Search found 4741 matches

by Ray P
Tue Jun 22, 2021 7:05 pm
Forum: Everyones Projects
Topic: The Newton 300B
Replies: 190
Views: 18608

Re: The Newton 300B

Hi Ray - well according to the Spice model (reality may vary) the input voltage will be 432V, required output 407V, so a 25V drop, with the current being circa 20.5mA. I make that about half a watt dissipated through the regular and it should give me a fairly textbook operating point for the 12SN7'...
by Ray P
Tue Jun 22, 2021 7:42 am
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 4754
Views: 937205

Re: What Are You Listening To Right This Minute?

I had forgotton what a fine musician this chap is - I've just ordered his 'Troubadour' album.

by Ray P
Mon Jun 21, 2021 7:31 pm
Forum: Everyones Projects
Topic: The Newton 300B
Replies: 190
Views: 18608

Re: The Newton 300B

I found them so have C1, C2 and C4 (and R4) covered for you if you go the Neurochrome Maida route Dave.
by Ray P
Mon Jun 21, 2021 6:50 pm
Forum: Everyones Projects
Topic: The Newton 300B
Replies: 190
Views: 18608

Re: The Newton 300B

I'm not even sure you'll need the heatsink Dave as you're not asking the regulator to deliver much current I guess? If you tell me your required output voltage and current I'll plug the numbers into the spreadsheet if you want - will give you heatsinking requirments. Somwhere here I have a new set o...
by Ray P
Mon Jun 21, 2021 1:44 pm
Forum: Everyones Projects
Topic: The Newton 300B
Replies: 190
Views: 18608

Re: The Newton 300B

The ones I use are larger than the Maida ones Dave

https://www.diyaudio.com/forums/swap-me ... hingy.html
by Ray P
Mon Jun 21, 2021 12:50 pm
Forum: Everyones Projects
Topic: The Newton 300B
Replies: 190
Views: 18608

Re: The Newton 300B

I've just looked up the Maida regulator (I presume we're talking about this one? ). The use case is perfect, I need to drop about 25 volts at 20.5mA, so I expect heatsinking to the chassis will be enough. Yes, that's the one, however, the design was originally published on DIY Audio, so public doma...
by Ray P
Sun Jun 20, 2021 9:17 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Cycling thread.
Replies: 3057
Views: 591078

Re: The Audio-Talk Cycling thread.

Wet weather again today so garage ride again - I set myself the challenge of riding the Alpe d'Huez climb again so that's twice on consecutive days. I was about 2mins slower today as I took it steady and didn't put in the same effort over the last mile as I did yesterday. Feeling good that I did it ...
by Ray P
Sun Jun 20, 2021 7:21 pm
Forum: Everyones Projects
Topic: The Newton 300B
Replies: 190
Views: 18608

Re: The Newton 300B

...anything that reduces power supply ripple has to be good, right? How about a regulated supply, like the Maida, Dave? I use one for the B+ supply (12au7 and 300B) in my Transcendent Masterpiece clone HPA (along with a set of Andrews filament supplies) and it is silent - sounds bloody marvellous t...
by Ray P
Sun Jun 20, 2021 6:36 am
Forum: Everyones Projects
Topic: 45 SE
Replies: 161
Views: 6333

Re: 45 SE

It'll be nice to hear where Steve has arrived - one day!
by Ray P
Sat Jun 19, 2021 9:31 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Cycling thread.
Replies: 3057
Views: 591078

Re: The Audio-Talk Cycling thread.

An orthopedic surgeon friend describes his job as "carpentry"... Apparently you can have the OP with just local anaesthetic. No. Give me the happy pills and lots of them... Have they talked about possible 'after-affects'? When they do this sort of surgery'debris' can apparently affects th...
by Ray P
Sat Jun 19, 2021 9:23 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Cycling thread.
Replies: 3057
Views: 591078

Re: The Audio-Talk Cycling thread.

I don't recognise all those lakes, by Alpe d'Huez ? It's the nature of Zwift's virtual world Mark, it's an accurate rendering of the Alpe d'Huez climb with respect to the route, gradients, etc. but geographically the coordinates are somewhere in the Pacific so Strava renders your route on a the map...
by Ray P
Sat Jun 19, 2021 8:14 pm
Forum: Everyones Projects
Topic: 45 SE
Replies: 161
Views: 6333

Re: 45 SE

Well it supprises me. Though I guess if it wasn't true then what follows would all just be an excuse for some marketing. The previous examples of bikes and motorcycle imho are false equivalents. IMO, at least for his cycling example he's talking bollocks anyway, reinforced by the the picture of his...
by Ray P
Sat Jun 19, 2021 7:40 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Cycling thread.
Replies: 3057
Views: 591078

Re: The Audio-Talk Cycling thread.

jack wrote: Sat Jun 19, 2021 7:38 pm This year's going to be a write-off - the rehab after major surgery (it counts as major as it takes 2-3 hours and has significant risks) is 9 months...
Better late than never!
by Ray P
Sat Jun 19, 2021 7:32 pm
Forum: Assorted Stuff
Topic: The Audio-Talk Cycling thread.
Replies: 3057
Views: 591078

Re: The Audio-Talk Cycling thread.

I hope it works out with the knee op and you can resume your exercising Nick.

After a couple of weeks of real soreness the problem with my knee just cleared up and I've had no problems since. I feel a bit ambivalent about jogging again though.