Date   
Re: Adding uv meter .board and leads to ubitx

Bob Lunsford <nocrud222@...>
 

There are add-on amps but as a stopgap measure,
to use the radio until an amp is built and added, just
use an amplified computer speaker. I use one and
am satisfied to use just one channel. Has to be a
stereo set though or you short out one channel of
the rig's amplifier circuit for example if you plug in a
mono plug.

The computer speaker I use is turned up full volume
and all audio control is with the rig's control. Try it
to see if it's enough. Others here will no doubt give
you a website where you can either buy or build an
amp that can be installed inside the radio.

Bob — KK5R

--------------------------------------------

On Sat, 1/19/19, <will.benn@...> wrote:

Subject: [BITX20] Adding uv meter .board and leads to ubitx
To: BITX20@groups.io
Date: Saturday, January 19, 2019, 2:11 AM

Hi my name is Will put together
ubitx radio kit .Found the audio very low .can
 you suggest an add on amp .also bought uv meter
kit along with made up board  and leads as recommended
by F6HOY.the problem .I have no idea how to connect to the
main board of the radio.can any one help 73 Will

Re: Electret mic amp with AGC from Adafruit

Wayne Leake
 

 I'd like to try one of those AGC Mike preamps.
 I have a number of G.E. commercial mikes, some of which have a preamp built in.
 I don't think they are anything more than a 1 transistor preamp.
I need to find some of my G.E. service manuals and see what voltage is provided to the mikes. 
 Or set up one or two of the radios and check the voltages.
 One model called for an electret mike, but one I have wired for it has the preamp in it.
 I opened several to check.
 I also want to use an 8 pin plug and socket, same as is used on some Kenwoods, and a couple of other rigs.
 Don't know if the Heil gold line is just dynamic or what. Just that it worked on an HF Kenwood, and also on an 1 1/4 meter rig
 It has two elements, switchable.
 Other way would be to build a compressor setup I was looking at. Pretty sure it has AGC as well as compresion, which can be bypassed with a switch.
 YMMV
 Wayne WA2YNE
 I'm not really all there. I'm over here.

Re: Adding uv meter .board and leads to ubitx

Dave Dixon
 

Hi Will,
           I use an amplified stereo speaker on both on my version 3 and 4 ubitx radios the speaker is sold on ebay very cheaply and recharged via a usb lead supplied ive used this speaker for 2 years now and am very pleased with the results.Good luck on your search.Dave G0AYD.


On Sat, 19 Jan 2019 at 07:12, <will.benn@...> wrote:
Hi my name is Will put together ubitx radio kit .Found the audio very low .can  you suggest an add on amp .also bought uv meter kit along with made up board  and leads as recommended by F6HOY.the problem .I have no idea how to connect to the main board of the radio.can any one help 73 Will

Re: Electret mic amp with AGC from Adafruit

Bob Lunsford <nocrud222@...>
 

Here's a simple mic that cost $16. If you'd prefer to build
one, at least this may give you some ideas. Some places
will sell PVC tubing by the foot so it does not mean buying
an 8 ot 10 foot section when you only need a few inches.

Check it out...

http://www.qrpkits.com/microphone.html

Bob — KK5R

--------------------------------------------

On Sat, 1/19/19, Wayne Leake <wayneleake@...> wrote:

Subject: Re: [BITX20] Electret mic amp with AGC from Adafruit
To: BITX20@groups.io
Date: Saturday, January 19, 2019, 3:26 AM

 I'd like to try
one of those AGC Mike preamps.
 I have a
number of G.E. commercial mikes, some of which have a preamp
built in.
 I don't think they are
anything more than a 1 transistor preamp.
I
need to find some of my G.E. service manuals and see what
voltage is provided to the mikes.  Or set up one or two
of the radios and check the voltages.
 One
model called for an electret mike, but one I have wired for
it has the preamp in it. I opened several to
check. I also want to use an
8 pin plug and socket, same as is used on some Kenwoods, and
a couple of other rigs.
 Don't know if
the Heil gold line is just dynamic or what. Just that it
worked on an HF Kenwood, and also on an 1 1/4 meter rig
 It has two elements, switchable. Other way would be to
build a compressor setup I was looking at. Pretty sure it
has AGC as well as compresion, which can be bypassed with a
switch. YMMV Wayne WA2YNE I'm not really all
there. I'm over here.

