Date   
Re: #Antuino: an update and a bit of bad news for those bought it at FDIM-2019

Ashhar Farhan
 

You are right. It is a typo.


On Sun 28 Jul, 2019, 7:22 AM ohwenzelph via Groups.Io, <Ohwenzelph=yahoo.com@groups.io> wrote:
In the picture it looks like #8 points to probably Q3 

Re: FYI: Time Stations

Jeffrey Benedict
 

CHU is on 3.3, 7.85 and 14.67 Mhz
--
Jeff, K7AIL  CN87

raoul@...

Re: calibrating ubitx to www

Tom, wb6b
 

On Sat, Jul 27, 2019 at 09:35 AM, <terryhugheskirkcudbrifght@...> wrote:
are you using kd8cec firmware or the original
Currently I use an older version of the CEC firmware, just before the Nextion display support was added. 

I originally calibrated my uBITX with the factory firmware. I believe I did some additional calibrations by changing values with the CEC firmware or the "Memory Manager" utility. But that was long enough ago that I don't recall exactly.

Tom, wb6b

Re: FYI: Time Stations

Wayne Leake
 

back in the 1950's, I used to receive CHU on 7.85Mhz, as well as 2.5Mhz, 5.0Mhz 10.0Mhz and maybe higher WWV signals.
 I lived in Syracuse NY at the time, and used a wire antenna, with a very old,but still good Philco Model 620.
 The Philco was a good Superhet multi band, with RF amp as well as mixer, IF amp, diode detector, plus triode audio amp and pentode audio output.
 Was AM only,so I could not listen to SSB, and CW was not my thing.
 Regardless, I was able to set my watch and clock by either CHU or WWV
 Wayne WA2YNE

Re: FYI: Time Stations

Buddy Brannan
 

CHU used to be on 7335, not 7850, didn’t it? Can’t recall which other of their transmissions moved, if any, but I do recall there being a bit of uproar when they were proposing eliminating 7335.


Buddy Brannan, KB5ELV - Erie, PA
Email: buddy@...
Mobile: (814) 431-0962

On Jul 28, 2019, at 12:20 AM, Wayne Leake <wayneleake@...> wrote:

back in the 1950's, I used to receive CHU on 7.85Mhz, as well as 2.5Mhz, 5.0Mhz 10.0Mhz and maybe higher WWV signals.
I lived in Syracuse NY at the time, and used a wire antenna, with a very old,but still good Philco Model 620.
The Philco was a good Superhet multi band, with RF amp as well as mixer, IF amp, diode detector, plus triode audio amp and pentode audio output.
Was AM only,so I could not listen to SSB, and CW was not my thing.
Regardless, I was able to set my watch and clock by either CHU or WWV
Wayne WA2YNE

uBitx V5 and JS8Call - Losing tx power on long transmissions. #js8call #v5 #ubitx

Jimmy Capizzi
 

Hello.

I am working portable with a uBitx, and a Linux laptop for the first time today, everything seemed fine, but my first qso, when sending my info, 3 min transmission, I was watching the meter and the power dropped down to almost nothing 3/4 though the tx. My receiving station, KB9HP, was unable to decode the entire message.

Any idea what's going on? Are my finals going bad already? 

Any feedback would be really appreciated.

Jimmy
K3CHB

Re: uBitx V5 and JS8Call - Losing tx power on long transmissions. #js8call #v5 #ubitx

Jakobus van der Merwe
 

On the face of what you said, I would say, keep a eye on the supply power if you transmit. if it stays constant or drop slightly, then your power supply is fine. If it drops slowly and quite a lot. Then your power supply is not up to its task. A supply that output higher amps should be used. If the power supply is ok. Then it is the final transistors getting hot. The efficiency will drop. Remedy here will be to use bigger heatsinks on them and even use a fan to cool things down. This is a classical simptome of overloading on a power supply or no sufficient heatsinking on the transistors. Do not carry on till you fixed the problem. Because either the power supply or transistors will go on retirement eventually.

J van der Merwe

On Sun, 28 Jul 2019, 08:42 Jimmy Capizzi <thechubb16@...> wrote:
Hello.

I am working portable with a uBitx, and a Linux laptop for the first time today, everything seemed fine, but my first qso, when sending my info, 3 min transmission, I was watching the meter and the power dropped down to almost nothing 3/4 though the tx. My receiving station, KB9HP, was unable to decode the entire message.

Any idea what's going on? Are my finals going bad already? 

Any feedback would be really appreciated.

Jimmy
K3CHB

Re: uBitx V5 and JS8Call - Losing tx power on long transmissions. #js8call #v5 #ubitx

 

Jimmy,

Your finals are getting too hot. Put them on a bigger heat sink.

You should notice that after it cools down the power will be back.

Raj

At 28-07-19, you wrote:
Hello.

I am working portable with a uBitx, and a Linux laptop for the first time today, everything seemed fine, but my first qso, when sending my info, 3 min transmission, I was watching the meter and the power dropped down to almost nothing 3/4 though the tx. My receiving station, KB9HP, was unable to decode the entire message.

