Date   
Re: RadioKits.in Case #ubitx

chris gress <Chrisg0wfh@...>
 

I just ordered a red case they are taking orders again chris G0WFH


On Sun, 8 Apr 2018, 15:52 KM4TRT via Groups.Io, <garello=aol.com@groups.io> wrote:

but I believe the demand has been such that they're on hold until April 15.
Some, or all, might be 'out of stock' for now.

Mike Yancey, KM5Z
Dallas, Texas, USA

Mike, I just got an email from amateur radio kits that they are shipping in about a week.
Andy KM4TRT

Re: AGC circuit to try?

Lawrence Galea
 

1970 SSB Handbook
Regards
Lawrence

On Sat, Apr 14, 2018 at 1:31 PM, MAuVE111 <info.mauve@...> wrote:
Thanks Lawrence for the memories,

Your scan rung a long dormant bell (nostalgia face here). 
Do they come from the ARRL SSB handbook, where you scanned it from, or an original QST article sometime along 1965-1975?
Can't readily tell, but the pleasure doesn't change.

73 Nikos SV1IYF


HiOn 13/4/2018 11:41 μμ, Lawrence Galea wrote:
Ge evening Allison.
I mentioned it because of the two fets used in cascade at the front end and the use of agc.
It's design being nearly 50 years old is a totally different concept.
As you said the semiconductors are obsolete but one could use modern ones if they want to do so.
However, I have scanned the article which is hereto attached.
I scanned it at 600 dpi so I had to split it into three PDF files because of the 20 Mb attachment limit. 
Regards to all.
Lawrence

On Thu, Apr 12, 2018 at 2:48 PM, ajparent1 <kb1gmx@...> wrote:
ARRL Single Sideband for the Radio Amateur 1970 p193 et seq.
"An Engineer's Ham-Band Receiver"

I've duplicated the PLL for another radio and copied ideas for radios I have built.
They worked very well.

Three reasons its not a fit for uBITx......
One: the MOSFets used disappeared in the late 70s.
Two: Its a narrow band front end using varicap tuning, usually called a preselector. Lots of band coils.
Three: is it would require much switching to take it out of the transmit path.

Allison



Re: Best Basswood BITX Box Board Placement?

Doug W
 

William's wizardly wood workmanship warrants warm well-wishing.

Re: KD8CEC 1.061 firmware functionality

Rod Davis
 

Bob,

Thank you for the feedback.

I am starting to write a Memory Manager guide, and this is valuable feedback for that process.

Currently I do not have the answers. I will collaborate with Ian, and hope to resolve these questions
in a timely manner.

Best Regards,

Rod KM6SN

cc: Ian KD8CEC


On 04/14/2018 05:03 AM, Robert Goodwin wrote:
Rod, et al.,
     I am running the CEC FW v 1.061 and using Memory Manager v1.01 and I have several questions.
Features that seem to work well include:
a.  VFO A and B and their modes being set from Memory Manager and easily controllable from the function button of the uBITX
b.  Tuning steps being established by Memory Manager and changeable from the medium duration function button push of the uBITX
c.  The ability to establish, save and see bands in the uBITX that were defined in the Memory Manager.  That said. two things are not very clear in this area:
     c1:  What is the function of the 'Band Count' text box?  Is it necessary that it be filled in.
     c2.  I put the CB band frequencies in Band 10, but it does NOT appear on the uBITX list of bands under Band Select option of the function button.  All other specified bands do show up on the uBITX list of bands to be selected from.  Why?
d.  Under 'User Interface' of the Memory Manager, checking or unchecking the '1/2 Line Toggle' works to change the 1st/2nd line display on the uBITX.  'S Meter' and 'Always display Callsign' do NOT appear to have any effect on uBITX operations.  I have found some older references by Ian Lee that the 'S Meter' is pending but nothing to indicate whether the 'Always display Callsign' should or should not work.  Other features in this section not yet tested by me.
e. User Channel Configuration in Memory Manager does result in these options being available under the list of 'Channel to VFO' in the uBITX.  Very nice feature, especially for the 10 channels with the labels
f.  'WSPR - Configuration' in Memory Manager successfully results in at least one WSPR message option from the 'WSPR Beacon' option of the uBITX function button.

