Its never been cheaper to get into Ham Radio! 3 to 30Mhz Xcvr for $109 US

Started by caulktel, December 11, 2017, 08:32:22 am

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gil

QuoteCheck this out, and have your wallet ready......


You f--ker, LOL! Well done.

Maybe I should get a similar case for my BitX40 still in its plastic box and not spend $100, but if I get some extra $ why not...

Gil.

Andywragg

I would have thought the BiTX40 would drop into the uBTX case with the addition of maybe a few different standoff holes.

You could certainly still use the front and rear IO boards with a bit of figuring out for the BiTX40 wiring loom.

Or you could get the uBITX and has access to more bands and increased functionality.


Kerching!!
Once a 'STAB in the Dark'
M6UAW

gil

There are a few radios I want to buy at the moment...


  • The uBitX, why not...

  • Weber MTR4b.

  • MFJ-9402X.

  • RT-351, brand new!

  • VRM-5080.



I have 110 items on my eBay Watch List, LOL.

Gil.

Sparks

Quote from: gil on June 25, 2018, 12:40:47 pm
There are a few radios I want to buy at the moment...


What about the Yaesu FT-817ND? Have you get one already? You have often stated that you'd like to own one, if memory serves me right.

https://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=102&encProdID=06014CD0AFA0702B25B12AB4DC9C0D27

What about this one?: https://www.universal-radio.com/catalog/hamhf/0818.html

gil

Never but yes, I would like one too!

Gil

Sent from my SM-G928F using Tapatalk


caulktel

I ordered another uBitx, it should be here in a few days. It will be the V4 board with some improvements incorporated into the new PCB. I will be using a 3.2 inch Nextion touch screen display on this one.
I'm going to make numerous case improvements to this one, like bolting the finals to the case for better heat dispersion. Gil, you wont like this one because it's going to have a higher idle current draw than the previous one, but it isn't intended for portable use.
I look forward to starting work on it. Ill post my progress.

Joel
N6ALT

gil

Looking forward to see the results!

Gil

Sent from my SM-G928F using Tapatalk


caulktel

Don't know if any of you have been following the debacle going on over at the bitx20.io group regarding the uBitx, but those few fortunate people who have quality Spectrum Analyzers and know how to use them, have found that the uBitx 'mostly' does not pass FCC specs, (US), for spectral purity, (some nasty spurs). Some are advising not to use them on the air until some kind of fix is figured out. Funny I have been using mine every since they came out and nobody has knocked at my door yet, but I don't want them to either. All of the EE's on the group are seeking to redesign the uBitx to meet specs. I find this whole thing to be rather disheartening after all the time and effort I put into my two radios. They are talking about cutting the traces going to the LPF section and adding a daughter board with a new LPF design to fixed the existing boards. Not quite sure what to do but wait and see what everybody comes up with. :( :-[ :-\

Joel
N6ALT

N1KTJ

Has anyone been using it with digital modes in any context ?

N1KTJ


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caulktel

Oh yeah, a lot of guys doing FT8 and other modes. I'm just not in to digital modes so I haven't paid much attention to it.

Joel
N6ALT

Andywragg

Quote from: caulktel on August 17, 2018, 10:22:32 am
Don't know if any of you have been following the debacle going on over at the bitx20.io group regarding the uBitx, but those few fortunate people who have quality Spectrum Analyzers and know how to use them, have found that the uBitx 'mostly' does not pass FCC specs, (US), for spectral purity, (some nasty spurs). Some are advising not to use them on the air until some kind of fix is figured out. Funny I have been using mine every since they came out and nobody has knocked at my door yet, but I don't want them to either. All of the EE's on the group are seeking to redesign the uBitx to meet specs. I find this whole thing to be rather disheartening after all the time and effort I put into my two radios. They are talking about cutting the traces going to the LPF section and adding a daughter board with a new LPF design to fixed the existing boards. Not quite sure what to do but wait and see what everybody comes up with. :( :-[ :-\

Joel
N6ALT


Well I just read through all that..... What a let down!! Although I have had mine checked over for harmonics by an electronics specialist and it was passed  good. Nice to know mine at least isnt typical of the rest.


Once a 'STAB in the Dark'
M6UAW

ELK

Quote from: caulktel on July 20, 2018, 10:53:01 am
I ordered another uBitx, it should be here in a few days. It will be the V4 board with some improvements incorporated into the new PCB. I will be using a 3.2 inch Nextion touch screen display on this one.
I'm going to make numerous case improvements to this one, like bolting the finals to the case for better heat dispersion. Gil, you wont like this one because it's going to have a higher idle current draw than the previous one, but it isn't intended for portable use.
I look forward to starting work on it. Ill post my progress.

Joel
N6ALT


Be careful with the finals. If I recall well, the IRF510's back is connected to the drain, which is not "groundable". If you want to bolt them to the case, don't forget to use TO220 insulation kits  ;)


73's, Stan.

ELK

Quote from: caulktel on August 17, 2018, 10:22:32 am
Don't know if any of you have been following the debacle going on over at the bitx20.io group regarding the uBitx, but those few fortunate people who have quality Spectrum Analyzers and know how to use them, have found that the uBitx 'mostly' does not pass FCC specs, (US), for spectral purity, (some nasty spurs). Some are advising not to use them on the air until some kind of fix is figured out. Funny I have been using mine every since they came out and nobody has knocked at my door yet, but I don't want them to either. All of the EE's on the group are seeking to redesign the uBitx to meet specs. I find this whole thing to be rather disheartening after all the time and effort I put into my two radios. They are talking about cutting the traces going to the LPF section and adding a daughter board with a new LPF design to fixed the existing boards. Not quite sure what to do but wait and see what everybody comes up with. :( :-[ :-\

Joel
N6ALT


I own a µBitX but I'am not a subscriber of this group. Did they say anything about the frequencies of those spurs ? Are they over 30 MHz  ? In this case, an external third order LPF (at the cost of a few dB of power loss) might do the job...

73's, Stan.

caulktel

Hi Stan,

I am aware about insulating the IRF510's from ground, I have done this on all 5 of my Bitx builds.

As far as the harmonic/spur problems of the uBitx are concerned, its far too complicated for me to explain, and due to the fact that no two people can agree to anything on that group, it muddys  the water even further. Suffice it to say, something needs to be done and I'm waiting to see what Farhan comes up with, he always seem to find a simple solution to problems as opposed to these people that want to start from scratch and completely redesign the radio.

Joel
N6ALT

caulktel

Stan,

Sorry, I meant to direct you to http://ubitx.net/ for more info regarding the uBitx problem. Farhan's rebuttal is there. Personally I don't think this is as big a problem as some individuals are trying to make us believe. I still use mine everyday.

Joel
N6ALT