Date   

Re: Email still coming in no email button selected

Retroradio
 

Arv,

Its an iPad. 
The emails go to email account “A” 
I also have email account “B”
If I log into the group with either email addy, the post emails still go to “A”.

I think the issue might be as follows. 
Email “A” was my groups under the old Yahoo. 
I joined this group using “B” email. 
So, I tagged both for “no emails”, closed “B” and logged in with “A”. The problem was still there.

Hopefully this makes sense. I am unsure how to proceed and thanks to your and others for the help.




On Nov 22, 2020, at 8:58 PM, Arv Evans <arvid.evans@...> wrote:



Jaytee

Okay.  Reed may bed onto something.  If you do have another ID on the 
BITX20 group it could be that you are receiving messages via that ID.

Some email handlers on some operating systems and on some browsers 
support Email pulls using the URL directly  via POP-3 and/or via IMAP and/or SMTP..  
I am not all that familiar with Windows (it has been years since I did Windows 
stuff).  There are several alternate ways to poll for email using UNIX, Linux, 
BSD, OSX (Apple), etc.  Less likely is that someone could have redirected their 
BITX20 messages to you, but it has been done before.

Depending what you are using to access emails, you may be able to expose 
the full path that those emails have been taking.  In some systems there is 
something called an MX-record.  If your email handler supports it, you can 
sometimes open the full MX record via a command in your browser or email 
handler.  This is a little difficult to read unless you are fairly familiar with the 
various email handling system.

Apologies for the delay in getting back to you.  The last two days have been 
occupied with trying to calm down another situation where one member of a 
group is trying to get another member of the same group banned for using 
Bold Capital letters in his posts.  If it is not one thing it is another.  

Arv
_._

On Sun, Nov 22, 2020 at 6:10 AM <jaytee1@...> wrote:
Okay for the Admin.
I have blocked this contact in my email and will see if that worked. 
Great try and suggestions but its strange that it cant be stopped with the “No Email” selection. If a solution is found for that then I will be able to get emails only on the threads I’m following as opposed to all.
Once again thanks all for the help.


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Arv Evans
 

Todd K7TFC

This type schematic layout has become fairly common in recent years, especially 
for situations where a pair of devices are connected in parallel.  Drawing the base 
leads up, over, and down (with a bridge over the leads from pin 3) would possibly 
be more complex than the way it was done in your schematic.  It is also possibly 
closer to the way the runs on a PCB would be arranged if they need to be as short 
as possible .

Arv
_._


On Sat, Nov 21, 2020 at 4:44 PM Todd Carney <carneytf@...> wrote:
Folks,

On Farhan's schematic for v.6, the pre-drivers, drivers, and finals transistors are drawn in a way I've never seen before. There's solid lines from the base of one transistor through the circle body of the transistor to the base of the next transistor. Examples include Q911 & Q912, Q92 & Q93, etc.


Is this a shorthand way of drawing parallel transistors (i.e., the bases are connected together)?

Thanks! Todd K7TFC


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Arv Evans
 

This has already been covered a few times.  What you are looking at is symbology 
that is trying to show you how to connect one type of MOSFET or a different type 
of MOSFET.  It is showing a one-or-the-other situation.  

Arv
_._


On Sun, Nov 22, 2020 at 4:07 AM Gerard <kabupos@...> wrote:
hello,
I had already asked the question, but I did not get an answer
on the schematic  of ubitx 6, there are like 2 transistors mounted in parrallele on the final stage
We see an IRF510 and a RD15HV in //.
Maybe it’s a choice of transistor? You put one or the other?
I don’t quite understand the diagram

for traduction fron Italien, try reverso
Avevo già posto la domanda, ma non ho avuto risposta
sul piano dell'ubitx 6, ci sono come 2 transistor montati in parrallele sul piano finale
Vediamo un IRF510 e un RD15HV in parallelo.
Potrebbe essere una scelta di transistor? Si mette uno o l'altro?
Non capisco lo schema

Loris, se capisci questo, è che Reverso non funziona troppo male

cdt


Re: Email still coming in no email button selected

Arv Evans
 

JayTee

Just sent you some more suggestions.  It may be necessary to access the MS-record 
for those unwanted email to see the start and ending delivery path.

