Date   
Re: uBITX Version 4 first attempt #ubitx-help #ubitx

Richard
 

Bob Bennett -

Unless I am reading this wrong - I am the original poster and I didn't smear a thing, so are you addressing this to someone else?  If not, it's clear you didn't read the post -  I asked 2 questions regarding my first build, and a bunch of people decided my post would be a nice place to turn into keyboard warriors, that being said.

Can anyone explain to me the method for calibrating a V4, about 58 comments back I listed the difference in the code used in the V4 Firmware, and it is clearly different?

--
Richard
KC7DDW

Re: Thoughts on a Ham Bus

Tim Gorman
 

Jerry,

I think you missed the point. After WWII huge numbers of these
connectors were available because they were made for military use and
it was easy for commercial and private interests to obtain them and use
them. The amateur community is going to have a difficult time
generating a standard that sees widespread acceptance with lots of
availability purely because of limited economic impact.

Any future standard is going to have to also be made in huge numbers as
well. Otherwise it will never become a "standard". The only entity
today that can generate that kind of usage of a standard *will* be
military based.

The only other entity that had that kind of power for setting a
standard was the old Bell System. Look at the RJ-8 and RJ-45 standards
or even the N-connector. They were driven by usage in the telephone
systems. But the Bell System no longer exists and is no longer capable
of driving standards.

I'm not sure what RF connectors you are speaking of but if you go to
the Amphenol site even the SMC connector is based on a mil-spec
standard.

The phono connector will work at RF but it has many problems. It is not
a positive mechanical connection and is subject to corrosion affects.

Again, standards become standards because of a lot of use in a lot of
places. You would be better off looking for a standard bus arrangement
by looking at electronic equipment in the military. Those standards see
a lot of usage, they last for a long time, and there are typically
multiple suppliers. I know some of that equipment used plug-in cards
with a backplane.

tim ab0wr



On Thu, 21 Jun 2018 11:32:48 -0700
"Jerry Gaffke via Groups.Io" <jgaffke=yahoo.com@groups.io> wrote:

Going from "the PL259 somehow got established as a standard in the
ham world 80 years ago" to "any bus standard that succeeds will
likely have originated in some military gear" is quite a leap.
 Nothing much is mil-spec about the uBitx.

There's better choices than the PL259 and/or the BNC for coax these
days. But they got established, and hams are a conservative lot.
For HF QRP , some would argue that an RCA audio connector is a better
choice (I would).

Somewhat related, several in the forum have reported that the BNC
jack supplied with the kit has been machined with less than ideal
tolerances.  If you aren't seeing any power out to your dummy load,
be sure to check that the center pin of your BNC is reliably making
contact, and perhaps spend a few bucks on a better jack.  Something
like Mouser 530-B1094. 

Jerry, KE7ER

On Thu, Jun 21, 2018 at 09:40 am, Tim Gorman wrote:


I think you'll find the so239/pl259 combination as well as the bnc
were first standardized by the military and then the commercial
industry picked them up.

Unless you can find a bus standard that has been adopted by the
military first you probably aren't going to find wide acceptance.

Re: uBITX Version 4 first attempt #ubitx-help #ubitx

Arv Evans
 

On Thu, Jun 21, 2018 at 12:30 pm, Richard wrote:
Richard   KC7DDW
It was not your message that started the flame burst.  In message 52499 another member hijacked your
topic and inserted the objectionable comments.  From that point on it seems that your request for help
just got lost in the rants and counter-rants. 

Hopefully now that things have quieted down a bit someone can answer your query and help with the
problem.

Arv  K7HKL
_._

Re: uBITX Version 4 first attempt #ubitx-help #ubitx

Arv Evans
 

Richard

It was not you.  In message 52499 someone hijacked your topic and caused all the flames.
Your original post got lost somewhere in the rants and counter-rants.
Things have died down a bit now so maybe someone can help you with the problem.

Arv
_._


On Thu, Jun 21, 2018 at 1:36 PM Richard <richard@...> wrote:
Bob Bennett -

Unless I am reading this wrong - I am the original poster and I didn't smear a thing, so are you addressing this to someone else?  If not, it's clear you didn't read the post -  I asked 2 questions regarding my first build, and a bunch of people decided my post would be a nice place to turn into keyboard warriors, that being said.

Can anyone explain to me the method for calibrating a V4, about 58 comments back I listed the difference in the code used in the V4 Firmware, and it is clearly different?

--
Richard
KC7DDW
--
Richard
KC7DDW

Re: I'm really stuck! No Xmit Pwr. #ubitx

Latham, Chip
 



Howard Many Thanks,

This Group is an awesome resource.

RF Situation Resolved.

