Date   
Re: ubitx schematic cleanup #ubitx

tdelozie
 


Hi Evan,
 I have seen questions similar to yours and others which can take a little work to find the answer. To hopefully help, I created a page on the wiki for this group with links to the various versions as well as known errata. It is open to anyone group membership to update or add to.

https://groups.io/g/BITX20/wiki/Ubitx-Schematics

I don't know exactly how or when HFSignals will reorganize their website with the launch of v5, but I trust they will provide an acceptable way to view info from the various versions.

I hope this is helps,
Tom - KF5NWC

Re: Any Gerber Experts Round Here? #kicad #ubitx

MVS Sarma
 

Re: CLK 0

jim
 

More SW broadcast (what little seem to be left)  Tweaking and idea and circuit I've been wanting to play with for years

Jim

On Saturday, February 23, 2019, 6:40:45 PM PST, Vince Vielhaber <vev@...> wrote:


Broadcast is one thing, if you're listening to hams running AM, many of
them are running old equipment that drifts, so you'd be constantly
re-tuning to zero beat.

Vince - K8ZW.

On 02/22/2019 03:17 PM, Don, ND6T via Groups.Io wrote:
> Jim,
>
> Why a separate AM detector? When the reference oscillator is calibrated
> then you just tune to the carrier frequency and it is zero beat. I've
> been listening to broadcast on the BITX since I first went digital with
> them. It works better than the normal AM detector since the carrier
> isn't necessary. No distortion. Exalted carrier.
> Biggest issue is the narrow filter band pass. But it's good enough for
> my ears.
> 73,
> Don
>

--



Re: very low audio output

Bruce Manton
 

MY ubitx v4 had the exact same issues you indicate.
Its basically a long way off callibration.
Best fix is to reload the new Auduino sketch 1.08 from dr Ian Lee KD8CEC (ubitx nano operating system).
Check out youtube
 
 
Dr Ian Lee has made many many improvements, it will correct a number of callibration problems.
 
I can't help with the software install, 
 As an Arduino guru at my radio club did the install.
Westlakes amateur radio club in Teralba (Newcastle Australia).
If you need help contact your nearest amateur radio club

thanks,
73's,
Bruce
VK2GU

Re: very low audio output

Bruce Manton
 

Hi Will,
MY ubitx v4 had the exact same issues you indicate.
Its basically a long way off callibration.
Best fix is to reload the new Auduino sketch 1.08 from (nano operating system).
Check out youtube


Dr Ian Lee has made many many improvements, it will correct a number of callibration problems.

I can't help with the software install, 
 As an Arduino guru at my radio club did the install.
Westlakes amateur radio club in Teralba (Newcastle Australia).
If you need help contact your nearest amateur radio club

thanks,
73's,
Bruce
VK2GU

On Sun, 24 Feb. 2019, 17:07 <will.benn@... wrote:
micro BITX shipped 2 Nov 2018 So not sure what version this  is  .Built in Dec .Still trying to get it going .many Ham friends have had a go .All the display seems to be working ok .But  when we get a signal it is so soft you have to put your ear to the speaker .The  tones in the  morse  test setting went up in pitch loud and clear .We  have checked with an Audio generator connected at the volume pot and the audio is working well with normal volume levels Wondering Is there a faulty comp .we  have a circuit diagram  .but  no test point data. voltages etc  .and test point locations.  .Would  like to get it going .Would it help to reprogram it .AT 73 not that good with computers .how  is this done   Have been on u tube and seen Peter Parkers  VK3YE working with nice audio and signal working portable. So know how it should work .Would appreciate any help 73 Cheers Will Bennett VK4WBX

very low audio output

will.benn@...
 

micro BITX shipped 2 Nov 2018 So not sure what version this  is  .Built in Dec .Still trying to get it going .many Ham friends have had a go .All the display seems to be working ok .But  when we get a signal it is so soft you have to put your ear to the speaker .The  tones in the  morse  test setting went up in pitch loud and clear .We  have checked with an Audio generator connected at the volume pot and the audio is working well with normal volume levels Wondering Is there a faulty comp .we  have a circuit diagram  .but  no test point data. voltages etc  .and test point locations.  .Would  like to get it going .Would it help to reprogram it .AT 73 not that good with computers .how  is this done   Have been on u tube and seen Peter Parkers  VK3YE working with nice audio and signal working portable. So know how it should work .Would appreciate any help 73 Cheers Will Bennett VK4WBX

Re: ubitx schematic cleanup #ubitx

MadRadioModder
 

Well I didn’t want to be so obvious to say you may consider reading through the history of the development of the alternate PA transistors in the forum.  This is a support group but it only works if you read what has happened previously so you are “up to speed”.  That will probably clear up 99%+ of your confusion.

