Search found 3979 matches

by Andrew
Wed Jul 19, 2017 10:13 pm
Forum: Beginners
Topic: CC Source in a Spud?
Replies: 86
Views: 1964

Re: CC Source in a Spud?

Be interesting to hear which you prefer CCS or choke, both have their advocates, advantages and compromises.

The great thing about a Spud, for me, is it's so easy to try different stuff and see what floats yer boat.

Andrew
by Andrew
Sat Jul 15, 2017 6:46 pm
Forum: Beginners
Topic: CC Source in a Spud?
Replies: 86
Views: 1964

Re: CC Source in a Spud?

Yes, Nick's right, it was wound for parafeed, hence no gap, so more inductance and hopefully better bass.

The 6C45 was shunt regulated too.

Andrew
by Andrew
Sat Jul 15, 2017 4:02 pm
Forum: Beginners
Topic: CC Source in a Spud?
Replies: 86
Views: 1964

Re: CC Source in a Spud?

No input TX, 6C45 was CCS loaded into a para-fed and gapless output TX.

hope that helps.

Andrew
by Andrew
Thu Jun 01, 2017 1:32 pm
Forum: Assorted Stuff
Topic: Audio Talk meet Owston, Doncaster, 10&11 june 17
Replies: 316
Views: 11830

Re: Audio Talk meet Owston, Doncaster, 10&11 june 17

Me, Saturday, please. I believe think Colin will be joining us too.

Andrew
by Andrew
Tue May 30, 2017 8:52 am
Forum: Beginners
Topic: who would build me a Geddon clone ?
Replies: 11
Views: 716

Re: who would build me a Geddon clone ?

Linn's Valhalla doesn't have a transformer, its "off line", which saves on both cost (to Linn's benefit, I suspect) and eliminates a source of radiated EM noise as the Valhalla board goes under the platter; 33 only. Someone does a modern clone of the Valhalla, that does both 33 and 45, again its off...
by Andrew
Tue May 09, 2017 12:47 pm
Forum: Speakers
Topic: Alpair 12P vs 12PW
Replies: 21
Views: 1480

Re: Alpair 12P vs 12PW

My favourite full ranger, that's for sure.

Andrew
by Andrew
Thu Apr 20, 2017 7:13 pm
Forum: Everyones Projects
Topic: My take on a heater supply...
Replies: 51
Views: 2446

Re: My take on a heater supply...

No block diagram as travelling, but three key stages: ideal rectifier, SMPS pre-regulator, final ultra-low-noise linear regulator. Programmable slow-start and shutdown, opto-isolated enable input and power good out (for daisy​-chaining). That makes a lot of sense as a block diagram, thanks. Opto is...
by Andrew
Tue Apr 18, 2017 9:18 pm
Forum: Everyones Projects
Topic: My take on a heater supply...
Replies: 51
Views: 2446

Re: My take on a heater supply...

A postfix linear regulator (or buck-boost pre-regulation) neatly addresses most of these compromises, but it's very hard to get the balance right... Hi Nick, I'm a bit unsure of what you mean here by postfix and pre-reg, could you elaborate, please? I think I have a picture in my head of what you'r...
by Andrew
Sat Apr 15, 2017 6:44 pm
Forum: Everyones Projects
Topic: My take on a heater supply...
Replies: 51
Views: 2446

Re: My take on a heater supply...

jack wrote:
Wed Apr 12, 2017 3:21 pm
Seems that I can only add three attachments to a post, so here is an LTspiceXVII simulation run of the ramp gen - the output current of the board follows this precisely.
Hi Nick,

Couldn't you use a buck-boost switcher that has a ramp generated slow start on it?

cheers,

Andrew
by Andrew
Sun Apr 09, 2017 7:40 pm
Forum: Assorted Stuff
Topic: Hot and dry holiday destination.
Replies: 167
Views: 6412

Re: Hot and dry holiday destination.

shane wrote:
Sun Apr 09, 2017 2:18 pm
Mornington Crescent!
Seems you win, Shane. My money was on Dave, but you snuck in.
by Andrew
Sun Apr 09, 2017 1:13 pm
Forum: Assorted Stuff
Topic: Hot and dry holiday destination.
Replies: 167
Views: 6412

Re: Hot and dry holiday destination.

Auchtermuckty?
by Andrew
Sun Apr 09, 2017 9:05 am
Forum: Assorted Stuff
Topic: Hot and dry holiday destination.
Replies: 167
Views: 6412

Re: Hot and dry holiday destination.

Malta?
by Andrew
Sat Apr 08, 2017 10:47 am
Forum: Assorted Stuff
Topic: Owston meet 2017 10th june?
Replies: 75
Views: 3998

Re: Owston meet 2017 10th june?

jack wrote:
Wed Mar 29, 2017 3:02 pm
cressy wrote:
Wed Mar 29, 2017 2:40 pm
Tracey who runs the shop...

PS. Yes, I know that two of the eleven Chunnel TBMs were called Sharon & Tracey. The Americans had one called Brenda.
What about Faith, heard she can move mountains ;)
by Andrew
Tue Apr 04, 2017 1:37 pm
Forum: General Vinyl
Topic: New TT at Brook House
Replies: 5
Views: 531

Re: New TT at Brook House

Lovely
by Andrew
Mon Apr 03, 2017 5:39 pm
Forum: Everyones Projects
Topic: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Replies: 840
Views: 56900

Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

Max, I've had a rummage. Ok, so you could use the small or big board, depends if want heatsink on pcb or connect heatsink to an external case. Electrically they are the same, save the heat sink and two more smoothing caps on the heatsink to case version, really done for 2A3. I'm getting low now, but...