Date   
Re: BITX-40 just built it #bitx40

Jens / DH1AKY
 

Just uploaded my front-plate design into the ordering tool. Around 33 Euro if you choose Aluminium. Shoud be around $ 33. Don't know the prices in the U.S. but that the price range here in Germany.
73, Jens / DH1AKY

Re: BITX-40 just built it #bitx40

Arvo W0VRA
 

Roughly what's the cost of such a panel?

Re: BITX-40 just built it #bitx40

Dennis Zabawa
 

I have used Front Panel Designer to layout panels that I have had produced and for others that I printed and laminated.  A very easy to use tool.

Re: BITX-40 just built it #bitx40

Jens / DH1AKY
 

Here are the two files. Feel free to use/modify/improve it. 

73, Jens / DH1AKY

Re: Creating Gerber files for pcb construction

Gordon Gibby <ggibby@...>
 

​Thanks to all your suggestions I made two trial orders:

pcbway.com

jlcpcb.com 


About last friday night/saturday.

The first set is supposed to arrive sometime tomorrow (wednesday)

and the other set on Thursday.   amazing.


Fingers crossed that I did this correctly!!!


Showed this project to my youngest son (working as a new auto mechanic) and he was motivated to get out the christmas arduino kit I gave him and immediately started building LED circuits....astonishing my wife and me....may help him out in life.





From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby <ggibby@...>
Sent: Sunday, January 21, 2018 12:09 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction
 

Thanks for yet another great suggestion.


I have now created a "flying jumpers" breadboard version using a couple of different resistive bridge designs --- the K6BEZ design driven by the Si5351 directly  didn't produce enough voltage to make the reverse measurement accurate and I gave up after several hours on that.   Would need to add an amplification stage I believe...   The easy swr indicator kit from http://www.qrpkits.com/ezseries.html#ezswr  (no LED, just take the rectified voltage and run into an op amp with a gain of about 6)  produced a voltage that seemed to work.   My circuit is sorta haywire (with egloo jumpers everywhere) and the pcb version would be FAR MORE STABLE but I'm able to measure  shorts, 25 ohm, 50 ohm, 100 ohm, 220 ohm and open circuit and get  "sorta close SWR" measurements at frequencies up to maybe 30 MHz.   There is so much haywiredness to the breadboard that I can't make any better observations at the moment.   The PCB should be a ton more mechanically stable.  Earlier today I put it on a real antenna and it did find the resonance.   


A friend is working on the "single meter" SWR version using a toroidial swr measurement head (which I also have built and should also work).   The goal there is to emulate the $129 LDG big meter display of SWR.....    The pcb that I cranked out (and now being built in China, fingers crossed!) should work with both.   (2 different inputs).   


You folks are a lot brighter at this stuff than I am but it has been a ton of fun just getting this much to work!  I think this is going to be a great building project for our ARES group.  







From: BITX20@groups.io <BITX20@groups.io> on behalf of William R Maxwell <wrmaxwell@...>
Sent: Saturday, January 20, 2018 5:02 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction
 

Another to consider is www.jlcpcb.com. I have just received 10 boards for a mere $2 total, including DHL shipping.  Note the there is a sixe limit of 100mmx100mm, and two layers, green solder resist and 1.6mm material.

This offer I think is limited to your initial order. A subsequent set of 3 boards, 10 copies each, cost me $29, including shipping.

Bill, VK7MX


On 21/01/2018 12:38 AM, Gordon Gibby wrote:
Wow!!! Thank you for that wonderful tip.

Sent from my iPhone

On Jan 20, 2018, at 06:51, Kerr Smith <kerrsmithusa@...> wrote:

Have you looked at PCB Shopper? You just set the size of your PCB and how any boards you require and it will list all the main PCB fabrication sites and how much it will cost:

https://pcbshopper.com

For my latest PCBs I tried AllPCB and was extremely pleased with the results, they had an offer on at the time so for $5 I got 7 boards on one order and for my second $5 order I got 17 boards (if your boards are small they seem to add in extra to your order) - they were all shipped using TNT and arrived in just 5 days. At the current time the total cost is $12 for 5 boards up to 35mm x 35mm with free TNT shipping:

http://www.allpcb.com

The other site I would recommend is OSHPark:

https://oshpark.com

They are the ones who do the purple PCBs which look really great and also pretty cheap, only a few dollars (around $9.50) for three
35mm x 35mm boards with shipping included.

