Date   
Re: top band ubitx

bill richardson
 

I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening...

On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote:

Bill:

I think what you are seeing is the "normal" variation in the
output of the MOSFETS. Some are better than others at RF.

Gordon's suggestion to turn back the drive is probably the right answer.
Alternatively, you could turn down the gate voltage a bit, but that
would probably introduce compression distortion. Or you could increase
the size of the heat-sink and see how it goes. Probably the wisest thing
to do is both turn back the drive a bit and increase the heat-sink.

Some, but not all, IRF510's are capable of 20W or more on 80m.
you might happen to have some good ones. The key lies in the
harmonic generation and the heat-sinking.

Note that what you are seeing MAY be from UHF oscillation included in
the signal. Be very aware of that. Check your output very carefully.

john
AD5YE


Re: pointer needed raduino

LKNDAVE
 

OK guys, my bad on Allards raduino sketch. 
after a nap and some diligence i realized i did not have the Pinchange library installed.
this is the first time i have ever seen a library installed anywhere other than the top few lines of code. my error was on line 125. oops there is a #include <PinChangeInterrupt.h> declaration.
i added library and walla it compiled.
#include <happydance.h>
problem solved, lessons learned on this sketch.
thanks for being here to everyone.
dave, N4LKIN
73

still dont kinow whats up with which si5351 library to use. different day maybe

Re: pointer needed raduino

Jerry Gaffke
 

No need to add a library for si5351 support when using Allard's Bitx40 code
that is version 1.20 and beyond (including all of the 2.* releases, and Farhan's uBitx code)
The si5351 support is compiled inline, search for "si5351bx" in the source if curious.

Jerry, KE7ER


On Tue, Feb 6, 2018 at 04:43 pm, LKNDAVE wrote:
still dont kinow whats up with which si5351 library to use. different day maybe

Re: top band ubitx

bill richardson
 

Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe.

On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote:

I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening...
On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote:

Bill:

I think what you are seeing is the "normal" variation in the
output of the MOSFETS. Some are better than others at RF.

Gordon's suggestion to turn back the drive is probably the right answer.
Alternatively, you could turn down the gate voltage a bit, but that
would probably introduce compression distortion. Or you could increase
the size of the heat-sink and see how it goes. Probably the wisest thing
to do is both turn back the drive a bit and increase the heat-sink.

Some, but not all, IRF510's are capable of 20W or more on 80m.
you might happen to have some good ones. The key lies in the
harmonic generation and the heat-sinking.

Note that what you are seeing MAY be from UHF oscillation included in
the signal. Be very aware of that. Check your output very carefully.

john
AD5YE



Re: uBITX wiki

Roy Appleton
 

Thanks guys!

Roy
WA0YMH

On Feb 6, 2018 3:00 PM, "KD8CGH" <rkayakr@...> wrote:
It's the Wiki link on the bottom of the left hand side list of links on every groups.io page.
Click uBitx, then mods or software

    Bob
        KD8CGH

Re: uBITX Firmware (CEC) 0.30 released (Test version). #ubitx

Ian Lee
 

David

Thanks for very important information.
that is my mistake.
i plan release version 1.0 from version 0.35 with fixed it.

Thanks again, David.

Ian KD8CEC

2018-02-07 7:49 GMT+09:00 David S via Groups.Io <dcsuk10@...>:

Ian

Now on version 0.35, another great increase in flexibility, thanks, I been trying the memory function, storing the FT8 frequencies, a small wrinkle, whilst the correct frequency is recovered from memory the stored sideband is not.  If USB iis set from the memory manager LSB is always restored, if the memory is set from the rig USB is only restored for frequencies above 10 MHz..

best regards

David S

G8DJM



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

Re: top band ubitx

Vince Vielhaber
 

What are you using for an antenna?

Vince.

On 02/06/2018 08:06 PM, bill richardson wrote:
Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe.
On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote:

I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening...
On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote:

Bill:

I think what you are seeing is the "normal" variation in the
output of the MOSFETS. Some are better than others at RF.

Gordon's suggestion to turn back the drive is probably the right answer.
Alternatively, you could turn down the gate voltage a bit, but that
would probably introduce compression distortion. Or you could increase
the size of the heat-sink and see how it goes. Probably the wisest thing
to do is both turn back the drive a bit and increase the heat-sink.