Re: Replacing Heil Microphone electred elements

Bob Lunsford <nocrud222@...>
 

There are other websites with more info about replacing
the Heil or other electret elements but this one also has
some mic connector pin-outs. May be useful.

http://w2eny.com/heil_replacement/instructions.pdf

Bob — KK5R

--------------------------------------------

On Sat, 1/19/19, Wayne Leake <wayneleake@...> wrote:

Subject: Re: [BITX20] Electret mic amp with AGC from Adafruit
To: BITX20@groups.io
Date: Saturday, January 19, 2019, 3:26 AM

 I'd like to try
one of those AGC Mike preamps.
 I have a
number of G.E. commercial mikes, some of which have a preamp
built in.
 I don't think they are
anything more than a 1 transistor preamp.
I
need to find some of my G.E. service manuals and see what
voltage is provided to the mikes.  Or set up one or two
of the radios and check the voltages.
 One
model called for an electret mike, but one I have wired for
it has the preamp in it. I opened several to
check. I also want to use an
8 pin plug and socket, same as is used on some Kenwoods, and
a couple of other rigs.
 Don't know if
the Heil gold line is just dynamic or what. Just that it
worked on an HF Kenwood, and also on an 1 1/4 meter rig
 It has two elements, switchable. Other way would be to
build a compressor setup I was looking at. Pretty sure it
has AGC as well as compresion, which can be bypassed with a
switch. YMMV Wayne WA2YNE I'm not really all
there. I'm over here.

Re: Electret mic amp with AGC from Adafruit

Bob Lunsford <nocrud222@...>
 

Correction... I ssid the mic cost $16 but it is $15.

Bob — KK5R

--------------------------------------------

On Sat, 1/19/19, Bob Lunsford via Groups.Io <nocrud222=yahoo.com@groups.io> wrote:

Subject: Re: [BITX20] Electret mic amp with AGC from Adafruit
To: BITX20@groups.io
Date: Saturday, January 19, 2019, 6:52 AM

Here's a simple mic that cost $16. If you'd
prefer to build
one, at least this may give you some
ideas. Some places
will sell PVC tubing by the foot so it
does not mean buying
an 8 ot 10 foot section when you only
need a few inches.

Check it out...

http://www.qrpkits.com/microphone.html

Bob — KK5R

--------------------------------------------
On Sat, 1/19/19, Wayne Leake <wayneleake@...>
wrote:

Subject: Re: [BITX20] Electret mic amp
with AGC from Adafruit
To: BITX20@groups.io
Date: Saturday, January 19, 2019, 3:26
AM

 I'd like to try
one of those AGC Mike preamps.
 I have a
number of G.E. commercial mikes, some
of which have a preamp
built in.
 I don't think they are
anything more than a 1 transistor
preamp.
I
need to find some of my G.E. service
manuals and see what
voltage is provided to the
mikes.  Or set up one or two
of the radios and check the voltages.
 One
model called for an electret mike, but
one I have wired for
it has the preamp in it. I opened
several to
check. I also want to use an
8 pin plug and socket, same as is used
on some Kenwoods, and
a couple of other rigs.
 Don't know if
the Heil gold line is just dynamic or
what. Just that it
worked on an HF Kenwood, and also on
an 1 1/4 meter rig
 It has two elements,
switchable. Other way would be to
build a compressor setup I was looking
at. Pretty sure it
has AGC as well as compresion, which
can be bypassed with a
switch. YMMV Wayne WA2YNE I'm not
really all
there. I'm over here.

Re: CW operation on microBITX

Curt
 

Geoff

I suggest not changing firmware yet, until any bugs worked.

I have made dozens of qsos in default setting. Yes its different but it works. Note when you are key down there is a brief pause,  then action. The display changes to say CW. Now if your pause is long, it will revert to ssb, annoying so I try to not pause so long. Yes the length before this happens can be adjusted, but I found default the best.

Take time to determine hardware is working. Then consider the kd8cec upgrade, that many prefer for cw. Your rig may be okay. BTW I am using an audio filter for narrow receive. Its a nice rig but takes some operator adjustment.

