Date   
Re: show your mic

chris gress <Chrisg0wfh@...>
 

My basic mic


On Sun, 22 Apr 2018, 11:00 Mvs Sarma, <mvssarma@...> wrote:
lovely design


Regards
MVS Sarma
 

On Sun, Apr 22, 2018 at 3:08 PM, Gordon Gibby <ggibby@...> wrote:


Three pieces of wood, and cheap momentary contact push button.


On Apr 22, 2018, at 04:43, Mvs Sarma <mvssarma@...> wrote:

Max,
 please check whether the mic body is connected to chasis ground.
i mean the positive bias voltage for mic should come on independent pin and NOT to the body pin of the eletret element.

In case you are using a dynamic mic, perhaps we need more gain and your need to shout appers logical.

regards
sarma
vu3zmv

Regards
MVS Sarma
 

On Sat, Apr 21, 2018 at 11:27 PM, MAX <max@...> wrote:

Speaking of mics, I have to raise my voice almost to the level of shouting to get 5 watts out on 40 meters.  Is this normal or should I look for a problem?

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mvs Sarma
Sent: Saturday, April 21, 2018 7:17 AM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

I had grabed a taperecorder mic with 3.5mm mono pin.
 replaced the cable with 2+shield.had a small pushed switchmounted and wired.
 repalced the 3.5mm momo pin to stereo pin. Here is a image of my mic.The pp9 battery helps to imagine the mic size.
regards
 sarma
 vu3zmv



Re: Help with wiring the audio, mic, and key jacks

VU3WMJ@gmail.com Virtualview
 

How to store bfo and vfo frequency on ver 2.. help plse...... 


On Sat, Feb 10, 2018, 5:53 AM Michael Hagen <motdog@...> wrote:



On 2/9/2018 2:31 PM, Mike Lichtman via Groups.Io wrote:
I am confused wiring to the jacks. The standard jack terminal no.s do not seem to apply to the wiring pictorial.
Do I go by the jack terminal no.s or the way the wires are connected in the pictures? With the terminal side up and the plug
opening to the left, my reference says the terminal no.s are:     1 -terminal closest to opening, 2 single middle upper terminal, 3 back upper terminal,4 lower back terminal, 5 mid inside just next to 4. From the wiring pictorial it does make sense. Thank you in advance. 73 Mike KF6KXG

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Re: Help with VFO and BFO frequencies

Skip Davis
 

We need more information, what radio and what firmware are you using?
Also you needed to start a new subject line for your question and not use an unrelated topic line it keeps down the confusion. Note I changed the subject line. 

Skip Davis, NC9O

On Apr 22, 2018, at 09:21, VU3WMJ@... Virtualview <vu3wmj@...> wrote:

How to store bfo and vfo frequency on ver 2.. help plse...... 

On Sat, Feb 10, 2018, 5:53 AM Michael Hagen <motdog@...> wrote:



On 2/9/2018 2:31 PM, Mike Lichtman via Groups.Io wrote:
I am confused wiring to the jacks. The standard jack terminal no.s do not seem to apply to the wiring pictorial.
Do I go by the jack terminal no.s or the way the wires are connected in the pictures? With the terminal side up and the plug
opening to the left, my reference says the terminal no.s are:     1 -terminal closest to opening, 2 single middle upper terminal, 3 back upper terminal,4 lower back terminal, 5 mid inside just next to 4. From the wiring pictorial it does make sense. Thank you in advance. 73 Mike KF6KXG

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Re: Wanted: your dead uBitx. #ubitx

docame12@...
 

I've got one, but I wasn't prepared to give up on it, just yet. I really wanted it working. Maybe I can pay you to fix it?  LOL!

World's BIGGEST BITX?

Bill Meara
 

Re: Help with wiring the audio, mic, and key jacks

MVS Sarma
 

 I tried to image the wirinfg as indicated by Asher Farhan  using eagle foot print. here is a ping
 the jack is mounted pins facing upwards
 then the image should likely help you
regards
 sarma
 vu3zmv

Regards
MVS Sarma
 

On Sun, Apr 22, 2018 at 6:51 PM, VU3WMJ@... Virtualview <vu3wmj@...> wrote:
How to store bfo and vfo frequency on ver 2.. help plse...... 

