Date   

Re: TX frequency? of uBitx at CWL and CWU mode #ubitxcw

Don Meyerhoff
 

Michael,

We're you able to get a copy of 1.095 and if you did do you have a link for it? I'm running 1.094 but would like the CW shift feature in ubitx manager.

73

Don Meyerhoff
WA2SWX


On Tue, Jul 3, 2018, 8:53 AM Michael Babineau <mbabineau.ve3wmb@...> wrote:
Ian : 

Yes I am currently using V1.094 beta with the Nextion 2.8" Display.

 I will upgrade to V1.095 and try that.

Cheers

Michael VE3WMB 


Re: Running on a Jump Box

M Garza <mgarza896@...>
 

Gwen,
Here are the PA BIAS adjustment notes from HF Signals:

Marco - KG5PRT

On Fri, Jul 6, 2018 at 12:56 PM Gwen Patton <ardrhi@...> wrote:
Ok, I'll not limit the current.

Can anyone give me advice on how to PROPERLY adjust RV1? It and RV2 are the bias adjustments for the finals, right? Do I need to adjust them both, and is there something I should NOT do when diddling those adjustments? Would any diagnostic tools (besides a wattmeter on the output) help?

Gwen, NG3P


Re: Just built my ubitx, can't receive anything #ubitx-help #ubitx

Tue Iron
 

hi andrew, does your volume control increase the sounds. ?.
if not check the wiring to the volume control make sure the orange wire is in the middle. good luck .ken.

On 6 July 2018 at 20:09, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
The junky SW receiver assumes you have a junky antenna to go with it,
and so has spent an extra $0.25 on more RF gain.

The uBitx assumes you have a resonant antenna system suitable for transmitting.
If it had as much RF gain as the junky SW receiver, it would badly overload on strong signals
when hooked up to a decent antenna.
Fairly typical of a communications receiver to expect a good antenna.

You could have both, add maybe 20dB more gain around Q10 and also add an RF gain control.
Be careful how you go about it though or you will compromise the noise floor when working with a good antenna.
The uBitx is meant to be a good minimalist rig, if you want to add extra stuff it's up to you.



On Fri, Jul 6, 2018 at 11:18 am, <andrew.pater.brown@...> wrote:
I can't imagine that I need 50 feet of antenna to pick up WWV when I used to be able to listen on a junky SW receiver with a 3 foot long antenna. And again, I'm able to pick up transmissions on my Drake TR4 with the same piece of random wire.



Re: Anyone seen an SSB xmit causing the menu to pop up?

M Garza <mgarza896@...>
 

Gwen,
Glad you got it worked out.

Marco - KG5PRT

On Fri, Jul 6, 2018 at 12:54 PM Gwen Patton <ardrhi@...> wrote:
I put some small ferrite beads on some of the wires, and snap-on ferrites around all the Raduino wires, the audio wires, and the lead from the board to the antenna jack (I replaced the thin wires with a short piece of coax).

It worked. I no longer trigger the menu just by talking into the mike.

Thanks for the suggestions, they helped a lot!

Gwen, NG3P


Re: NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up

Joe
 

Not yet but we are in the process of doing a 5 inch.
Work is just being finished on 3.5 ver.
Kn4ud, Allen had some computer issues.

He is going to order a 5 inch and that is the next display size on the list


Joe
VE1BWV



On Fri, Jul 6, 2018, 2:53 PM Jim Sheldon <w0eb@...> wrote:
I really hate the Nextion editor though, The pix you have to work with runs everything together and either I'm missing something in the instructions, or this is one of the poorest designed GUI editors I've ever seen.

Jim , W0EB

------ Original Message ------
From: "Kees T" <windy10605@...>
Sent: 7/6/2018 12:31:55 PM
Subject: Re: [BITX20] NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up

WOW ! You guys are amazing. I'm very impressed with the graphics.

73 Kees K5BCQ (a non programing type)


Re: New case for uBiTX #ubitx

William Cullison
 

Looks nice Jim.

73 Bill WA8VIH/4

On Fri, Jul 6, 2018, 15:15 Jim Reagan <jimreagans@...> wrote:
This is my latest uBiTX (v4) mounted in a Hammond 1402DV case.  I replaced the LCD with a blue one and have added the ND6T AGC circuit.  I had to use uBiTX memory manager to change the BFO frequency, since the audio was "very thin" from the factory.  I'm now happy with the radio!
Cheers,
Jim W0CHL


New case for uBiTX #ubitx

 

This is my latest uBiTX (v4) mounted in a Hammond 1402DV case.  I replaced the LCD with a blue one and have added the ND6T AGC circuit.  I had to use uBiTX memory manager to change the BFO frequency, since the audio was "very thin" from the factory.  I'm now happy with the radio!
Cheers,
Jim W0CHL


Re: Just built my ubitx, can't receive anything #ubitx-help #ubitx

Jerry Gaffke
 

The junky SW receiver assumes you have a junky antenna to go with it,
and so has spent an extra $0.25 on more RF gain.

