Date   
Re: bitx and ubitx encoder replace ment

Sascha Bohnet | DL5SMB
 

Sorry to bring back such an old topic, but might I ask how this infamous 100 PPR encoder  can be dissassembled / how  the detent mechanism can be removed?

I removed the 3 nuts, removed the 6 screws, removed the handle and can't figure out how to proceed further.

I could imagine the PCB needs to be removed next - is this correct? Is it enough to unsolder the 4 PINs on the bottom? It does not seem so.

I am a bit afraid of killling the thing if  i just proceed without a plan.

Re: Operating uBITZ

Balasubramanyan Cp
 

Thank you.😁73s. VU2UYC Balsun.


On Sat, Jul 27, 2019 at 4:19 PM Liam Kingsmill <lumetters1@...> wrote:
Mark, Darwin, Olivier ... Thank you!

Re: bitx and ubitx encoder replace ment

Alf Baranda
 

Robert please tell us how you eliminated the coder retention.
I'm also with the same dilemma, I don't know how to remove it and I'm afraid to destroy it.
I hope someone can clarify it for us.
Thank you.

Re: bitx and ubitx encoder replace ment

Mark Hatch
 

I have tried both the 100ppr and a 24ppr with the kd8cec software. I saw a lot of missed steps on the 100 and the 24ppr was inconsistent in response. 

Are you you seeing something different or using something other than the ld8cec software?

mark

Understanding the uBitX.

Ravi Miranda
 

Hi,

I understand that this may have been tackled before, but I'm trying to
understand the best way to resolve signals on my DIY uBITx Rx/Tx.

The attached pic shows the frequency response of my filter using NWT Lite.

In the conventional way, the USB and LSB can be shifted. But in the
case of uBITx the shifting is done by the LO2. Which means that if the
centre of the above filter is 11,058,109Hz, then the LSB will have to
be at 11,056,000 and the USB will have to be 11,060,000. which would
be +/-2KHz on either side of the BFO frequency. Any of the other
frequencies chosen at the three or four intersecting points on either
side of the centre would mean narrower filters and therefore good for
cutting out interfering signals. Is this interpretation correct?

Which then leads me on to the following:
For a Display frequency of 10MHz, the VFO frequency should be 55MHz?
The LO2 frequency should be offset as follows:
+/-2KHz from the centre of the Xtal filter (assuming 11058100Hz), LO2
should be set at 33943900Hz and LO2 set at 56060100Hz for USB.
Measuring the frequencies at VFO, LO2 and BFO indicate that
frequencies generated (using V1.2) are way off these expected values
and I was wondering if any one on the group had seen similar behaviour
from the code?

Many thanks.


Ravi/M0RVI

--
I'm here to add more value to the world than I'm using up.

Ver 5.1 uBITZ Calibration

Liam Kingsmill <lumetters1@...>
 

Please suggest a calibration procedure for a 5.1 uBITZ

Re: Ver 5.1 uBITZ Calibration

MVS Sarma
 

Liam,
Do you uese stock firmware or kd8cec ver1.20?

If later i can send old procedure and it is continued by kd8cec.   All the best.

Sarma vi3zmv

On Mon, 29 Jul 2019, 7:32 pm Liam Kingsmill, <lumetters1@...> wrote:
Please suggest a calibration procedure for a 5.1 uBITZ

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

Dennis Beverage
 

It would be helpful/informative if some of you would include photo/s and source info re these custom heat sinks.  Seems like most of us should be using bigger heat sinks just as a matter of precaution.  Also, installing and isolating custom heat sinks could be tricky.  Thanks for your ideas though.
--
Sodypop🤠
KJ6VGB

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

Doug W
 

don't discount the heat removing power of a little moving air...
https://groups.io/g/BITX20/message/53168  
--
www.bitxmap.com

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

Dennis Beverage
 

Great tip Doug.  Looks like it would fit with most cases.  Probably would eliminate the need for bigger heat sinks in most cases.  I don’t even have a case yet, but I’m ordering one anyway.
--
Sodypop🤠
KJ6VGB

CEC firmware V5

Herman Scheper
 

Which version I have to download for my V5 board. I planned to use a Nextion Enhanced 5" display.

I download the CEC 1.2 files and unpacked them..

Now I have the choise between several versions…..as: UbitxV5 CEC V.1.200 NX or V1.200NX-S     etc.

Which I have to select form this list...?

PA0BAB- started after 30 years inactive with building this kit. It works!!!

Re: CEC firmware V5

Mark Hatch
 

Spend the few extra $$ for the enhanced. It is s faster GPU and more memory.

Check out my 5" Nextion software in AJ6CU in the files system. It optimized the user interface for 5" resolution.

73
Mark
AJ6CU

Re: CEC firmware V5

Herman Scheper
 

I have the enhanced version!!  Your AJ6CU file is the tft file i need for in the display when i understand well.

I am planning first toreplace the original firmware 5.1 for CEC firmware 1.2. The question is which CEC 1.2 version I need for the 5” enhanced Nextion.

Paobab

Herman vanaf z'n IPad.

Op 29 jul. 2019 om 19:09 heeft Mark Hatch <mark2382@...> het volgende geschreven:

Spend the few extra $$ for the enhanced. It is s faster GPU and more memory.

Check out my 5" Nextion software in AJ6CU in the files system. It optimized the user interface for 5" resolution.

73
Mark
AJ6CU

Re: Ver 5.1 uBITZ Calibration

Liam Kingsmill <lumetters1@...>
 

Sarma, stock firmare here.

Re: CEC firmware V5

Mark Hatch
 

Sorry. The  "-S" is for support of the S-meter function. What is not clear, is whether -S is for the standalone s meter (requiring a second nano) or for any s-meter (i.e. you hook up a sensor to A7 on your raduino. I tried searching his website, but couldn't find where he defined the "-S" option (Know I saw it somewhere....)

I would advise installing the "-S"  version even if you don't have the sensor. Shouldn't do any harm and you are set for an eventual upgrade.

73
Mark

Re: bitx and ubitx encoder replace ment

GM4CID
 

Remove the knob handle, then, using a heat gun or hair dryer heat the silver knob insert to soften the adhesive and carefully pry off that silver insert to reveal retaining screws that can be removed. The mechanism will now come apart and you can remove the detent. Replace everything but not the handle.

FS: QRP Gear

 

Due to financial reasons these items must go:

4SQRP Hilltopper 20 with LCD: 110$ shipped

SodaPopII with case ready to go 80$ shipped

4SQRP 4S tuner 50$ shipped

MFJ-TNC x 1270-x with 2 yaesu cables 110 shipped

Private msg me and good on the zed for email
--
David

 N8DAH
Kit-Projects.com

Shop is open!

Antuino fix

David Wilcox
 

Is anyone considering ordering the parts for the Antuino fix and selling them in sets for those of us who don't have an SMD junque box?  I would be interested and have two friends with the same problems, I would fix theirs at the same time if kits of parts were available.

Dave K8WPE

Re: FS: QRP Gear

 

Re: FS: QRP Gear

 

tuner sold
--
David

 N8DAH
Kit-Projects.com

Shop is open!