On Sat, Feb 10, 2018, 5:53 AM Michael Hagen <motdog@...> wrote:



On 2/9/2018 2:31 PM, Mike Lichtman via Groups.Io wrote:
I am confused wiring to the jacks. The standard jack terminal no.s do not seem to apply to the wiring pictorial.
Do I go by the jack terminal no.s or the way the wires are connected in the pictures? With the terminal side up and the plug
opening to the left, my reference says the terminal no.s are:     1 -terminal closest to opening, 2 single middle upper terminal, 3 back upper terminal,4 lower back terminal, 5 mid inside just next to 4. From the wiring pictorial it does make sense. Thank you in advance. 73 Mike KF6KXG

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...


Re: Erratic tuning with my new uBitx

Chris Clarke G3SQU
 

Hi Ian

I'm compiling, uploading and running v1.070 and I still have one  issue.

I suspect I must have a calibration problem, because in order to achieve a 600Hz CW TX off-set (to match my external 600Hz AF filter) I have had to hard code the call in <ubitx_20>  at line 647

si5351bx_setfreq(2, frequency - sidetone + 150) ;

I have checked the TX frequency with a my frequency counter and it is definitely off-set from RX by nearly 800Hz when <sideTone=600>, and is correctly offset with my addition of 150.

If I just change the value of the variable <sidetone = 450>, the TX offset is then correct but the audio tone frequency is way too low for comfortable listening on RX.

With <sidetone = 600> the audio sounds perfect, however the extra 150Hz TX offset applied by the call <si5351bx_setfreq(2, 600)> takes the received signal outside the passband of my external AF filter.

Can I change/calibrate one of the program parameters/variables to achieve the same end?

I am wary of doing anything via the calibration menu without being sure of not doing something irretrievable. Eg calibrating BFO could have implications I am unaware of, as this is not the simple BFO of which I am familiar from my 1960s analogue receiver days!

The problem was the same with earlier firmware versions (eg v1.061) so am I correct to assume that this is a hardware issue requiring calibration in some form?

Chris

Re: Low mic gain, was, show your mic

MAX <max@...>
 

Hi sarma.

 

I’m sure I have the polarity correct.  Someone on this list posted a drawing showing how to identify the negative terminal and I wired according to it.  I think the electret mic wouldn’t work at all if polarity were reversed.  What is being powered is an  F E T source follower.   I think I shouldn’t have to raise my voice to get 5 watts output on 40 meters.

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mvs Sarma
Sent: Sunday, April 22, 2018 3:44 AM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

Max,

 please check whether the mic body is connected to chasis ground.

i mean the positive bias voltage for mic should come on independent pin and NOT to the body pin of the eletret element.

In case you are using a dynamic mic, perhaps we need more gain and your need to shout appers logical.

regards

sarma

vu3zmv


Regards
MVS Sarma
 

 

On Sat, Apr 21, 2018 at 11:27 PM, MAX <max@...> wrote:

Speaking of mics, I have to raise my voice almost to the level of shouting to get 5 watts out on 40 meters.  Is this normal or should I look for a problem?

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mvs Sarma
Sent: Saturday, April 21, 2018 7:17 AM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

I had grabed a taperecorder mic with 3.5mm mono pin.
 replaced the cable with 2+shield.had a small pushed switchmounted and wired.
 repalced the 3.5mm momo pin to stereo pin. Here is a image of my mic.The pp9 battery helps to imagine the mic size.
regards
 sarma
 vu3zmv

 

Re: Low Mic Gain, was, show your mic

MAX <max@...>
 

Hi Raj.

 

I have the ubitx.  Thanks for the suggestions.  I see two trimming pots on the board but I haven’t touched them because I have no idea what they do.  It appears from your message that one is for adjusting the drive.  What is the other one for?

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Raj vu2zap
Sent: Sunday, April 22, 2018 4:54 AM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

Max,

From board to board there will always be some variation of gain.

You can increasing the mic gain by reducing the resistor

BITX40 - R123
uBITX - R63

You could try the mic gain control I described recently.

You could also increase the drive

BITX40 - R136
uBITX - RV1

Raj


At 21/04/2018, you wrote:

Speaking of mics, I have to raise my voice almost to the level of shouting to get 5 watts out on 40 meters.  Is this normal or should I look for a problem?
 
Regards.
 