Latham, Chip
 

Howard (WB2VXW) called this morning and we went thru quite a bit of testing and things were not added up, until I mentioned that I had replaced the heatsink, made sure it was isolated from ground but forgot the FETs needed to be isolated from each other as well.
Thanks Howard, that was a stupid mistake on my part. I own it!
Farhan forgive me for suggesting there might have been a possibility of rushing the board out, getting ready for the release of V4.0
Chip
N5FJK

Re: I'm really stuck! No Xmit Pwr. #ubitx

Latham, Chip
 

Thank you! to everyone who pitched in to HELP.
Chip

Re: Encoder problem

Norm. N7NSD
 

It only varies 50hz. It has never worked. It was suggested that I install the denouncing components to solve the problem. I have done so but no change. 

Re: Encoder problem

Norm. N7NSD
 

And yes, rotating only causes the display to flicker the last two freq digit from zero to fifty. After pressing the encoder and getting the change band option, turning causes no change. Same with the next press and then back to 40m where it won’t change freq. 

Re: Encoder problem

Peter Parker
 

I had this problem when trying different software versions. 

I had success by uploading it again to the Arduino. 

Re: Microscope - - new thread

T Williams
 

Re: #52380 "Seems to me you could DIY something better than those
$60 Chinese special microscopes ... "

Consider a SolderScope. (See QRP Quarterly, Apr. 2018.) (www.qrparci.org) 
Its a DIY binocular stereo inspection microscope for about $50.

Get a pair of 3.5X - 420mm dental magnifying loupes for $30 or so from Ebay/
Amazon.  Add +2 reading glasses in front of the loupes. (Dollar store readers
work OK.) Mount the loupes on a desk lamp stand.

I built the first SolderScope almost 2 years ago and use it daily while the
AmScope SE-400 sits unused. Advantages of the SolderScope are low cost, wide
field, 7 inch working distance and I can keep my eyeglasses on.

Web page at http://www.qsl.net/k9ac/solderScope.html has full details.

73,

Tom Williams,  K9AC

Re: Encoder problem

Mike aka KC2WVB <rb5363@...>
 

I had the identical symptoms with my BitX after it was assembled. It was the encoder that was the issue. They are fragile so I ordered 5 and was very careful when I made the switch. It came to life immediately once the new one was installed.

I did not bother to read the other comments but I tested my original encoder with a DMM and set the meter on continuity test with one lead off the encoder going to ground which I think is the yellow wire and the other off, one at a time, the brown then black wire locations on the encoder. As you rotate the knob you should see: short, open, short, open..... On mine one pin out to ground worked as I indicated but the other was constant short.

Here is the replacement part that worked very well for me.


 
Order Details
 
Your salesorder number is 54975240.
 
DetailsAvailable QuantityBackorder QuantityUnit
Price
Extended
Price
 
 
PEC11R-4020F-S0012
PEC11R-4020F-S0012-ND
ENCODER ROTARY
 
Available
Quantity
Backorder
Quantity
Unit
Price
Extended
Price
 
13301.68000(USD) 8.

On Thu, Jun 21, 2018, 4:32 PM <n7nsd@...> wrote:
And yes, rotating only causes the display to flicker the last two freq digit from zero to fifty. After pressing the encoder and getting the change band option, turning causes no change. Same with the next press and then back to 40m where it won’t change freq. 

Re: Microscope - - new thread

M Garza <mgarza896@...>
 

Tom,
Thank you for this.  I just purchased a set of loupes and was disappointed that they really didnt help.  I now have a use for them.  Now to find a lamp stand...

Thanks again,

Marco - KG5PRT

On Thu, Jun 21, 2018 at 4:23 PM T Williams via Groups.Io <n41w124=yahoo.com@groups.io> wrote:
Re: #52380 "Seems to me you could DIY something better than those
$60 Chinese special microscopes ... "

Consider a SolderScope. (See QRP Quarterly, Apr. 2018.) (www.qrparci.org
Its a DIY binocular stereo inspection microscope for about $50.

Get a pair of 3.5X - 420mm dental magnifying loupes for $30 or so from Ebay/
Amazon.  Add +2 reading glasses in front of the loupes. (Dollar store readers
work OK.) Mount the loupes on a desk lamp stand.

I built the first SolderScope almost 2 years ago and use it daily while the
AmScope SE-400 sits unused. Advantages of the SolderScope are low cost, wide
field, 7 inch working distance and I can keep my eyeglasses on.

Web page at http://www.qsl.net/k9ac/solderScope.html has full details.

73,

Tom Williams,  K9AC

Re: Encoder problem

Mike aka KC2WVB <rb5363@...>
 

I see I did not indicate where my encoder came from. It was Digi Key. So once again.

