Date   

Re: ILER QRP CAG (AGC)

Brutus Laurentius
 

The manual for the module says it has been adapted to the ubitx, and it looks to me like it would work readily enough since it is audio only.  


Re: 100/ppr Rotary Encoder Detents

Arv Evans
 

Some of the inexpensive rotary encoders do have two steps per detent.  We found that
in early BITX units with the Si5351a synthesizer.  This required a small software change
to accommodate that situation. 

Removing the detent stops on higher resolution rotary encoders could be problematic due
to inadvertent state changes when pushing the knob to activate the push switch.  On lower
resolution encoders this is less of a problem. 

Arv
_._


On Fri, Mar 15, 2019 at 6:30 AM Scott McDonald via Groups.Io <ka9p=aol.com@groups.io> wrote:
Call me crazy but I find the clicking annoying on a receiver, unless it’s a field radio where the resistance can be an advantage.  Haven’t seen it on a premium receiver, won’t say none have it.

But there can be technical advantages to removing the clickstop mechanism if the firmware/software is set up to exploit it.  The SDR-Kits Si570 vfo instructions tell you how to remove the clickstop from their encoder because in addition to making it smooth, the firmware apparently is set up to detect positions between the detente, effectively quadrupling the resolution, if I remember correctly.

They also offer a clickless optical encoder upgrade, so I expect  at least some folks prefer it that way.

73 Scott Ka9p


On Mar 15, 2019, at 6:51 AM, Dennis Zabawa <kg4rul@...> wrote:

I have several commercial devices that ALL have encoders with detents.  I have no difficulties operating any of them.  So I have to ask the question why not do the same with your uBITX?


Re: Balanced Mixer Audio Input Impedance

Tom, wb6b
 

That is interesting to ponder. I've been up all night working on a client project, so I'm a little fuzzy right now, but is sounds like if you could not control the phase reversals some other way that is more convenient, DC coupling the PSK31 signal to the balanced modulator could be a way to do PSK31.

On your other earlier comments, I think the EER concept interesting (looked at the thread you linked). I have read that the past attempts have been marginal. With the digital signal processing that is now available it would seem it may be possible to do EER well. I wonder if we have reached a point where for small, portable, low power HF SSB transmitters, VHF/UHF power transistors might have reached a low enough price point that we could simply pulse width modulate them at several hundred MHZ to produce SSB signals at HF frequencies. Wonder how hard it would be to drive the gates to switching levels at several hundred MHZ, though.   

Tom, wb6b


Re: Kit-Projects ND6T Ubitx AGC

KE2GKB
 

The version you have is the production design. The photos on the website are the prototype revision. After installing it in my own uBitx I realized it was harder then it needed to be so I adjusted the solder pads to make everyone else's life's easier. The only changes are to the pad layout.

73

Tim Keller - KE2GKB https://shop.kit-projects.com


Feedback/"echo"/ringing #bitx40 #bitx40help

Robert D. Bowers
 

I've got a new problem... and the severe return of an older problem.  Maybe someone has seen this or can explain why it happened.

My BitX40 had a stereo 1/8 jack for audio out.  After all sorts of headaches with cabling connected to it, I replaced it with a mono 1/8 jack, as that was more appropriate (and I have good cables for that).

Once I did that, I now have severe ringing/echo/feedback in the audio - especially when I use my external noise filter (which also serves as agc).  At the same time, the ignition noise and alternator whine has returned almost as bad as when I started.

I'd already replaced the two wires from the board to the original jack with a short length of shielded mono audio cable (rather like found in some computers), and it shouldn't be doing this - replacing that cable (along with re-cabling the wires to the volume control) helped reduce ignition noise and alternator whine  before replacing the jack.

The only thing different is that if I remember right, there was a small disk cap on the stereo jack I removed... I've misplaced it otherwise I'd put it back.  I didn't note the value of it so I don't know what was there - and there is no information I could find indicating what the value should be.  It shouldn't have that much effect anyway based on the schematic, but that's the ONLY real change besides the jack.

Any suggestions or ideas of what is going on?  The radio is useless for what I wanted (as it is right now) - mobile use.  It picks up every hiccup that comes from the automobile electrical system!  (And the ringing/echo/feedback makes volume levels loud enough to understand while driving... difficult.)

Thanks!
Bob
N4FBZ


Re: Wire-up (Almost) Done #bitx40

Pat Anderson <anderson5420@...>
 

Thanks, Vic, that was my assumption but not sure. The two wires I took to the BNC ground lug were the negative from the PA and the negative from the Raduino. 


On Fri, Mar 15, 2019 at 1:43 AM Vic WA4THR via Groups.Io <vhklein=ptd.net@groups.io> wrote:
Electrically, all the grounds are the same DC-wise (note, the heat sink on the PA is NOT at ground potential), and any single point ground, such as the tab on the BNC connector, should be fine RF-wise. So, in short to your question, yes.

=Vic=


Re: Kit-Projects ND6T Ubitx AGC

dseyler@...
 

It appears that you have changed the layout of the solder pads for the switch wires. It does not match the board that I have. Is this a newer design?

Doug WB5TKI


Re: 100/ppr Rotary Encoder Detents

Jim
 

In my case it is probably “0ld School” as I am used to a smooth feel on a tuning dial. If tuning at a medium speed I want to hear the radio signals popping by as I can usually hear and ID a signal opposed to also hearing the mechanical clicking of the detent.
Jim
WA3APC


Re: 100/ppr Rotary Encoder Detents

Jack, W8TEE
 

Mouser carries "detentless" encoders for under $2, so unless you value your time at less than 10 cents per hour, why not buy one or go big an buy an optical encoder.. The resolution depends upon the encoding it uses. Personally, I like the detent as it prevents the "coasting" I see on many xcvrs. Trying to tune into a Net (e.g., on 7.197) was a pain with my FTde1200 to the point where I just sold it.