Curt

Re: Adding uv meter .board and leads to ubitx

N5KBP
 

I picked up 5 of these for $8. Just take take the output from the wiper of the volume pot and feed it. works great.

https://smile.amazon.com/5V-12V-Amplifier-Module-Arduino-EK1236/dp/B01FDD3FYQ/ref=sr_1_3?s=electronics&ie=UTF8&qid=1547908101&sr=1-3&keywords=lm386
--
N5KBP

Re: Adding uv meter .board and leads to ubitx

Bill Cromwell
 

Hi Will,

There are several replies with good solutions for you. You can also use a set earphones and find that you will have to turn the volume down with those. I have been using "cans" for well over 60 years so I can hear my radio and not "annoy" everybody else in the house. CW is music to only a few of us:) I have also just plugged in the computer external amplifier/speaker sets and those work fine.

I can't help you with the uv meter (an S-meter I presume). S-meters are not needed and I have several radios with no S-meter nor AGC. Others here can help you with that.

73,

Bill KU8H

On 1/19/19 2:11 AM, will.benn@... wrote:
Hi my name is Will put together ubitx radio kit .Found the audio very low .can  you suggest an add on amp .also bought uv meter kit along with made up board  and leads as recommended by F6HOY.the problem .I have no idea how to connect to the main board of the radio.can any one help 73 Will
_._,_._,_
--
bark less - wag more

Re: CW operation on microBITX

iz oos
 

I have ver. 3 without any firmware update. I had initially a trouble where cw was sent incorrectly even with my laptop and the homemade optoisolated interface I use for contests. After tinkering quite a bit I found a kit by wb9kzy, the island keyboard with the output for tube transmitters that works perfectly. The output of that kit contains a solid state relay and I think this makes the trick. Maybe a regular relay which is cheaper (but noisier) could be used as well, I may try it. The relay might assure a clean contact. If you opt for the relay solution please let me know whether it works for you.


Il 19/gen/2019 13:21, "Curt via Groups.Io" <wb8yyy=yahoo.com@groups.io> ha scritto:
Geoff

I suggest not changing firmware yet, until any bugs worked.

I have made dozens of qsos in default setting. Yes its different but it works. Note when you are key down there is a brief pause,  then action. The display changes to say CW. Now if your pause is long, it will revert to ssb, annoying so I try to not pause so long. Yes the length before this happens can be adjusted, but I found default the best.

Take time to determine hardware is working. Then consider the kd8cec upgrade, that many prefer for cw. Your rig may be okay. BTW I am using an audio filter for narrow receive. Its a nice rig but takes some operator adjustment.

Curt

JackAl Software Ready for Download

Jack, W8TEE
 

All:

The source code for JackAl is now available for download at our web site, hamradiodesigns.com. I apologize for the delay and that delay is totally on me. Al had his work done months ago. In my defense, it not easy to get 11,000+ lines of C/C++ code to play nice with each other. That said, we think the final result is worth the wait, with features we think everyone will appreciate.

Some details:


There are multiple files in the project. Only one file has a secondary file name of INO. This file contains the setup() and loop() functions and, therefore, all program control elements start in the INO file. All other files are CPP (i.e., C++) files. While this is different than some of you are used to, it brings two advantages to the party: 1) it allows for type checking across files, and 2) it allows for incremental compiles. This second feature can be a real time saver. Instead of compiling almost 400K of source code spread out over 19 files, incremental compiling causes the IDE to only compile those files that have been changed since the last compile.

Line number 4 in the JackAl.h header file contains this line:

  #define DEBUG

In setup(), you'll see

    #ifdef DEBUG

    Serial.begin(115200);

 #endif

In a few places you will also find:

   #ifdef DEBUG

   Serial.print(“x = “);

   Serial.println(x);

 #endif

If you leave line 4 in the header file unchanged, the Serial object is compiled into the code which can be useful for debugging, like the Serial.print() lines above. If you comment out line 4, the Serial object is NOT compiled into your program, and all of the subsequent debug print statements are also not compiled into the program. This technique is called “scaffolding” and it allows you to “remove” debug statements without actually removing them from the code. Because you don't have to retype your debug statements in the highly unlikely event your changes have a bug in them. This can be a real timesaver. You decide what to do with line 4.

Even if you've never programmed, you will eventually get tired of seeing Al's and my names on the Splash screen. The Splash() function is in the INO file and feel free to change it to your own name and call. Note if you want to change something, you must have installed the Arduino IDE and the Teensyduino patch. Details are in manuals.