The uBitx assumes you have a resonant antenna system suitable for transmitting.
If it had as much RF gain as the junky SW receiver, it would badly overload on strong signals
when hooked up to a decent antenna.
Fairly typical of a communications receiver to expect a good antenna.

You could have both, add maybe 20dB more gain around Q10 and also add an RF gain control.
Be careful how you go about it though or you will compromise the noise floor when working with a good antenna.
The uBitx is meant to be a good minimalist rig, if you want to add extra stuff it's up to you.



On Fri, Jul 6, 2018 at 11:18 am, <andrew.pater.brown@...> wrote:
I can't imagine that I need 50 feet of antenna to pick up WWV when I used to be able to listen on a junky SW receiver with a 3 foot long antenna. And again, I'm able to pick up transmissions on my Drake TR4 with the same piece of random wire.


Re: Just built my ubitx, can't receive anything #ubitx-help #ubitx

davedt1e@...
 

I can't account for the Drake,  but I have a bunch of shortwave recievers that work well on short antennas.  They are designed to work reasonably well with short antennas.  Wide band and RF amp stages maybe?  Others more knowledgeable than I can explain that much better.

I've got several HF transceivers and can't hear much of anything on them without a good length of antenna out.

3 foot antenna receive on Drake?  Maybe because it's a Drake ;-)

The good news is that I'll bet your Ubitx is fine and you'll be enjoying using it shortly!


Re: Just built my ubitx, can't receive anything #ubitx-help #ubitx

andrew.pater.brown@...
 

If I disconnect the antenna, the static definitely decreases. I did briefly hook up my 40 meter half wave dipole (though I did not hang it, stupid rental rules, I just ran the inner wire across my house a few feet off the floor for testing) and it was even louder. But still no recognizable signal, just static and on some frequencies, a solid tone.

I can't imagine that I need 50 feet of antenna to pick up WWV when I used to be able to listen on a junky SW receiver with a 3 foot long antenna. And again, I'm able to pick up transmissions on my Drake TR4 with the same piece of random wire.

That said, if that's the suggestion, I'll gladly go run some wire outside this evening and try again with a much longer random wire and report back.


Re: Just built my ubitx, can't receive anything #ubitx-help #ubitx

Clark Martin
 

If you disconnect the antenna does the static go down in volume?  If it does then the problem is the antenna, or lack thereof.



Clark Martin
KK6ISP

On Jul 6, 2018, at 10:01 AM, andrew.pater.brown@... wrote:

I am super excited to play with this thing, so when I got the kit I immediately built it. It does power up, and I hear what sounds like radio static. If I tune to certain frequencies I can hear tones that change based on frequency selected. However, even just with a random wire (albeit only about 3 feet long in my testing, but the shortwave receivers I had as a kid didn't have much longer) I can't pick up anything recognizable as a voice or CW contact, even stuff like WWV (on 5, 10, 15mhz) or the powerful shortwave stations like brother stair or whatever.

A few notes that I don't think would affect it based on my knowledge, but I'll share anyway in case I'm wrong-

1) I'm using external PC speakers, powered ones - it's just what I have on hand.
2) I'm using a 13.8vdc power supply that I picked up from another HAM a long time ago. It works fine to power 2m band VHF radios and such that are for a mobile application. It's possible it's noisy, but I've located away from it as far as I can.
3) I 3d printed a case for my ubitx and lined it internally with aluminum foil tape to keep the CIA signals out. Er, did I say that? I mean, rather, mitigate some of the RF noise. I have tested inside and outside of this case and there was no noticeable difference, so I don't believe the foil is related.
4) At first I was building and trying it in my basement and hoped I just couldn't get a signal down there. But this morning I tried it upstairs as well, and there was still no signal at all that was recognizable as a voice or CW transmission.
5) I followed the directions on the build page and have gone back through and verified I did everything.

Any ideas what might cause this?


Re: Just built my ubitx, can't receive anything #ubitx-help #ubitx

davedt1e@...
 

I'm no pro, but it sounds to me like you don't have enough antenna out.  If I understand you correctly you're using a 3 foot antenna?  I would try to get at least 50 ft or so out for recieve,  even if you just tie it along a fenceline  or something similar.   Or maybe just throw a roughly 40 meter loop up on the roof.  In my own experience your just not going to hear much (as you would with a shortwave receiver) on hf with such a small antenna.

Also, I just built the QRP Guys Multi - Z tuner and really like it.  It's inexpensive and fun to build...and may help a little with reception.

If I mis-read your post about 3 ft long antenna, then just ignore everything I said!  LOL!

Good Luck!


Re: Removing insulation from fine wires

Guy N7BIR <sgbridge@...>
 

These RadioShack wire strippers have always worked for me. 


