Date   
Re: Relationship between IF-S, calibration, and BFO?

Wiley1
 

That is exactly what I was wondering Vic. I will give it a shot tonight. 

Thanks
Bill
KE8EYM

Re: Relationship between IF-S, calibration, and BFO?

Vic WA4THR
 

IF-S is basically controlling the BFO on receive. If you adjust the BFO (shown as USB Calibration in Memory Manager) by the amount you have been adjusting your IF-S then you will correct that error and not have to use IF-S and your transmit will be corrected as well.

=Vic=

Re: Relationship between IF-S, calibration, and BFO?

EI4GNB
 

If You have set up correctly, then comfortable listening will likely require some IF-S to shift the bandpass downwards, adding more lower end, but all the way to the right sounds like You are way off.. I'm about 20% for nice even audio on the waterfall in JTDX, and less scratchy audio for phone. (V4 board)

Re: Homebrew li-ion battery pack into ubitx

MVS Sarma
 

I learnt another point today. Thanks Saneep jee


On Mon, 15 Apr 2019, 1:03 pm Sandeep Lohia <sandeeplohia12@... wrote:
End fed 1/2 wave is a voltage fed antenna Sarma ji, there might be more then kilo volts present even with QRP at end of coil...
Therefore thin PVC variable Gang Capacitor won't help...

On Mon 15 Apr, 2019, 12:35 PM Dave Dixon, <wylyeguy2@...> wrote:
Sarma,
               Look up G0POT for his efhw aerial and vk3 ye for his atu..Regards Dave.

On Mon, 15 Apr 2019 at 07:53, MVS Sarma <mvssarma@...> wrote:
Dear Pratap jee,
Your power inside is really welcome .
 One could take out the rig to field, with some end fed or a fold-able vertical antenna and used for an hour. 

Other mods are curiously awaited. Being a QRP, perhaps you can use PVC gang caps. 

Regards
sarma
vu3zmv

Re: Homebrew li-ion battery pack into ubitx

Sandeep Lohia
 

End fed 1/2 wave is a voltage fed antenna Sarma ji, there might be more then kilo volts present even with QRP at end of coil...
Therefore thin PVC variable Gang Capacitor won't help...

On Mon 15 Apr, 2019, 12:35 PM Dave Dixon, <wylyeguy2@...> wrote:
Sarma,
               Look up G0POT for his efhw aerial and vk3 ye for his atu..Regards Dave.

On Mon, 15 Apr 2019 at 07:53, MVS Sarma <mvssarma@...> wrote:
Dear Pratap jee,
Your power inside is really welcome .
 One could take out the rig to field, with some end fed or a fold-able vertical antenna and used for an hour. 

Other mods are curiously awaited. Being a QRP, perhaps you can use PVC gang caps. 

Regards
sarma
vu3zmv

Re: Homebrew li-ion battery pack into ubitx

Dave Dixon
 

Sarma,
               Look up G0POT for his efhw aerial and vk3 ye for his atu..Regards Dave.


On Mon, 15 Apr 2019 at 07:53, MVS Sarma <mvssarma@...> wrote:
Dear Pratap jee,
Your power inside is really welcome .
 One could take out the rig to field, with some end fed or a fold-able vertical antenna and used for an hour. 

Other mods are curiously awaited. Being a QRP, perhaps you can use PVC gang caps. 

Regards
sarma
vu3zmv

Re: Homebrew li-ion battery pack into ubitx

MVS Sarma
 

Dear Pratap jee,
Your power inside is really welcome .
 One could take out the rig to field, with some end fed or a fold-able vertical antenna and used for an hour. 

Other mods are curiously awaited. Being a QRP, perhaps you can use PVC gang caps. 

Regards
sarma
vu3zmv

Re: error Receive Length = 0/1027

MVS Sarma
 

Hi Cristian,
Please upload a screen shot of your error.
 secondly, please check whether you have set the port and Port has recognised  the CH340G  usb interface.
Finally define the chip as atmega328, and if possible as old bootloader.
the Arduino Nano is also to be selected.

all the best
regards
sarma
vu3zmv
 

Homebrew li-ion battery pack into ubitx

Prathap Naidu
 

Hi guys
Yesterday I Installed a homebrew 3S2P li-ion battery pack into my ubitx cabinet
Had planned my cabinet for the right space & fit
Now I can carry my ubitx for outdoor  action
Next I am building a small SOTA atu
Happy home brewing
Best 73
Pop
VU2POP

error Receive Length = 0/1027 #ubitx

Cristian (YO8SXT)
 

error Receive Length = 0/1027

Re: Kit-Projects ND6T Ubitx AGC

 

I have restocked mic's, paddles and AGC's. The AGC doc's have been updated with the correction for the DP3T.