Max K 4 O D S.
 
I've Never Lost the Wonder.
 
Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

Re: Low Mic Gain, was, show your mic

Skip Davis
 

Max your uBITX has three trim pots on it. Two are blue square unit labeled RV2 and RV3 these are together on the board and adjust the bias to the finals. The third one is RV1 which adjusts the drive level. There are instructions in the the file section on the group site to adjust the bias pots which may help improve your ssb output if yours isn’t set high enough.
Try searching the archives to learn about it and the pitfalls you might encounter.

Skip Davis, NC9O 

On Apr 22, 2018, at 12:53, MAX <max@...> wrote:

Hi Raj.

 

I have the ubitx.  Thanks for the suggestions.  I see two trimming pots on the board but I haven’t touched them because I have no idea what they do.  It appears from your message that one is for adjusting the drive.  What is the other one for?

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Raj vu2zap
Sent: Sunday, April 22, 2018 4:54 AM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

Max,

From board to board there will always be some variation of gain.

You can increasing the mic gain by reducing the resistor

BITX40 - R123
uBITX - R63

You could try the mic gain control I described recently.

You could also increase the drive

BITX40 - R136
uBITX - RV1

Raj


At 21/04/2018, you wrote:

Speaking of mics, I have to raise my voice almost to the level of shouting to get 5 watts out on 40 meters.  Is this normal or should I look for a problem?
 
Regards.
 
Max K 4 O D S.
 
I've Never Lost the Wonder.
 
Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

Ubitx.net site correction #ubitx-help #ubitx

W7PEA
 

The ubitx.net site says the wiring diagram for the volume control is incorrect. Its it now correct.

http://ubitx.net/wiring-up-the-volume-control/
^^ that page should be pulled or updated to reflect that change.

A wiki would be a great idea for the community so we can maintain the information together.
-W7PEA

Re: Teensy 3.5/3.6 upgrade for uBITX

Phil KI7WFM
 

Do you have any prototype adapter boards available? I would like to purchase one if available. I plan on using the Teensy 3.6 and switching to a 128x64 I2C/SPI Oled display.

Re: heat sink upgrade #bitx40 #parts

Doug W
 

As a follow up to my post about this heat sink, I did some testing of digital Tx'ing into a dummy load yesterday as I think I have my digital interface set up the way I want.  I did not use anything to test the temperature other than touching the MOSFET and heat sink and going by feel.  At a full 7 watts out nothing got more than just barely warm at FT8 cycles running for about 15 minutes.  At WSPR timing both the IRF510 and heat sink got hot enough I was double checking the junk box to make sure I had a few spare IRF510's.  Bottom line, I think this heat sink is ok for occasional FT8 operations at full power (which was all I wanted it for) but if WSPR is your flavor of choice you'll need to crank the power way down.  All in all I got what I wanted for about 73¢.  I should also mention that although it is hard to tell in the picture the MOSFET is fully sitting on the silicone pad.  I lined the pad up with the heat sink overlooking the fact the the IRF510 is angled coming off the board.  Fortunately the pad was wide enough to accommodate my error.

Re: Ubitx.net site correction #ubitx-help #ubitx

Jerry Gaffke
 

We've had a wiki up for a year or more:
    https://groups.io/g/BITX20/wiki/home
And it is a good idea.
The ubitx.net site offers the alternative of a curated site.
 
Jerry


1000 people editi

On Sun, Apr 22, 2018 at 10:25 am, W7PEA wrote:
The ubitx.net site says the wiring diagram for the volume control is incorrect. Its it now correct.

http://ubitx.net/wiring-up-the-volume-control/
^^ that page should be pulled or updated to reflect that change.

A wiki would be a great idea for the community so we can maintain the information together.
-W7PEA

 

 

Re: Low Mic Gain, was, show your mic

Jerry Gaffke
 

Twiddling the bias pots is dangerous, can easily blow the IRF510's.
The bias pots get set at the factory for around 100ma of drain current
as described in the tuneup section on hfsignals.com.
Output will become more non-linear as those bias pots get turned down,
and quiescent transmit power consumption goes up as they get turned up. 
Not much of an effect on power out.  I suggest you not mess with them.

The drive pot at RV1 on the uBitx does directly affect power out,
also the resistor in the mike amp that Raj pointed out for you.