Jack, W8TEE

On Friday, March 15, 2019, 8:30:18 AM EDT, Scott McDonald via Groups.Io <ka9p@...> wrote:


Call me crazy but I find the clicking annoying on a receiver, unless it’s a field radio where the resistance can be an advantage.  Haven’t seen it on a premium receiver, won’t say none have it.

But there can be technical advantages to removing the clickstop mechanism if the firmware/software is set up to exploit it.  The SDR-Kits Si570 vfo instructions tell you how to remove the clickstop from their encoder because in addition to making it smooth, the firmware apparently is set up to detect positions between the detente, effectively quadrupling the resolution, if I remember correctly.

They also offer a clickless optical encoder upgrade, so I expect  at least some folks prefer it that way.

73 Scott Ka9p


On Mar 15, 2019, at 6:51 AM, Dennis Zabawa <kg4rul@...> wrote:

I have several commercial devices that ALL have encoders with detents.  I have no difficulties operating any of them.  So I have to ask the question why not do the same with your uBITX?


Re: 100/ppr Rotary Encoder Detents

Scott McDonald
 

Call me crazy but I find the clicking annoying on a receiver, unless it’s a field radio where the resistance can be an advantage.  Haven’t seen it on a premium receiver, won’t say none have it.

But there can be technical advantages to removing the clickstop mechanism if the firmware/software is set up to exploit it.  The SDR-Kits Si570 vfo instructions tell you how to remove the clickstop from their encoder because in addition to making it smooth, the firmware apparently is set up to detect positions between the detente, effectively quadrupling the resolution, if I remember correctly.

They also offer a clickless optical encoder upgrade, so I expect  at least some folks prefer it that way.

73 Scott Ka9p


On Mar 15, 2019, at 6:51 AM, Dennis Zabawa <kg4rul@...> wrote:

I have several commercial devices that ALL have encoders with detents.  I have no difficulties operating any of them.  So I have to ask the question why not do the same with your uBITX?


Re: 100/ppr Rotary Encoder Detents

Dennis Zabawa
 

I have several commercial devices that ALL have encoders with detents.  I have no difficulties operating any of them.  So I have to ask the question why not do the same with your uBITX?


Re: Maximum and minimum voltages for uBitX V5?

Vic WA4THR
 

A mod I have done on a couple BitX rigs now is to add a 12v regulator on the line supplying power to the main board and Raduino. Even with a 12v supply the supplied voltage stays up around 11, which is OK and less stressful on the 5v regulator, but you can safely supply up to maybe 20v to the rig, getting the benefit of higher power at the PA, without risking anything else. These regulator chips are pretty self-protective, too, and shut down if they overheat, which is how I discovered that a heat sink is needed on the uBitX with a Nextion display.

=Vic=


Re: Wire-up (Almost) Done #bitx40

Vic WA4THR
 

Electrically, all the grounds are the same DC-wise (note, the heat sink on the PA is NOT at ground potential), and any single point ground, such as the tab on the BNC connector, should be fine RF-wise. So, in short to your question, yes.

=Vic=


ILER QRP CAG (AGC)

iz oos
 

Hi I have a couple of the excellent monoband ILER QRP both equipped with a plug and play AGC. I am wondering whether anybody have adapted it to the ubitx.


Re: 100/ppr Rotary Encoder Detents

MVS Sarma
 

Prabha jee, i like white color jilebee. . If you have seen what HF Signals supplies with ubitx, it is silent , no dents or ticks.


On Fri, 15 Mar 2019, 12:22 pm Praba Karan <vu3dxr@... wrote:
Why are so many here hating detents in rotary encoder?

On Fri, Mar 15, 2019, 2:54 AM JAMES COOK <Jscook@... wrote:
Just received one of the neat 100/ppr black rotary encoders from an eBay vender. Looks great. It does have 100 dentents per rev. Any one had one apart ? Was thinking of disabling the mechanical detent.
Jim
WA3APC


Re: Brand new unbuilt V4 for sale #bitx40

Jacob Farnes
 

Direct Message sent to your reply email.


Re: Memory Manager V1.08 baud rate

John Ferguson (G8STW)
 

Try 38400 not 384000, just a thought.
John


Re: 100/ppr Rotary Encoder Detents

Praba Karan
 

Why are so many here hating detents in rotary encoder?


On Fri, Mar 15, 2019, 2:54 AM JAMES COOK <Jscook@... wrote:
Just received one of the neat 100/ppr black rotary encoders from an eBay vender. Looks great. It does have 100 dentents per rev. Any one had one apart ? Was thinking of disabling the mechanical detent.
Jim
WA3APC


Kit-Projects ND6T Ubitx AGC

 

More posted tonight.

https://shop.kit-projects.com/index.php?route=product/product&product_id=101
--
David

 N8DAH
Kit-Projects.com

Shop is open!


Re: Difference between 2N2222A and PN2222A #ubitx40help #ubitx-help

VE3MIC
 

Getting even more interesting...

Your sheets show 0.8A for the 2N2222a and 0.6A for the PN2222a..
However your 2N2222a is in a TO-18 case, whereas, the spec sheets that I was looking at were both TO-92 case styles.

73 de Mike