 
Order Details
 
Your salesorder number is 54975240.
 
DetailsAvailable QuantityBackorder QuantityUnit
Price
Extended
Price
 
 
PEC11R-4020F-S0012
PEC11R-4020F-S0012-ND
ENCODER ROTARY
 
Available
Quantity
Backorder
Quantity
Unit
Price
Extended
Price
 
13301.68000(USD) 8.

On Thu, Jun 21, 2018, 5:29 PM R. Michael Boyer <rb5363@...> wrote:
I had the identical symptoms with my BitX after it was assembled. It was the encoder that was the issue. They are fragile so I ordered 5 and was very careful when I made the switch. It came to life immediately once the new one was installed.

I did not bother to read the other comments but I tested my original encoder with a DMM and set the meter on continuity test with one lead off the encoder going to ground which I think is the yellow wire and the other off, one at a time, the brown then black wire locations on the encoder. As you rotate the knob you should see: short, open, short, open..... On mine one pin out to ground worked as I indicated but the other was constant short.

Here is the replacement part that worked very well for me.


 
Order Details
 
Your salesorder number is 54975240.
 
DetailsAvailable QuantityBackorder QuantityUnit
Price
Extended
Price
 
 
PEC11R-4020F-S0012
PEC11R-4020F-S0012-ND
ENCODER ROTARY
 
Available
Quantity
Backorder
Quantity
Unit
Price
Extended
Price
 
13301.68000(USD) 8.

On Thu, Jun 21, 2018, 4:32 PM <n7nsd@...> wrote:
And yes, rotating only causes the display to flicker the last two freq digit from zero to fifty. After pressing the encoder and getting the change band option, turning causes no change. Same with the next press and then back to 40m where it won’t change freq. 

Re: Microscope - - new thread

Jerry Gaffke
 

And ...  we have both Tom and Don active in the forum if you have questions.
From the bottom of that webpage:

"The SolderScope was created by Tom Williams, K9AC and Don Cantrell, ND6T."

Don mentioned the SolderScope here:  https://groups.io/g/BITX20/message/52223

Jerry



On Thu, Jun 21, 2018 at 02:23 pm, T Williams wrote:
Re: #52380 "Seems to me you could DIY something better than those
$60 Chinese special microscopes ... "

Consider a SolderScope. (See QRP Quarterly, Apr. 2018.) (www.qrparci.org) 
Its a DIY binocular stereo inspection microscope for about $50.

Get a pair of 3.5X - 420mm dental magnifying loupes for $30 or so from Ebay/
Amazon.  Add +2 reading glasses in front of the loupes. (Dollar store readers
work OK.) Mount the loupes on a desk lamp stand.

I built the first SolderScope almost 2 years ago and use it daily while the
AmScope SE-400 sits unused. Advantages of the SolderScope are low cost, wide
field, 7 inch working distance and I can keep my eyeglasses on.

Web page at http://www.qsl.net/k9ac/solderScope.html has full details.

73,

Tom Williams,  K9AC

Re: uBitX CW Sidetone Volume

Mark M
 

Thanks, Skip, I was thinking along those lines. Did you put the pot between CW-TONE and ground and feed the wiper onward or put one end of the pot & the wiper where R250 was?

Mark    AA7TA

Re: Understanding Spurious Emissions

ajparent1/kb1gmx
 

Howard,

The mixer where the spur is generated is the mixer formed by T2/T3 that is about 
28db (after allowing for filter losses and all)  later in the stream and if that mixer
is overloaded you get the spur.  The driving modulator is then underdriven.

Work it backward.  If that mixer is overloaded at -7 oir -10DBM what got to be
happening well before that?   And that mixer can easily be driven to its 1DB
compression or worse without hurting the audio to the ear.

Allison

Re: Understanding Spurious Emissions

ajparent1/kb1gmx
 

Tim has it right.  By time you get to RV1, the signals are what they are.  There is no adjustment
prior to that other than audio level from the mic.

Allison

Re: Encoder problem

ajparent1/kb1gmx
 

I've used these encoders for other things and yes they are fragile.

I got so annoyed with the one on the Raduino I pulled and ancient mechanical
mouse out of junk, the kind with a DB9 serial connection and a rolling ball in
the bottom.  Pulled out the slotted wheel and the emitter/detector pair and
using the remains of a old Clarostat pot for the shaft and the bearing made
an optical encoder.  Its much more rugged, works well, and has better feel,
smoother.

Allison

Re: TDA 28222

Daniel Conklin <danconklin2@...>
 

Mine has the WX brand TDA2822.  I put a 6v regulator in the 12v supply line to the chip as suggested on this group and it has been working fine for a couple of months now.  The audio is loud and clear.  
Daniel, W2DLC