 

MRM

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Evan Hand
Sent: Saturday, February 23, 2019 6:38 PM
To: BITX20@groups.io
Subject: Re: [BITX20] ubitx schematic cleanup #ubitx

 

MadRadioModder,

First thing is you are entitled to your opinion, as I am entitled to mine.

With that understanding,
1 - At first I was confused on the schematic, and I have passed my US Extra exam, so your assumption on Everyone is off by at least one.  I thought that it was an option to add the second devices in parallel.  I had to ask the question to get the correct answer. 
2 - The diagram is very congested in that area of the schematic.  I had difficulty in just reading the second value of the device, and the pin out numbers were so mixed in with the nonessential wires so as they were hard to read with my 60+ year old eyes.
3 - Though I have not done much in Amateur radio for over 30+ years, I am an engineer and have been dealing with schematics for electronics for all of those years and then some.
4 - The alternate parts are not provided by HF Signals, so not sure why they are even there on the documentation from them.

I appreciate the comments against my idea of cleaning up the schematic (Again thank-you Curt and Ted,  I continue to learn from both of you),  If you are stating that this is common for amateur radio documentation, then I will stand corrected.  In the work that I have done, this type of ambiguity is not acceptable.

I do not appreciate the derogatory comments.  If the intent is to prove that you are better then me, then fine, I concede that point in only the current acceptability of current radio documentation standards, assuming you are correct (still only your opinion at this point).

This is not the first time that I am trying to make it easier for others new to the ubitx journey.  Obviously I had worked out that both parts were not there, or would not have mentioned it.

Again, My Opinions.  I will continue to state them in as reasonable a fashion as I can.  I started a separate thread just so any one not interested can mute the thread, or me individually, if they so desire.  I reserve that right as well.

73
Evan
AC9TU 


Virus-free. www.avg.com

--

…_. _._

Re: ubitx schematic cleanup #ubitx

Evan Hand
 

Thank-you Raj for the details. 

Would still like to see the HF Signals web pages updated, at least to the current shipping version and handle the v4 as archive like v3.

73
Evan
AC9TU

Re: Any Gerber Experts Round Here? #kicad #ubitx

Tom, N8TPN
 

Many Thanks Ben!

Tom - N8TPN

Re: ubitx schematic cleanup #ubitx

 

Evan,

The missing transistors are for alternate use of RDD series. You remove the IRFs and replace with RDD16.
RDD pin outs are different so you have been provided alternate holes on PCB.

The missing caps places are there if you want to put them in to compensate for flattening the power. Options only!

Raj

At 23-02-19, you wrote:
Not sure who is the correct person to send this to in a private email, so created a new thread for all to see.

When I first started on the ubitx journey, I was often confused by the differences between what was on the published schematic and what was actually provide. Currently there are 2 that I am aware of:
1 - Q942 and Q952 do not exsist, and I am not sure would work as shown (most times you need some sort of resistor or other feedback to keep 2 parallel active devices sharing the load). Regardless, they are not there
2 - C210 and C216 also do not exist (though at least they do have a 0 as the value}.

I know that these are minor points, however there is enough things to learn without having to verify that the schematic is in fact what is on the board.

This should not take that much effort, as it is just removing the components from the original and saving a new PDF.

The above are my opinions only
73
Evan
AC9TU

Re: CLK 0

Vince Vielhaber
 

Broadcast is one thing, if you're listening to hams running AM, many of them are running old equipment that drifts, so you'd be constantly re-tuning to zero beat.

Vince - K8ZW.

On 02/22/2019 03:17 PM, Don, ND6T via Groups.Io wrote:
Jim,

Why a separate AM detector? When the reference oscillator is calibrated
then you just tune to the carrier frequency and it is zero beat. I've
been listening to broadcast on the BITX since I first went digital with
them. It works better than the normal AM detector since the carrier
isn't necessary. No distortion. Exalted carrier.
Biggest issue is the narrow filter band pass. But it's good enough for
my ears.
73,
Don

Re: ubitx schematic cleanup #ubitx

Evan Hand
 

MadRadioModder,

First thing is you are entitled to your opinion, as I am entitled to mine.

With that understanding,
1 - At first I was confused on the schematic, and I have passed my US Extra exam, so your assumption on Everyone is off by at least one.  I thought that it was an option to add the second devices in parallel.  I had to ask the question to get the correct answer. 
2 - The diagram is very congested in that area of the schematic.  I had difficulty in just reading the second value of the device, and the pin out numbers were so mixed in with the nonessential wires so as they were hard to read with my 60+ year old eyes.
3 - Though I have not done much in Amateur radio for over 30+ years, I am an engineer and have been dealing with schematics for electronics for all of those years and then some.
4 - The alternate parts are not provided by HF Signals, so not sure why they are even there on the documentation from them.