HOWVEVER, there as several things that either don't work, or which I have not yet cracked to code on how to make work.
1.  What is supposed to be stored in the 'Master', 'LSB', 'USB', and 'CWL/U' calibration text boxes of the Memory Manager?
2.  What is the purpose/function of the VFO A / VFO B Section.  There are text boxes for entering VFO A and B frequencies and Modes, but they do not appear to affect what is displayed on the uBITX, which boots up to the last values used when turned on.  Also, most text boxes for frequency entry on the Memory Manager specify whether data is to be entered in kHz or Hz, but these two VFO A and VFO B frequencies do not specify the units. How is this section supposed to be used?
3.  What is the function of the CW ADC Ranges in the Memory Manager?  What does ADC stand for and what are the units of the ranges?
4.  What is the function of the Memory Key section?  Is it functional?  I am particularly interested in the purpose of the 'Tune TX Type' which appears to attempt to define receiving and transmitting behavior, in and/or out of ham bands? 
5.  In the 'Band Count' area of Memory Manager,
     5a.  what is the function of the 'Auto Integration' buttons for 1, 2, & 3.  Are these defining the legal ham bands for different regions of the world?
     5b.  what is the purpose of the 'Band Count' in Memory Manager and how does it affect the Band options shown when using the Band Select option of the uBITX function button.
6.  What is the function / effect of putting values in the 'Saved Band Freq' section of the Memory Manager?  What does it affect in the operation of the uBITX?
7.  What is not yet functional in the 'User Interface' section of the Memory Manager in terms of having any effect on uBITX functionality?
8.  In the WSPR Configuration section of the Memory Manager,
     8a.  The X-TAL text box shows 25,000,000 (without the commas I've typed in for clarity).  Does this ever need to be changed?  If so, to what?  How determine X-TAL value?
     8b.  Like all other 'Calibration' values in the Memory Manager this one shows '0' but has guidance to 'Correct the calibration value according to the WSPR result  ex) 147000,  145000'.  What does this guidance mean?  What is a WSPR result and where is this value provided?

I love these features but feel confused and unsure of myself in the absence of answers to the above questions.

Respectfully,
Bob Goodwin , N4HCI




Re: VE1BWV audio pop fix - lost my sidetone

K4LXY <zehrhj2@...>
 

The fix for the missing sidetone turned out to be very simple - a .1 (104) cap in series with R253 to block DC.
Howard

Best Basswood BITX Box Board Placement?

Bill Meara
 

KD8CEC 1.061 firmware functionality

Robert Goodwin
 

Rod, et al.,
     I am running the CEC FW v 1.061 and using Memory Manager v1.01 and I have several questions.
Features that seem to work well include:
a.  VFO A and B and their modes being set from Memory Manager and easily controllable from the function button of the uBITX
b.  Tuning steps being established by Memory Manager and changeable from the medium duration function button push of the uBITX
c.  The ability to establish, save and see bands in the uBITX that were defined in the Memory Manager.  That said. two things are not very clear in this area:
     c1:  What is the function of the 'Band Count' text box?  Is it necessary that it be filled in.
     c2.  I put the CB band frequencies in Band 10, but it does NOT appear on the uBITX list of bands under Band Select option of the function button.  All other specified bands do show up on the uBITX list of bands to be selected from.  Why?
d.  Under 'User Interface' of the Memory Manager, checking or unchecking the '1/2 Line Toggle' works to change the 1st/2nd line display on the uBITX.  'S Meter' and 'Always display Callsign' do NOT appear to have any effect on uBITX operations.  I have found some older references by Ian Lee that the 'S Meter' is pending but nothing to indicate whether the 'Always display Callsign' should or should not work.  Other features in this section not yet tested by me.
e. User Channel Configuration in Memory Manager does result in these options being available under the list of 'Channel to VFO' in the uBITX.  Very nice feature, especially for the 10 channels with the labels
f.  'WSPR - Configuration' in Memory Manager successfully results in at least one WSPR message option from the 'WSPR Beacon' option of the uBITX function button.

