audio-talk

How long has the NEC been charging for parking ?

Last time I went parking was free (2-3 years ago) but tomorrow, for the Classic car show, it's £16 (£12 in advance) .

A long time. Getting out of touch, old timer, G-Popz.

I must be getting old too ! Must be 10 years since I was last there.

I went to the motorhome show a few weeks ago and it was free parking?

Maybe they thought there wouldn't be as many of you?

A good day out was had, highlight of the day was seeing two Gordon Keebles.

As to the parking, it WAS £16 to get out of the car park.

Had to look up Gordon Keeble. Good lord! Sorry never heard of 'im

British craftsmanship with American muscle.

https://en.wikipedia.org/wiki/Gordon-Keeble

Fairy nuff!

A question for the knowledgeable

I'm having a senior moment, does the quiescent current (i.e. what you've set it at) of a power MOSFET decrease when it heats up?

I.e., opposite behaviour of a bipolar ...

No. Laterals tend to be stable with temp, but most other sorts of mosfet need temperature compensating if you want a constant current.

all mosfet and latfet datasheet will show the temp coeff graph. As Nick says latfets don't suffer variation like hexfets.

This is why it's wise to let mosfet amps settle for a good while before setting bias and offset if PP. This is particularly important if running high current bias with heatsinks.

to answer your question I believe current can vary up or down depending on temp and/or device....I think check the graph if you need to be precise.

So what Nick said, "no".

OK ta chasps ...

Winter has started here -

IslandPink wrote: ↑Sat Nov 09, 2019 4:56 pm Winter has started here -

Not been out on the bike then!

We didn't see any of the heavy snow the Met Office forecast mentioned for us - still bloomin' cold though!