Andy, Well, that's over my head. I did get some PCB's from a Chinese firm using these files, but as I've not built it up yet, I have no idea whether or not it's done right. I have no problems reading schematics, but I'm out of my league when it comes to designing a PCB from a schematic.
Ben - K6QV
|
Re: Initial spectrum test on the V5 with my new spectrum analyzer
#ubitx
Once again,
Yes Jim I understand that.? I thought you/we/someone might be interested in seeing the improvements in the new version.
Anyway, your tests are fun to see.? Thanks for all your efforts!? It must be great to have such a nice new instrument, and I am sure there is tons to learn about all the measurements you can make with it.
73,
Mark.
|
Hi Doug
Sorry, making assumptions here.
It's the uBITX multiband radio.
I did get this a few weeks ago from HFsignals.com.
Bob
On 25/02/2019 15:12, Doug W wrote:
Bob,
What radio do you actually have?? This list covers the entire BITX
family.? The name is a hold over from Farhan's first BITX, the 20.?
You referred to a BITX20 kit delivered via India post so I am
assuming you bought it from HFsignals.com.? If that is correct,
they currently sell two transceivers neither of which is the BITX20.?
The BITX40 that covers the 40m band and the ?BITX
that is a multi band radio.? There are also BITX20 kits in the
wild so I may be off base in my assumptions.? Either way, once we
know what you have we can be of more help.
--
--
Bob Head, Rotronics Systems Limited, 01252 722686
|
No paste
No problem? Sorry to hear about your friend.?
Thanks for the status update
Dan W3BU
toggle quoted message
Show quoted text
On Feb 25, 2019, at 2:26 AM, N8DAH < Dherron@...> wrote: Just wanted to update people on the status of this. We had a delay at the fab house, boards are in product and we hope to have them soon!
I have had a death of a very close friend and will be out of town this coming weekend. If you have any questions please e-mail info@... and Tim or myself will be able to get back with you.
I truly apologize for the delay, we will have more ready once they arrive and we fulfill the pre-orders.
--
David
?N8DAH
|
Bob,
What radio do you actually have?? This list covers the entire BITX family.? The name is a hold over from Farhan's first BITX, the 20.? You referred to a BITX20 kit delivered via India post so I am assuming you bought it from HFsignals.com.? If that is correct, they currently sell two transceivers neither of which is the BITX20.? The BITX40 that covers the 40m band and the ?BITX that is a multi band radio.? There are also BITX20 kits in the wild so I may be off base in my assumptions.? Either way, once we know what you have we can be of more help.
--
|
Re: Initial spectrum test on the V5 with my new spectrum analyzer
#ubitx
All, I was going to say "let someone who operates SSB do this", as I don't even have the microphone audio connected on any of my uBITX radios, but I came to the conclusion that I'd be doing the group a disservice by not doing all the testing. ?Also, there have been several comments from people saying my results were quite different from theirs, but they were comparing the older V3 boards to what I posted for the NEW Version 5's. ?
I do not currently have a two-tone test generator, so I just ordered a kit from "Pacific Antenna" for $49.50 ($45 plus $4.50 shipping). ?When that gets here and I get it built (may be a couple weeks) I'll connect the microphone audio to a front panel jack on my "ugly open frame V5" and run the two tone test to see if I can't capture any spurs on screen (I'm sure there will be some - hopefully minimal) and post them here.
I'm still learning the SSA3021x, so if anyone on this list has the same SA and knows how to properly set it up to measure the spurs from such a two tone test, I'd appreciate some setup info. That would help get me in the right area and I surely would learn something new. ?At almost 77, that is easy to do, but retention of the information is the difficult part - LOL.
Please remember, I have a Siglent SSA 3021x, NOT a RIGOL and setup for the RIGOL will almost certainly be different (how much I don't know) from the Siglent.
I'm trying to get this stuff right and be objective rather than alarming. ?I'm not sure I had all the settings right on the preliminary harmonic tests and plan on re-running them (with subsequent posts here) so people can compare the readings. ?My original spectrum analyzer was an old GW Instek GSP-810 and it was quite limited in what you could set it up to do. Also it had come out of a Tech School environment so it's calibration was certainly in question. ?The new SA came with a Calibration Certificate from the factory and hopefully will be much more accurate as far as measurements are concerned.
