I thought I'd add my junkyard build that I just completed earlier for the other end of the spectrum.  My wife was going to throw the tin away, so I grabbed it.  Some drilling and snips later and it is alive!  I've got the WX audio chip, so I installed a 8ohm + 8ohm speaker and am running it at 12.0v from 13.8v with a step down that is pictured.

Tried some 80m and 40m earlier, but it's pretty horrible tonight.  I could hear a few folks, but no response to CQ so far.



73
Rob
AG5OV

Voltage/Waveform chart?

ag4qc38313
 

With so many people working on modes for the xBitx. Has anyone created a chart or schematic notes with expected voltage/resistance or waveforms expected at some points along paths in working radios?  This sort of information could help a lot when questioning yourself if levels look different then one expected.

Joe Loucka  AG4QC

Re: Soldering gun or iron

Jerry Gaffke
 

Between 15 and 40 years ago, I'd spend a year or more at a time on the road when fed up with cubicle life.
All my gear in one well stuffed daypack, but still enough to sleep rough when needed.
Being geekish, found room for a miniature SW receiver and DVM, and some basic tools.
Tools included some screwdriver bits, a soldering pencil tip, hanks of wire and solder, the tiniest visegrips offered.
Occasionally found reason to do some soldering, using a butane cigarette lighter to heat the tip.
In mainland China in 1990, soldered up my broken wire rimmed glasses, using copper wire to reinforce the break.
That one was with direct application of the flame, the tip didn't give enough heat.

On 03/16/2018 05:40 AM, David Wilcox via Groups.Io wrote:
I think this was intended as a tongue in cheek joke.
Nope, not a joke.  Sometimes do solder with a propane torch.
Next in line is the oxy-acetylene torch.

Haven't used either on the uBitx yet, but it would make short work of removing a WX clone.
OK, now that's a tongue in cheek joke.

Jerry, KE7ER


On Fri, Mar 16, 2018 at 10:39 am, Steve Thatcher wrote:
Can't resist this story: I was at my rather remote shack in Alaska with limited tools.  The brand-new ICOM mic for my old 725 had a bad connection in the PTT circuit.  Of course I took it apart to fix, and, of course, the broken wire was that smaller-than-a-hair stuff.  With no soldering iron, I had to improvise.  Propane torch on the bench heating a #16 nail held by vise grips supported by the bench vise, using big plumbing-size solder.  Mic works to this day.  Lucky I didn't burn the shack down.....Those 3-in-1 rework stations look pretty tempting....Aloha, Steve WH6ST

Re: Junkyard uBITX #ubitx

Gordon Gibby <ggibby@...>
 

Rob:  looks beautimus!!


On Mar 17, 2018, at 22:07, Rob Snow <rsnow@...> wrote:

I've seen a ton of beautiful uBITX builds, I thought I'd add my junkyard build that I just completed earlier for the other end of the spectrum.  My wife was going to throw the tin away, so I grabbed it.  Some drilling and snips later and it is alive!  I've got the WX audio chip, so I installed a 8ohm + 8ohm speaker and am running it at 12.0v from 13.8v with a step down that is pictured.

Tried some 80m and 40m earlier, but it's pretty horrible tonight.  I could hear a few folks, but no response to CQ so far.

<2018_03_17 20.25.55.jpg>

73
Rob
AG5OV

BitX40 case from The Home Depot...

Steve
 

I picked up this Husky clear acrylic "waterproof" case from THD back when I first got my '40.  $12.  I kind of like the see-through look.  I think with some rearranging I could get a small LiPo battery in there....The Sharpie pen case made a dandy mic body.  Could probably squeeze a bit of wire in there for a dipole or End Fed, then I'd truly have a shack in a box.  The little speaker in there is practically useless.  Probably leave it as-is, and move on the the uBitx.  Aloha, Steve.  
ps- made a contact on a (questionably-accurate) indicated 3.5W to Alaska.  Stoked!

I've gone digital with the BitX-40!

John P
 

Just got the BitX-40 working on FT-8 2 days ago! So far, I've worked 12 states (AL, AZ, GA, IL, MI, MS, NC, NJ, OH, VA, WA, WV) and Ontario. Not bad for only 5 watts!

