Saturday, 10 February 2018

A SWR power bridge for uBITX

A damp cold Saturday here at Rugeley, the postman has not long been and dropped off my January issue of QRP Quarterly- Journal of the QRP ARCI.

Something good has just caught my eye, especially if your into the uBITX right now.

This month there is an excellent article for a VSWR bridge for the Arduino, which confusingly KW5GP (Glen Popiel) appears to take all the credits? But it appears the article was written or most of it by KV4QB (DuWayne Schmidlkofer)? A better explaination of the confusion, might be to just nip down to DuWayne's Place  to understand what has actually gone on.


Why is this article good for the uBITX builder or users? Well at the moment there is no SWR/PWR bridge hardware built into the uBITX, although VU2ESE's Arduino code does appear to implement something for a basic S meter.

The article has  a full bridge directional coupler circuit, along with amplified outputs, which are then fed into the Arduino. Along with this, there is the code, that could be easily adapted to work with the uBITX Arduino. Anyway Duwayne, has been good enough to drop off the details along with the code at his Dropbox site here  

Saturday, 20 January 2018

BITX & uBITX resources added.



I have now added a Pages link to my blog titled

BITX & uBITX resources.


Access it from the top right handside of my Blog. 


This contains known links to groups, and support for the BITX and uBITX kits.

I will update links and details as and when I see new information appear, and of course when I have the time available.

If you know of any others please drop me a line below.


You can also access it via this link below too:


http://g1kqh.blogspot.co.uk/p/blog-page.html


73 Steve

Tuesday, 16 January 2018

M328 LCR-T4 an updated version of M328 LCR Transistor tester.


I wrote about the original M328 Chinese kit sometime ago, which I had to build to prove to myself that VK3YE's capacitance offset error problem was a calibration error:


http://g1kqh.blogspot.co.uk/2015/02/building-m328-component-tester-1.html



http://g1kqh.blogspot.co.uk/2015/02/building-m328-component-tester-2.html


However there is now a newer pre built SMD version (M328 LCR-T4) which came into my hands recently, all that you have to do is kit it together with a prebuilt case  and a 9V battery NO SOLDERING: (Cost less than £8 inc case inc delivery).


This version has the advantage of being ready built with ZIF skt, and supports a better LCD full sized display!







I like this for it's ability to identify "any" transistor, or diode, you seem to throw at it.  Displaying the gain figures of, and whatever way around the device is plugged into the ZIF socket, it has the ability to identify the pin out configuration, and if it is PNP or NPN, or even a FET. so you do not have to keep getting the semiconductor book out or downloading the data sheet for the pin data.





I thought this version was so good! I got G4WIF of the GQRP club recently to include it into the new Tribal Knowledge - Test Equipment document here

Tuesday, 12 December 2017

uBITX now on back order.

The uBITX kit as I predicted, proved so successful when it went on sale on Saturday 9th December, by Monday 11th, Asharr Farhan was telling us all on the BITX20 group, current stock of the first uBITX production run was exhausted!


Demand has just outstripped supply, by what the thinking was there was enough stock to last for 2 months?




Anyone ordering the uBITX now, will not get shipped until after at least the 25th December. This is now being flagged up when you come to order.

Did the uBITX  become more successful overnight than the ICOM IC-7300, did it sell more in it's first days of sale? Or does it say to the main three radio manufacturers, you missed a market for a plain no bells and whistles multiband radio that everyone can afford and muck into and understand?

One thing for certain Asharr Farhan has proved without a doubt that he has been the first to achieve and do this, putting into mass production a multiband rig at a price point that everyone can be part of and enjoy! I am sure as well as the uBITX there is a lot more to come from HF Signals in the future!


Well done VU2ESE!

Saturday, 9 December 2017

uBitx price $109 !!



It's a fast and changing world and it appears I cannot write things quick enough at the game of Amateur Radio Blogging!


uBitx pcb complete with plug in display and raduino.


Tony G4WIF has just pointed me to the price of $109 for the uBitx and a new website!

I have just read what Asharr Farhan has said on the BITX20 group. The price will rise to $129 after Christmas, due to production costs, hiring more people etc. 



Of course I have just ordered mine!


Checkout here for details: http://www.hfsignals.com/index.php/ubitx/


Hope you all enjoy getting one just as much as I enjoy writing about these things.



73 Steve

uBitx multiband HF


A  new HF transceiver from India is about to take to market, offering multiband operation 10 through to 80metres, with the inclusion of the WARC bands and general coverage receive.

Asharr Farhan the designer of the BITX20 and BITX40 has been working on the uBitx project for quite sometime.  Demonstrations, and circuit details have been made available freely to anyone on his website Phonestack.com since early Spring 2017, for those who wished to scratch build the transceiver.

But Farhan, not resting on his recent success of producing the single band BITX40 (40m) transceiver, that introduced many to HF for a small price point of "$59" including a recent addition of stable DDS, which he called the Raduino. VU2ESE has now put the uBitx into production, and I understand will be made available soon from his HF Signals website for purchase. (Currently the website only shows the current 40m radio for sale).


Above, a recent tested production run of uBitx transceiver boards.


The uBitx will offer CW and SSB, with 10W output from a pair of IRF510's.  Arduino derived stable DDS using a Si5351 for all the local oscillators.

What you will get in the package will be a fully built and tested board.  My guess is it will be sold with a similar hardware package that was included with the BITX40, which will include the wiring hardware, connectors, pots, power and BNC connectors for the antenna etc. All you will have to do is wire it up, add a speaker and a case to complete the project.


The price for the uBitx has yet to be announced? But again my guess is it will be one of it's major success stories that will take the HF world by storm and introduce many to the affordable world of HF operation. Of course, I expect it will cost more than the BITX40, but you will be getting access to most of the HF spectrum, for something until now that has proved undeliverable to those on small budgets. 

Exciting times, keep watching HF Signals for further details.




Wednesday, 8 November 2017

The latest 1/4W 1% resistor deals


Resistor deals just get better!

Last time I looked over selling websites it was a 2000 deal, but I have now found a couple of 2500 1/4W 1% metal film Res bargains.

First one is the Chinese site Banggood @ £7.42 (US $9.51) plus a 12% voucher popped up, which you have to bop in at the time of placing the order, taking the price down to a penny pinching £6.53

https://www.banggood.com/2500Pcs-1-14W-0_25W-Metal-Film-Resistor-50-Values-Assortment-Kit-110M-Range-p-1079638.html?rmmds=category&cur_warehouse=CN


I then run the details through ebay and a similar package came out at £6.99 ($9.18):

https://www.ebay.co.uk/itm/2500-Pcs-1-4w-1-Metal-Film-Resistor-Kit-50-Values-Assortment-Pack-Mix-Selection/382146134127?hash=item58f9af406f:g:OT8AAOSwyWZZVqNd


* Please note I have no connection with either company, I just do this for service for you Hams and constructors. £ to $ conversion is done at the time, and can change with currency fluctuations.


Good luck!