Date   

Re: Power requirement

 

And discharging them below their minimum voltage can severly impact their recharge lifetime.


Re: uBitx v6 Microphone #v6

Curt
 

Rene

hang in there while you work these various challenges - those of us with a v3 or v4 experience more numerous challenges, I think.  its part of the radio building experience.  the list as well as hfsignals should be able to assist with 'fit' of the assembly pieces.  there is still a fine radio transceiver ready to emerge - be patient please. 

73 curt wb8yyy


Re: Power requirement

ajparent1/kb1gmx <kb1gmx@...>
 

I  vary my use based on power needs and operating time between charges.
Using my Ft817 as an example its fairly power hungry on RX (.370-450ma)
so even on the 8cell internal NiMh pack it s pretty well down after an hour or 
two to transmit at anything but lowest power.  Sill handy for RX uses that
need portable.

So back up is external Pack of 3S2P  (5 hour useful) and 2S4P (11 hour useful)
and they are both small and light.      The term xSyP is number of cells in series
and parallel, so 3S 4P means  4 in parallel and 3 groups of those in series.
That gives a max full charge (for the LiPO I used) of 12.6V and working
voltage of  11.1V which is ideal for FT817.  The cels used were LG brang 2800mah
so 4 parallel give a usable amp hours of 11.2ah.

Generally lithium chemistry rechargeable cels come in two voltages when
fully charged  LiPo nominal full charge of 4.2V and LIFePo4 at 3.7V.  Its
important to know that.   For a radio that wants 13.8V the LiFePo4 cells at
3.7V as 4S is the best bet at 14.8 full  charge and 12.8 working during
discharge as ideal.  The cell size anything over 5000mah will run the radio
for many hours.  You can buy commercial made packs of suitable size
with matching charger.

NOTE: lithium tech is very good but mishandle it or charge it incorrectly
it does represent a fire hazard.  Fuses to protect against short circuits are
advised. to protect wires and battery.

Allison
---------------------------------
No direct email, it goes to bit bucket due address harvesting in groups.IO


Re: CW Filter

Reg
 

Hi Laurent,
As promised the wiring I used to fit a Sotabeams CW filter into the uBitX, mine is a Version 5 board.

J1 is the connection on the board and a yellow wire comes from that and is soldered to the input of the volume control.
J2 has an orange wire that goes from the wiper of the volume control back to the board alongside J1 and the yellow wire. The third terminal on the volume control goes to ground connection.

With the switch up the yellow wire from J1 on the board goes to 2 on the switch and 1 on the switch takes it to the input of the volume control - so the filter is bypassed.

When the switch is down then 2 on the switch is connected to 3 and the signal is then taken to the input of the filter. The signal passes through the filter and returns to 5 on the switch which is also connected to 6 and the filtered signal is returned to the input of the volume control.

The audio level is controlled by the volume control whether the filter is by-passed or inline. When the filter is switched in it is in wide CW mode. A second switch is needed to switch a terminal on the filter to ground and that gives the narrow CW mode but I have left that off the drawing.

I don't see why you can't fit the AGC into the yellow wire leading to the input of the volume control and then put the filter between it and the input. I don't have AGC (yet) but this wiring works perfectly for me.

Hope that helps,
Reg      G4NFR 


Re: CW Filter

MadRadioModder
 

Interesting note here... if you use series varactor diodes to ground on the inner caps (that go to ground) and put variable voltage on the junction...you instantly have a variable pass-band control.  I believe that was done in the Elecraft K2 as well.  Check the circuit. 


MRM

 


On Mar 14, 2020, at 11:58 PM, Scott McDonald via Groups.Io <ka9p@...> wrote:


<image0.jpeg>


Bob, that will give you an idea of what I got with a quick and dirty 4 pole, not to die for but a big improvement over the ssb filter.

73 Scott


On Mar 14, 2020, at 10:38 PM, Scott McDonald via Groups.Io <ka9p@...> wrote:

Bob, I built a quick simple 4 pole cw filter using matched crystals (Only 1.50 each) from W8DIZ for a UBITX Receiver based on v3, and I think he is stocking 12 MHz matched crystals now.

Only issue was getting the cw BFO where I needed it but using KD8CEC software made that easy enough.

73 Scott ka9p

Make something good happen!

On Mar 14, 2020, at 9:41 PM, Bob Clarke <bclarke@...> wrote:

Has anyone looked at designing a crystal filter for CW, any number of poles? I like the notion of using adjustable digital filters but believe based on my industry experience that any ADC should preceded by decent analog filtering to prevent overload by IMD. 

Thanks! 

Bob, N1RC

--

…_. _._


Re: #v6 side tone too loud #v6

David Wilcox <Djwilcox01@...>
 

I always keep a couple of inexpensive ear phone extension cords with built in volume controls available from Amazon and EBay. Cheap, handy, and no mods. I just need another hand to control the volume.

