Date   
Re: getting the uBitx on FT8

K5ESS
 

FWIW here’s my solution.  See attached.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Nick Tile
Sent: Wednesday, July 17, 2019 9:28 AM
To: BITX20@groups.io
Subject: [BITX20] getting the uBitx on FT8

 

Hi Guys,I was planning to put my uBitx on FT8 - no problem with an interface for the audio, but puzzled as to how best to drive the PTT. I've installed Ian's Firmware which seems to be CAT compliant but I can't see if it drives the PTT or if I need to install a USB - Serial interface. Interested to know how you've done it ? 

Nick

Re: getting the uBitx on FT8

Skip Davis
 

Thanks Mike for the interface solution PDF you put together it’s very useful. I’ve been meaning to build one again I just needed a schematic. I built a similar one for packet I just can’t recall what I did with it or what I did with the schematic.

Skip Davis, NC9O 

On Jul 17, 2019, at 22:16, K5ESS via Groups.Io <k5ess.nothdurft@...> wrote:

FWIW here’s my solution.  See attached.

Mike

K5ESS

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Nick Tile
Sent: Wednesday, July 17, 2019 9:28 AM
To: BITX20@groups.io
Subject: [BITX20] getting the uBitx on FT8

 

Hi Guys,I was planning to put my uBitx on FT8 - no problem with an interface for the audio, but puzzled as to how best to drive the PTT. I've installed Ian's Firmware which seems to be CAT compliant but I can't see if it drives the PTT or if I need to install a USB - Serial interface. Interested to know how you've done it ? 

Nick

<K5ESS Easy Digi.pdf>

Re: Items For Sale uBITX V4 new -plus #filters #ubitx

Mark Hatch
 

I will take 1 of each if that offer is available.

Paypal address?

73
Mark
Aj6CU

Re: getting the uBitx on FT8

Mark Hatch
 

Skip,

I purchased a cheap usb hub and sound card from ebay (total $$$ < $10 delivered). Installed them within the ubitx case and working fine on ft8.

Tricks:
1. use KD8CEC CAT control for transmitter (ptt)
2. Added a dpdt switch on the wire to the speaker. When it is in "ft8" mode, the sound goes into the mic of the usb sound card. when it is in "normal" mode, sound goes to the speaker
3. Wired the speaker of the sound card into the mic
4. Used shielded cables for input/output to sound card
5. Made sure that the internal hub the UBITX *was not* connected to another hub. To get it to work, had to directly connect the USB cable out of the UBITX to my NUC.
6. Direct connect to com port on the windows machine. Could *not* reliably use omnirig.
7. had to set to USB mode in WJSTx
8. Used none in WJSTX for Rig vs Fake It option.

That should get you online. (Don't forget that volume controls the receive level of wjstx)

73
mark
AJ6CU

Re: getting the uBitx on FT8

Mark Hatch
 

And also cut the 5v wire on the USB or your Raduino will always be powered by your computer.

Mark

Re: getting the uBitx on FT8

Nick Tile
 

Lots of useful info - many thanks to all. Hopefully meet you all on FT8 shortly !!

73s, N

Easy desoldering of relays (& other multi-pin devices)

Gerry Kavanagh
 

I recently changed out the relays on my v0.3 uBiTX, and since for whatever reason I cannot get wick to remove all the solder, no matter what iron I use and how much flux, I thought I might try another method. There are a number of low-temperature solder products, the most famous/common, being ChipQuik. They are basically an alloy that includes indium or gallium which when added to a solder joint, drastically lowers the melting point. What this means is that you can melt the solder at each leg of a device, and by the time you have gotten to the last leg, the first will still be molten, which means the device just pulls free. The risk to the device and to the board is greatly reduced.
If anyone is having difficulty, or is apprehensive about replacing the relays, this may be a good solution.
/ Gerry

Re: Easy desoldering of relays (& other multi-pin devices)

Michael Walker
 

Hi Gerry

Find some Chipquik.  It makes desoldering a breeze.  I've even pulled multipin CPU's from boards with it.


Mike va3mw


On Thu, Jul 18, 2019 at 4:47 AM gerrykav via Groups.Io <gerrykav=yahoo.co.uk@groups.io> wrote:
I recently changed out the relays on my v0.3 uBiTX, and since for whatever reason I cannot get wick to remove all the solder, no matter what iron I use and how much flux, I thought I might try another method. There are a number of low-temperature solder products, the most famous/common, being ChipQuik. They are basically an alloy that includes indium or gallium which when added to a solder joint, drastically lowers the melting point. What this means is that you can melt the solder at each leg of a device, and by the time you have gotten to the last leg, the first will still be molten, which means the device just pulls free. The risk to the device and to the board is greatly reduced.
If anyone is having difficulty, or is apprehensive about replacing the relays, this may be a good solution.
/ Gerry

Re: Easy desoldering of relays (& other multi-pin devices)

Joe Puma
 

I good suction desolder tool got most of the solder off for me on the relay. It removed it so well I was able to remove the relays with a wiggle and they broke free. 

Joe
Kd2nfc 


On Jul 18, 2019, at 8:28 AM, Michael Walker <va3mw@...> wrote:

Hi Gerry

Find some Chipquik.  It makes desoldering a breeze.  I've even pulled multipin CPU's from boards with it.