Some, but not all, IRF510's are capable of 20W or more on 80m.
you might happen to have some good ones. The key lies in the
harmonic generation and the heat-sinking.

Note that what you are seeing MAY be from UHF oscillation included in
the signal. Be very aware of that. Check your output very carefully.

john
AD5YE



uBITX: Add a keypad

kb1oiq@...
 

Hi Everybody,

I just uploaded a file which describes a hardware and software modification to the uBITX to interface a resistive keypad.  See kb1oiq_ubitx_keypad.pdf if interested.

Enjoy!

Thanks, and 73,

Andy
KB1OIQ

Mic element

 

Hey all thought I would post a new element I have been playing with,  had some good audio reports with this one after some testing I have decided to keep it.

JLI Electronics


--
David

 N8DAH
Kit-Projects.com

Audio in speakers during Tx

Praba Karan
 

I am using external speakers. During Tx, it picks transmitted audio.
Any remedies ?

Re: Audio in speakers during Tx

Praba Karan
 

This issue is from microbitx

Re: top band ubitx

bill richardson
 

160m doublet feed with 450 ohm line.

On Feb 6, 2018, at 9:23 PM, Vince Vielhaber <vev@...> wrote:

What are you using for an antenna?

Vince.


On 02/06/2018 08:06 PM, bill richardson wrote:
Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe.
On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote:

I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening...
On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote:

Bill:

I think what you are seeing is the "normal" variation in the
output of the MOSFETS. Some are better than others at RF.

Gordon's suggestion to turn back the drive is probably the right answer.
Alternatively, you could turn down the gate voltage a bit, but that
would probably introduce compression distortion. Or you could increase
the size of the heat-sink and see how it goes. Probably the wisest thing
to do is both turn back the drive a bit and increase the heat-sink.

Some, but not all, IRF510's are capable of 20W or more on 80m.
you might happen to have some good ones. The key lies in the
harmonic generation and the heat-sinking.

Note that what you are seeing MAY be from UHF oscillation included in
the signal. Be very aware of that. Check your output very carefully.

john
AD5YE



--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.metalworkingfun.com


Re: Audio in speakers during Tx

MVS Sarma
 

Is it external speaker or external amplispeaker?


Regards
MVS Sarma
 

On Wed, Feb 7, 2018 at 5:05 PM, Praba Karan <vu3dxr@...> wrote:
This issue is from microbitx


Re: Audio in speakers during Tx

Praba Karan
 

external amplispeaker...
i heard audio even volume down bottom.

Virus-free. www.avast.com

On Wed, Feb 7, 2018 at 6:18 PM, Mvs Sarma <mvssarma@...> wrote:
Is it external speaker or external amplispeaker?


Regards
MVS Sarma
 

On Wed, Feb 7, 2018 at 5:05 PM, Praba Karan <vu3dxr@...> wrote:
This issue is from microbitx





--
D.Prabakaran 
VU3DXR

CAT Support uBITX Firmware CEC Version 1.0 Release #ubitx

Ian Lee
 

all
I wanted to do a simple hardware modification, so I early to finished firmware develop.
also almost no space left for the programming, I am going to work on fixing bugs.
This version of the concept is an upgrade without hardware modifications. No hardware modifications are required to use this firmware.



1.Cat communication support. (fldigi, wsjtx, hamradio delux, rpi... more)
2.New Frequency Tune method (threshold applied)
3.Ham band applied (can change general mode)
   (you can select region and adjust ham band by uBITX Manager)
4.CW Keying Change (Ron's code)
5.Key ADC Range adjust by uBITX Manager
6.Split (just VFOA/VOFB)
7.Channel Memory (20 Channels, 10 Channel has Tag (Name) by uBITX Manager)
8.TX Control (Many countries are imposing sanctions on transmittable frequencies.)
   This feature allows uBITX to be used in most countries.
9.Dual VFO Dial lock
10.IF Shift
11.Built in memory keyer (Auto key, CW Text input by uBITX Manager)
    I put a lot of funny features but I could not introduce them.
    For example, Hold during automatic transmission, and the ability to transmit manually and automatically transmit again.
    The ability to select and schedule other text by turning the dial during automatic transmission. more...
   