I have a second V5 uBITX on order and it has been shipped. ?DHL tracking shows it having left Bangalore India so it's somewhere between Bangalore and Leipzig, Germany which is the path they usually take when coming my way. ?Projected delivery date is this coming Wednesday (Central US time). ?Once I get it in a case with one of our BITeensio cards and a 3.2" Color TFT touch screen display, I'll run that one through the tests as well for comparison.
Jim Sheldon, W0EB TSW Project Coordinator
------ Original Message ------
Sent: 2/24/2019 9:18:01 PM
Subject: Re: [BITX20] Initial spectrum test on the V5 with my new spectrum analyzer #ubitx
Jim
Nice work with the new instrument.? I don't think too many of us are concerned with the frequency accuracy, relative measurements of spurious are wonderful data.
Sure start with cw, but if you have a simple audio oscillator (I use the one on 4stateqrp rf test set) others will be curious on the ssb path.
73 Curt
|
Hello all.
I've just received my new BITx20 transceiver via IndiaPost.
It arrived quicker than predicted and the 'kit' is very nicely assembled.
Checked it mechanically and all is well, toroids all connected.
Reading the notes the designer mentions 'better than 0.1uV sensitivity.'
Having lashed it together on the bench it seemed a bit deaf, I checked everything was connected as per the instructions, but still the same.
Compared sensitivity with my Yaesu and that was much more sensitive.
So out with the Marconi signal generator, the Yaesu sensitivity is about 1uV and a reasonable tone heard. The BITX20 was more like 100uV to get a reasonable tone heard.
That was at 7MHz but it's the same at other frequencies.
I'm happy to do some research, but thought I had better see if anybody out there has had a low sensitivity unit?
Thanks for any assistance,
BobM0RHE
toggle quoted message
Show quoted text
--
Bob Head, Rotronics Systems Limited, 01252 722686
|
Re: Initial spectrum test on the V5 with my new spectrum analyzer
#ubitx
Mark, You're comparing apples to oranges here. ?My tests were on the new Version 5 board with the new LPF switching sequence and new IF frequency, NOT a V3 or V4. ?
Jim
toggle quoted message
Show quoted text
On Feb 24, 2019, at 9:08 PM, Mark McNabb < n7eku@...> wrote: Hi Jim,
Good for the sampler -- wanted to make sure I was reading the pictures correctly as the print is a bit small (and doing my math correctly).
Yes, I understand you are checking for harmonics. You mentioned calibration so that got me thinking you were concerned about power accuracy.? My mistake.
If interested, you can check your results against mine.? In the files section I have a spreadsheet under my callsign with harmonics and power out measurements.
Also in the photos section under my callsign, I posted pictures of my SA measurement screen.? In all pictures I centered the fundamental near the zero reference line (2nd peak from the left).? I used a 20dB power attenuator then a selectable low power attenuator as needed.? These measurements were done with CW as well.? On a v3 board as delivered.
My 20m looked a lot different from yours.? 80, 40, and 30m showed a lot of upper harmonics getting past the LPF -- probably why there are alternate filter plans for these now and a new layout I think on your v4 board...?? There's less of this on 20m and above, but there's also way way less power.? Power max was 14.5W on 75m and goes down to 0.7W on 10m.
73,
Mark - N7EKU
|
Re: Bitx-40 - Where I Am Today
Exactly Frahan. I have never bought a commercial antenna and have always made my own including a 2 El Quad for 20, 15 and 10M.
This includes antennas from 160 to 2M, including 6 and 4M.
Have a look at a simple vertical using a fibreglass extendable fishing rod.
