Date   

Re: BITX QSO Afternoon/Evening, Sunday, March 25, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

John P
 

I won't be able to get on this afternoon but should be on tonight. 
--
John - WA2FZW


Bitx20 I have completed the RF section and now doing the current test on transmit and recieve. #bitx20help

shytron
 

 I have completed the RF section and now doing the current test on transmit and receive. I get the 12 ma on receive but only 16 on transmit. Supposed to be 30. Is it because this jumper needs to be in for the test?
At the pads for the jumper that is to be installed later solder short wires to be used to clip on to with a
current meter. This test point will be used to set the bias current for the final output transistor,  You guys are inspiring. Thanks. James kc3cik



IRF510.
At the pads for "
 
 
IRF510.


Re: Cases

Gary Shriver
 

John,
They are about 2 months now.  So figure about April 27th

Gary


On Mar 25, 2018, at 8:42 AM, John AE5X <ae5x@...> wrote:

Dave - how long did it take to receive your kit? I ordered one for my uBITX on Feb 27 and trying to get an idea of when I might expect it.

Tnx/73
--
John AE5X

 


Re: UBITx muddy TX audio

Jerry Gaffke
 

I haven't messed with the CEC firmware yet.
I assume that "IF shift" is only affecting receive.

I suggest you return the IF shift to zero, then what your receive audio sounds like will be what your
transmit audio sounds like, they both get affected by the 12mhz crystal filter the same way.
Move the BFO till your receive audio is back to where it sounds good, and your transmit audio should then be good.

The receive only IF shift is to temporarily deal with a nearby interfering carrier, or perhaps some other operator
with a high squeaky voice.  Seldom used, but occasionally quite useful.

The BFO shift affects both transmit and receive.  The IF shift is actually actually a BFO shift
that only affects receive, just like RIT only affects receive tuning.  Maybe we should call IF shift 
something like rBFO instead?

The BFO is typically at 11.996500 mhz and is where zero hertz audio would come through.
The crystal filter only allows through something like 11.997000 to 11.999000 mhz, which is a range
of 500 to 2500 hz above the BFO, so the audio you hear is between 500 and 2500 hz.
Moving the BFO to 11.996800 mhz would move the audio you hear (and transmit) to between 200 and 2300 hz,
and might make it sound muddy.

Jerry, KE7ER


On Sun, Mar 25, 2018 at 08:36 am, Gary Shriver wrote:
I just got the uBitx on the air this week.  Running CEC firmware.  I have had comments that my audio sounds muddy.  No highs.  I find that running the IF shift at -600 makes the receive audio sound much more natural.  I have tried three different mics but all sound muddy.  The best sounding is the stock capsule.  I have even tried eq settings on a pre-amp.  Still no highs.  Would changing the BFO change TX audio quality?  Don’t want to totally mess things up.  Am I expecting too much?  Thanx for your help. 73-Gary


Re: Cases

John AE5X <ae5x@...>
 

Dave - how long did it take to receive your kit? I ordered one for my uBITX on Feb 27 and trying to get an idea of when I might expect it.

Tnx/73
--
John AE5X

 


UBITx muddy TX audio

Gary Shriver
 

I just got the uBitx on the air this week.  Running CEC firmware.  I have had comments that my audio sounds muddy.  No highs.  I find that running the IF shift at -600 makes the receive audio sound much more natural.  I have tried three different mics but all sound muddy.  The best sounding is the stock capsule.  I have even tried eq settings on a pre-amp.  Still no highs.  Would changing the BFO change TX audio quality?  Don’t want to totally mess things up.  Am I expecting too much?  Thanx for your help. 73-Gary


Re: kd8cec if shift

Vince Loschiavo
 

i would like to update my 1.06 to 1.061, but cannot find the link.  This is the only thing i've been having issues trying to follow Dr. Lee's updates.  Maybe a link to github for 1.061, because i found the 1.06 and previous..
Thanks
Vince
love the IF shift, keyer is pretty good too, as well as wspr..
de: n2aie 


Re: Fldigi with UBITX

Randy
 

So with a 4 wire fan you just have in on Max (ground blue wire) and this thermo switch turns it on/off?

You got pictures of the fan placement you're using?