HOWVEVER, there as several things that either don't work, or which I have not yet cracked to code on how to make work.
1.  What is supposed to be stored in the 'Master', 'LSB', 'USB', and 'CWL/U' calibration text boxes of the Memory Manager?
2.  What is the purpose/function of the VFO A / VFO B Section.  There are text boxes for entering VFO A and B frequencies and Modes, but they do not appear to affect what is displayed on the uBITX, which boots up to the last values used when turned on.  Also, most text boxes for frequency entry on the Memory Manager specify whether data is to be entered in kHz or Hz, but these two VFO A and VFO B frequencies do not specify the units. How is this section supposed to be used?
3.  What is the function of the CW ADC Ranges in the Memory Manager?  What does ADC stand for and what are the units of the ranges?
4.  What is the function of the Memory Key section?  Is it functional?  I am particularly interested in the purpose of the 'Tune TX Type' which appears to attempt to define receiving and transmitting behavior, in and/or out of ham bands? 
5.  In the 'Band Count' area of Memory Manager,
     5a.  what is the function of the 'Auto Integration' buttons for 1, 2, & 3.  Are these defining the legal ham bands for different regions of the world?
     5b.  what is the purpose of the 'Band Count' in Memory Manager and how does it affect the Band options shown when using the Band Select option of the uBITX function button.
6.  What is the function / effect of putting values in the 'Saved Band Freq' section of the Memory Manager?  What does it affect in the operation of the uBITX?
7.  What is not yet functional in the 'User Interface' section of the Memory Manager in terms of having any effect on uBITX functionality?
8.  In the WSPR Configuration section of the Memory Manager,
     8a.  The X-TAL text box shows 25,000,000 (without the commas I've typed in for clarity).  Does this ever need to be changed?  If so, to what?  How determine X-TAL value?
     8b.  Like all other 'Calibration' values in the Memory Manager this one shows '0' but has guidance to 'Correct the calibration value according to the WSPR result  ex) 147000,  145000'.  What does this guidance mean?  What is a WSPR result and where is this value provided?

I love these features but feel confused and unsure of myself in the absence of answers to the above questions.

Respectfully,
Bob Goodwin , N4HCI



Re: AGC circuit to try?

Nikos SV1IYF
 

Thanks Lawrence for the memories,

Your scan rung a long dormant bell (nostalgia face here). 
Do they come from the ARRL SSB handbook, where you scanned it from, or an original QST article sometime along 1965-1975?
Can't readily tell, but the pleasure doesn't change.

73 Nikos SV1IYF


HiOn 13/4/2018 11:41 μμ, Lawrence Galea wrote:

Ge evening Allison.
I mentioned it because of the two fets used in cascade at the front end and the use of agc.
It's design being nearly 50 years old is a totally different concept.
As you said the semiconductors are obsolete but one could use modern ones if they want to do so.
However, I have scanned the article which is hereto attached.
I scanned it at 600 dpi so I had to split it into three PDF files because of the 20 Mb attachment limit. 
Regards to all.
Lawrence

On Thu, Apr 12, 2018 at 2:48 PM, ajparent1 <kb1gmx@...> wrote:
ARRL Single Sideband for the Radio Amateur 1970 p193 et seq.
"An Engineer's Ham-Band Receiver"

I've duplicated the PLL for another radio and copied ideas for radios I have built.
They worked very well.

Three reasons its not a fit for uBITx......
One: the MOSFets used disappeared in the late 70s.
Two: Its a narrow band front end using varicap tuning, usually called a preselector. Lots of band coils.
Three: is it would require much switching to take it out of the transmit path.

Allison


Re: uBITX shipping time

a.vision
 

Hi my ubitx was posted via India mail on the 12th April and received today on the 14th just 2 working days and no customs charges brilliant now the fun begins.

On 13 April 2018 at 06:38 "a.vision via Groups.Io" <a.vision@...> wrote:

Hi ordered my ubitx on 15th February and received shipping notice yesterday look forward to delivery now shipped via India post.The only thing that I found dissapointing is that people who ordered their ubitx after me were being shipped before me . 







