audio-talk

Cheers Nick,
I’ll look into that, when I get going on the installation of the caps.

Cheers Nick, that would be great.

Fair enough. I would have thought the different conditions on the two sides of the LTP would lead to a DC offset on the output. I know this thread is ancient history but I tried a 3u3 cap on the inputs of my amp boards last week. It led to a -100mV DC offset on the output. The speaker cones could b...

I’ve had an issue with this build for a while now, where the sound disappears from the left channel. One culprit was a duff cable where the centre conductor had snapped inside the phono plug. I thought I had cured the problem (well you would wouldn’t you.) Then the bloody thing reared its head again...

…Yes and I once foolishly tried making them on plain matrix board – can't remember why now, most likely just being a skinflint – didn't work, the seemingly 'overly ornate' copper layout of the kit board is what keeps them RF stable. Despite all attempts to fix, mine stubbornly remained as RF signal...

Hello, Looking at Post#364 and #365, I see you now have a RC after the main cap bank. If I read the TNTAudio article correctly (https://www.tnt-audio.com/clinica/ssps3_e.html) these are best implemented near to the board since it is supposed to take away any remaining inductance on the power rail. ...

Tina Turner has passed away, aged 83.

https://www.bbc.co.uk/news/65669653

Yikes!

Really pleased with this now. Lovely relaxed, detailed and dynamic presentation. It's certainly worth making the trip to Owston with it.

Revised power supply voltages:

Look fwd to seeing/hearing some of this stuff. Things have certainly changed over the years at Owston. Scary, humming, 1000V breadboards seem to have gone the way of the Dodo.

New 300VA, 25-0-25V toroid at bottom right: IMG_0201.jpeg Whilst I was at it, I removed the crap quality shielded input cables going to the selector and replaced them with simple straight wires. I find loads of these blue/yellow twisted pairs lying around next to BT street cabinets when I’m out walk...

Anyway, what has been bugging me for a while with this amp is that the output stage has a higher voltage transformer than the input/driver stage, which I’ve realised is a bit pointless as this isn’t a valve amp. The output stage (current amp) can only produce as much current as the swing of the driv...

“Hot dog, jumpin’ frog, Albuquerque!” I say.

Or as my daughter, 5 at the time used to sing,

“ Hot dog, jumpin’ frog, have a cookie.”

Great band. Andromeda Heights is also a great album, especially as it has my fave PF song “Electric Guitars” on it.

…Now I have to maintain what they call "posture" for a week - lying face down for at least 45 minutes of every hour, day and night. 7 days of that then 7 days of doing absolutely nothing. Post op check this Monday at St Thomas's then another visit in 2 weeks, hopefully for sign-off... Bes...