I appreciate the comments against my idea of cleaning up the schematic (Again thank-you Curt and Ted,  I continue to learn from both of you),  If you are stating that this is common for amateur radio documentation, then I will stand corrected.  In the work that I have done, this type of ambiguity is not acceptable.

I do not appreciate the derogatory comments.  If the intent is to prove that you are better then me, then fine, I concede that point in only the current acceptability of current radio documentation standards, assuming you are correct (still only your opinion at this point).

This is not the first time that I am trying to make it easier for others new to the ubitx journey.  Obviously I had worked out that both parts were not there, or would not have mentioned it.

Again, My Opinions.  I will continue to state them in as reasonable a fashion as I can.  I started a separate thread just so any one not interested can mute the thread, or me individually, if they so desire.  I reserve that right as well.

73
Evan
AC9TU 

Re: ubitx schematic cleanup #ubitx

MadRadioModder
 

The boards (and I’m sure the Gerber files) so both parts… so why wouldn’t the schematic?  Everyone who passes a ham test knows you don’t use both parts together.

 

MRM

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Evan Hand
Sent: Saturday, February 23, 2019 1:31 PM
To: BITX20@groups.io
Subject: Re: [BITX20] ubitx schematic cleanup #ubitx

 

Ted,
Thank-you for pointing that out.  I understand now that this is an alternate device, however I would have preferred not showing two devices in parallel on the schematic, with the pin out labeled by the device.  Rather, put the pin out in a table with letters on the schematic that are resolved by the device and pin assignments in the table that lists the alternative devices.  That is what I have seen in alternate device choices.  Regardless, are there any plans by HR Signals to provide boards with the RD15HV1 parts?  If not, then the schematic should represent the version that is being provided.  In other words, put the correct PDF on the HF Signals web page so we know what we are getting.

My opinion.
73
Evan


Virus-free. www.avg.com

--

…_. _._

Re: Any Gerber Experts Round Here? #kicad #ubitx

Ben Holmes
 

Wack me again... (haven't finished my coffee!) ... it's in the files section here in a subfolder 'K6QV'

Ben - K6QV

Re: Any Gerber Experts Round Here? #kicad #ubitx

Ben Holmes
 

Wack me upside the head, should have thought of that ... I've uploaded the files I got... I cannot vouch that it makes a functioning uBitx, I can only vouch that a Chinese vendor used the files and sent me PCB boards.

Re: Ubitx - using Amateurradiokits.in AGC #ubitx

Dennis Yancey
 

I have one of those kits that I decided not to use. It is just as received from Sunil, if interested, let me know.
--
72 and God bless
KD4EPG

Re: ubitx schematic cleanup #ubitx

Evan Hand
 

Ted,
Thank-you for pointing that out.  I understand now that this is an alternate device, however I would have preferred not showing two devices in parallel on the schematic, with the pin out labeled by the device.  Rather, put the pin out in a table with letters on the schematic that are resolved by the device and pin assignments in the table that lists the alternative devices.  That is what I have seen in alternate device choices.  Regardless, are there any plans by HR Signals to provide boards with the RD15HV1 parts?  If not, then the schematic should represent the version that is being provided.  In other words, put the correct PDF on the HF Signals web page so we know what we are getting.

My opinion.
73
Evan

Re: Ubitx - using Amateurradiokits.in AGC #ubitx

Dan Schaefer
 

Thank you.  The picture helps confirm I put the parts in the right places.  Appreciate the clear picture. Harder to see on the manual  copies. 

Dan.  W3BU




On Feb 23, 2019, at 2:25 AM, Wayne Leake <wayneleake@...> wrote:

Just thought, I should have added this picture of a finished board, showing the parts nicely.

<dummyfile.0.part>

Dang big picture.




--
k

Re: ubitx schematic cleanup #ubitx

Ted
 

I'll wager those extra final section reservations will accommodate a pair of 
 RD15HVF1, subject to checking pinout. I know they have 2 of the leads reversed as compared with the IRF510's.  The former are true RF devices and are rated to do well at 12v.

I'll let the class know how that works out, when my pair come in and I shove them into a version 5 board.




Ted
K3RTA

Re: ubitx schematic cleanup #ubitx

Curt
 

Evan

thanks for many thoughtful and useful posts here to this list.  they certainly have helped me.  

the 2 different PA's are alternatives (one of our local builders questioned the same thing).  I have no clue why the designer left them there even in v5 -- but it does keep us on our toes.  I haven't researched those caps -but I would imagine there is a place for them in the layout - for those making modifications.  

As you know Farhan I trust stays quite busy - otherwise we would not be blessed to have a ubitx.  What might seem small to us may not fit into his schedule.  

Glad to journey with you.  I hope to report when my ubitx gets measured it passes spurious, and I am toying with a couple of the AGC circuits (I now realize I may have installed them wrong - yes when the style of the schematic, that leaves off the off-board components confuses me!)

73 Curt WB8YYY