Sent from Samsung tablet
 


-------- Original message --------
From: "Don N9GOD via Groups.Io" <n9god@...>
Date: 12/04/2018 20:01 (GMT+00:00)
To: BITX20@groups.io
Subject: Re: [BITX20] uBITX shipping time

Looks like shipping is catching up. My ubitx ordered Mar 1 shipped today Apr 12
--
check http://n9god.com for electronics publication in English and Foreign formats


 

Re: TDA2822 fried

philip yates
 

Mine has FCI and Pl1 then TDA2822M on it, have had it on RX for quite some time.

Phil - G7BZD

On Sat, Apr 14, 2018 at 8:17 AM, Raj vu2zap <rajendrakumargg@...> wrote:
WX is the marking.

Ideally cut the 12V track and feed 9V from a regulator. I use a 78L09 soldered on to the board as a hear sink.
You can use a 7809 or 7808 on the chassis and run a wire.

Raj

At 14/04/2018, you wrote:
Do we know what the markings are on the faulty IC's

Phil - G7BZD

On Sat, Apr 14, 2018 at 5:18 AM, Mvs Sarma <mvssarma@...> wrote:
Nice PAUL,
 Don't just increase volume much and don't immediately use ear / headphones. Many buyers, are perhaps not using the experiences  of others. The do irrelevenat and then only relaise after frying the TDA. Perhaps one can pre install a 6V regulator before starting the rig and save the device.

all the best
sarma
 vu3zmv



Â

Regards
MVS Sarma
Â

On Sat, Apr 14, 2018 at 2:16 AM, Paul N2QXB <n2qxb@...> wrote:
Just got my package  and so glad that the chip now has a socket



Re: TDA2822 fried

 

WX is the marking.

Ideally cut the 12V track and feed 9V from a regulator. I use a 78L09 soldered on to the board as a hear sink.
You can use a 7809 or 7808 on the chassis and run a wire.

Raj


At 14/04/2018, you wrote:
Do we know what the markings are on the faulty IC's

Phil - G7BZD

On Sat, Apr 14, 2018 at 5:18 AM, Mvs Sarma <mvssarma@...> wrote:
Nice PAUL,
 Don't just increase volume much and don't immediately use ear / headphones. Many buyers, are perhaps not using the experiences  of others. The do irrelevenat and then only relaise after frying the TDA. Perhaps one can pre install a 6V regulator before starting the rig and save the device.

all the best
sarma
 vu3zmv



Â

Regards
MVS Sarma
Â

On Sat, Apr 14, 2018 at 2:16 AM, Paul N2QXB <n2qxb@...> wrote:
Just got my package  and so glad that the chip now has a socket


Re: TDA2822 fried

philip yates
 

Do we know what the markings are on the faulty IC's

Phil - G7BZD

On Sat, Apr 14, 2018 at 5:18 AM, Mvs Sarma <mvssarma@...> wrote:
Nice PAUL,
 Don't just increase volume much and don't immediately use ear / headphones. Many buyers, are perhaps not using the experiences  of others. The do irrelevenat and then only relaise after frying the TDA. Perhaps one can pre install a 6V regulator before starting the rig and save the device.

all the best
sarma
 vu3zmv



 

Regards
MVS Sarma
 

On Sat, Apr 14, 2018 at 2:16 AM, Paul N2QXB <n2qxb@...> wrote:
Just got my package  and so glad that the chip now has a socket



Re: TDA2822 fried

MVS Sarma
 

Nice PAUL,
 Don't just increase volume much and don't immediately use ear / headphones. Many buyers, are perhaps not using the experiences  of others. The do irrelevenat and then only relaise after frying the TDA. Perhaps one can pre install a 6V regulator before starting the rig and save the device.

all the best
sarma
 vu3zmv



 

Regards
MVS Sarma
 

On Sat, Apr 14, 2018 at 2:16 AM, Paul N2QXB <n2qxb@...> wrote:
Just got my package  and so glad that the chip now has a socket


Re: #uBiTx CW RF power out #ubitx

Alan -MMØWXT
 

On Mon, Mar 5, 2018 at 07:46 pm, Jerry Gaffke wrote:
Set bias for 100ma of drain current on each IRF510 using RV2 and RV3 and then leave it be.
That 100ma shouldn't change much even if you were to go from a 12v PA-PWR to 24v. 

