Sunday, March 29, 2009

Using Tor for BBC iPlayer Access outside the UK

A complete description on how to do this is to be found on my website. www.tempusfugit.ca

Tuesday, March 10, 2009

The Texan Amplifier

The Texan Amplifier as featured in Practical Wireless

The "Texan" featured as a test piece for my University thesis on "The subjective perception of distortion in HiFi amplifiers"
The relative significance of THD and IMD (Harmonic and Inter-modulation Distortion)



References:

I have copies of the original PW articles for the Texan Amplifier including the schematic (circuit diagram) - You can also get these from Paul Kemble.
  • Mann, R. 'The Texan 20 + 20 watt stereo amplifier'. Practical Wireless, May 1972, p 48.       
  • Paul Kemble on the Texan  - some pictures here         
  • Audio Power Amplifier Design Handbook By Douglas Self  - Preview on Google Books     
  • Rega Brio 3  - This seems to be what the Texan was used to prototype.        
  • diyAudio.com - Forum - Rega Brio (one channel dead)   
  • Paul Kemble's page on the PW Texan and the PE Rondo.  - schematics (circuit diagrams) can be found on Paul Kemble's website       
  • www.americansound.com  - store in Richmond Hill - owner Angie       
  • Paul's index page on sound www.angelfire.com sd/paulkemble/soundindex       
  • Rega Brio 3 - website       
  • consort_ee_um on diyaudio.com "Rega Brio (one channel dead)"               
                This amplifier design has an interesting history. It was originally
                designed by Texas Instruments (i think in Bedford England) as the
                "Texan" kit for "Practical Wireless" magazine back in the 1970's
    Rega borrowed the design but used more rugged output transistors than the
    original TIP41/42.                                                       
    The main feature is that the output stage has some voltage gain which allows
    the op-amp to run off low voltage supplies.                                
    I believe the original Texan design did not have quiescent current setting
    adjustment which can give the dreaded crossover distortion.
Other audio related pages on this blog:

Sunday, March 8, 2009

Torrent and Bandwidth Hogs

Why would an ISP offer accounts with 95G of bandwidth per month if they didn't have the network infrastructure to support 3 to 4GBytes of traffic per day?

To say that ISPs would rather the users of torrents go away and that this is detrimental to the other users of the network does not make sense.

Copyright infringement and DRM is another issue and will be pursued.

Saturday, March 7, 2009

Deleting pages from Google Cache

This is a new one for me! Always willing to try something new.



Question is: How long do the pages take to actually disappear from the listings?

I must admit that I hadn't added the profile for the blog to Google's Webmaster Tools (just the website)

If this works, it will be an interesting tool.

With respect to the blogger.com blog - a page that no longer exists returns what is presumed to be a "custom 404" page. It this is not the case then the removal may not work.

Friday, March 6, 2009

iPlayer using a proxy

As an experiment this morning I thought that I would try connecting to the BBC not using a VPN.

It still works. It took about a minute to find an exitnode in the UK but the play-back is perfect. If I wanted to download the program it would have been even quicker.

Thursday, March 5, 2009

Intranet

My intranet (formerly the TempusFugit Intranet)  is a local server on which I store all of the software that I own and have downloaded.

It is also where I store all the source code and drivers for the projects that I am working on and equipment that I own.


If there is a file or program that you are looking for it may be available for download.

In addition to the intranet server I have developed a "TeraByte Storage Network". It is this network that forms the storage for my Home Media Centre. This network has never been connected to the Internet and is not accessible from the outside world. Under some circumstances I have opened up my internal, intranet, and forwarded some of its contents to the Internet. In these circumstances the contents have been protected by password control and required a visitor to enter a User ID.

Links related to securing a server: