Date   
Re: Teensy 3.5/3.6 upgrade for uBITX

Jim Sheldon
 

I don't really have a clue regarding the Pi Zero.  I do know the Pi Zero is faster, with a bit more RAM.  I don't think it would easily replace a NANO, and wouldn't interface easily to the uBITX.  Not saying it can't be done, but someone other than our group will have to be the guinea pigs on that one LOL.

JIM

On Apr 22, 2018, at 7:28 PM, freefuel@... wrote:

Hi Jim, 

what are your thoughts on doing the same with the Raspberry Pi Zero boards? in some areas such as my own they can be purchased for as little as $5 USD. 

-Justin N2TOH

P.S. I should find the most effective place to ask about an Arduino IDE add on for the Pi boards so they might function as an Arduino alike board. 

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

Daniel Conklin
 

I could hear N4AEI, N2HTT, WI1B, and N4DR. There was also a KE0NEP, but I'm not sure I got the call right.  I asked for a relay to check in and someone heard me, but then some kind of loud buzzing covered everything up.
Dan W2DLC

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

Bruce MacKinnon KC1FSZ
 

I was only on for a few minutes, but Tom VE3THR was booming in here in MA. 

I worked him on my newly QRO'd station with 20W.  Bill N2CQR was kind enough to include the latest update on his blog: http://soldersmoke.blogspot.com/2018/04/kc1fszs-above-board-al-fresco-free.html

73s,
Bruce KC1FSZ https://www.qrz.com/lookup/kc1fsz





Re: Teensy 3.5/3.6 upgrade for uBITX

freefuel@...
 

at times I have wondered at what point has a person reached too many adapter boards, and should really consider a fresh start.  As you already stated about interfacing the Si5351A chip and the Raspberry pi board, they are after all both 3.3 volt IO devices.

-Justin N2TOH 

Re: Teensy 3.5/3.6 upgrade for uBITX

Jack Purdum
 

I'd consider why the Zero sells for $5. I think the biggest issue is that the Pi is a different animal than the Arduino family. First, it does not have a home in the Arduino IDE, where most of the µBITX work is being done. Second, it doesn't have the depth of add-ons that the Arduinos do. Those that do exist seem to be more expensive. Third, most of the work on Pi is either done in scripting languages or Python, neither of which is popular on the Arduino.

If you need more horsepower, consider the Protoneer (eBay 282786290858). It has 256K of flash, 32K of SRAM (HUGE benefit), and is clocked 3x faster than the Nano at a cost of $15. It looks very promising.

Jack, W8TEE


On Sunday, April 22, 2018, 8:45:16 PM EDT, Jim Sheldon <w0eb@...> wrote:


I don't really have a clue regarding the Pi Zero.  I do know the Pi Zero is faster, with a bit more RAM.  I don't think it would easily replace a NANO, and wouldn't interface easily to the uBITX.  Not saying it can't be done, but someone other than our group will have to be the guinea pigs on that one LOL.

JIM

On Apr 22, 2018, at 7:28 PM, freefuel@... wrote:

Hi Jim, 

what are your thoughts on doing the same with the Raspberry Pi Zero boards? in some areas such as my own they can be purchased for as little as $5 USD. 

-Justin N2TOH

P.S. I should find the most effective place to ask about an Arduino IDE add on for the Pi boards so they might function as an Arduino alike board. 

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

John Pieper
 

Not bad here this evening in Iowa. Worked KG5WLO, Ralph, VE3THR, Tom, and WS4JM, Jay. Also heard earlier WA3O, KE0NXP, WA4THR, and AC9RZ.

Used my uBITX with my half-wave (mostly) vertical wire.

