I never new you had a stroke, that must have been rough. I’m glad you’re feeling better Hugh, take care of yourself mate.
Thanks a lot, just checked and they are available at element 14; $3.70 each. Back order at mouser and digikey.
Bix,
These are easily avail in Oz. In any larger city no issue at all, maybe around $5.
You do not have to get them from the US; I get most of my usual components in Oz and only get the unusual from the US, which has heavy shipping despite their 'free' shipping ads!
I never knew myself until I started to talk and found I had to learn speech again....... After six years (it happened in 2012) my speech is fine until heat weather or I'm very tired. But what never did get better was reading. I can not easily read now, and from time to time I mistake things I've read on this forum. I can write pretty well, but reading is a disaster and I can no longer read books now. But it's OK; I drink a lot of coffee and talk a helluva lot to compensate....... I guess I've lost a few sectors on my HDD, that's what happens if you have a head crash.....
BTW, any 150W nmos with 20A and 200V is all you need. Today I bought 160 NXT (Philips) nmos in TO247, rated at 150V, 300W and 73A!! They cost AUD70c EACH locally. They would be OK to replace the IRFP240, but of course you also need a pmos too, I suggest the FQA36P15.
Hugh
These are easily avail in Oz. In any larger city no issue at all, maybe around $5.
You do not have to get them from the US; I get most of my usual components in Oz and only get the unusual from the US, which has heavy shipping despite their 'free' shipping ads!
I never knew myself until I started to talk and found I had to learn speech again....... After six years (it happened in 2012) my speech is fine until heat weather or I'm very tired. But what never did get better was reading. I can not easily read now, and from time to time I mistake things I've read on this forum. I can write pretty well, but reading is a disaster and I can no longer read books now. But it's OK; I drink a lot of coffee and talk a helluva lot to compensate....... I guess I've lost a few sectors on my HDD, that's what happens if you have a head crash.....
BTW, any 150W nmos with 20A and 200V is all you need. Today I bought 160 NXT (Philips) nmos in TO247, rated at 150V, 300W and 73A!! They cost AUD70c EACH locally. They would be OK to replace the IRFP240, but of course you also need a pmos too, I suggest the FQA36P15.
Hugh
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Looking at Mouser and digikey, IRFP240 is obsolete. What’s the recommendation for this? Is there a substitute or are they available somewhere else?
I got some IRFP250MPBF for my build from E14. I ran it through the sim and it seemed to behave alright there, and IRFP250 is marked on the schematic anyway.
Bix, PM me your address if you are still interested in the pair of Phunk boards.
Cheers
ROHS compliant parts are out of stock and 10000 odd seem to be on order and will be available by 29th Aug.
I am sure there must be some reputed shop within Australia stocking these.
Hugh had informed some (better) replacements somewhere in the thread (from memory), if I find it, will update here.
regards
Prasi
edit:
opps too late, already solutions provided by your fellow countrymen.
I am sure there must be some reputed shop within Australia stocking these.
Hugh had informed some (better) replacements somewhere in the thread (from memory), if I find it, will update here.
regards
Prasi
edit:
opps too late, already solutions provided by your fellow countrymen.
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Rockby is always worth a look. They've all sorts of stuff at reasonable prices.
I've tonight tested the first two completed Phunk (Borg style) boards as far as pre-input testing.
No smoke and both boards bias nicely. The offset was tames from 450mV+ by changing D9 & D10 to the green diode and jumper configuration. DC offset now starts at about 70mV and drops to +/- 18mV (just drifts around).
When I switch off though, I notice a DC spike of 2.4DC at the speaker output. This is tested no input or output loads connected.
Would that be from the inductor? Is that going to be damaging for a speaker?
No smoke and both boards bias nicely. The offset was tames from 450mV+ by changing D9 & D10 to the green diode and jumper configuration. DC offset now starts at about 70mV and drops to +/- 18mV (just drifts around).
When I switch off though, I notice a DC spike of 2.4DC at the speaker output. This is tested no input or output loads connected.
Would that be from the inductor? Is that going to be damaging for a speaker?
Glad to hear that!
This build has been pretty enjoyable (big thanks to all those that put their time and energy into bringing this to the community)!
I'm looking forward to getting through the final stages of testing, assembling and actually listening to the boards
All that's left now is to chuck a sine wave through and see how it behaves and then hook up the workshop speakers for testing.
I'm currently using a dual 36V SMPS setup for testing - hopefully these aren't too noisy!
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