Search found 133 matches

by James
Fri Oct 24, 2014 5:10 pm
Forum: Assorted Stuff
Topic: Next Owston 1-2 November 2014
Replies: 214
Views: 73363

Hi Guys,

I am moving house in the next few weeks so I to am going to have to give this one a miss. Every minute is used preparing at the moment so a weekend away just isn't going to happen! Hope to make the next one!

James.
by James
Fri Jul 04, 2014 7:01 pm
Forum: Assorted Stuff
Topic: Next Owston 1-2 November 2014
Replies: 214
Views: 73363

Yes Please :)
by James
Mon Jun 16, 2014 1:15 pm
Forum: Computer Audio
Topic: Pete Millett ATEST
Replies: 74
Views: 84970

Yeah, the C variant. I knew before I built it that its not exactly a hi-end bit of kit but it seems like a good simple way into USB linked multifunction measurements. I'll say again... I have NO experience in this area at all! :lol: The sound card (M-Audio Transit 24/96) I'd like to use with the AT...
by James
Tue Feb 11, 2014 8:12 am
Forum: Assorted Stuff
Topic: What I did at NASA
Replies: 22
Views: 15087

Hi Greg,

Voyage by Stephen Baxter is an interesting look at the way things may have gone should the Apollo program have continued instead of the space shuttle.

Recommended!

James.
by James
Thu Jan 02, 2014 4:46 pm
Forum: Everyones Projects
Topic: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Replies: 1182
Views: 413270

Andrew,

Still in for six, I can only imagine needing the lower current ones however happy to split with the higher current if it helps make the numbers work.

Best Regards,

James.
by James
Mon Dec 09, 2013 8:23 pm
Forum: Everyones Projects
Topic: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Replies: 1182
Views: 413270

More than happy to contribute towards the prototype board.

Best Regards,

James.
by James
Fri Nov 29, 2013 7:18 pm
Forum: Beginners
Topic: Wire strippers
Replies: 14
Views: 10931

I personally like these. One of the few I have tried that do not have issues with PTFE.

http://www.apogeekits.com/images/wire_s ... 00-003.jpg

Best Regards

James.
by James
Wed Sep 25, 2013 1:00 pm
Forum: Beginners
Topic: more smps
Replies: 21
Views: 14122

Post 590 :)
by James
Wed Sep 25, 2013 12:57 pm
Forum: Beginners
Topic: more smps
Replies: 21
Views: 14122

Hi Ed, SMPS tend to be quite "leaky" and this will cause the PSU ground to lift if not connected to the mains (safety) ground. I think you will need to connect the earth for the EMC filter (Y) capacitors to function correctly It may be worth checking outs Rod's comments on powering his reg...
by James
Thu Aug 01, 2013 7:54 pm
Forum: Beginners
Topic: Closeness of O/P valve, mains and O/P transformer
Replies: 34
Views: 19578

Greg,

Flux band should look something like this, a more representative picture than the last one.

James.
by James
Thu Aug 01, 2013 7:49 pm
Forum: Beginners
Topic: Closeness of O/P valve, mains and O/P transformer
Replies: 34
Views: 19578

Greg,

I do you have insulating top hats installed on the mains TX core bolts?

Circulating currents could reduce the saturation margin making the mains TX more susceptible to this sort of issue.

James.
by James
Thu Aug 01, 2013 7:27 pm
Forum: Beginners
Topic: Closeness of O/P valve, mains and O/P transformer
Replies: 34
Views: 19578

Greg.

See PM.

James.
by James
Thu Aug 01, 2013 8:04 am
Forum: Beginners
Topic: Closeness of O/P valve, mains and O/P transformer
Replies: 34
Views: 19578

Failing that,

You could try some copper tape as a flux damper band.

Ensure loop continuity with a small solder joint in the end of the tape.

James.
by James
Thu Aug 01, 2013 7:56 am
Forum: Beginners
Topic: Closeness of O/P valve, mains and O/P transformer
Replies: 34
Views: 19578

Hi Greg. The only explanation I can think of is that the magnetic flux leakage from the output tx air gap ( due to the dc in the opt tx)is coupling into the mains tx due to proximity pushing it towards saturation. I know you have tried different orientations but have you tried ensuring the air gap i...
by James
Mon Jul 29, 2013 4:03 pm
Forum: Everyones Projects
Topic: Building the uTracer
Replies: 154
Views: 105122

[quote="Paul Barker"]The uTracer met the Terminator today, seen here lying in state together. the funeral will be held at 4 oclock on Friday at the Crematorium. http://i194.photobucket.com/albums/z10/v1505guy/20130729_153008_zps22c5d49a.jpg Unless it is a simple matter of replacing the MJE...