David J. Wilcox K8WPE’s iPad

On Mar 14, 2020, at 6:20 PM, Bill Cromwell <wrcromwell@...> wrote:

Hi,

I tamed the sidetone volume in my V3 by inserting a pot (think volume control) as described. I harvested mine from an old transistor radio (it's volume control).

73,

Bill KU8H

On 3/14/20 3:34 PM, Evan Hand wrote:
Jim W0EB added a variable resistor to both the v3 to 5 Raduion clone and the v6. You could order one of the kits from: http://www.w0eb.com/
The alternative is to mimic his implementation of placing a variable resistor between the Raduino and the main board. The place that I scoped out was to lift R250 and mount it toumbston style and solder the wiper into that point, and ground one end of a 10k+ variable resistor and the other end to the pad that was lifted.
I personally would go with Jim's clone board. It gives the option of a spare if something goes south. The Nano supplied works with both.
73
Evan
AC9TU

--
bark less - wag more



Re: Power requirement

David Wilcox <Djwilcox01@...>
 

I have a friend who flies expensive drones and gives me his battery packs when they start showing trouble or bulging.  Usually only one cell is going bad so after dissecting 3 or 4 packs I have all the batteries I need to make what ever pack I need.  Cheap and fun.  As a reminder here is where the Weller 200 - 250 w soldering gun works well for soldering wires and bars to the batteries: lot of heat for very short time.  Ask around.

David J. Wilcox K8WPE’s iPad

On Mar 15, 2020, at 4:44 AM, Rene <rmvanb@...> wrote:

I use 18650 batteries from old laptop accu and bicycle batteries. Works great. Bought chargers at Ali express and battery holders for 3 and 4 batteries....


Re: Antenna Question #antennas #v3

Christopher Miller
 

I decided to make a choice. In a few hours the maintenance manager is going to come and drill a hole in the wall. I’m going to hang my dipole at about 40 feet. I’m going to hang a sign and addicts can get an rf burn if they grab it. It’s not ideal but we will see.

I forgot that I have a bench power supply so without a tuner I should be on 20 today,

Chris KF4FTR

On Sat, Mar 14, 2020 at 10:29 AM Andy_501 <andrew.webb.501.ve4per@...> wrote:

maybe HF signals will come out with something similar and have it's firmware tailored to meet tighter comm audio specs rather than standard audio/music specs

On 2020-03-14 10:32 a.m., Andy_501 via Groups.Io wrote:

And here is spec sheet and pictorial info showing audio connections to make patch cable to route into uBITx TX and RX audio paths

On 2020-03-14 10:21 a.m., Andy_501 via Groups.Io wrote:

Further info on C5Audio1 USB sound card latest price I found on digikey $17.01 Cdn see att info jumper req'd on bottom between card edge connector pins to power card from USB port from PC so launchpad not needed and can be mounted inside a #V6 case if used with it. Two screws bolts it to top spkr cover plate and USB cable to PC can be routed through small hole with rubber grommet in back panel.

On 2020-03-14 9:56 a.m., Andy_501 via Groups.Io wrote:

Here is pdf spec sheet for USB AUDIO Module

On 2020-03-14 9:27 a.m., Andy_501 via Groups.Io wrote:

You might want to try one of these C5000 it likely will be 1/2 & 1/2 learning and prebuilt. Just have to google search correct two pins to cross connect in order to power the card from the USB port 5 VDC supply when in use.  see att.  I believe it may be avlbl at digi key for about $10-$15


On 2020-03-14 8:58 a.m., Gordon Gibby wrote:
You will need some sort of a sound card adapter.  you can buy a signal link for $100, or you can make the thing yourself for about 20. But it will be a learning experience 


On Mar 14, 2020, at 09:37, Christopher Miller <djmalak2k6@...> wrote:


That actually is something I am worrying about.

I need to buy a cable to bring the usb out so I can plug my pc in. I know things have changed sine I used packet radio so woot! As soon as I get the guts to open the case.


Re: uBitx v6 Microphone #v6

Rene
 

I don't think they are gonna help me out with this.😏😏 i am wandering is there are more people with the same problems


Re: uBitx v6 Microphone #v6

Rene
 

I don't use isolator rings and just made some extra wires(short) connections to the metal closure...and if the diffrence were only 1 mm, there was no problem, but without the rings it is about 5 mm....is to big and lose connection from the plugs


Re: Power requirement

Rene
 

I use 18650 batteries from old laptop accu and bicycle batteries. Works great. Bought chargers at Ali express and battery holders for 3 and 4 batteries....


Re: how to access plot screen data from Antuino?

Rene
 

Misschien met ubitx manager??


Re: CW Filter

Scott McDonald
 



Bob, that will give you an idea of what I got with a quick and dirty 4 pole, not to die for but a big improvement over the ssb filter.