Be aware that too much drive to the final will splatter all over the band.

Jerry


On Sun, Apr 22, 2018 at 10:15 am, Skip Davis wrote:
Max your uBITX has three trim pots on it. Two are blue square unit labeled RV2 and RV3 these are together on the board and adjust the bias to the finals. The third one is RV1 which adjusts the drive level. There are instructions in the the file section on the group site to adjust the bias pots which may help improve your ssb output if yours isn’t set high enough.
Try searching the archives to learn about it and the pitfalls you might encounter.
 

Re: BITX QSO Afternoon/Evening, Sunday, April 22, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

John P
 

On Fri, Apr 20, 2018 at 06:04 am, John 2e0eii wrote:
I would love to compete but I don't think UK stations ,can tx over 7.200. rgds John 2e0eii
Those of you who can't use 7277 use 7177 and it's not a contest, just a friendly get-together of BitX operators!
 
--
John - WA2FZW

Re: BITX QSO Afternoon/Evening, Sunday, April 22, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

Matthew S <Rigamurow@...>
 

I will be listening, but cannot transmit due to no license.  Will post to this forum if I hear anything.


On Sun, Apr 22, 2018 at 2:54 PM John P <j.m.price@...> wrote:
On Fri, Apr 20, 2018 at 06:04 am, John 2e0eii wrote:
I would love to compete but I don't think UK stations ,can tx over 7.200. rgds John 2e0eii
Those of you who can't use 7277 use 7177 and it's not a contest, just a friendly get-together of BitX operators!
 
--
John - WA2FZW

Re: Low mic gain, was, show your mic

MVS Sarma
 

if i recollect , a reverse polarity was also responding for voice but verey very lowand distorted.

Regards
MVS Sarma
 

On Sun, Apr 22, 2018 at 10:15 PM, MAX <max@...> wrote:

Hi sarma.

 

I’m sure I have the polarity correct.  Someone on this list posted a drawing showing how to identify the negative terminal and I wired according to it.  I think the electret mic wouldn’t work at all if polarity were reversed.  What is being powered is an  F E T source follower.   I think I shouldn’t have to raise my voice to get 5 watts output on 40 meters.

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mvs Sarma
Sent: Sunday, April 22, 2018 3:44 AM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

Max,

 please check whether the mic body is connected to chasis ground.

i mean the positive bias voltage for mic should come on independent pin and NOT to the body pin of the eletret element.

In case you are using a dynamic mic, perhaps we need more gain and your need to shout appers logical.

regards

sarma

vu3zmv


Regards
MVS Sarma
 

 

On Sat, Apr 21, 2018 at 11:27 PM, MAX <max@...> wrote:

Speaking of mics, I have to raise my voice almost to the level of shouting to get 5 watts out on 40 meters.  Is this normal or should I look for a problem?

 

Regards.

 

Max K 4 O D S.

 

I've Never Lost the Wonder.

 

Antique Electronics Site: http://www.angelfire.com/electronic/funwithtubes/

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Mvs Sarma
Sent: Saturday, April 21, 2018 7:17 AM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

I had grabed a taperecorder mic with 3.5mm mono pin.
 replaced the cable with 2+shield.had a small pushed switchmounted and wired.
 repalced the 3.5mm momo pin to stereo pin. Here is a image of my mic.The pp9 battery helps to imagine the mic size.
regards
 sarma
 vu3zmv

 


Re: Ubitx.net site correction #ubitx-help #ubitx

Mike Woods
 

W7PEA

Thanks for pointing this problem out.  It has now been corrected.  A number of these ‘syntheses’ need updating as new and better mods or fixes have been contributed by the community of experimenters.

Mike ZL1AXG uBITx.net


On Mon, 23 Apr 2018 at 5:25 AM, W7PEA <patrick@...> wrote:
The ubitx.net site says the wiring diagram for the volume control is incorrect. Its it now correct.

http://ubitx.net/wiring-up-the-volume-control/
^^ that page should be pulled or updated to reflect that change.

A wiki would be a great idea for the community so we can maintain the information together.
-W7PEA

Re: BITX QSO Afternoon/Evening, Sunday, April 22, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

John P
 

Not hearing anything but noise. Not even anything on FT-8 this afternoon! I'll be on again this evening.
--
John - WA2FZW