Mike va3mw


On Thu, Jul 18, 2019 at 4:47 AM gerrykav via Groups.Io <gerrykav=yahoo.co.uk@groups.io> wrote:
I recently changed out the relays on my v0.3 uBiTX, and since for whatever reason I cannot get wick to remove all the solder, no matter what iron I use and how much flux, I thought I might try another method. There are a number of low-temperature solder products, the most famous/common, being ChipQuik. They are basically an alloy that includes indium or gallium which when added to a solder joint, drastically lowers the melting point. What this means is that you can melt the solder at each leg of a device, and by the time you have gotten to the last leg, the first will still be molten, which means the device just pulls free. The risk to the device and to the board is greatly reduced.
If anyone is having difficulty, or is apprehensive about replacing the relays, this may be a good solution.
/ Gerry

Re: getting the uBitx on FT8

Don - KM4UDX
 

Mark — I used your procedures as well. Works grand. Question — given we have a cheap USB sound card dongle, can I remove the audio isolation txfmrs?

Re: Items For Sale uBITX V4 new -plus #filters #ubitx

Andrea KC0LKV
 

Would sale the case alone?

Expanding the Bitx Experience

KN2Z <mwcarpe@...>
 

In an effort to get the Bitx experience to as many as possible, a group has been created on the MeWe social media platform. 
As far as I can tell, this is the only one on MeWe so far.
All here are invited to join.
https://mewe.com/join/everythingbitx

Re: RX BCI filters

Curt
 

David

Few of us can afford or choose to buy a spectrum analyzer. Some are having success with a SDR in measuring spurs, and I want to explore this route.

We can trust the results of the community. The circuit board designed by Gordon Gibby has been found to he highly effective in fixing harmonics, curing the major source of cw spurious. Kitting this could bring business to someone's store. Part 2 to cure mixing spurious has proven more difficult. A second xtal filter at 45 MHz was troublesome in my rig, but perhaps when I try shielded inductors might work better. 

Yes others having fun with putting on the blinders. My rig is dreadful on 12m, maybe not as bad on the other bands.

Curt

Re: Easy desoldering of relays (& other multi-pin devices)

David
 

The method fo removing solder through hole components; where you can access the component fully,
per my days in medical instrumentation, is to use fine wire cutters and cut the leads as close to the body of
The component as possible. Then remove the component. Next take a small pair of needle nose pliers grab the lead and heat the pad using a tip with a drop of solder on it. When molten pull the lead out. Then reapply heat and use a solder sucker to clear the pad and through hole. This reduces the chances of damaging the feed through hole.

I am not a big fan of solder wick as it can often lead to overheating the pad and damaging it.

Also if you are having trouble getting a small piece of solder off a pad or feed through. Re-apply solder to the whole pad and feed through and then try the solder sucker again.

Re: Easy desoldering of relays (& other multi-pin devices)

Michael Walker
 

This is why I recommend Chipquik.

It is a solder with a very high freezing temperature.  You mix it in with the current connection with  a soldering iron and then it stays soft for about 10 seconds giving you time to remove the part.

I had to remove a very large transformer from a HF amp that had 2 circuit boards joined together that was about 3cm long.  Without Chipquik, it would have been near impossible.  

I'm blown away how easy it is and how much safer it is to your board than the traditional methods of solder suckers, vacuum stations and even solder wick.  

You might want to watch their video.  This is new school and much newer technology.

Mike va3mw

On Fri, Jul 19, 2019 at 2:09 AM David <dokrent@...> wrote:
The method fo removing solder through hole components; where you can access the component fully,
per my days in medical instrumentation, is to use fine wire cutters and cut the  leads as close to the body of
The component as possible. Then remove the component. Next take a small pair of needle nose pliers grab the lead and heat the pad using a tip with a drop of solder on it. When molten pull the lead out. Then reapply heat and use a solder sucker to clear the pad and through hole. This reduces the chances of damaging the feed through hole.

I am not a big fan of solder wick as it can often lead to overheating the pad and damaging it.

Also if you are having trouble getting a small piece of solder off a pad or feed through. Re-apply solder to the whole pad and feed through and then try the solder sucker again.



Re: Expanding the Bitx Experience

Nigel
 

Greetings from sunny South Africa :-)

Tried accepting invitation, completed requested details, submitted confirmation code sent via SMS and nothing...

Will try again another day.

Good initiative but unless 'service' works then not going to get far!

73

Nigel ZS6RN ex G8DEV

Re: Easy desoldering of relays (& other multi-pin devices)

Don--AE4DW
 

Thanks for the recommendation, I had never heard of Chipquik until i read this thread, looks like a good tool for the tool box for those desoldering jobs involving multiple pins past 2 or 3.

I usually manage ok with solder wick and a Haako 808 desoldering gun, but will definitely pick some up.

Re: getting the uBitx on FT8

Mark Hatch
 

Don,

I did *not* use any isolation transformers. And as far as I can tell, there has been no ill effects. I also saw on other threads, where others did not include the transformers and seemed to be operational.

However, with that said, if you have everything together, why not keep them? I really don't know enough technically on this point to provide any guidance. I remember my 8th grade math teacher beating into my head that just because you found one example of where a proof was correct, that doesn't mean it is a proof. :-)

73
Mark
AJ6CU

Re: Items For Sale uBITX V4 new -plus #filters #ubitx

Mark Hatch
 

I was offline yesterday. Did these items end up being sold?

73
Mark

Re: RX BCI filters

Mark Hatch
 

In regards to a spectrum analyzer....

The SDRPLAY has some add-on software that provides a basic spectrum analyzer. I used it to peak at my spurs/harmonics before and after. Could see the difference the changes made (relays and inductor). Again, wouldn't use this for absolute, but I could measure the db of spurs and harmonics and see that I was compliant except on the 10m band.  And with a noise source, you can look at the impact of filters too. Again, this will not replace a $2k+ spectrum analyzer, but I already had a SDRPLAY that I used with my IC-7300 as a spectrum display....

73
Mark