Arv
_._

On Sat, Nov 21, 2020 at 5:50 PM <jaytee1@...> wrote:
Arv,

I un-subscribed and re-subscribed as suggested and the problem is still ongoing. Almost Immeadiately started receiving emails.

Another other suggestions???


Re: Email still coming in no email button selected

Arv Evans
 


Jaytee

Okay.  Reed may bed onto something.  If you do have another ID on the 
BITX20 group it could be that you are receiving messages via that ID.

Some email handlers on some operating systems and on some browsers 
support Email pulls using the URL directly  via POP-3 and/or via IMAP and/or SMTP..  
I am not all that familiar with Windows (it has been years since I did Windows 
stuff).  There are several alternate ways to poll for email using UNIX, Linux, 
BSD, OSX (Apple), etc.  Less likely is that someone could have redirected their 
BITX20 messages to you, but it has been done before.

Depending what you are using to access emails, you may be able to expose 
the full path that those emails have been taking.  In some systems there is 
something called an MX-record.  If your email handler supports it, you can 
sometimes open the full MX record via a command in your browser or email 
handler.  This is a little difficult to read unless you are fairly familiar with the 
various email handling system.

Apologies for the delay in getting back to you.  The last two days have been 
occupied with trying to calm down another situation where one member of a 
group is trying to get another member of the same group banned for using 
Bold Capital letters in his posts.  If it is not one thing it is another.  

Arv
_._

On Sun, Nov 22, 2020 at 6:10 AM <jaytee1@...> wrote:
Okay for the Admin.
I have blocked this contact in my email and will see if that worked. 
Great try and suggestions but its strange that it cant be stopped with the “No Email” selection. If a solution is found for that then I will be able to get emails only on the threads I’m following as opposed to all.
Once again thanks all for the help.


Re: New PCB available for WA2EBY linear amp #linear-amp

kc0wox Leeper
 

Diz at kitsandparts.com has a toroid kit for the WA2EBY amp

About 20 years ago when I made my amp and manual I asked Diz if he would make up a torroid kit and he did. It simplifies obtaining the torroids. I'm amazed that his kit is the same $6.00 that it was about 20 years ago. The web page gets several hundred hits a month.
Leonard
KC0WOX


Re: New PCB available for WA2EBY linear amp #linear-amp

AndyH
 

Gah - forget the best part:  Diz at kitsandparts.com has a toroid kit for the WA2EBY amp.

https://www.kitsandparts.com/WA2EBY_toroidkit.php

73, Andy


Re: New PCB available for WA2EBY linear amp #linear-amp

AndyH
 

Ken,

  It looks like a nice board, especially if one wants to work with a single band.  The original amp project has two boards - one for the amp (with the same input attenuator option - add resistors or jump), and a second board for the lowpass filters for 160 thru 10 meters.

   The good news is that Far Circuits still has the boards available.

http://www.farcircuits.net/rfpa2.htm
https://www.farcircuits.net/ARRL%20Handbook.html

Broadband HF amp, ifr510's 1w in, 40 w out (two board set)

$19.50 Set

  KC0WOX did a full build and test manual that's a nice addition to the ARRL articles originally penned by WA2EBY:
http://golddredgervideo.com/kc0wox/wa2ebyamp/index.htm

  I love mine!  I run it from both 13.8 and 28 VDC.  I found a heatsink that's very closely sized to the part originally specified by WA2EBY and find that it doesn't generate much heat even when running 28V and sending out a 2 minute WSPR 'shout'. hihi  I'm guessing that the heatsink you found will do even better than the smaller one originally spec'd.

  73, Andy, KG5RKP


Re: kit-projects AGC with uBITX v5 - need help #v5

KE2GKB
 

Lets start with some pictures of the switch its a weird configuration, but yeah something is definitely not.

Off Should be 0 Ohms that's correct (its a short to ground) Fast should be Just shy of 470K Slow should be 1meg

however this switch like I said is a little odd, Hence the wiring instructions in the documentation. To test this without the switch you can easily just bridge Common (Black) to Red(fast) or Purple(slow) and see if you get the expected AGC action.

it's something like 2 pole shorting switch. or a type1 DPDT. Lots of conversations on the forums about what it "actually" is But I have attached the internals so you can also check it against your wireup

-- Tim Keller - KE2GKB https://shop.kit-projects.com


Re: kit-projects AGC with uBITX v5 - need help #v5

Rob French (KC4UPR)
 

Black to ground, resistance, below.  To be clear, this is measuring from the square pad at the end of the diode, where I have the thin black wire soldered in the picture.