Any idea what's going on? Are my finals going bad already?

Any feedback would be really appreciated.

Jimmy
K3CHB

Antuino frequency range

iz oos
 

I understand it is meant mainly for HF, but what is its usable frequency range? Is it usable at 6m, 2m and 70cm?

Re: FYI: Time Stations

Jim
 

2009 they moved from 7335 to 7850.

Re: Antuino frequency range

Ashhar Farhan
 

It is entirely usable with good accuracy to 150 Mhz. The 400 to 450 mhz is good enough, but not accurrate. That is, you will be able to measure relative gain/loss of devices and cables, swr indication with +/- 1 db, but dont look for accurate measurements at 400 mhz.


On Sun 28 Jul, 2019, 2:14 PM iz oos, <and2oosiz2@...> wrote:

I understand it is meant mainly for HF, but what is its usable frequency range? Is it usable at 6m, 2m and 70cm?

Re: #Antuino: an update and a bit of bad news for those bought it at FDIM-2019

f1mqj
 

Just some questions :
1 - why taking a si5351 which makes square waveform, despite a Ad9851 which makes sinus (less to no harmonic) as made on F4GOH and RA4NAL ?
https://hamprojects.wordpress.com/2015/06/21/hf-arduino-vna/
I know it is the DDS of Bitx and uBitx so easy to go on, but the square wave could be more a problem for VNA (and the cost doesn't seem to be very different)
2 - How many memory points do antuino record ? because that's the main difference between VNA able to be wideband
3 - is it compatible with DL2SBA software (if it'is of some interest) ?
Thanks in advance for answers that might be of interest to be put in the description (especialy 2 and 3)
best 73 - Remi

Re: #Antuino: an update and a bit of bad news for those bought it at FDIM-2019

Ashhar Farhan
 

Remi,
The Si5351 is used because it goes all the way to 200 mhz and this design calls for three clocka.  It doesnt have any spurs. The square waves are not a problem as filter the required signal through six pols of crystal filters.
- f

On Sun 28 Jul, 2019, 3:43 PM f1mqj, <f1mqj.fr@...> wrote:
Just some questions :
1 - why taking a si5351 which makes square waveform, despite a Ad9851 which makes sinus (less to no harmonic) as made on F4GOH and RA4NAL ?
https://hamprojects.wordpress.com/2015/06/21/hf-arduino-vna/
I know it is the DDS of Bitx and uBitx so easy to go on, but the square wave could be more a problem for VNA (and the cost doesn't seem to be very different)
2 - How many memory points do antuino record ? because that's the main difference between VNA able to be wideband
3 - is it compatible with DL2SBA software (if it'is of some interest) ?
Thanks in advance for answers that might be of interest to be put in the description (especialy 2 and 3)
best 73 - Remi

Re: FYI: Time Stations

Wayne Leake
 

I think you are correct that CHU used to be maybe 7.335Mhz.
 I know I listened to it closer to the 40meter band way back.
 Been so long since I listened to it.
Wayne WA2YNE



Re: FYI: Time Stations

Gordon Gibby <ggibby@...>
 

moved in 2009 according to wikipedia. lower sideband suppressed. 10kW on 7.85. I've used them several times.


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Buddy Brannan <buddy@...>
Sent: Sunday, July 28, 2019 12:28 AM
To: BITX20@groups.io
Subject: Re: [BITX20] FYI: Time Stations

CHU used to be on 7335, not 7850, didn’t it? Can’t recall which other of their transmissions moved, if any, but I do recall there being a bit of uproar when they were proposing eliminating 7335.


Buddy Brannan, KB5ELV - Erie, PA
Email: buddy@...
Mobile: (814) 431-0962



On Jul 28, 2019, at 12:20 AM, Wayne Leake <wayneleake@...> wrote:

back in the 1950's, I used to receive CHU on 7.85Mhz, as well as 2.5Mhz, 5.0Mhz 10.0Mhz and maybe higher WWV signals.
I lived in Syracuse NY at the time, and used a wire antenna, with a very old,but still good Philco Model 620.
The Philco was a good Superhet multi band, with RF amp as well as mixer, IF amp, diode detector, plus triode audio amp and pentode audio output.
Was AM only,so I could not listen to SSB, and CW was not my thing.
Regardless, I was able to set my watch and clock by either CHU or WWV
Wayne WA2YNE

Re: uBitx V5 and JS8Call - Losing tx power on long transmissions. #js8call #v5 #ubitx

Gordon Gibby <ggibby@...>
 

​Perhaps you're overheating those finals or clobbering your battery.... you might feel the heatsinks, and reduce the power a tad.   3 minutes is a lOOOOOOnG time to transmit.      


if the trnsmitter works fine at the start of the NEXT transmission....no harm done.

Gordon



From: BITX20@groups.io <BITX20@groups.io> on behalf of Jimmy Capizzi <thechubb16@...>
Sent: Sunday, July 28, 2019 2:42 AM
To: BITX20@groups.io
Subject: [BITX20] uBitx V5 and JS8Call - Losing tx power on long transmissions. #ubitx #js8call #v5
 
Hello.

