audio-talk

...9...10 A piece of half-round beading glued to that gouge, now. Thanks Ray. I'm glad it sounds as though the recovery as relatively simple - I thought it had started to go wrong with the edge nearest the router base as it doesn't look smooth? Good stuff though an at least your problem was a beari...

IslandPink wrote: ↑Fri Sep 13, 2019 10:55 pm Just waiting to offer my card details -

It'll take a bit of a hit - $150!

Ant wrote: ↑Fri Sep 13, 2019 9:09 pm Better day today

Count to 10 Mark; it's recoverable, just a lot of extra work - I know how you feel though.

Ray

I'm glad it worked out with the sale of the horns.

I'm sure we'll look forward to hearing about your new developments.

Found this little chap having a turn in the garden this afternoon;



Apparently its an Elephant Hawk Moth caterpillar. Bit of a bruiser for a caterpillar as you can see by the 10p piece I put next to him.

I've been keeping the cranks turning this week; 119miles covered and 6,400ft climbed.

It was a bit chilly first thing this morning, gonna have to start wearing extra layers and dig out the fingered gloves soon.

Not cars this time and a pretty crap ad at that, but a slice from a great track...



You have to listen to the whole track to experience the genius that was early Roxy Music;

Wolfgang wrote: ↑Tue Sep 03, 2019 7:15 pm Not bad. I am satisfied with the result.

That took a brave man!

That's how I am listening since I have built this amp. And I had one faulty tube so far. The sound it made shocked the hell out of me. :mrgreen: What was the DC offset that resulted from the tube failure you experience? The XRK/Neurochrome solutions would obviously catch any upward drift of DC offs...

Of course, there is an alternative, non-technical approach that might be woth considering, that of basic risk management. If one lists different scenarios and assess their probability (of occurring) against their impact (what would happen should they occur) you can reach sound conclusions about miti...

The InvOTL needs protection from +/- 40V and -250V. The trigger level for the latter needs to be as low as possible (without being triggered by the DC offset!) in order to give enough time for the SSRs to cut it off before it can reach high enough levels at the output that could do damage to the sp...

I don't know what's more important or sounds "better". Originally I wanted to use the Salas BIB (got 2 PCBs) but their max input voltage is 40V and the 30V toroids have 43V after rectification. If you use tailor made transformers it should work. But you will need big heat sinks for this !...

I am still struggling a bit with finding the best solution for protecting the speakers from tube discharging or other faults caused by DC. I studied at least 10 different circuits (among them the solutions from Neurochrome and XRK which are really the best compared to the rest) but nothing really s...

Wolfgang, a question about your output stage power supplies. You currently use the SLB modules; these give you a very clean supply but are not regulators so I assume that you keep them stable, with respect to the output voltage, because you use a mains conditioner so your amp always has the same sup...