I am so pleased that the price for creating PCBs yourself is now this low, up until now I have been carefully making my own by etching them but now I can get them in a few days if I need them fast or a couple of weeks if I don't mind waiting. There are so many different fabrication sites there is always going to be a great deal to be had if you shop around a bit, the
PCB Shopper site I mentioned above is really great for this.

Re: uBitX PA Drivers

M Garza <mgarza896@...>
 

Looking at different schematics, the resistor is usually about 12 ohms.  I would think 11 or even 10 ohms would be fine.  I have attached the part data sheet.  I have not tried this, so YMMV.  It was just an idea.  If you have any old 10/11 meter SSB radios, you might be able to salvage a couple to try with.

Let us know, if you do try this.

Marco - KG5PRT 

On Jan 23, 2018 7:17 AM, "K9HZ" <bill@...> wrote:

Those are excellent low power RF amplifiers… will work above the 432 band…

 

 

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com

Like us on Facebook! facebook icon

 

 

email:  bill@...

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mike
Sent: Tuesday, January 23, 2018 3:56 AM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitX PA Drivers

 

On Mon, Jan 22, 2018 at 09:00 pm, M Garza wrote:

2SC1973

Re: BITX-40 just built it #bitx40

Vic WA4THR
 

Thanks for the links, Jens, both came up in English here and I grabbed that software. I'd also be interested in your design file as that could save some effort here.

73, =Vic=

Re: BITX-40 just built it #bitx40

Jens / DH1AKY
 

If someone is interested I'll publish the design files here.

73, Jens/DH1AKY

Re: BITX-40 just built it #bitx40

Jens / DH1AKY
 

Sorry, there is also an English version available:

https://www.frontpanelexpress.com/downloads/front_panel_designer/?no_cache=1

Re: BITX-40 just built it #bitx40

Jens / DH1AKY
 

Hi Vic,

the software is from a German Company named Schaeffer AG manufacturing front-panels of aluminium. But you can use it also and print it on plain paper.
https://www.schaeffer-ag.de/downloads/frontplatten_designer/
After printing I cut the window for the display into the paper. Then laminated it one-side only.

I've read about such a method here on the net. It was not my idea. But I tried this and found it managable. The result looks fine if you dont glue that on the PCB material.

On the backside I've tried to glue the paper side on the PCB material. The glue was sucked from the paper and the result looks awfully.

73 Jens/DH1AKY

Re: I2C display up and running on my uBITX

Graham W
 

Using the I2C that frees up a few digital lines that could be used to switch other filters. 
Would it be possible to point to the code you used for this please ? 

Re: Mic Preamp install, bias resistors #ubitx

Arvo W0VRA
 

Oops, I meant C5.

Re: Mic Preamp install, bias resistors #ubitx

Arvo W0VRA
 

Cool, Nick!  I've got a couple of SSM2167 boards, too.

Can you draw up a schematic?  I think I follow what you did, but I want to make sure.

I plan to replace both R1 and R2 with pots.  I'm also going to try to use C3 as part of a HPF by putting another pot between pin 6 and ground.  The goal is to keep everything <300 Hz out of the signal chain.

Re: Ubitx case

Jeffrey Benedict
 

Here's a link to the "Cases and Enclosures" on US eBay:

https://www.ebay.com/b/Electrical-Boxes-Enclosures/42886/bn_7717992

 

Go nuts.

Re: uBitX PA Drivers

K9HZ <bill@...>
 

Those are excellent low power RF amplifiers… will work above the 432 band…

 

 

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com

Like us on Facebook! facebook icon

 

 

email:  bill@...