John AD0RW

Re: uBitx Relay K3 Pins 1 and 5 Location

Tim Gorman
 

Paul has it right. The pin numbers on the schematic don't seem to have
any resemblance to the actual pin numbers on the data sheets. I had to
actually use an ohmmeter from attached components to determine the
actual pin locations on the bottom side of the circuit board.

tim ab0wr

On Sun, 22 Apr 2018 17:05:09 -0700
"alans77 via Groups.Io" <alans77=yahoo.com@groups.io> wrote:

Can anyone provide a picture on the location of K3 pins 1 and 5 on
the circuit board? The schematic pin numbers do not match the
manufacturers data sheet. 73, N4AYE

Re: heat sink upgrade #bitx40 #parts

Tim Gorman
 

Doug,

Thanks for the info. I usually use jt65. It sounds like this heat sink
would work fine for that, correct? About 45sec transmit cycles
interspersed with 1 minute receive cycles.

tim ab0wr

On Sun, 22 Apr 2018 10:37:07 -0700
"Doug W" <dougwilner@...> wrote:

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

Tom VE3THR
 

Come on guys...my BITX40 is no Maserati but it had an excellent night. 40M peaked about an hour before sunset (my greyline). That random QRM about every 10-15 min might be some kind of radar I'm told. No contests or QRN tonight...S5-S7 noise floor on the big rig. Guess no one is doing laundry tonight in my neighbourhood!
Record number of stations on tonight between 1900 - 2100 HRS Z. Most were well over 5x5 using my 40M dipole @ 30ft. QSO's with N4DR Marc, N6ORS Keith, KN4AIE Rick, WI1B Ken, WA4THR Vic, WA2FZW John, KC1FSZ, AC9RZ Doug and picked a few new ones WA3O Mike, N2HTT Mike, W2NDG, KE0NXP Glenn, AD0RW John and WS4JM Jay.
Mathew S. - get your ticket and join the group. Thanks for the reception reports.
Got my uBITX built and stuffed in a can, finally. Quickly upgraded to KD8CEC's V1.061 firmware. What a huge improvement from the stock version. Still not happy with the calibration settings so work in progress. I suspect the uBITX needs LOT'S OF MIC AUDIO from what I'm hearing up here so keep that mic up close and personal.
Tom VE3THR

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

pat griffin
 

We were in the middle of thunderstorms, rain and dogs scratching the door.  Undaunted, the bitx40 made it through the static crashes to reach WS4JM a few hundred miles to the North.  It took a few tries to finally get all of the call letters.  Maybe next week the uBitx will be complete-High Power!

73 all

Pat AA4PG


http://www.cahabatechnology.com/aa4pg.html


From: BITX20@groups.io <BITX20@groups.io> on behalf of Tom VE3THR <muzzmobility@...>
Sent: Sunday, April 22, 2018 7:33:29 PM
To: BITX20@groups.io
Subject: Re: [BITX20] BITX QSO Afternoon/Evening, Sunday, April 22, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.
 
Come on guys...my BITX40 is no Maserati but it had an excellent night. 40M peaked about an hour before sunset (my greyline). That random QRM about every 10-15 min might be some kind of radar I'm told. No contests or QRN tonight...S5-S7 noise floor on the big rig. Guess no one is doing laundry tonight in my neighbourhood!
Record number of stations on tonight between 1900 - 2100 HRS Z. Most were well over 5x5 using my 40M dipole @ 30ft. QSO's with N4DR Marc, N6ORS Keith, KN4AIE Rick, WI1B Ken, WA4THR Vic, WA2FZW John, KC1FSZ, AC9RZ Doug and picked a few new ones WA3O Mike, N2HTT Mike, W2NDG, KE0NXP Glenn, AD0RW John and WS4JM Jay.
Mathew S. - get your ticket and join the group. Thanks for the reception reports.
Got my uBITX built and stuffed in a can, finally. Quickly upgraded to KD8CEC's V1.061 firmware. What a huge improvement from the stock version. Still not happy with the calibration settings so work in progress. I suspect the uBITX needs LOT'S OF MIC AUDIO from what I'm hearing up here so keep that mic up close and personal.
Tom VE3THR

Re: show your mic

Lee
 

I am re-purposing an old microphone from 1944.  It is not from a telephone.  Any guesses?  The original carbon element was bad so I put in a electret mic and MAX9812 module board from eBay that costs a whopping $1.75.  I should not need to hold it so close to my mouth to get good audio.  Waiting for a new microphone cord to get here next week and I still need to finish my uBITX.