I used to do the MARL Magazine between 2005 - 2011 in both Maltese and English, but then other priorities and lack of time took over. You can go to? and download all the issues? Regards Lawrence
On Mon, Feb 25, 2019 at 3:59 AM Ashhar Farhan < farhanbox@...> wrote: Why would you buy it? Just get 66 feet of any wire from home depot and wind your own transformer. - f
On Mon 25 Feb, 2019, 3:30 AM Truffies, < truffies@...> wrote:
look at;? ?
-----Original Message-----
>From: Donald <donwestpwl@...>
>Sent: Feb 24, 2019 2:37 PM
>To: [email protected]
>Subject: Re: [BITX20] Bitx-40 - Where I Am Today
>
>Pat,
>
>I have heard that end-fed antennas are becoming popular with RVers.
>Palomar is just one company selling them:
>
>
>
>Their site also has some information on that type of antenna.
>
>Donald, KB5PWL
>
>
>
>
|
Installing firmware KD8 CEC version 1.08 into BITX20
HI Bruce looked at the u tube of installing the new firmware .but it assumed you had the installation manual ..Can not find the? installation manual for this down load to install it into the BITX 20.can any one help ..Looks like this would solve the very low audio problem. Thanks again Will Bennett VK4WBX
|
Hi Bruce VK4GU Thanks very much for your help .much appreciated .I have a ham friend that is good with down loads .Will try it this week .Will let you know how I go .Thanks again .73 Cheers VK4WBX
|
Just wanted to update people on the status of this. We had a delay at the fab house, boards are in product and we hope to have them soon!
I have had a death of a very close friend and will be out of town this coming weekend. If you have any questions please e-mail info@... and Tim or myself will be able to get back with you.
I truly apologize for the delay, we will have more ready once they arrive and we fulfill the pre-orders.
--
David
?N8DAH
|
Re: Bitx-40 - Where I Am Today
yeah, it was the same with me. i tried making all kinds of baluns, finally, i made an 'L' tuner for the efhw. it works very well. - f?
Well, for me, I have already spent enough hours of my life
looking at different websites, to find all the pieces parts for a
project (the least enjoyable part of the process). Sometimes, I
will spend more money for an assembled project, and have more time
for radioing. It's the same reason I bought a Bitx-40 with
pre-assembled boards.
Other people may have different reasons.
On 2/24/2019 9:59 PM, Ashhar Farhan
wrote:
Why would you buy it? Just get 66 feet of any wire
from home depot and wind your own transformer.
- f
On Mon 25 Feb, 2019, 3:30 AM
Truffies, < truffies@...>
wrote:
look at;? ?
-----Original Message-----
>From: Donald <donwestpwl@...>
>Sent: Feb 24, 2019 2:37 PM
>To: [email protected]
>Subject: Re: [BITX20] Bitx-40 - Where I Am Today
>
>Pat,
>
>I have heard that end-fed antennas are becoming popular
with RVers.
>Palomar is just one company selling them:
>
>
>
>Their site also has some information on that type of
antenna.
>
>Donald, KB5PWL
>
>
>
>
|
Re: Bitx-40 - Where I Am Today
Well, for me, I have already spent enough hours of my life
looking at different websites, to find all the pieces parts for a
project (the least enjoyable part of the process). Sometimes, I
will spend more money for an assembled project, and have more time
for radioing. It's the same reason I bought a Bitx-40 with
pre-assembled boards.
Other people may have different reasons.
On 2/24/2019 9:59 PM, Ashhar Farhan
wrote:
toggle quoted message
Show quoted text
Why would you buy it? Just get 66 feet of any wire
from home depot and wind your own transformer.
- f
On Mon 25 Feb, 2019, 3:30 AM
Truffies, < truffies@...>
wrote:
look at;? ?
-----Original Message-----
>From: Donald <donwestpwl@...>
>Sent: Feb 24, 2019 2:37 PM
>To: [email protected]
>Subject: Re: [BITX20] Bitx-40 - Where I Am Today
>
>Pat,
>
>I have heard that end-fed antennas are becoming popular
with RVers.
>Palomar is just one company selling them:
>
>
>
>Their site also has some information on that type of
antenna.