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mike
Sent: Tuesday, January 23, 2018 3:56 AM
To: BITX20@groups.io
Subject: Re: [BITX20] uBitX PA Drivers

 

On Mon, Jan 22, 2018 at 09:00 pm, M Garza wrote:

2SC1973

Re: Mic Preamp install, bias resistors #ubitx

chris gress <Chrisg0wfh@...>
 

Got 3x max4466 mic amps with mic for £1,98 each just need my ubix and case chris

On 23 Jan 2018 01:44, <nickpullen@...> wrote:
Hi.
I have completed this as per above. Seems to work.
I have also replaced the default R1 15K resistor with a 50k pot for easy adjustment.
Did some testing last night, But I really need to get a setup where I can hear myself.

Ill try some more QSO test tonight.

73 VK4PLN


Re: Mica Cap replacements for WA2EBY Filter?

MVS Sarma
 

After long soaking, we need to request the paper  slowpealing by pressure and labor.
 All these could be avoided by the Yellow papers with silicon coating solde by ebay, aliexpress  very cheao and also on amazon.com.
after transfer wait for pcb cool to 50%down. just peel off . I have been comfortably using this.
 
Though costly American made Press and peel papers with starch coating , just fload off few seconds after dip in wrm water.
 But only few could afford.
I also admire their green TRF coating foil that protects pcb from etchant attack at unwanted   microscopic holes . I used to get dam nice resilts from the   P$P papers.


Regards
MVS Sarma
 

On Tue, Jan 23, 2018 at 3:49 PM, Lawrence Galea <9h1avlaw@...> wrote:
Hi Mark
I've used photo paper with no problems at all.
You have to leave the pcb in the water to soak quite well before trying to remove the paper backing.
Regards
Lawrence


On Tue, Jan 23, 2018 at 5:38 AM, Mark Baldridge <marktbaldridge@...> wrote:
Lawrence, I've tried a bunch of different paper. Either the toner would stick to the paper and not transfer (plenty of heat and pressure here) or the paper would stick to the copper and just tear when I'd try to pull it off. That stuff I linked to was what it took for me. Although I'd certainly like to not have to buy something else.

On Mon, Jan 22, 2018 at 3:44 AM, Lawrence Galea <9h1avlaw@...> wrote:
You can use glossy photo paper and other glossy paper.
When you use the clothes iron just press it on the paper.
If it does not cover the whole pcb lift it up and place place it on the part that was not covered.
If you move it as if you are pressing clothes you may smudge the traces.
If when you remove the paper with water you see that part of the traces did not stick (because the toner will still be attached to the paper) just press it again with the iron.
You have to strike a balance between having good toner transfer and smudging thin lines because if you leave it too long the toner will spread which also results in a thinner coating the etchant eating away part of the trace.
Regards
Lawrence

On Sun, Jan 21, 2018 at 10:33 PM, Mark Baldridge <marktbaldridge@...> wrote:
I used this paper. https://www.amazon.com/Circuit-Board-Thermal-Transfer-Special/dp/B01CGRL2G0/ 

You print the image in reverse to scale on that stuff, iron it to the copper clad, and then soak in ferric chloride. Getting a good etching mask is where all the trickiness is. I think lots of iron pressure and heat really help.

On Sat, Jan 20, 2018 at 8:03 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
The date etching shows how good the etch was. What did you end up using, from method to etchant?

Jack, W8TEE



From: Mark Baldridge <marktbaldridge@...>
To: BITX20@groups.io
Sent: Saturday, January 20, 2018 1:21 AM
Subject: Re: [BITX20] Mica Cap replacements for WA2EBY Filter?

I just etched the filter board! Not a perfect toner transfer, but not too bad. The traces are solid and pass the beep test. :)



On Fri, Jan 19, 2018 at 10:18 PM, Mvs Sarma <mvssarma@...> wrote:
Jstin, If you make PCB, it could have facity for both throhiole for silver mca and for smd too.

Regards
MVS Sarma
 

On Sat, Jan 20, 2018 at 3:04 AM, Mark Baldridge <marktbaldridge@...> wrote:
This will be great. I plan to order the SMT parts as they are cheap, and then "upgrade" to the mica caps if I need to.

On Thu, Jan 18, 2018 at 9:15 AM, <freefuel@...> wrote:
Hi Mark, I have started to build up two filter boards for this amp, one with mica caps I was lucky enough to find at a local surplus outlet, and another with SMT parts. I'll post the results as soon as I test them. 