I've seen W1LY on FT-8, but have yet to work him. Anyone else on here using FT-8 on the BitX? Look for me or let me know you're on and I'll look for you.

In a couple of days, I'll publish the VOX operated interface I'm using between the PC and the rig.
--
John - WA2FZW

Re: I've gone digital with the BitX-40!

 

That's pretty impressive John ! What is your antenna setup?

Re: How To Do a Search for Specific Message

Jerry Gaffke
 

I first select a specific message at random, your message will do:
    https://groups.io/g/BITX20/message/44837
Then edit that number (44837) to whatever message number I want to see.

Jerry, KE7ER


On Sat, Mar 17, 2018 at 06:46 pm, Guy N7BIR wrote:
I think I’m getting dumber the older I get but I can’t figure out how to search for specific messages in our Group List. Putting the pound sign in front doesn’t seem to work, and just putting the message number in doesn’t help. Any Search gurus out there?

Re: RD16HHF1 power curve flattening...some

Glenn
 

Nik,

I have done  a bit more testing now using an RD16HHF1 pair in the final although expediency meant i used the final section of the G6ALU 20W pa design.

I also found oscillation problem (about 110MHz). It seemed to be coming from the 1st and maybe the 2nd stages of the MPSH10 stages.  I removed the 330pF from the 1st stage and it's now pretty tame.  BUT, the response is nothing like as flat as I had hoped it would be. I have no feedback on the RD16HHF1 stages as yet.  I don't run the drive control flat output though as looking at the output on a scope, it's severely flat topping with this level. Around 16-17W is about max. level.

 But I did plot the response of an original complete G6ALU amp and it falls away badly at the 80M end of the HF bands. In the PicaStar where this pa is used, it's no problem as Star has software drive control on each band since its DSP based.

Not much time to investigate further at this stage.

glenn
vk3pe


MSG:
Well, i have dont my mods and powered up. Results are mixed:
Here are the mods.
RD16 replace IRF510.
New output transformer 1:4 BN43-3321 with a 330pf cap on input.
feed back resistors. from 22ohm to 1 K ohm
piggy backed R87 and R88 with 220pf capacitor.
RV1 full drive.

So results.
80M - 20W + ( blew my 2 Amp fuse)
40M - 18W - Seems stable.
30M - 17W BUT I get BAD feedback/ oscillation by just going PPT with no voice. The watt meter goes up to 18W!
20M - 15W  -  Same feedback issue
15M -  Same feedback issue.
10M -  Same feedback issue.

I have been thinking ans looking at other RD16 schematics, in alot of cases they dont use the feedback on the finals?
Also could this issue be cuase in the driver stage?

THanks guys, I am in over my head here....

73
10M - Same feedback issue

Re: adrino

David Wilcox
 

Keep us posted on your progress and the value.  I ordered one too after the first email.

Dave K8WPE

On Mar 17, 2018, at 8:41 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

Which starter kit?

Having recommended this kit, figured I might as well get one.  Arrived today:
        https://www.amazon.com/Elegoo-Project-Starter-Arduino-Mega2560/dp/B01GEEWIPA

Haven't played with it yet, but have inspected the box contents.
Impressive!  It all looks quite useful.
You'd be hard pressed to buy all the stuff they give you for the same $30.

The next even mildly interested young relative or acquaintance of mine may well get one.
But not this one, I think I'll keep it.

Jerry

On Sat, Mar 17, 2018 at 04:58 pm, @bobbybailey wrote:
today I got the book and the starter kit, so far I have learned to save, compile and edit the blink sketch.

Re: BitX40 case from The Home Depot...

Jacob Farnes
 

What is the panel material you are using and how did you mount the mounting screws?

I am looking to do similar to some ammo cans and the Apache cases. I've been having a rough time getting something sturdier than cookie tins. Apparently I'm a little too rough for them.

Re: uBitx Component list

Noel-ZR6DX
 

HI Alan,  email me and I will send you a BOM file in Excel format . I will also need to email you the circuit diagram as my component annotation is not the same as the original circuit from Ashhar.   I run a youth club called Hammies ZS6ZU and I have designed a PCB for THT components. We have populated two PCB's and are busy with the testing phase. The idea here, is to get the kids to build their own transceiver using though hole components.