>
>Donald, KB5PWL
>
>
>
>
|
Re: Bitx-40 - Where I Am Today
Yep make one!? Super easy and saves you a bunch. Just rebuilt mine today (it was really ugly before) and they works great.? Mine is a 40-10m version so it includes the 100pf cap.
Brad KG5SPR?
On Sun, Feb 24, 2019 at 11:30 PM Ken Hansen < ken@...> wrote: In case you decide to build an end-fed, here's a link to a very popular design that's simple to construct and reportedly works great:
Link:??
eHam Reviews:?? Ken, N2VIP On Feb 24, 2019, at 9:59 PM, Ashhar Farhan < farhanbox@...> wrote: Why would you buy it? Just get 66 feet of any wire from home depot and wind your own transformer. - f
|
Re: Bitx-40 - Where I Am Today
In case you decide to build an end-fed, here's a link to a very popular design that's simple to construct and reportedly works great:
Link:??
eHam Reviews:?? Ken, N2VIP
toggle quoted message
Show quoted text
On Feb 24, 2019, at 9:59 PM, Ashhar Farhan < farhanbox@...> wrote: Why would you buy it? Just get 66 feet of any wire from home depot and wind your own transformer. - f
|
Re: Bitx-40 - Where I Am Today
Right on, and thanks, Ashhar, you invented a wonderful thing in the bitx-40! It will be a simple 66 foot dipole at home!
On Sun, Feb 24, 2019 at 8:59 PM Ashhar Farhan < farhanbox@...> wrote: Why would you buy it? Just get 66 feet of any wire from home depot and wind your own transformer. - f
On Mon 25 Feb, 2019, 3:30 AM Truffies, < truffies@...> wrote:
look at;? ?
-----Original Message-----
>From: Donald <donwestpwl@...>
>Sent: Feb 24, 2019 2:37 PM
>To: [email protected]
>Subject: Re: [BITX20] Bitx-40 - Where I Am Today
>
>Pat,
>
>I have heard that end-fed antennas are becoming popular with RVers.
>Palomar is just one company selling them:
>
>
>
>Their site also has some information on that type of antenna.
>
>Donald, KB5PWL
>
>
>
>
|
Re: Bitx-40 - Where I Am Today
I don't know why many choose to buy, rather than build their own wire antennas...
Here's how to make one>??
On Sunday, February 24, 2019, 10:59:31 p.m. EST, Ashhar Farhan <farhanbox@...> wrote:
Why would you buy it? Just get 66 feet of any wire from home depot and wind your own transformer. - f
On Mon 25 Feb, 2019, 3:30 AM Truffies, < truffies@...> wrote:
look at;? ?
-----Original Message-----
>From: Donald <donwestpwl@...>
>Sent: Feb 24, 2019 2:37 PM
>To: [email protected]
>Subject: Re: [BITX20] Bitx-40 - Where I Am Today
>
>Pat,
>
>I have heard that end-fed antennas are becoming popular with RVers.
>Palomar is just one company selling them:
>
>
>
>Their site also has some information on that type of antenna.
>
>Donald, KB5PWL
>
>
>
>
|
Re: ubitx schematic cleanup
#ubitx
I've updated the page with corrections suggested by Jerry. Having watched the projects for years (time flies) it is fun to look back through the changes. feel free to update/correct it. /g/BITX20/wiki/Ubitx-Schematicstom KF5NWC
|
Re: Bitx-40 - Where I Am Today
Why would you buy it? Just get 66 feet of any wire from home depot and wind your own transformer. - f
On Mon 25 Feb, 2019, 3:30 AM Truffies, < truffies@...> wrote:
look at;? ?
-----Original Message-----
>From: Donald <donwestpwl@...>
>Sent: Feb 24, 2019 2:37 PM
>To: [email protected]
>Subject: Re: [BITX20] Bitx-40 - Where I Am Today
>
>Pat,
>
>I have heard that end-fed antennas are becoming popular with RVers.
>Palomar is just one company selling them:
>
>
>
>Their site also has some information on that type of antenna.
>
>Donald, KB5PWL
>
>
>
>
|
Jim Sheldon
N8DAH
VE3MIC