Search found 9015 matches

by Paul Barker
Tue May 28, 2024 5:05 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16535
Views: 4928964

Re: Nothing In Particular

There's a lot of working going on in the background around mitigating the risks from our over dependence on GNSS (Global Navigation Satellite System, of which GPS is one of several systems) with respect to PNT (Position, Navigation, Time). https://www.gov.uk/government/news/critical-services-to-be-...
by Paul Barker
Sat May 25, 2024 10:36 am
Forum: Jokes
Topic: A little light humour
Replies: 2731
Views: 1248397

Re: A little light humour

Image
by Paul Barker
Fri May 24, 2024 5:39 pm
Forum: Everyones Projects
Topic: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.
Replies: 19
Views: 1359

Re: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.

Just measuring the curves its rp of 1k the vade mecum has the u as 5.9 S5.6 mA/V The considerable more expensive version is 6AV5-GA (mainly because it was “discovered” on a couple of forums that RSA said it could be used as a 2a3 and as a series pass regulator. The mu the vade mecum has for that val...
by Paul Barker
Fri May 24, 2024 5:13 pm
Forum: Everyones Projects
Topic: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.
Replies: 19
Views: 1359

Re: Distortion 2 to 3 W DHT,IDHT,Multigrid idht.

Here is a bargain to consider 6AU5 Ive ordered 4 for £22 delivered that is £5.50 per valve UK 2nd Class Royal Mail. Its the same valve as a now populard valve to use in place of a 2a3 octal base though. I found the triode curves its the same electrically as a popular valve that was picked up by foru...
by Paul Barker
Thu May 23, 2024 11:25 am
Forum: Assorted Stuff
Topic: Zero emission road vehicles.
Replies: 935
Views: 431508

Re: Zero emission road vehicles.

Its a van
by Paul Barker
Thu May 23, 2024 8:02 am
Forum: Assorted Stuff
Topic: Zero emission road vehicles.
Replies: 935
Views: 431508

Re: Zero emission road vehicles.

I recently re-took my 5 year gas exams. The instructor sad The VW full electric Transporter only has a 50 mile range in winter.🥶 and I guess if you use the battery power for heating less. Best dress up warm when you go back to the van to the next job. But because of encouragements to corporations if...
by Paul Barker
Tue May 21, 2024 11:41 am
Forum: Everyones Projects
Topic: EL36 SE Triode from ETF 2006 build
Replies: 12
Views: 832

Re: EL36 SE Triode from ETF 2006 build

https://i.postimg.cc/CxZyZqpj/IMG-9293.jpg https://i.postimg.cc/zDjY4NkR/IMG-9294.jpg Here is a refresher of the cirquit. And a layout that may just fit togather. As this stands all big items on top. I wanted to make it compact for home listeing in living room on kef bookshelf speaker on stands. Th...
by Paul Barker
Mon May 20, 2024 4:17 pm
Forum: General Vinyl
Topic: 60Hz oscillator for turntables (also produces three phase)
Replies: 17
Views: 993

Re: 60Hz oscillator for turntables (also produces three phase)

Once you have to voltage amplify may aswell forget the behringer and build 3 class B push pull valve amps with a choke load on the output delivering direct to the three phases of the motor at 400v per phase. Whichever way you look at it chokes / autoformers are involved. Might be better to buy a rot...
by Paul Barker
Mon May 20, 2024 4:04 pm
Forum: General Vinyl
Topic: 60Hz oscillator for turntables (also produces three phase)
Replies: 17
Views: 993

Re: 60Hz oscillator for turntables (also produces three phase)

So I have to step up 56 to 400. Simplest route is a three phase 400v autoformer if there is such a thing. Its looking out of my price range.
by Paul Barker
Mon May 20, 2024 2:43 pm
Forum: General Vinyl
Topic: 60Hz oscillator for turntables (also produces three phase)
Replies: 17
Views: 993

Re: 60Hz oscillator for turntables (also produces three phase)

Nick wrote: Mon May 20, 2024 12:37 pm Three phases from Morgans circuit + one of these

https://www.behringer.com/product.html? ... e=0105-ABE

And three step up autoformers to match the motor voltage should do the job.
Ref step up transformers any idea what outlet voltage of behringer for audio might go to?
by Paul Barker
Mon May 20, 2024 2:34 pm
Forum: General Vinyl
Topic: 60Hz oscillator for turntables (also produces three phase)
Replies: 17
Views: 993

Re: 60Hz oscillator for turntables (also produces three phase)

Not bad price and probably perfect power wise better than inverter.
by Paul Barker
Mon May 20, 2024 7:43 am
Forum: General Vinyl
Topic: 60Hz oscillator for turntables (also produces three phase)
Replies: 17
Views: 993

Re: 60Hz oscillator for turntables (also produces three phase)

I think making a three phase turntable has more chance of success than fixing my machine tools problems. My uncle has bigger better more automated machine tools. But they wont come to me. He has step children who will inherit, and you will see them on the Yorkshire Auction House TV program. Oh yes h...
by Paul Barker
Mon May 20, 2024 7:26 am
Forum: General Vinyl
Topic: 60Hz oscillator for turntables (also produces three phase)
Replies: 17
Views: 993

Re: 60Hz oscillator for turntables (also produces three phase)

I beg you’re pardon my laithe is only an L5. At the moment though it needs a better motor. The problem is that most motors available run twice the speed an old laithe like this was designed for. I guess if I google the issue I’ll find my answer. I suppose I could always half the speed with a differe...
by Paul Barker
Sat May 18, 2024 8:33 pm
Forum: General Vinyl
Topic: 60Hz oscillator for turntables (also produces three phase)
Replies: 17
Views: 993

Re: 60Hz oscillator for turntables (also produces three phase)

Not trying to be clever but I have a Harrison vertical Milling Machine that is three phase which Im tricking with a capacitor to start a false phase, and boosed the voltage with a giant transformer wound with 3mm diameter winding wire but though it works its never as good a true three phaseI I could...