Re: Running on a Jump Box

Gwen Patton
 

Ok, I'll not limit the current.

Can anyone give me advice on how to PROPERLY adjust RV1? It and RV2 are the bias adjustments for the finals, right? Do I need to adjust them both, and is there something I should NOT do when diddling those adjustments? Would any diagnostic tools (besides a wattmeter on the output) help?

Gwen, NG3P


Re: NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up

Jim Sheldon
 

I really hate the Nextion editor though, The pix you have to work with runs everything together and either I'm missing something in the instructions, or this is one of the poorest designed GUI editors I've ever seen.

Jim , W0EB

------ Original Message ------
From: "Kees T" <windy10605@...>
Sent: 7/6/2018 12:31:55 PM
Subject: Re: [BITX20] NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up

WOW ! You guys are amazing. I'm very impressed with the graphics.

73 Kees K5BCQ (a non programing type)


Re: Anyone seen an SSB xmit causing the menu to pop up?

Gwen Patton
 

I put some small ferrite beads on some of the wires, and snap-on ferrites around all the Raduino wires, the audio wires, and the lead from the board to the antenna jack (I replaced the thin wires with a short piece of coax).

It worked. I no longer trigger the menu just by talking into the mike.

Thanks for the suggestions, they helped a lot!

Gwen, NG3P


Crystal CW filter with Version 4 uBITX boards? #ubitx

Jim Sheldon
 

Has anyone successfully added a narrow crystal filter to the uBITX version 4 boards using Ashhar's included header connections? 

So far I've not been able to get a signal through filters at 4.6,  6.2 or 8 MHz.  The filters use closely matched crystals, They are Chebychev filters and have been designed with "ELSIE" for a 200 ohme input/output impedance with 4:1 transformers to match them to Ashhar's specified 50 ohms. Software has also been modified to allow moving the BFO and IF frequencies to match the filter's frequencies.  Can't seem to get enough signal through them to be useful though the software DOES put the IF where it should be.  I can hear a signal generator on whatever frequency the uBITX is tuned to, but it takes better than 10 microvolts input at the antenna for what I'd consider to be a usable CW signal in the headphones.

I built the filter using a 4 crystal - 200 ohm 8 MHz circuit with crystals and other components purchased from INRAD (Vibroplex now owns them) but either I haven't figured out the proper 4:1 transformers or there's just too much loss through the filter.  I have tried it with 4 and 6 MHz filters I made from scratch with only slightly better results (6 microvolts at the antenna for a usable signal)

Sure would be nice if someone was able to get something working to the point it was usable and repeatable, even on perf-board. 

The idea of switching the IF frequency to switch filters appears to be sound - just need to find the magic crystal/capacitor/transformer combination and for that I need someone with better knowledge of crystal filters and better test equipment that I have.

Thanks

Jim Sheldon, W0EB


Re: NEXTION DISPLAY UPDATES For KD8CEC ver 1.094 up

Kees T
 

WOW ! You guys are amazing. I'm very impressed with the graphics.

73 Kees K5BCQ (a non programing type)


Re: Removing insulation from fine wires

Jack, W8TEE
 

How much trouble would I be in if I said you appear to be a professional stripper?

Jack, W8TEE

On Friday, July 6, 2018, 12:13:54 PM EDT, Gwen Patton <ardrhi@...> wrote:


For enameled wire such as magnet wire, I use extra fine sandpaper when there's enough length. If it's extra-tough lacquer, I use a lighter. Recently, I tested the electric arc lighter I picked up because it looked nifty (I don't smoke) and could be recharged via USB, and it removed the lacquer right the heck now. Heavier gauge magnet wire is a little harder to de-lacquer using this method, but it does work. Hold the wire with pliers, not your fingers, though.

Other wire, it depends on the thickness and type of insulation. PVC insulation on thin wires I used to strip with my teeth, but given that I'm a lot older now, I don't put my teeth through that lest I loosen them inadvertently. Careful stripping with a pair of diagonal cutters, flush cutters, or the wire-cutter on a pair of needle-nose pliers works most of the time, except when I squeeze it too tightly and clip the end off. Murphy's Law tends to cause this when you just went to a lot of trouble to prepare the wire and you don't have a lot of extra length, such as when soldering thin coax to a connector. If you have lots of extra length, it'll strip perfectly without effort. But when it matters, you'll probably nip off the end at least once.

My pocketknife works for most wire, and I'm used to doing it carefully, so I don't nick the wire, though removing the outer jacket on coax does usually result in a couple of shield braid strands getting nicked.

I have the cheap strippers with little gauge-marked holes that simply never work and shouldn't be purchased as they're a waste of money. Get a good spring-controlled stripper or one with an adjustable gauge on it instead.


Re: Removing insulation from fine wires

Robert Ogburn
 

On Fri, Jul 6, 2018 at 09:13 am, Gwen Patton wrote  ".....electric arc lighter"
thanks for the lead!