Topics

Toroids Loose on Arrival

Ryan Flowers
 

Howdy all,


I've just received #697 in the mail today, and I sure am excited to get on the air! I did notice a couple of toroids were loose on it, and before I power it up and start playing with it, I want to be sure that they just came unglued and need to be glued back down. Here are pictures of what I see:


L2: http://puu.sh/syTg7/309a86ba3e.jpg


L4:  http://puu.sh/syTiP/c184375c22.jpg (at least, I think this is L4 according to the schematic- it's not visible on the board)


Both of these were oriented incorrectly as seen here:


http://puu.sh/syRFW/b9c675e674.jpg


I straightened them out, but am not sure what to glue them down with. Any assistance would be most appreciated. Thanks!


 

As long as none of the wires are broken on the toroids, all you need to do is straighten them. They pretty much all came with toroids crunched, mine did. For glue, I use hot glue, but you can use silicon or contact cement or anything really. I used to use clear finger nail polish. Don't glue L4 down until you get it on frequency by compressing the turns or loosening them until you get the band coverage you want. You should be on the air soon.

Joel Caulkins
KB6QVI

On Nov 29, 2016, at 4:18 PM, geocrasher@... [BITX20] <BITX20@...> wrote:

 

Howdy all,


I've just received #697 in the mail today, and I sure am excited to get on the air! I did notice a couple of toroids were loose on it, and before I power it up and start playing with it, I want to be sure that they just came unglued and need to be glued back down. Here are pictures of what I see:


L2: http://puu.sh/syTg7/309a86ba3e.jpg


L4:  http://puu.sh/syTiP/c184375c22.jpg (at least, I think this is L4 according to the schematic- it's not visible on the board)


Both of these were oriented incorrectly as seen here:


http://puu.sh/syRFW/b9c675e674.jpg


I straightened them out, but am not sure what to glue them down with. Any assistance would be most appreciated. Thanks!


Ryan Flowers
 

Hi Joel,

Thanks a lot for that. I've seen that others have had issues, wasn't sure though. I'll try the nail polish trick since I don't have anything else handy. Looks like I have an antenna to erect and some soldering to do!

Thanks,

Ryan Flowers
KC7RYS

ohwenzelph
 

yep, that's pretty much what mine looked like, a bit loose and a bit scramble wound
jerry aa1of/6

Patrick Pugh Sawian
 

Loose toroids.? You're scaring me. Ordered mine yesterday. What's the lead time usually?

Pat
Vu3pat

Sandeep Lohia
 

"patrick_pugh2000@... [BITX20]" <BITX20@...> wrote:
>
> Loose toroids.? You're scaring me. Ordered mine yesterday. What's the lead time usually?
>
> Pat
> Vu3pat
>

Not big issue,
Can be glued wth a drop of aeraldite in between...

Arv Evans
 


Pat   U3PAT

From his pictures a couple of the toroids had bent over slightly and one in the
bandpass filter was turned about 75 degrees.  The toroids are not glued in place
in this kit, leaving possibility for users to make modifications without having to
remove or break glue.  It is a feature, not a problem.  If after receiving your new
BITX-40 v3 you want to secure the toroids, this can be done using hot-melt glue,
melted wax, or model airplane glue.  Other adhesives might also work.

I would suggest not securing the VFO inductor until you are sure you have it
adjusted to cover the tuning range that you desire.  It may be necessary to remove
or add one turn on this inductor.  This situation arises because the 40 meter
band is slightly different in different ITU regions.

Arv  K7HKL
_._


On Wed, Nov 30, 2016 at 11:12 PM, patrick_pugh2000@... [BITX20] <BITX20@...> wrote:
 

Loose toroids.? You're scaring me. Ordered mine yesterday. What's the lead time usually?

Pat
Vu3pat


Sandeep Lohia
 

Friends, just don't use Cyanoacrylate based ( fevi-quick ) adhesive.
It's vapour or contact can make nearby metal catch very bad rust, oxide... ( including varnished wires )

Here too using hot melt glue, but in the process just don't overheat ferrite cores.

It's better ring-mixer toroid comes pre-assembled,
otherwise I know many kits end-up in corner of junk room, due to lack of knowledge by non-electronic new-bees...

( mailed frm mobile )

Patrick Pugh Sawian
 

Arv,

Thankyou very much for the prompt reply. For a moment there i thought it was quality issues. Yes indeed, the flexibilty in design to accomodate future addons is remarkable. Farhan has done a great job at that.

73ees,
Pat
VU3PAT


On Thursday, December 1, 2016 11:21 PM, "Sandeep Lohia sandeeplohia12@... [BITX20]" wrote:


 
Friends, just don't use Cyanoacrylate based ( fevi-quick ) adhesive.
It's vapour or contact can make nearby metal catch very bad rust, oxide... ( including varnished wires )
Here too using hot melt glue, but in the process just don't overheat ferrite cores.
It's better ring-mixer toroid comes pre-assembled,
otherwise I know many kits end-up in corner of junk room, due to lack of knowledge by non-electronic new-bees...
( mailed frm mobile )



Ryan Flowers
 

Thanks for the excellent discussion on this. I borrowed a bit of clear nail polish from my daughter, and that worked just fine. I built it up last night and started receiving with it, although I have yet to transmit with it until I work out the tuning range, and also perhaps a finer way to adjust the frequency. 

This is temporary just to get the quirks out, then I will build a nicer enclosure:


Sandeep Lohia
 


On Dec 1, 2016 11:21 PM, "Sandeep Lohia" <sandeeplohia12@...> wrote:
>
> Friends, just don't use Cyanoacrylate based ( fevi-quick ) adhesive.
> It's vapour or contact can make nearby metal catch very bad rust, oxide... ( including varnished wires )
>
> Here too using hot melt glue, but in the process just don't overheat ferrite cores.
>
> It's better ring-mixer toroid comes pre-assembled,
> otherwise I know many kits end-up in corner of junk room, due to lack of knowledge by non-electronic new-bees...
>
> ( mailed frm mobile )

Forgot to mention, I was also using baking soda along with fevi-quick ( cyanoacrylate based ) this combination of white-cement bonds almost anything instently but real bad for electronics in long run...

- Repair & Reuse or Recycle E-Waste

Don Conlee
 

I glued mine down to try to help with the drift, but I have been unable to get the coverage above 7150 with the trimmer.  Should I remove a turn to make it higher?

Don N4RTB

On Thu, Dec 1, 2016 at 10:21 AM, Arv Evans arvid.evans@... [BITX20] <BITX20@...> wrote:
 


Pat   U3PAT

From his pictures a couple of the toroids had bent over slightly and one in the
bandpass filter was turned about 75 degrees.  The toroids are not glued in place
in this kit, leaving possibility for users to make modifications without having to
remove or break glue.  It is a feature, not a problem.  If after receiving your new
BITX-40 v3 you want to secure the toroids, this can be done using hot-melt glue,
melted wax, or model airplane glue.  Other adhesives might also work.

I would suggest not securing the VFO inductor until you are sure you have it
adjusted to cover the tuning range that you desire.  It may be necessary to remove
or add one turn on this inductor.  This situation arises because the 40 meter
band is slightly different in different ITU regions.

Arv  K7HKL
_._


On Wed, Nov 30, 2016 at 11:12 PM, patrick_pugh2000@... [BITX20] <BITX20@...> wrote:
 

Loose toroids.? You're scaring me. Ordered mine yesterday. What's the lead time usually?

Pat
Vu3pat