-Justin N2TOH 



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Re: BITX-40 just built it #bitx40

Vic WA4THR
 

Very nice. Can you tell us more about the laminated paper and front plate design software you used for the front panel? I have the same case on a slow boat coming "someday".

=Vic=

Re: help

Perrouin pierre andre
 

Brian

Many thanks for advice,work nicely.

73 f6fjh

-----Message d'origine-----
De : BITX20@groups.io [mailto:BITX20@groups.io] De la part de B C
Envoyé : mardi 23 janvier 2018 04:53
À : BITX20@groups.io
Objet : Re: [BITX20] help

yep..been there done that...you need to use the zipped library...you have some big html version of the file..I will send you the zip file then use the arduino IDE to add it to your project.
Brian K9WIS

---- Perrouin pierre andre <pa.perrouin@...> wrote:
Hello



Why when i want upload in my arduino the Sketch Raduino_v1.27.7 for BITX40 –
i can’t compile ,i have error stray ‘#’ in program.



Thanks for help.



Pierre-André

F6FJH






Re: Mica Cap replacements for WA2EBY Filter?

Lawrence Galea
 

Hi Mark
I've used photo paper with no problems at all.
You have to leave the pcb in the water to soak quite well before trying to remove the paper backing.
Regards
Lawrence


On Tue, Jan 23, 2018 at 5:38 AM, Mark Baldridge <marktbaldridge@...> wrote:
Lawrence, I've tried a bunch of different paper. Either the toner would stick to the paper and not transfer (plenty of heat and pressure here) or the paper would stick to the copper and just tear when I'd try to pull it off. That stuff I linked to was what it took for me. Although I'd certainly like to not have to buy something else.

On Mon, Jan 22, 2018 at 3:44 AM, Lawrence Galea <9h1avlaw@...> wrote:
You can use glossy photo paper and other glossy paper.
When you use the clothes iron just press it on the paper.
If it does not cover the whole pcb lift it up and place place it on the part that was not covered.
If you move it as if you are pressing clothes you may smudge the traces.
If when you remove the paper with water you see that part of the traces did not stick (because the toner will still be attached to the paper) just press it again with the iron.
You have to strike a balance between having good toner transfer and smudging thin lines because if you leave it too long the toner will spread which also results in a thinner coating the etchant eating away part of the trace.
Regards
Lawrence

On Sun, Jan 21, 2018 at 10:33 PM, Mark Baldridge <marktbaldridge@...> wrote:
I used this paper. https://www.amazon.com/Circuit-Board-Thermal-Transfer-Special/dp/B01CGRL2G0/ 

You print the image in reverse to scale on that stuff, iron it to the copper clad, and then soak in ferric chloride. Getting a good etching mask is where all the trickiness is. I think lots of iron pressure and heat really help.

On Sat, Jan 20, 2018 at 8:03 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
The date etching shows how good the etch was. What did you end up using, from method to etchant?

Jack, W8TEE



From: Mark Baldridge <marktbaldridge@...>
To: BITX20@groups.io
Sent: Saturday, January 20, 2018 1:21 AM
Subject: Re: [BITX20] Mica Cap replacements for WA2EBY Filter?

I just etched the filter board! Not a perfect toner transfer, but not too bad. The traces are solid and pass the beep test. :)



On Fri, Jan 19, 2018 at 10:18 PM, Mvs Sarma <mvssarma@...> wrote:
Jstin, If you make PCB, it could have facity for both throhiole for silver mca and for smd too.

Regards
MVS Sarma
 

On Sat, Jan 20, 2018 at 3:04 AM, Mark Baldridge <marktbaldridge@...> wrote:
This will be great. I plan to order the SMT parts as they are cheap, and then "upgrade" to the mica caps if I need to.

On Thu, Jan 18, 2018 at 9:15 AM, <freefuel@...> wrote:
Hi Mark, I have started to build up two filter boards for this amp, one with mica caps I was lucky enough to find at a local surplus outlet, and another with SMT parts. I'll post the results as soon as I test them. 

-Justin N2TOH 



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Virus-free. www.avast.com




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