Re: heat sink upgrade #bitx40 #parts

Doug W
 

Tim
I think for anything other then very infrequent use at that cycle I would look for something with more mass.  You might get by but I couldn't guess for how long. 

Re: show your mic

Frank King
 

We had mics like that in the control tower at SLC when I started training as an airport traffic controller with the Civil Aeronautics Administration in 1950.

Frank King

AA7XA

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of Lee
Sent: Sunday, April 22, 2018 7:05 PM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic

 

I am in the process of re-purposing a very old microphone as you can see in they lower picture, FEB 1944.  A new microphone cable should be here next week.   The carbon element inside was bad so I went for a MAX9812 Microphone on a board for $1.75 on eBay.  This microphone was not from a telephone.  Any guesses?

Re: show your mic

Gordon Gibby
 

​fascinating old microhpone!!!




From: BITX20@groups.io <BITX20@groups.io> on behalf of Lee <mr.olson@...>
Sent: Sunday, April 22, 2018 10:04 PM
To: BITX20@groups.io
Subject: Re: [BITX20] show your mic
 
I am in the process of re-purposing a very old microphone as you can see in they lower picture, FEB 1944.  A new microphone cable should be here next week.   The carbon element inside was bad so I went for a MAX9812 Microphone on a board for $1.75 on eBay.  This microphone was not from a telephone.  Any guesses?

Re: Low Mic Gain, was, show your mic

MAX <max@...>
 

Thank you.  I’ll take a look.

 

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 Skip Davis via Groups.Io
Sent: Sunday, April 22, 2018 12:15 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Low Mic Gain, was, show your mic

 

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/

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

MAX <max@...>
 

I think something needs to be done.  As someone who is new to ubitx I have found information all over the www and when the information on one site conflicts with another there is no way to tell which one is correct.  I find it frustrating and I’ll bet other new members of the community feel the same way.

 

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 W7PEA
Sent: Sunday, April 22, 2018 12:26 PM
To: BITX20@groups.io
Subject: [BITX20] Ubitx.net site correction #ubitx-help #ubitx

 

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

Gordon Gibby
 

​yup, that's the way it is in a free nation.

this person says X and that person says Y

the  trick is to be willing to either read, test, or learn how to tell which is closer to the truth.


And in ham radio, this is how we build that "trained reservoir" of experts that Part 97.1 reasons for existence includes.....


So enjoy your frustration!


cheers,

gordon




From: BITX20@groups.io <BITX20@groups.io> on behalf of MAX <max@...>
Sent: Sunday, April 22, 2018 10:41 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Ubitx.net site correction #ubitx-help #ubitx
 

I think something needs to be done.  As someone who is new to ubitx I have found information all over the www and when the information on one site conflicts with another there is no way to tell which one is correct.  I find it frustrating and I’ll bet other new members of the community feel the same way.

 

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 W7PEA
Sent: Sunday, April 22, 2018 12:26 PM
To: BITX20@groups.io
Subject: [BITX20] Ubitx.net site correction #ubitx-help #ubitx

 

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

MAX <max@...>
 

I have bookmarked that page.  Maybe it will help.

 

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 Jerry Gaffke via Groups.Io
Sent: Sunday, April 22, 2018 1:25 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Ubitx.net site correction #ubitx-help #ubitx

 

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

MAX <max@...>
 

Thank you.

 

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 Jerry Gaffke via Groups.Io
Sent: Sunday, April 22, 2018 1:43 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Low Mic Gain, was, show your mic

 

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: Low mic gain, was, show your mic

MAX <max@...>
 

Interesting.  That picture has no indication as to which is positive and which is negative.  If I didn’t already know that the upper right connection was ground the picture would be useless.  I am probably offending some people but I’m about fed up.  All of the correct information needs to be gathered in one place.  Call it a manual or whatever you want but  someone who knows needs to take the time and put forth the effort to put it together.  And then all the incorrect information needs to be removed from the web. 

 

Not a happy camper.

 

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 1:57 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Low mic gain, was, show your mic

 

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