Date   

Re: V5 - Nextion Screen not work but very little ?

chuckr@hostu.org
 

I can, but still no change anywhere is accepted when press ent or other key for acceptance of change made, I suspect the nextion may be bad ...
thanks


Re: uBITX TX wattage

Curt
 

all kinds of things may be in play --

a. being conservative in 'specs' aka typical values
b. a different arrangement of the relays to get lower harmonic leakage
c. an added 45 MHz LC filter to reduce mixer spurious
d. ??

note there is some variation across the lot in output power and spurious.  most definitely I would use one or more other QRP rigs to check what your meter is conveying for output power. 

on my v4 there is a CW power dip on 40 meters, not sure how many do that.  [on my list is to install those shielded inductors to see if this improve things). 

please note that while CW and SSB use the same PA, the path to get there is different - so in our club measurements we see some variation between modes on output power (and of course spurious). 

Curt


Re: V5 - Nextion Screen not work but very little ?

Sam Tedesco
 

Hi Chuck,

Some items in the menu require additional hardware. Can you populate the cw info in the cw menu?


V5 - Nextion Screen not work but very little ?

chuckr@hostu.org
 

Hi all, just need some input to verify my problem suspicions (chinese clone screen) or not . I am not sure how all this works completely so there could well be something else amiss. Below is what I have set up and all works fine except the screen ?  The frequency shows correct and changes with the tuning knob and HRD. RX and TX change as they should, but that is all that works. I can change screens etc. but no changes made or actually conveyed to the radio. Thanks in advance for any and all help, advice, and pointers..

uBitx V5 Board
KD8CEC 1.2 Software
 
Nextion 3.5 Enhanced (chinese clone)
Sam Tedesco - ubtix_35_complete_Enhanced.tft

73
chuck


Re: N6DT AGC and S-meter

Joel Trenalone
 

Hi Rick,
I’m having the exact same problem and have made the same mistake as you (loaded the -s version). 

When you reloaded the correct firmware did you just reload it with xloader?
thanks,
joel


Re: LinAmp

 

Correction:

I meant IRF-510 and for the heatsink, I meant an old Pentium III Slot 1 type (still sold new for cheap on ebay and they have relatively quiet fans usually).

Cheers and 73,


Mark.


Re: µBITX V5 build complete (for now)

Jeff Karpinski (N0KAI)
 

Yeah, it makes firmware tweaks super-easy, plus I plan on doing a lot of FT8. Since these pics, I've found that some laptops - but not all - can cause noise on the USB line that gets into the uBITX. So, I swapped the cable shown for a longer one wrapped a few times through a toroid and problem solved. 


On Mon, Jun 17, 2019 at 06:59 PM, Sam Byrd wrote:
Hadn't thought about bringing the USB outside of the case, great idea.


Re: µBITX V5 build complete (for now)

Sam Byrd
 

Hadn't thought about bringing the USB outside of the case, great idea.


On Sun, Jun 16, 2019 at 3:20 PM Dexter N Muir <dexy@...> wrote:
Shooda thorta thet. With name Dexter, and dextral like most (and fairly dexterous), what else but Sinistral? :) a dextraneous thought there ...
73... ZL2DEX


Re: LinAmp

 

Hmm,

I don't know what would be unsafe about running the finals at higher voltage.  That is how most IRF510 amps are run.  Keep to the voltage below 28v and I think they would be pretty durable.  Maybe Alison or others could chime in on this.  Plus if they do let go, they are very cheap to replace.  

The main requirement for safe operation would be to provide a good heatsink.  But that is the case for any final.  Something like from an old Pentium III socket heatsink would be good.

73,

Mark


Re: 7.277 Sunday evening net

Jay - WS4JM
 

Nice to see that there are a few active on Sundays. I will try again around 0 hours UTC on Sunday. Hope to catch you then!