Adjust power level using RV1 on the uBitx.  (RV1 sets IRF510 drain current on the Bitx40)
For SSB, could also vary power level by adjusting the mike gain at Q6 somehow.

I assume the smoked U1 was marked "WX".  Can you verify?
The WX clones blow for no particular reason.
The WX probably works reliably if the supply voltage is reduced to 5v or so, down from 12v.
Search for "TDA2822" in this forum to see some nice long discussions
The NTE7155 will probably work fine, perhaps you could report back on that too.

> The first signal reports were the audio was poor with too much high frequencies and no mid to low.

Sounds like the 12mhz bfo is positioned incorrectly relative to the passband of the crystal filter.
Should be able adjust your audio (both transmit and receive, affects both equally)
by using the calibration routine in the Raduino for the bfo frequency adjust.

Jerry, KE7ER


On Mon, Mar 5, 2018 at 07:23 pm, Bob wrote:

My question is how to set the maximum power? Use Rv2 and Rv3 to set the bias or use Rv1 to back off the drive after the bias has been set using Rv2 and Rv3.

 


 Hi Jerry I have an FCI/FOI TDA in my ubitx batch 2. It is very hot indeed after rig on for an hour.is there an over voltage issue to the chip?

Thank you again for all your help getting it going again with the RF510.
--
MMØWXT
GQRP - #15057

Re: #uBiTx CW RF power out #ubitx

Alan -MMØWXT
 

I can agree. The vast amount of help received Seems to have got me sorted with rf at the dummy load. Just now to get it on air for a signal report.

--
MMØWXT
GQRP - #15057

Re: VK4PLN's Radrino replacement boards

K9HZ <bill@...>
 

Thanks Nick.  MUCH easier on the eyes…

 

 

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

 

Moderator – North American QRO Group at Groups.IO.

 

email:  bill@...

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Nick VK4PLN
Sent: Friday, April 13, 2018 6:22 PM
To: BITX20@groups.io
Subject: Re: [BITX20] VK4PLN's Radrino replacement boards

 

Here we go folks:


73


Virus-free. www.avg.com

Re: VK4PLN's Radrino replacement boards

Nick VK4PP
 

PDF Version

Re: VK4PLN's Radrino replacement boards

Nick VK4PP
 

Here we go folks:


73

TDA2822 -- what's a vendor to do?

Jim Strohm
 

Hi

This is kind of an Ashhar question....

What's to become of all those fast-failing TDA2822 chips?
Has the vendor offered any compensation?  The main reason I'm asking is -- I've been in a number of positions, both professionally and as a hobbyist, when something went wrong at a scale like this -- approaching unity failure -- and I'm wondering whether either the vendor or the manufacturer has done anything regarding a full-scale make-good.

At my current company (no, I cannot offer any more details) a vendor of a user-level component suddenly started shipping their assembled interface devices that randomly failed.  Well, more like "most of the time" and not just "randomly."

The closest I've seen to that problem is the counterfeit FTDI serial-to-USB chips that plagued us amateurs a few years ago.  FTDI never offered a make-good, and most of the end-user companies didn't, either. 

So, Ashhar, has your vendor offered any recompense yet?

73
Jim N6OTQ

I've already suggested that your issue and the FTDI issue be considered in my company's resolution. 

 

update to KD8CEC 1.061 firmware user manual

Rod Davis
 

Hi All,

attached is an updated user manual for the KD8CEC 1.061 firmware.

The updates were to

1. incorporate feedback received on the manual, with some new
    operating tips,and

2. enhance the Memory Manager section a bit, and

3. improve readability.


As before, please send any feedback to the email address shown in the manual.


A new manual for KD8CEC firmware rev 1.07 is forthcoming, as is a manual on the Memory Manager.

Regards,

Rod KM6SN