OFF (down) - 0 ohms
SLOW (middle) - ~800 ohms
FAST (up) - ~800 ohms

So clearly something is not right here.  I'm guessing that SLOW should resolve to 1M and FAST should be something less (470k?), but not 800 ohms! 

I also went and individually measured the two resistors.

The 470k resistor... I am able to measure a good value across that in OFF and SLOW. When I measure it in FAST, it shows as a short.  I don't think that makes sense.

The 1M resistor... All switches positions, it measures as 0 ohms.

Unless there is other broken component providing a path to ground, my guess is that something is broken in my switch. I do know that I had removed a washer or nut from the base of the switch in order to have it mount flat against the inside of my rig.  I wonder if I overtightened the mounting nut and caused some type of mechanical failure or deformation inside the switch.

I'll need to verify, but it should be an easy matter to desolder those connections and put some jumpers in to test the settings. 

What's the part # on that switch?  I'll probably need to order a couple.  Or, alternatively I could make up some little relay circuit board to put the AGC under software control...

Regards,
-Rob KC4UPR


Re: kit-projects AGC with uBITX v5 - need help #v5

KE2GKB
 

No worries rob life gets us all eventually, So off hand I'm not 100% sure what could be going on. So a few tests to try.

Can you try a 1V RMS ~550HZ signal? Sometimes I have noticed the detector is a little odd on higher frequencies. Second, Could you measure the resistance presented on the black Switch wire to ground in all 3 positions?

A low S-Meter (Or bias voltage as it also happens to be) is either the input buffer transistor being bad, Or what its feeding being bad. At least those are the typical issues. Lets start there

-- Tim Keller - KE2GKB https://shop.kit-projects.com


Re: kit-projects AGC with uBITX v5 - need help #v5

Rob French (KC4UPR)
 

Sorry,  you had asked about the black wires by RF Gain. Those are two lengths of RG174 to a front panel RF gain pot. I have since removed those and replaced with a jumper while I troubleshoot.


Re: kit-projects AGC with uBITX v5 - need help #v5

Rob French (KC4UPR)
 

Sorry for the delay on this.  Life.

The black wire corresponds to the purple/magenta wire in the instruction manual, i.e. it connects across the two middle terminals of the switch.  The switch is kind of buried at the moment, but if needed I can try to dig it out.  I will note that with the the switch in the OFF position, my S-meter display goes away (as expected), and it reappears (albeit not very good) in either SLOW or FAST.  I'm fairly confident that I do have the switch wired up correctly.

I've tried injected a 1V RMS 1500 Hz audio signal into the yellow audio line.  I was hoping to see that result in AGC action being force, but no luck.  That caused little-to-no change in the value of my S-meter/the corresponding ADC (I will note in general that the ADC input voltage I'm seeing never gets above about 0.3-0.5V).  (As an aside, I also heard the 1500 Hz signal through my headphones... I'm not entirely sure how it's getting into the audio chain???)

Final note, if you look in the photo I posted before, right above the two RG-174 lines that go to the RF gain control, there are two solder pads with nothing between them.  Looking at the manual for the AGC, it appears there is supposed to be a capacitor here.  This appears to be an addition relative to the original ND6T design, but I imagine maybe it could have been an intentional change to the kit?  What was this capacitor for, what's it's value, and could its absence be the cause of any of my issues?

Thanks,
Rob KC4UPR


Re: Easy Bitx Kit #bitx20 #bitx40

Bob Lunsford
 

Very interesting, Sunil. I'll take a keen look at the 40M version. Thanks for the information.