Jay
WS4JM


Re: BITX 40PARTS

Michael Shreeve
 

And yes, more details so we can help you with your BITX40


Re: BITX 40PARTS

Michael Shreeve
 

Gordon, loving JS8CALL (js8) with my uBITX . I had no choice but to learn a bunch about the raduino as I blew up my first one from the Christmas Shipment, was it 2017. That was where I surmised that I could add the header to the bitx40 raduino, put new software in it, calibrate it , and walla, it was a uBITX RADUINO, and I was back in business. One of these days I will complete the repair of the old raduino, and perhaps build a super low dc current BITX40 using the old style analog vxo ? For a backpack radio ? And do js8 with my Chuwi tablet ? 

I am just floored as to how much I have learned regarding modern low noise receivers like the uBITX,.  It is truly an amazing receiver for the money, or whatever money ! And the playlists at my youtube Channel show that it is an internationally popular radio. N6GRG, 10 watts gets me everywhere in the U.S. , rxed Japan today, JS8, and perhaps 40 is making a little come back for field day ? Hope so. Gordon, are you using a transformer based card like the "easy digi " ?


Re: BITX 40PARTS

Michael Shreeve
 

Damn Ashar, he won't create another appliance ham radio. What is wrong with that guy .hhee hhee. 


Re: LinAmp

Joe Puma
 

Yes, I believe I read that, someone if not you posted the English version here too. I even saw a chart of the swr improvement from various resistor  values. I’m gonna have to put some resistors on order for it.

 

 

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of Mark Hatch <mark2382@...>
Sent: Monday, June 17, 2019 4:45:53 PM
To: BITX20@groups.io
Subject: Re: [BITX20] LinAmp
 
Joe,

My memory is that the article in German reference below discusses the selection of a resistor to improve SWR. (This is not specified in the instructions).  BTW: The English version is an abridge version. Although I have not done the full article, you can copy the German text from the pdf and paste it into Google translate. The 2 paragraph's I tested doing this came out as very acceptable English. When I got around to this project, I was going to create a full English version for my reference.

73
Mark
AJ6CU


Re: LinAmp

Mark Hatch
 

Joe,

My memory is that the article in German reference below discusses the selection of a resistor to improve SWR. (This is not specified in the instructions).  BTW: The English version is an abridge version. Although I have not done the full article, you can copy the German text from the pdf and paste it into Google translate. The 2 paragraph's I tested doing this came out as very acceptable English. When I got around to this project, I was going to create a full English version for my reference.

73
Mark
AJ6CU


Re: BITX 40PARTS

Gordon Gibby <ggibby@...>
 

If you actually start doing that and having deployed units responding to  JS8, you could easily create a nationwide or worldwide AUTO net, providing low power, very inexpensive message relaying. 

JS8 auto station:
UBitx $130
Soundcard homebrew $20
Raspberry $40
12VDC & 5vdc power supplies
Simple dipole antenna
Free software http://js8call.com/




On Jun 17, 2019, at 16:25, Gordon Gibby <ggibby@...> wrote:

Since I have a tiny bit of time on my hands this week, I’m going to finish out another soundcard & Isolator to go on my uBitx.    I have never put it on the spectrum analyzer to see how the relays did, and I may be able to repair one of the filters that I broke  a portion.... while installing the relays

JS8 is catching our fancy in our emergency communications group, and this could be a perfect deployed unit as an AUTO relay station.  Since there is a raspberry pi version of J. S8call,  it could be perfect

I might suggest for your net, that you begin to use a JS8 frequency, such as 14078....  and a group

@UBITX

It might be interesting to see how many respond

Gordon KX4Z. 





On Jun 17, 2019, at 16:11, Michael Shreeve <shreevester@...> wrote:

The Microbitx raduino and the raduino are the same but the microbitx uses all of the pins. The 40 uses only 5. My video right here shows the two , I said four pins but its clearly 5. The programs used in the two raduinos are completely different, and make the Si synthesizer put out completely different frequencies, plus the radio has to be completely set for the different raduino if you were to change it. That said, as they come out of the factory they can be pretty close to the frequencies you need, if you use the one in the package . This video shows the two configurations for the raduinos. https://youtu.be/BQnzO4WrIFU


Re: BITX 40PARTS

Gordon Gibby <ggibby@...>
 

Since I have a tiny bit of time on my hands this week, I’m going to finish out another soundcard & Isolator to go on my uBitx.    I have never put it on the spectrum analyzer to see how the relays did, and I may be able to repair one of the filters that I broke  a portion.... while installing the relays

JS8 is catching our fancy in our emergency communications group, and this could be a perfect deployed unit as an AUTO relay station.  Since there is a raspberry pi version of J. S8call,  it could be perfect

I might suggest for your net, that you begin to use a JS8 frequency, such as 14078....  and a group

@UBITX

It might be interesting to see how many respond

Gordon KX4Z. 