12.CW Mode (Just set the BFO for CW)
and more...

If you are interested, please refer to the link below. I posted a brief introduction and installation instructions.
There is always a source in the github repository that I am working on.
http://www.hamskey.com

Most of the features are easy to use, but we'll post them on our blogs and youtube for features that require clarification.
https://www.youtube.com/watch?v=9aqkQVioslk

Farhan, who made a very good transceiver, software and playground, and Ron, who improved cw keying, And my best thanks are those who have provided advice, tests and ideas.
(Perhaps somebody is still looking for a bug in the firmware or a feature to add.)

I am going to do some interesting hardware modifications. I'll have to buy a resistor to add a switch.
i will introduce another version that comes with hardware modifications.
-- 
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

Re: Audio in speakers during Tx

MVS Sarma
 

i imagine that Prabha jee
 Pleace a 01.1uF capacitor on ech channel, at the middle pin of Violume control to ground. It would byepass the RF induced in the speaker connecting cable.
  Aduio would disappear.
All the best
 sarma
 vu3zmv

Regards
MVS Sarma
 

On Wed, Feb 7, 2018 at 7:00 PM, Praba Karan <vu3dxr@...> wrote:
external amplispeaker...
i heard audio even volume down bottom.

Virus-free. www.avast.com

On Wed, Feb 7, 2018 at 6:18 PM, Mvs Sarma <mvssarma@...> wrote:
Is it external speaker or external amplispeaker?


Regards
MVS Sarma
 

On Wed, Feb 7, 2018 at 5:05 PM, Praba Karan <vu3dxr@...> wrote:
This issue is from microbitx





--
D.Prabakaran 
VU3DXR


Re: W0EB/W2CTX Latest uBITX software release #ubitx

Mitani Masaru
 

Thank you Release New Version.
CW keying on MIC PTT is nice.(Impliments mine onto Ver.1)

I'm modified TX HAM BAND ONLY to function:void Check_Transmit(void).
It's need Japan Radio reguration.
and... Reg.1/2 must 40m BAND limits below 7200kHz,change BAND DATA.

de JE4SMQ masa

Re: Audio in speakers during Tx

Michael Hagen
 

Might try looping lead (leads?) to amp thru a ferrite, or get the split clamp on ones, close to were it goes in the amp?

Wrap up in a coil any extra length of the cable.  Makes a common mode choke.

As Sarma says, maybe a 100 - 1000 pF bypass on each input?

73's

Mike, WA6ISP


On 2/7/2018 6:45 AM, Mvs Sarma wrote:
i imagine that Prabha jee
 Pleace a 01.1uF capacitor on ech channel, at the middle pin of Violume control to ground. It would byepass the RF induced in the speaker connecting cable.
  Aduio would disappear.
All the best
 sarma
 vu3zmv

Regards
MVS Sarma
 

On Wed, Feb 7, 2018 at 7:00 PM, Praba Karan <vu3dxr@...> wrote:
external amplispeaker...
i heard audio even volume down bottom.

Virus-free. www.avast.com

On Wed, Feb 7, 2018 at 6:18 PM, Mvs Sarma <mvssarma@...> wrote:
Is it external speaker or external amplispeaker?


Regards
MVS Sarma
 

On Wed, Feb 7, 2018 at 5:05 PM, Praba Karan <vu3dxr@...> wrote:
This issue is from microbitx




--
D.Prabakaran 
VU3DXR



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

Re: uBITX drive level.. #ubitx

Andre Berwald
 

Hi,

I can confirm that the above fix (Mr. Kang) works :-)

Yesterday i changed the value of R65 to 4K7 and the value of R63 to 10 Ohm.
I used 1206 components (desolderd from scrap prints).

I now have, on normal voice volume, 10 watt's out on 20m.
RV1 is turned counter clockwise for about 75%.

I use a Baofeng microphone.

73 's André PA3EIV

Re: uBITX drive level.. #ubitx

Rob Snow
 

Thank you for the information.  Just to be clear, the changes from Mr. Kang have fixed your PA drive level with using the IRF510s?  No other changes?  Have you checked on 10m?

-Rob