Bob — KK5R

On Sunday, November 22, 2020, 9:57:10 AM EST, Sunil Lakhani <vu3sua@...> wrote:


It's been few months we launched are Easy Bitx Kit .
The kit has some new features that eleminate the earlier drawbacks of bitx kits .
The manual with complete details can be found on our website .
Easy Bitx has fifteen individual packets which help building in step by step.Just like the old days .
The kit is also available on our website .
The kit can be build for any one band .
80mt 40mt or 20mt .
The website has 20mt kit by default .if you wish a 40mt kit then include a note in purchase .
80mt one we will start soon .
Those who want the kit without enclosure can email us vu3sua@...

https://amateurradiokits.in

Best of 73s 
Sunil 


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Bob Lunsford
 

Most Romance languages (languages derived/descended from Latin) are that way. Personal pronouns, for example, are used with family and friends and considered impolite and improper if used with someone who is not family/friend. Portuguese is also in that category as is French. All pronouns in those languages use specific verb forms as well for nearly all pronouns and where the same form is used for more than one pronoun, it is considered useful to the student of that language but learning them as would a child would render them faulty or awkward usage if the wrong verb form were used with a particular pronoun. It would be like saying "I are" or "you is" in English. It's just not done unless Ebonics is used, which the former head of the Dept of Education in CA once said his mother told him was "bad English."

Even knowing Portuguese, those who do not know Spanish or Italian can usually get the gist of what is said. It's not as close as an English speaker attempting to read some Irish or Scottish brogue.

Imagine that there are over 350 languages and dialects in India, More than 450 languages and dialects in China and I once read that there were 1380 languages and dialects in Philippines but some of them only had 3 or 4 people speaking them. Once those people died, the language also died. But those in the Philippines came mostly from six Malasian roots.

Foreign language interests me as I grew up with Portuguese and Spanish and when in High School and college in Brazil, I had to study Latin and French... I since then have dabbled in Italian and Japanese.

This also adds to the interest in the V6 since it is useful to listen in to many shortwave broadcasts. It's nice to have an alternative to CW, sometimes.

Bob — KK5R

On Sunday, November 22, 2020, 9:08:20 AM EST, Todd Carney <carneytf@...> wrote:


The difference between "formal" pronouns and "familiar" ones is an ordinary feature of many languages: Italian is one of many including Spanish and French. Most school children in the English-speaking world are at least exposed to it.

On Sun, Nov 22, 2020, 1:08 AM IW4AJR Loris <lorisbollina@...> wrote:
Hello Todd

It is extremely difficult to translate Italian into English ...
Italian is a complex and unique language in concepts and definitions, English is too simplistic a language to express certain concepts ... 
Do you want an example: 

tu sei -> you are 
voi siete -> you are 
tu hai -> you have 
voi avete -> you have 

it is enough for you ? .... Loris


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Bob Lunsford
 

Evan, I trust your interpretation of the data sheets. Your logic for opting for the IRF510 corresponds to my rationale for selecting this instead of the more expensive one. The operating voltage difference would indicate to me at first blush that the 510 may well get you by an SWR faux pas and anything that can keep me from removing the board to replace/repair broken final transistors is a decision maker.

Thanks again for the spec sheet details.

I had an SB-104 once that I built and a lightning strike down the killed the PA drivers because unless the radio is "on" the antenna is fed directly by the drivers which corresponds to Low Power operation. I did not have the direct replacement on hand but had transistors that were identical physically but were designed for UHF operation. I plugged them in and the radio worked perfectly since the UHF transistors were overkill as far as electrical specifications was concerned. This taught that such overkill is cheap insurance, in the long run. From then on, by the was, when the radio was not being used, it was switched to short out the output/antenna connector, another form of cheap insurance.

Bob — KK5R

On Sunday, November 22, 2020, 7:54:20 AM EST, Evan Hand <elhandjr@...> wrote:


Bob,
The IRF510 and RD15HVF1 can both be used in this design, but are not really electrically equal, nor are they near the same cost (if you can find the RD15HVF1 part).  For this transmitter, the RD15HVF1 would be a better part to keep the output more consistent across the bands.  

The IRF510 was designed as a high-speed high power switch.  The RD15HVF1 was designed to be used as a VHF power amp. 
The IRF510 has a higher voltage capability.
The RD15HVF1 has better gain at higher frequencies.

The BIG difference is in the price.  Doing a quick search on the internet gave an eBay price of $6.00 for the RD15HVF1 vs a Mouser price for the IRF510 of $0.98 for quantity one.

