audio-talk

An excellent day, my thanks to Steve! It was great to catch up with everyone again.

Ali Tait wrote: ↑Mon Jun 19, 2023 5:13 pm M

Andrew wrote: ↑Mon Jun 19, 2023 3:45 pm

Michael L wrote: ↑Sun Jun 18, 2023 8:02 pm Great venue and lots of nice folk inc that Mr Gorham, Colin and another fella I'm trying to recall the name of - Andrew?

Could have been me, could have been Ali, I am told we're the spitting image of each other

Except I’m the handsome one.

Had a good day, but loads of really underwhelming sounds. Unfair to judge on bass, but mid range should be doable in most rooms. A few stood out link Nick and Colin’s setup, Cyrus and a couple of others. The worst was this one IMG_5317.jpeg Schuko plug pins are bigger than the pins on a 13A plug an...

I went on the Saturday and enjoyed it apart from a few rooms were playing too load for what the room could take and also I missed a good many rooms as they were full to the brim with bodies. The little PMC speakers caught my attention - seemed to be very full bodied and enjoyable in such a tiny pac...

Michael L wrote: ↑Sun Jun 18, 2023 8:02 pm Great venue and lots of nice folk inc that Mr Gorham, Colin and another fella I'm trying to recall the name of - Andrew?

Could have been me, could have been Ali, I am told we're the spitting image of each other

Ali Tait wrote: ↑Sun Jun 18, 2023 9:44 pm He manfully plowed through to the bitter end.

I don't think any one of us witnessed the true bitter *end* of that monster, I for one am glad I didn't.

pre65 wrote: ↑Mon Apr 10, 2023 3:13 pm I'd love to go to the show, never been to one before, but sadly I can't. I'm supposed to be in Majorca enjoying myself.

simon wrote: ↑Tue Mar 21, 2023 7:43 pm I seem to recall seeing something similar with the iron when I was round at yours a very long time ago now you mention it. Phonos really are a step beyond the average amplifier.

indeed 60db of gain is not to be trifled with.

IslandPink wrote: ↑Wed Mar 15, 2023 6:51 pm Best keep that posting to ourselves, for the sake of your company stock value, Andrew !

Shh, don't tell anyone

Nick wrote: ↑Wed Mar 15, 2023 6:39 pm Earthing is often a case of try everything and keep what works.

+1

Question for Andrew - how much scope is there for increasing the distance of the heater modules from the audio circuit? Could they go in a separate PS box with umbilical wires to the audio box? This might be preferable to passing AC through wires between boxes? Or would this not matter if the umbil...

Is that a choke in the center?

If yes, try moving it, or, at least rotating it, the gap on any choke will emanate a nasty hum field.

Nice work, Simon.

PCB are highly rigid and inelastic, I used to write off the price of the first iteration when doing the heater boards as there was invariably room for improvement.

Andrew

If you drive it with matching Z you can terminate with a high Z, I think that approach is viable at 1k5, but 600R certainly makes things harder. To do this you need chokes that are happy at anode DC. A matching termination and those aforementioned huge caps avoid such issues and the sound quality o...

In the days when we all started out, I bought 25, or so, D3A for a bargain price from a chap in Oz, it was a group buy, they are were a really good deal, sadly at least 20% of them were dead on arrival, white as a sheet inside :( We split the bad ones amongst the group buy, any survivors are probabl...