73 Scott


On Mar 14, 2020, at 10:38 PM, Scott McDonald via Groups.Io <ka9p@...> wrote:

Bob, I built a quick simple 4 pole cw filter using matched crystals (Only 1.50 each) from W8DIZ for a UBITX Receiver based on v3, and I think he is stocking 12 MHz matched crystals now.

Only issue was getting the cw BFO where I needed it but using KD8CEC software made that easy enough.

73 Scott ka9p

Make something good happen!

On Mar 14, 2020, at 9:41 PM, Bob Clarke <bclarke@...> wrote:

Has anyone looked at designing a crystal filter for CW, any number of poles? I like the notion of using adjustable digital filters but believe based on my industry experience that any ADC should preceded by decent analog filtering to prevent overload by IMD. 

Thanks! 

Bob, N1RC


Re: Power requirement

McRuss
 

That's what I thought.  As was asked, my intention is to use this radio as a portable and I do have a portable 12V power supply so will scrap the idea of the AA battery pack (the 12 V power supply is large and heavy but will do the job, was just hoping for a smaller/lighter option.)  Thanks for all the quick suggestions; I'm sure I'll have more questions once it arrives (next week) and I get it set up.
--
Newbie
K5FJR


Re: CW Filter

Scott McDonald
 

Bob, I built a quick simple 4 pole cw filter using matched crystals (Only 1.50 each) from W8DIZ for a UBITX Receiver based on v3, and I think he is stocking 12 MHz matched crystals now.

Only issue was getting the cw BFO where I needed it but using KD8CEC software made that easy enough.

73 Scott ka9p

Make something good happen!

On Mar 14, 2020, at 9:41 PM, Bob Clarke <bclarke@...> wrote:

Has anyone looked at designing a crystal filter for CW, any number of poles? I like the notion of using adjustable digital filters but believe based on my industry experience that any ADC should preceded by decent analog filtering to prevent overload by IMD. 

Thanks! 

Bob, N1RC


Re: CW Filter

Jerry Gaffke
 

Yup.
Here's an old thread on adding a separate CW crystal filter to the uBitx:
    https://groups.io/g/BITX20/topic/32840565

Jerry, KE7ER


On Sat, Mar 14, 2020 at 07:40 PM, Bob Clarke wrote:
Has anyone looked at designing a crystal filter for CW, any number of poles? I like the notion of using adjustable digital filters but believe based on my industry experience that any ADC should preceded by decent analog filtering to prevent overload by IMD. 

Thanks! 

Bob, N1RC


Re: CW Filter

Bob N1RC
 

Has anyone looked at designing a crystal filter for CW, any number of poles? I like the notion of using adjustable digital filters but believe based on my industry experience that any ADC should preceded by decent analog filtering to prevent overload by IMD. 

Thanks! 

Bob, N1RC


Re: Power requirement

ajparent1/kb1gmx <kb1gmx@...>
 

For 12V ops I use Nimh or NiCd x10 cells.  works well enough.
Problem is that the largest AA nimh is 2600mah (maybe 2800), with
a 150ma RX or more and 2A tx the run time will be short.  That
and 10AA cells are not light!  However that is the cheapest light
rechrageable option.  Non rechargeable cells will be costly to use.

Next size up gets out of the AA cell size, and the cost excalates.

For LifePo4 you need 4 and a specific charger but to get decent run time
you need cells (or battery ) over 5AH.  Advantege is weight, disadvantage cost 
and careful charging requirement.

Cheap, the usual 7-8AH 12 V gell cell battery.  Easy to charge being lead,
and 7Ah will give decent run time.  ITs a fairly benign battery compared to 
lithium chemistry.

Since you didn't say if portable or what other operations are desired its tough
to say use a specific thing.

Allison
---------------------------------
No direct email, it goes to bit bucket due address harvesting in groups.IO


Re: #v6 side tone too loud #v6

Bill Cromwell
 

Hi,

I tamed the sidetone volume in my V3 by inserting a pot (think volume control) as described. I harvested mine from an old transistor radio (it's volume control).

73,

Bill KU8H

On 3/14/20 3:34 PM, Evan Hand wrote:
Jim W0EB added a variable resistor to both the v3 to 5 Raduion clone and the v6.  You could order one of the kits from: http://www.w0eb.com/
The alternative is to mimic his implementation of placing a variable resistor between the Raduino and the main board.  The place that I scoped out was to lift R250 and mount it toumbston style and solder the wiper into that point, and ground one end of a 10k+ variable resistor and the other end to the pad that was lifted.
I personally would go with Jim's clone board.  It gives the option of a spare if something goes south.  The Nano supplied works with both.
73
Evan
AC9TU
--
bark less - wag more


Re: #v6 side tone too loud #v6

Curt
 

take a look to see how that part of the schematic compares to v4 -- I used this simple fix, except I think I used a larger value resistor - you may need to experiment a little. 

https://petetest2017.files.wordpress.com/2019/02/cw-tone-amplitude-reduction.pdf