I am working portable with a uBitx, and a Linux laptop for the first time today, everything seemed fine, but my first qso, when sending my info, 3 min transmission, I was watching the meter and the power dropped down to almost nothing 3/4 though the tx. My receiving station, KB9HP, was unable to decode the entire message.

Any idea what's going on? Are my finals going bad already? 

Any feedback would be really appreciated.

Jimmy
K3CHB

Re: uBitx V5 and JS8Call - Losing tx power on long transmissions. #js8call #v5 #ubitx

MVS Sarma
 

I replaced the heat sinks with a single strip heat sink with suitable insulating kits. Now they run cool.
it is 1.25" height , 4" long and 0.3" thick.
You  may also try.

regards
sarma
 vu3zmv


On Sun, Jul 28, 2019 at 5:36 PM Gordon Gibby <ggibby@...> wrote:

​Perhaps you're overheating those finals or clobbering your battery.... you might feel the heatsinks, and reduce the power a tad.   3 minutes is a lOOOOOOnG time to transmit.      


if the trnsmitter works fine at the start of the NEXT transmission....no harm done.

Gordon



From: BITX20@groups.io <BITX20@groups.io> on behalf of Jimmy Capizzi <thechubb16@...>
Sent: Sunday, July 28, 2019 2:42 AM
To: BITX20@groups.io
Subject: [BITX20] uBitx V5 and JS8Call - Losing tx power on long transmissions. #ubitx #js8call #v5
 
Hello.

I am working portable with a uBitx, and a Linux laptop for the first time today, everything seemed fine, but my first qso, when sending my info, 3 min transmission, I was watching the meter and the power dropped down to almost nothing 3/4 though the tx. My receiving station, KB9HP, was unable to decode the entire message.

Any idea what's going on? Are my finals going bad already? 

Any feedback would be really appreciated.

Jimmy
K3CHB

Re: Antuino frequency range

iz oos
 

That's interesting! Am looking forward to becoming an addicted Antuino user :)

Il 28/lug/2019 11:21, "Ashhar Farhan" <farhanbox@...> ha scritto:
>
> It is entirely usable with good accuracy to 150 Mhz. The 400 to 450 mhz is good enough, but not accurrate. That is, you will be able to measure relative gain/loss of devices and cables, swr indication with +/- 1 db, but dont look for accurate measurements at 400 mhz.
>
> On Sun 28 Jul, 2019, 2:14 PM iz oos, <and2oosiz2@...> wrote:
>>
>> I understand it is meant mainly for HF, but what is its usable frequency range? Is it usable at 6m, 2m and 70cm?
>

Re: FYI: Time Stations

David McGaw
 

To confirm, CHU is 3.330, 7.850 and 14.670, easily heard in the East. 
They moved to 7.85 from 7.335 when the world frequency allocations were
changed to allow SW broadcast on their frequency and a religious station
put a powerhouse signal right on top of them.  BTW, I use USB SSB to
receive them, which gives lower noise than AM.

David N1HAC

On 7/28/19 8:04 AM, Gordon Gibby via Groups.Io wrote:
moved in 2009 according to wikipedia. lower sideband suppressed. 10kW on 7.85. I've used them several times.


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Buddy Brannan <buddy@...>
Sent: Sunday, July 28, 2019 12:28 AM
To: BITX20@groups.io
Subject: Re: [BITX20] FYI: Time Stations

CHU used to be on 7335, not 7850, didn’t it? Can’t recall which other of their transmissions moved, if any, but I do recall there being a bit of uproar when they were proposing eliminating 7335.


Buddy Brannan, KB5ELV - Erie, PA
Email: buddy@...
Mobile: (814) 431-0962



On Jul 28, 2019, at 12:20 AM, Wayne Leake <wayneleake@...> wrote:

back in the 1950's, I used to receive CHU on 7.85Mhz, as well as 2.5Mhz, 5.0Mhz 10.0Mhz and maybe higher WWV signals.
I lived in Syracuse NY at the time, and used a wire antenna, with a very old,but still good Philco Model 620.
The Philco was a good Superhet multi band, with RF amp as well as mixer, IF amp, diode detector, plus triode audio amp and pentode audio output.
Was AM only,so I could not listen to SSB, and CW was not my thing.
Regardless, I was able to set my watch and clock by either CHU or WWV
Wayne WA2YNE





Re: uBitx V5 and JS8Call - Losing tx power on long transmissions. #js8call #v5 #ubitx

_Dave_ K0MBT
 

Agreed on the heat. Our uBITX radios will overheat finals with any prolonged transmission. Hi SWR will be bad as well. On the uBITX radios that we run in digital mode we have larger heat sinks and fans. I have used chunks of old computer heatsinks. On one radio, I isolated the screws and tied a piece of aluminum angle iron heat sink to the aluminum chassis and output finals. Works great no fan and no heat. I usually use an old standard uBITX output heatsink as a 7805 heatsink on the raduino board.