On Jun 17, 2019, at 16:11, Michael Shreeve <shreevester@...> wrote:

The Microbitx raduino and the raduino are the same but the microbitx uses all of the pins. The 40 uses only 5. My video right here shows the two , I said four pins but its clearly 5. The programs used in the two raduinos are completely different, and make the Si synthesizer put out completely different frequencies, plus the radio has to be completely set for the different raduino if you were to change it. That said, as they come out of the factory they can be pretty close to the frequencies you need, if you use the one in the package . This video shows the two configurations for the raduinos. https://youtu.be/BQnzO4WrIFU


Re: BITX 40PARTS

Michael Shreeve
 

The Microbitx raduino and the raduino are the same but the microbitx uses all of the pins. The 40 uses only 5. My video right here shows the two , I said four pins but its clearly 5. The programs used in the two raduinos are completely different, and make the Si synthesizer put out completely different frequencies, plus the radio has to be completely set for the different raduino if you were to change it. That said, as they come out of the factory they can be pretty close to the frequencies you need, if you use the one in the package . This video shows the two configurations for the raduinos. https://youtu.be/BQnzO4WrIFU


Re: LinAmp

Joe Puma
 

Does R6 help with SWR?  At times I do see my SWR jump around on some bands. Otherwise its pretty low.

 

I didn’t get a r6 with my kit.

 

Sent from Mail for Windows 10

 


From: BITX20@groups.io <BITX20@groups.io> on behalf of wcurlew@... <wcurlew@...>
Sent: Monday, June 17, 2019 11:32:52 AM
To: BITX20@groups.io
Subject: Re: [BITX20] LinAmp
 
I had the same issue, so I documentred my build (warts and all) on utube. Try this and see if it helps: https://www.youtube.com/watch?v=a2PEWpgIoCY.

I do not cover r6 install, which is between the inboard pads on the smaller transformer (there is an r6 silkscreened on the board), and I briefly talk about the transistor installs but didn't do it as I didn't have a heat sink yet.

Bill (KC1JTS)


Re: BITX 40PARTS

Bill Bates
 

Here, here, here! I have the BitX 40, worked out of the box, done a few mods, good delivery time, I certainly couldn't afford any of the commercial rigs, the support group has been fantastic, more people than you could ever expect to pitch in & help you trouble shoot or do mods, far better in fact as regards after sales service than any high street radio shop that I've ever heard of! Keep up the fantastic work Ashhar Farhan! Best wishes, Bill, G6ATO


From: Ashhar Farhan
Sent: ‎17/‎06/‎2019 05:21 PM
To: BITX20@groups.io
Subject: Re: [BITX20] BITX 40PARTS

Hehe, sure. Which is why it sells a working ssb board for $59 dollars and keeps everything under GPL.
I sincerely wish someone else takes up bitx40 production. There is no copyright over any aspect. I am willing to work with you to help you produce and supply this at a better price and better customer support.
- f

On Mon 17 Jun, 2019, 10:36 AM Sudanthiram N, <vu2nsk@...> wrote:
Dear all,
The HF SIGNAL, MOTIVE IS EARNING MONEY ONLY . AFTER SALES NO SERVICE.Is there any law,a small business concern will not give any  assistance to the buyer?. I also sent a enquiry to HF SIGNAL.BUT NO REPLY.
 
THANKS & REGARDS
VU2NSK

On Mon, 17 Jun 2019, 7:00 am Curt via Groups.Io, <wb8yyy=yahoo.com@groups.io> wrote:
Hfsignals is a small business, not full time, he patient. Do discern what is really missing.

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