Search found 20148 matches

by Mike H
Mon Feb 19, 2024 1:19 pm
Forum: Assorted Stuff
Topic: General health matters.
Replies: 784
Views: 189966

Re: General health matters.

Went to give a blood sample for PSA test at midday. If there's a problem, they''ll let me know. If not, they won't! :shock: Well that's what she said.
by Mike H
Mon Feb 19, 2024 1:17 pm
Forum: Everyones Projects
Topic: On My Bench.
Replies: 84
Views: 28617

Re: On My Bench.

Google 'tantalum capacitor vs electrolytic'

Quite interesting. Apparently tants can be more prone to failure. ESR and leakage can be good, but may be non-linear over a frequency range.
by Mike H
Sun Feb 18, 2024 11:03 pm
Forum: Everyones Projects
Topic: On My Bench.
Replies: 84
Views: 28617

Re: On My Bench.

Only times I've seen tant's used is for small size. They're not good for audio anyway. So yeah do it.
by Mike H
Fri Feb 16, 2024 4:28 pm
Forum: Everyones Projects
Topic: Fg810 - A Working Title
Replies: 43
Views: 20243

Re: Fg810 - A Working Title

Oven is beeping, gotta go. I'm having a go at making Polish potato pierogies. http://livinginthepast-audioweb.co.uk/imagex/misc/th_throughdoor.gif Report necessary on the outcome please. Shouldn't have used puff pastry - otherwise, not unpleasant! Needs more cheese and seasoning tho. The instructio...
by Mike H
Fri Feb 16, 2024 2:50 pm
Forum: Everyones Projects
Topic: Fg810 - A Working Title
Replies: 43
Views: 20243

Re: Fg810 - A Working Title

:lol: So it's been used continuously for the last 2 days (my stereo is usually on all day every day, unless I'm out, or asleep :D - it's also used for the soundtrack for YouTube and DVD's) Playing the same stuff in a random loop, so is well known by now - I'm hearing things I never heard before. Thi...
by Mike H
Thu Feb 15, 2024 6:42 pm
Forum: Everyones Projects
Topic: More RTZ DAC Fun.
Replies: 18
Views: 2047

Re: More RTZ DAC Fun.

Certainly does, liking that. :thumbleft:
by Mike H
Thu Feb 15, 2024 6:41 pm
Forum: Everyones Projects
Topic: 6550 SE Amplifier
Replies: 110
Views: 9406

Re: 6550 SE Amplifier

I've seen some of those little transformers on eBay and it's been filed away in the back of my brain ... could come in handy sometime ... :D
by Mike H
Thu Feb 15, 2024 6:36 pm
Forum: Assorted Stuff
Topic: General health matters.
Replies: 784
Views: 189966

Re: General health matters.

Yikes. Also hoping it does. :(
by Mike H
Thu Feb 15, 2024 6:33 pm
Forum: Everyones Projects
Topic: C3g Aikido Phono
Replies: 319
Views: 81089

Re: C3g Aikido Phono

Screenshot 2024-02-14 192036.png What's this analysis you did Mike? (The sine wave jobbie.) Where you've got your '.ac oct ...' etc. Right mouse click on it, change it to '.tran 1' (transient, 1 second - or 5 seconds, or even a fraction of a second) From the help file - Perform a transient analysis...
by Mike H
Wed Feb 14, 2024 7:30 pm
Forum: Everyones Projects
Topic: C3g Aikido Phono
Replies: 319
Views: 81089

Re: C3g Aikido Phono

I took the liberty of having a play with it - didn't take long - so this is my tidied up version - yes it has a Voltage of X4 (12 dB).


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Screenshot 2024-02-14 192036.png
Screenshot 2024-02-14 192036.png (38.52 KiB) Viewed 926 times
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TubeCAD Simple Pre-Preamp-3.png
TubeCAD Simple Pre-Preamp-3.png (22.6 KiB) Viewed 926 times
by Mike H
Wed Feb 14, 2024 7:09 pm
Forum: Everyones Projects
Topic: C3g Aikido Phono
Replies: 319
Views: 81089

Re: C3g Aikido Phono

Second problem, you've got '-12V' for V3 (and you don't need the 'V'), but you're already using its negative terminal for the supply rail, so you've inverted it and made it +12V. As it is, just needs '12'. V2: again don't need '+12V', just '12'. The text box value is a Voltage by default, so don't n...
by Mike H
Wed Feb 14, 2024 6:55 pm
Forum: Everyones Projects
Topic: C3g Aikido Phono
Replies: 319
Views: 81089

Re: C3g Aikido Phono

Whoah I've just noticed something, R2 is 1 milliohms! :shock:

That's a virtual short circuit.

I presume you meant 1 Megohms, so you have to write '1meg' or '1Meg' (can't be an 'M' on its own, and no spaces).
by Mike H
Wed Feb 14, 2024 5:16 pm
Forum: Everyones Projects
Topic: Fg810 - A Working Title
Replies: 43
Views: 20243

Re: Fg810 - A Working Title

Yeah it's alright! Sounds very smooth. Bass is all there and not flabby. Treble is clean with good detail, and not 'in yer face' with it (what Phil calls 'transistor ear'). Trivia - Supply Voltage is bang on 45V. Amps' output DC points bang on 21.5V. According to the Fluke, there's 3.5 mV of hum, or...
by Mike H
Wed Feb 14, 2024 4:55 pm
Forum: Everyones Projects
Topic: Fg810 - A Working Title
Replies: 43
Views: 20243

Re: Fg810 - A Working Title

Detail, left amp board and copper screen - transformer is closerer on that side - - Fg810 Wiring -005.jpg - Bottom of case, rubbr feet, and M5 screws into captive nuts to secure chassis - - Fg810 Wiring -006.jpg - Plugged in and making ack-chool noises! http://livinginthepast-audioweb.co.uk/imagex/m...
by Mike H
Wed Feb 14, 2024 4:49 pm
Forum: Everyones Projects
Topic: Fg810 - A Working Title
Replies: 43
Views: 20243

Re: Fg810 - A Working Title

And suddenly it was finished. Last wiring was input screened leads, and quite fiddly. Pix ... - Fg810 Wiring -002.jpg - More lacing cord at the back. Green board on the right is for a 555 timer to flash the front panel LED when speaker relay is off, e.g. start-up delay. - Fg810 Wiring -003.jpg - Int...