Randy


Re: Fldigi with UBITX

_Dave_ AD0B
 

A bit of a subject drift but I have used these around the home for a temp monitor and either heating or cooling controller. 

https://www.banggood.com/DC-12V-50-to-110-Temperature-Control-Switch-Heat-Cool-Temp-p-933303.html?rmmds=search&cur_warehouse=CN


Re: kd8cec if shift

Dennis Voorhees
 

Thanks Ian, I will do so. I was very impressed with your step by step instructions for programming the Raduino. I had never programmed an arduino before. While it took a misstep or two, I got it done in not that much time. Everything I needed to know was step by step correct. Way too many times, I have run into instruction sets, that miss something the writer deems "understood". Yesterday, I worked about 10 contacts on 40 and 80 meters on the WPX contest. All gave me good reports. So I'm quite delighted with the whole project. 

On Sun, Mar 25, 2018 at 2:43 AM, Charudatt Uplap <charudattu@...> wrote:

Hello Ian,

 

What’s the meaning of this sentence “Added Si5351 module for WSPR”

 

Thanks for sharing your efforts

 

regards

charudatt – vu2upx

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of Ian Lee
Sent: Sunday, March 25, 2018 01:08
To: BITX20@groups.io
Subject: Re: [BITX20] kd8cec if shift

 

Dennis

 

Thanks for your feed back.

I just released uBITX Firmware CEC Version 1.061, It also includes uBITX Manager 1.01.

Starting with uBITX Manager 1.0, there is an option for setting IF Shift.

If you select 'Auto Save IF Shift Value', uBITX will be restored when you turn it on again.

 

Ian KD8CEC

 

2018-03-24 22:09 GMT+09:00 Dennis Voorhees <denny.voorhees@...>:

The other thing I've found is it makes listening a lot more pleasant. I shift mine about +700 hz and it really cuts the background hiss and improves the audio, on SSB. Is there a way to store that in Memory?  The CEC software upgrade is really nice. 

 

On Sat, Mar 24, 2018 at 8:54 AM, Paul Galburt - K2AYZ <galburt@...> wrote:

Which version did you load?

 

 


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



Re: more than you may want to know about designing an electret mic preamp

bobolink
 

Thanks Tim.
I think I’ll try to build that circuit with the OPA172.

Bob
wm6h


Re: kd8cec if shift

Dennis Voorhees
 

I downloaded whatever was the newest about 2 weeks ago. 


On Sat, Mar 24, 2018 at 11:09 AM, Tim Gorman <tgorman2@...> wrote:
On Sat, 24 Mar 2018 05:54:18 -0700
"Paul Galburt - K2AYZ" <galburt@...> wrote:

> Which version did you load?

1.04 from hamskey.com

tim ab0wr





Re: kd8cec if shift

Charudatt Uplap
 

Hello Ian,

 

What’s the meaning of this sentence “Added Si5351 module for WSPR”

 

Thanks for sharing your efforts

 

regards

charudatt – vu2upx

 

From: BITX20@groups.io <BITX20@groups.io> On Behalf Of Ian Lee
Sent: Sunday, March 25, 2018 01:08
To: BITX20@groups.io
Subject: Re: [BITX20] kd8cec if shift

 

Dennis

 

Thanks for your feed back.

I just released uBITX Firmware CEC Version 1.061, It also includes uBITX Manager 1.01.

Starting with uBITX Manager 1.0, there is an option for setting IF Shift.

If you select 'Auto Save IF Shift Value', uBITX will be restored when you turn it on again.

 

Ian KD8CEC

 

2018-03-24 22:09 GMT+09:00 Dennis Voorhees <denny.voorhees@...>:

The other thing I've found is it makes listening a lot more pleasant. I shift mine about +700 hz and it really cuts the background hiss and improves the audio, on SSB. Is there a way to store that in Memory?  The CEC software upgrade is really nice. 

 

On Sat, Mar 24, 2018 at 8:54 AM, Paul Galburt - K2AYZ <galburt@...> wrote:

Which version did you load?

 

 


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


Re: Custom Graphics help for S-Meter

K9HZ <bill@...>
 

Just gotta be a member to see it…

 

 

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com

Like us on Facebook! facebook icon

 

Moderator – North American QRO Yahoo Group.

