Search found 11188 matches

by Nick
Wed Jul 11, 2018 10:08 am
Forum: Assorted Stuff
Topic: Yorkshire Hi-Fi Club
Replies: 404
Views: 25280

Re: Yorkshire Hi-Fi Club

My optimism is now getting a bit restricted, so I have preemptively deleted that user.
by Nick
Tue Jul 10, 2018 8:19 pm
Forum: Solid State
Topic: Slagle AVC, needs a check up.
Replies: 4
Views: 86

Re: Slagle AVC, needs a check up.

I a, happy to take a look, but I don’t meet the "East Anglia, Cambs, Beds, Essex area" requirements otherwise I would have offered.
by Nick
Tue Jul 10, 2018 8:36 am
Forum: Assorted Stuff
Topic: Yorkshire Hi-Fi Club
Replies: 404
Views: 25280

Re: Yorkshire Hi-Fi Club

pre65 wrote:
Tue Jul 10, 2018 6:17 am
would it be possible to alter or disguise the C word on the two relevant posts Nick ?
It will still be there in your head.
by Nick
Mon Jul 09, 2018 11:42 pm
Forum: Assorted Stuff
Topic: Yorkshire Hi-Fi Club
Replies: 404
Views: 25280

Re: Yorkshire Hi-Fi Club

Done.
by Nick
Fri Jul 06, 2018 11:31 am
Forum: Beginners
Topic: Negative grid current WTF?
Replies: 21
Views: 379

Re: Negative grid current WTF?

Only the amplitude.
by Nick
Thu Jul 05, 2018 11:08 pm
Forum: Beginners
Topic: Negative grid current WTF?
Replies: 21
Views: 379

Re: Negative grid current WTF?

However if it was 20kHz, then any result that damps it will likely affect the audible bits.
by Nick
Thu Jul 05, 2018 11:03 pm
Forum: Assorted Stuff
Topic: What's your mains voltage ?
Replies: 61
Views: 1033

Re: What's your mains voltage ?

Yes but a 15 second google search will give you all you need.
But it wont. Google will give what it can be, Mark wanted to know what it actually is.
by Nick
Thu Jul 05, 2018 8:46 pm
Forum: Assorted Stuff
Topic: What's your mains voltage ?
Replies: 61
Views: 1033

Re: What's your mains voltage ?

Except that ( it's been an interesting survey ) it's not that variable at any given location, from those that have posted repeat results ( and my own experience ) - just a few volts. Plus nobody seems to have 220V or 230V , only a couple below 240V . Almost all within 240 to 252. Yep, AFAIK, nothin...
by Nick
Thu Jul 05, 2018 5:28 pm
Forum: Everyones Projects
Topic: PCL86 Triode SE Spud Amp
Replies: 21
Views: 540

Re: PCL86 Triode SE Spud Amp

Yep, the thing is, once you reach the point where the random noise is the dominant signal its hard/impossible to see the coherent signals on a scope. The ears can find them and so can a FFT of the signal. Thats where you go beyond what a simple scope can do.
by Nick
Thu Jul 05, 2018 3:52 pm
Forum: Everyones Projects
Topic: PCL86 Triode SE Spud Amp
Replies: 21
Views: 540

Re: PCL86 Triode SE Spud Amp

You can just see it, hiding in the hiss on the scope screen if you look carefully and for long enough.
Or use something that can give you a spectrum of the output. I still have a Pete Millet input box if anyone wants to use it as a sound card front end.
by Nick
Thu Jul 05, 2018 11:04 am
Forum: Assorted Stuff
Topic: What's your mains voltage ?
Replies: 61
Views: 1033

Re: What's your mains voltage ?

At its heart is a completely bog standard online ups. Don't think it is, last time I looked the PS audio units worked by comparing the incoming mains with a ideal reference then adding or subtracting as required from the source mains to achieve the reference on the output. It may only need to provi...
by Nick
Thu Jul 05, 2018 8:37 am
Forum: Assorted Stuff
Topic: What's your mains voltage ?
Replies: 61
Views: 1033

Re: What's your mains voltage ?

At its heart is a completely bog standard online ups. Don't think it is, last time I looked the PS audio units worked by comparing the incoming mains with a ideal reference then adding or subtracting as required from the source mains to achieve the reference on the output. It may only need to provi...
by Nick
Tue Jul 03, 2018 8:36 pm
Forum: Everyones Projects
Topic: Adventures in LCR Phonos
Replies: 16
Views: 224

Re: Adventures in LCR Phonos

Can you explain a bit more what you mean by no path to ground from the input? If you look at he circuit of the tango LCR, there is a resistive path from the input to the ground point. If you put 65v (as that circuit does) with no blocking cap then current will flow. May be ok, may not, can't say. Y...
by Nick
Tue Jul 03, 2018 4:39 pm
Forum: Beginners
Topic: Negative grid current WTF?
Replies: 21
Views: 379

Re: Negative grid current WTF?

Well, if it doesnt follow the valve it must be the socket or parts around it. What are the voltages on the pins without the valve in the socket.

Have you checked that what you are calling 0v may in fact have become 3v wrt the rest of the amp?
by Nick
Tue Jul 03, 2018 4:16 pm
Forum: Beginners
Topic: Negative grid current WTF?
Replies: 21
Views: 379

Re: Negative grid current WTF?

Do you mean the grid is at -3v WRT ground, so the grid end of the 100k is at -3v and the ground end 0?

If so, would that not make the cathode more +ve.