This code is Open Source, as is the hardware. This is an experimenters platform and we hope you will do just that. That said, we ask that you leave the file header comments unchanged and at the top of the file. Feel free to add whatever you wish after our comments.

There is a JackAl group now (https://groups.io/g/JackAl) and all comments, questions, and support will be done via that Forum. Please check the site from time-to-time, as we know we want to improve a number of things in the software.


Jack, W8TEE

Al, AC8GY


Your experience with µBITX on 10 meters #ubitx

FC
 

Hello.

I see that the µBITX 3 MHz to 30 MHz. How many watts can one expect on 10 meters? For those that have used it in 10 meters, how did it perform?

Re: Your experience with µBITX on 10 meters #ubitx

iz oos
 

It depends on the versions. Latest production should have more power on the 10m band. My ubitx, ver. 3 early production, has nearly 2w.


Il 19/gen/2019 22:40, "FC" <felixc64+groups.io@...> ha scritto:
Hello.

I see that the µBITX 3 MHz to 30 MHz. How many watts can one expect on 10 meters? For those that have used it in 10 meters, how did it perform?

Re: Your experience with µBITX on 10 meters #ubitx

Timothy Fidler
 

FelixC (felix the cat ?) before you give up on the two watt miserable output perhaps have a look at 

http://ubitx.net/category/hardware/linear-amp/page/2/  and the work by Bill S and  Erhart DE3FY did.

Bill changed out the  Mosfets and did rebiasing and got of order 6W on the 10m Band whereas Erhart did a complete rebuild of the PA and ... well - you read the claims.  (You'd want to have a get out of gaol strategy if you go the clip it off and throw it way method that   Bill used - albeit that reduces the risk to the PCB,  which part cannot be replaced cheaply.)
The cheapest place to get hopefully genuine RD16HH  mosfets in the known universe (small qty) is Cecil the parts Place in the US and he does sell some pig nose ferrite magnetics too (of the types required ).  The absolute minimum you will spend is about $15 USD including postage, plus your labour and more for the Erhart Mods. 

Re: Your experience with µBITX on 10 meters #ubitx

Curt
 

My own ubitx is outputting from 10w on 160m descending to around 4w on 10m CW. Actual power output on SSB depends upon the microphone used. An improved layout using the same irf510 has been designed for the upcoming QSX. While 10w is better, note this is about half a S unit, not huge.

Others are biasing their PA in the ubitx at 28 volts, but not sure if they are getting a large boost on 10m.

Of course value of irf510 is the low replacement cost.

Curt

Re: spurs & harmonics, whew!

Kees T
 

I'm interested in V3 and V4 rework...........

I understand Allison's approach to wiring the LPF relays, leaving the 10M LPF in series (not a problem), and requiring a small modification of the Arduino code. 

For the V3 and V4 boards why not pull the 3 relays, add connector pins in their locations (2 rows of pins per relay with appropriate pins pulled), and add a small daughter board with the same 3 relays wired per Allison's suggestion ? Use the existing LPF components on the uBITX board.

What happened to the Axicom relay fix ?  ....I haven't read the reflector for a while.

73 Kees K5BCQ

UBITX for sale

Tom Frobase
 

I have a UBITX complete kit un-assembled that is excess to my needs.
I also have a nice Tentech case for it. I will sell the two for $115
post paid CONUS. If you have an interest contact me off the list,
thank you ... tom, N3LLL

Re: Your experience with µBITX on 10 meters #ubitx

FC
 

FelixC (felix the cat ?)
you guessed it!
:)

Re: Your experience with µBITX on 10 meters #ubitx

FC
 

Thank you all for the info. I'll take a look at the suggested mods http://ubitx.net/category/hardware/linear-amp/page/2/ and keep an eye on the QSX

Audio problem in my ubitx

Avijit
 

Hello,
I have assembled my Ubitx yesterday but I am not getting any audio. Here are the details :
1. No audio coming out on speaker as well as headphones.
2. When I am turning the volume control to the full only a screeching sound is emanating.
3. Tried with another volume pot but no difference.
4. When i am connecting the cw key occasional cw tone is heard very faintly but nothing happens with pressing the key.
5. No rf power is visible on the meter when key is pressed.

Please help. 
Thanks and regards 
Avijit