73
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Relationship between IF-S, calibration, and BFO?

Wiley1
 

I am curious to the relationship of the IF-S to the calibration and/or the BFO. I have things set on the radio and I can hear pretty conversation clearly but my IF-S is set all the way to the right at 2000. I am guessing that it means I could still do some fine tuning somewhere.

Thanks for the help
Bill
KE8EYM

Re: Broke it like only a newbie can - Calibration problems

Wiley1
 

Thanks for all the help everyone. I got it working pretty good and I can hear conversations very clearly. 

Thanks again
Bill

Re: Kit-Projects ND6T Ubitx AGC

digger AB3XU
 

Tim, here's what I got this evening. Hopefully the numbers are good. They are similar to what I posted yesterday. The Vol-Hi measures are p-p done on an o-scope. There was a fair amount of noise at Vol-Hi maybe about 10mVp-p. It was tough getting a good connection.

Input       ADC     A7(Vdc)    Vol-hi(Vp-p)

-73dBm        2     0.02        20mV
-63dBm       59     0.303       72mV
-53dBm      158     0.795       240mV
-43dBm      196     0.981       660mV

I had to do the Vol-Hi measurements a second time after I realized it wouldn't work with the ADC on. (My turn to say, DOH)

--digger AB3XU

Re: separate CAT jack, without using the USB cable #ubitx #cat #raduino #arduino

Axel - CE3AFC
 

Sascha,

maybe you can solve your problem of the noisy stepper motor using a low speed DC gear motor like this:
https://es.aliexpress.com/item/DC-12V-Low-Speed-Geared-Motor-0-6RPM-High-Torque-Turbo-Worm-Electric-Geared-DC-Motor/32794283714.html?spm=a219c.10010108.1000016.1.45454ab1vnYqnT&isOrigTitle=true
very low power consumption as well.

73 Axel

Re: separate CAT jack, without using the USB cable #ubitx #cat #raduino #arduino

Sascha Bohnet | DL5SMB
 

Hi everybody,

for the OMs who where interested in this project, I have made two videos of the controller in use with the uBITX.

https://www.youtube.com/watch?v=ww6rSUQylGo

https://www.youtube.com/watch?v=ChBri3owEPc

The 2 or better 3 points I am still trying to work on / which need improvement are

1.) The sound intensity of the stepper motor. This is really annoying. The problem is i think that the capacitor gets pushed to hard by the pulses of the stepper which causes the vibration noises.

2.) For tuning, the loop controller switches the radio to AM and reduces power. Both functions are not supported by the uBITX.

a.) For getting a tuning signal i made the loop controller firmware change the mode to CW instead of AM for tuning.
However it is not working, i need to manually use a CW key (also called screwdriver) to get a usable signal.

b.) I think (depending on the band) 15 to 5 Watts is still to much output while tuning - or worse - while not having a good SWR.
I need to figure out an easy way to reduce output, which can be controlled via cat - maybe by manipulating the bias of the finals or by switching in an attenuater with a relays.

73

Sascha

Re: uBitx V5 Audio improvement

Philip
 

I have found that a 470 ohm in series with the 10 uF, seems to work well.
Philip G7JUR

Re: Order Confirmation

Curt
 

George

Its a big planet we live on. These rigs keep landing all over the world, from a small enterprise. Distract yourself by preparing everything for case assembly.  And explore what you may do later. Its a cool radio.

Curt

Re: Order Confirmation

George Blass
 

Ok thanks guys. I ordered it DHL. I just wanted to make sure the order went through. 

Re: Order Confirmation

cf_fizban
 

Which way did you order it? India post or DHL.  I ordered DHL and got full tracking info. If I remember right the website says if you order India post it is just the confirmation email no tracking.