73
Noel de ZR6DX

Re: I've gone digital with the BitX-40!

John P
 

On Sat, Mar 17, 2018 at 10:33 pm, Don N9GOD wrote:
What is your antenna setup?
The antenna is a 2 turn - 4 foot magnetic loop in the attic. The documentation and software for the controller is in the "Files" section here.
 
--
John - WA2FZW

Re: Received my uBitx!

W8SWG
 

Per suggestion here I did email hfsigs.  They informed me today that they have shipped united with order dates of 1/24.  Could it be that John meant that he placed his order on 1/17 rather than 2/17? 

Re: adrino

Terry Morris
 

That's the one I ordered.


Terry - KB8AMZ
Brimfield Twp, OH
Linux User#412308, Ubuntu User #34905
OSs: LM18.1, Ubuntu 16.04, Puppy tahrpup64, Raspbian
Orgs: PCL70-FOP, NTHS, ALUG, ARRL, PCARS#78, NAQCC#6668, NO-QRP-C, QRP-ARCI#8855
I chair the PCARS CW/QRP SIG and Linux for Hams SIG, second and fifth Tuesday

my computer, my opinion

On Sat, Mar 17, 2018 at 10:04 PM, <wb7dmx@...> wrote:
super starter kit r3


Re: Junkyard uBITX #ubitx

Terry Morris
 

Nice kit.


Terry - KB8AMZ
Brimfield Twp, OH
Linux User#412308, Ubuntu User #34905
OSs: LM18.1, Ubuntu 16.04, Puppy tahrpup64, Raspbian
Orgs: PCL70-FOP, NTHS, ALUG, ARRL, PCARS#78, NAQCC#6668, NO-QRP-C, QRP-ARCI#8855
I chair the PCARS CW/QRP SIG and Linux for Hams SIG, second and fifth Tuesday

my computer, my opinion

On Sat, Mar 17, 2018 at 11:10 PM, Gordon Gibby <ggibby@...> wrote:
Rob:  looks beautimus!!


On Mar 17, 2018, at 22:07, Rob Snow <rsnow@...> wrote:

I've seen a ton of beautiful uBITX builds, I thought I'd add my junkyard build that I just completed earlier for the other end of the spectrum.  My wife was going to throw the tin away, so I grabbed it.  Some drilling and snips later and it is alive!  I've got the WX audio chip, so I installed a 8ohm + 8ohm speaker and am running it at 12.0v from 13.8v with a step down that is pictured.

Tried some 80m and 40m earlier, but it's pretty horrible tonight.  I could hear a few folks, but no response to CQ so far.

<2018_03_17 20.25.55.jpg>

73
Rob
AG5OV


Re: Voltage/Waveform chart?

Paul Galburt - K2AYZ
 

I remember having a Wen soldering gun around 1954 as a Weller was too expensive for my 13 year old budget.

Re: Finally finished boxing up my uBitX #ubitx

John McClun
 

Since it's an SMD 2822 you might want to get a NJM2073M-TE1 which is the SMD compatable.
--
John
NQ3RP

Re: adrino

Fred Buecker
 

I have had some great experiences with the RexQualis kits. My daughter and I actually found some errors in the docs and they sent us an upgraded kit as a thank you for reporting the errors.

It was an unexpected, but welcome, gesture.

-Fred

KC3HMS

On Mar 18, 2018 10:00 AM, "Terry Morris" <terry.kb8amz@...> wrote:
That's the one I ordered.


Terry - KB8AMZ
Brimfield Twp, OH
Linux User#412308, Ubuntu User #34905
OSs: LM18.1, Ubuntu 16.04, Puppy tahrpup64, Raspbian
Orgs: PCL70-FOP, NTHS, ALUG, ARRL, PCARS#78, NAQCC#6668, NO-QRP-C, QRP-ARCI#8855
I chair the PCARS CW/QRP SIG and Linux for Hams SIG, second and fifth Tuesday

my computer, my opinion

On Sat, Mar 17, 2018 at 10:04 PM, <wb7dmx@...> wrote:
super starter kit r3