 

email:  bill@...

 

 

From: BITX20@groups.io [mailto:BITX20@groups.io] On Behalf Of John P
Sent: Thursday, March 22, 2018 4:43 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Custom Graphics help for S-Meter

 

I totally screwed this post up trying to do it on my phone, so let me try again!

Vic, you might want to look at the SWR meter code in my software for the antenna analyzer over on the SoftwareControlledHamRadio group.

John - WA2FZW


Virus-free. www.avg.com


more than you may want to know about designing an electret mic preamp

Tim Gorman
 


Re: Low power output on ubitx #ubitx #ubitx-help

Mike R.
 

Hi Tim,
I did look at the outputs on my scope and they looked like nice even sine waves. Not an absolute measurement of course.
Using CEC's software I could go to 160M and look at that waveform. It was awful! No output filtering at all as the ubitx lowest filter is 3.5 - 5 Mhz. A lot of garbage in that waveform. Lots of power though. I'll have to go back and measure the power out on 160, it had to be in excess of 20W.
Mike W1USN


Re: Low power output on ubitx #ubitx #ubitx-help

Mike R.
 

Satish,
That is a good idea. At some point I'll look for a voltage booster to run the 510's at a higher voltage.
Thanks,
Mike


Re: uBITX Power Output OK

Tim Young
 

Tim:

I didn't as I don't have the test gear. Next step is to get connected to my existing station antenna (carolina windom) and see how it sounds on another receiver on SSB. Certainly not a deep technical approach. I am trying to make a go of it with a single power supply. I have a second uBITX that will be assembled for portable emcomm use after I am satisfied with the first one.

Tim

WB7UVH     

On 2018-03-24 18:53, Tim Gorman wrote:

Tim,

Did you check your signal on a spectrum analyzer? When I cranked up RV1
for maximum power output my 3rd order IMD fell pretty drastically.

I'm using 13v on the PA and 12.4v on the main board.

Based on your data for using 13.8v with the factory setting it might be
worth it for me to reset my power supply to 13.8v and use two dropping
diodes to take it down to 12.6v on the main board.

I've ordered a second ubitx and when it gets here I'm going to try
changing out all the driver transistors to see what happens to the
power output and the 3rd order IMD.

tim ab0wr

On Sat, 24 Mar 2018 13:58:25 -0700
"Tim Young" <tyoung@...> wrote:

The attached jpeg shows the results of testing (CW transmission) with
the out of the box RV1 setting and with RV1 set for maximum output.
Looks like the results are similar to what has been reported. My
primary interest is in 20M,40M and 80M emcomm QRP (bug out radio). I
was pleased with the power levels at 13.8VDC. I will be using a 12VDC
to 13.8VDC regulator to insure maximum voltage input at all times.

Tim
WB7UVH






kd8cec software

Mike Lichtman
 

Ian,
I join the group in saying thank you for all the work you put into the software. I have really enjoyed using the uBitx since I loaded your software.
I run Macs at home. Is there any possibility you will write a uBitx utility version for the Mac? Also are you thinking of adding an S meter to the display? 73 Mike KF6KXG


Re: uBITX Power Output OK

Tim Gorman
 

Tim,

Did you check your signal on a spectrum analyzer? When I cranked up RV1
for maximum power output my 3rd order IMD fell pretty drastically.

I'm using 13v on the PA and 12.4v on the main board.

Based on your data for using 13.8v with the factory setting it might be
worth it for me to reset my power supply to 13.8v and use two dropping
diodes to take it down to 12.6v on the main board.

I've ordered a second ubitx and when it gets here I'm going to try
changing out all the driver transistors to see what happens to the
power output and the 3rd order IMD.

tim ab0wr

On Sat, 24 Mar 2018 13:58:25 -0700
"Tim Young" <@tyoung> wrote:

The attached jpeg shows the results of testing (CW transmission) with
the out of the box RV1 setting and with RV1 set for maximum output.
Looks like the results are similar to what has been reported. My
primary interest is in 20M,40M and 80M emcomm QRP (bug out radio). I
was pleased with the power levels at 13.8VDC. I will be using a 12VDC
to 13.8VDC regulator to insure maximum voltage input at all times.

Tim
WB7UVH