Since there are other parts of the uBITX that limit the power output at 10meters, the advantage of the higher frequency of the RD15HVF1 is negated to a large extent.  You could spend the $12+ shipping to experiment, but not really worth it to me.  It will not solve any of the earlier boards (v3, v4) purity issues so you are spending money for, at best,  a few watts at the higher end of the range.  You can get some of the frequency advantages by increasing the voltage to the finals in the uBITX with the IRF510s, the design for the RD15HVF1 is 12.5volts.  The side effect of increasing the voltage using the IRF510s is that the power goes up across all of the bands, not just the higher ones (for some this is a good thing).

Above are my interpretations of the datasheets I found and could be in error.  I just wanted to point out that they are not truly the same, just that both will work in the uBITX as designed.
As always I am happy to get any feedback or corrections so that I can continue to learn about this hobby.
73
Evan
AC9TU


Re: Email still coming in no email button selected

Vince Vielhaber
 

Could you be subscribed with more than on email address? Stopping one but getting the mail from another one?

Vince - K8ZW.

On 11/22/2020 12:11 PM, jaytee1@cogeco.ca wrote:
Admins....any suggestions.
I blocked this group on email and its still coming through. Now I am
really confused. Endstate, I may have to unsubscribe and only subscribe
when I have a question the un-subscribe....Not efficient at all.....lol


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Jerry Gaffke
 

Kind of painful here with our internet connection (come on Starlink!),
but did manage to grab the 5mB article from the arrl website for a look.
OCT 2010 - QST (PG. 37)  Homebrew Challenge II Co-Winner -- The Lowest Cost Entry;  
Author: Cripe, David, NM0S;   
http://p1k.arrl.org/pubs_archive/137696      (for ARRL members)

>  I doubt it's a linear amp, and thus not suitable for SSB.   
It's class E using EER for SSB transmissions, so definitely not a linear amp.
This Envelope Elimination and Restoration thing is very cool, I've considered trying it.
But I'm not aware of a commercial amateur product that uses it, and there are reasons for that.
Check for IMD!

>  I doubt it has flat gain from 2 to 30mhz like the QSX amp.
Strictly 40m

>  I doubt it gets 50W when running on 12vdc.
Actually, he is running those IRF520's on 12v.  Which is rather surprising to me.

>  It probably needs a signal source with way more power than the QSX amp,
>  as the QSX amp includes a suitable driver stage.
Article doesn't say, but I'd guess it wants a watt or two.  So maybe 10x the QSX amp.

Jerry


On Sun, Nov 22, 2020 at 11:55 AM, Jack, W8TEE wrote:
Thanks!
 


Re: uBitX v.6 schematic / driver and finals transistor symbols / #ubitxv6 #v6

Jack, W8TEE
 

Jerry:

Thanks!

Jack, W8TEE

On Sunday, November 22, 2020, 12:40:29 PM EST, Jerry Gaffke via groups.io <jgaffke@...> wrote:


Jack,

The IRF520 has double the gate charge, so needs more drive.
It is not trivial to build a good wideband driver, and more power can mean an extra stage.
If all you want is 10W in a linear amp, two IRF510's is a good choice.

I'll have to look at that QST article.
I doubt it's a linear amp, and thus not suitable for SSB.
I doubt it has flat gain from 2 to 30mhz like the QSX amp.
I doubt it gets 50W when running on 12vdc.
It probably needs a signal source with way more power than the QSX amp,
as the QSX amp includes a suitable driver stage.

Hans also has a 50W kit for a class C amp (non linear) at $29.50:
    https://www.qrp-labs.com/50wpa.html
Includes a PIN diode TR switch, which is very cool.
Uses two IRF510's.

Jerry, KE7ER



On Sun, Nov 22, 2020 at 09:13 AM, Jack, W8TEE wrote:
I was just reading an article by David Cripe (QST, Oct., 2010) which won the QST Challenge that year. He designed a 50W amp based in the IRF520. His amp cost $32 to build and the power transistors are dirt cheap. Is there a reason why they are not more widely used?
 
Jack, W8TEE

--
Jack, W8TEE


Re: SWR meter with second arduino

Gerard
 

Dennis,
Otherwise, I spent my afternoon watching videos on Kicad.
Well, I learned more. I hope to progress. LOL
cdt

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