You can get around these "boot up" problems with resistors across slow start relays, NTCs, triacs etc but then you are increasing the primary input resistance causing a less well regulated output down the line. I for one will be trying a 2012 power supply - its a hobby if it all goes pear shaped its not the end of the world... may be I should order a couple of extra lateral Mosfets after all..
Hi Guys,
I can't say enough how much I appreciate all the patience and understanding. I've been feeling sick about this all week, and I'm releived that everyone is so easy going!
I'll keep everyone updated, and let's all hope Semelab can come through for us and get us some parts in February.
johnwallis:
Thanks for giving it a shot! I was wondering about the Class D place since they don't respond to email and I wasn't very keen on the overseas call, so they were a bit of an unknown for me. I suppose they're probably now defunct, so at least that answers that question. It's good to have a second confirmation that nobody seems to be holding stock.
mwmkravchenko
Let me know how many amps you need for the show, and I'll bring along what I've got here. I have a precious 8 output devices so I could bring four functional amps to the show. Will that be enough? I also have four of the LPUHP amps which should work for the top end.
pieter t:
oops! Copy paste error.
Here's the correct list:
P-Channel
“Pro Audio” ACD103PDD
“Semelab” ALF16P20W
“Exicon” ECW20P20Z
“Magnatec” BUZ906DP
“Magnatec” BUZ907DP – higher voltage
“Magnatec” BUZ908DP – higher voltage
N-Channel
“Pro Audio” ACD101NDD
“Semelab” ALF16N20W
“Exicon” ECW20N20Z
“Magnatec” BUZ901DP
“Magnatec” BUZ902DP – higher voltage
“Magnatec” BUZ903DP – higher voltage
As a reminder, I'm honestly fine is anyone opts for option 1, 2, or 3, so don't feel trapped into 2 for my sake. It was mostly 4 that I was trying to avoid
.
Thanks again guys!
Owen
I can't say enough how much I appreciate all the patience and understanding. I've been feeling sick about this all week, and I'm releived that everyone is so easy going!
I'll keep everyone updated, and let's all hope Semelab can come through for us and get us some parts in February.
johnwallis:
Thanks for giving it a shot! I was wondering about the Class D place since they don't respond to email and I wasn't very keen on the overseas call, so they were a bit of an unknown for me. I suppose they're probably now defunct, so at least that answers that question. It's good to have a second confirmation that nobody seems to be holding stock.
mwmkravchenko
Let me know how many amps you need for the show, and I'll bring along what I've got here. I have a precious 8 output devices so I could bring four functional amps to the show. Will that be enough? I also have four of the LPUHP amps which should work for the top end.
pieter t:
oops! Copy paste error.
Here's the correct list:
P-Channel
“Pro Audio” ACD103PDD
“Semelab” ALF16P20W
“Exicon” ECW20P20Z
“Magnatec” BUZ906DP
“Magnatec” BUZ907DP – higher voltage
“Magnatec” BUZ908DP – higher voltage
N-Channel
“Pro Audio” ACD101NDD
“Semelab” ALF16N20W
“Exicon” ECW20N20Z
“Magnatec” BUZ901DP
“Magnatec” BUZ902DP – higher voltage
“Magnatec” BUZ903DP – higher voltage
As a reminder, I'm honestly fine is anyone opts for option 1, 2, or 3, so don't feel trapped into 2 for my sake. It was mostly 4 that I was trying to avoid
.Thanks again guys!
Owen
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npdot:
We're hanging in there! Luckily I have an infinitely understanding and supportive wife. Anyone who has received a package already will no doubt have admired the perfect handwriting on the envelope, and I can assure you it's not mine! If I wrote them out by hand, I would fear none of the shipments would ever make it. (Does that say "Czech Republic" or "China Republic"?)
I asked her if she would be up for labelling another 40 envelopes and she informed me that as long as I keep her supplied with wine and episodes of 30 Rock, she'd be game.
Thanks again for being so understanding!
Cheers,
Owen
We're hanging in there! Luckily I have an infinitely understanding and supportive wife. Anyone who has received a package already will no doubt have admired the perfect handwriting on the envelope, and I can assure you it's not mine! If I wrote them out by hand, I would fear none of the shipments would ever make it. (Does that say "Czech Republic" or "China Republic"?)
I asked her if she would be up for labelling another 40 envelopes and she informed me that as long as I keep her supplied with wine and episodes of 30 Rock, she'd be game.
Thanks again for being so understanding!
Cheers,
Owen
The 2SK1058/2SJ162 certainly would work, but you'd need at least 2 of each of them to get equivalent power dissipation and current. DK has them listed at $10 each so with three of them it would effectively triple the cost for only a slight increase is dissipation and current capability.
Just the same, if someone wants to drop the mosfets from thier order and try these, they would most likely work just fine.
Cheers,
Owen
Just the same, if someone wants to drop the mosfets from thier order and try these, they would most likely work just fine.
Cheers,
Owen
Owen,
I strongly prefer option 1 as my order is one of those that includes your headphone amp and viewing that thread has me eager to begin building and listening - definitely no to refunds or MOSFET sourcing.
Just let me know how you decide to handle things and I'll Paypal any extra expense over to you.
Thanks,
Walter
I strongly prefer option 1 as my order is one of those that includes your headphone amp and viewing that thread has me eager to begin building and listening - definitely no to refunds or MOSFET sourcing.
Just let me know how you decide to handle things and I'll Paypal any extra expense over to you.
Thanks,
Walter
I have just spoken to Farnell in the UK they have no SEMELAB - ALF16P20W in stock but think 65 will be with them the second week of Feb. They do however have 29 SEMELAB - ALF16N20W in stock at the moment may be a single ended class A? I have ordered 2 sets from them just in case oh and a CO2 fire extinguisher refill.
Option #1 or #2 is good for me.
Would be nice to have the boards when working with the chassis so i can confirm that everything will fit so its just plug and play when the real transistors arrive in march. Just need to buy 2 random transistors in the same package to be able to test everything mechanically.
Still it is no panic since i won't get any sound until the transistors arrive either way and i would like to see something more about the SMPS from Cristi. So i will follow the stream.
Is the layout images posted previously to scale? In that case i could just print one of those for reference and hold the entire shipment until the transistors arrive.
Cardboard + inc or FR4 + copper doesn't really matter this time
Would be nice to have the boards when working with the chassis so i can confirm that everything will fit so its just plug and play when the real transistors arrive in march. Just need to buy 2 random transistors in the same package to be able to test everything mechanically.
Still it is no panic since i won't get any sound until the transistors arrive either way and i would like to see something more about the SMPS from Cristi. So i will follow the stream.
Is the layout images posted previously to scale? In that case i could just print one of those for reference and hold the entire shipment until the transistors arrive.
Cardboard + inc or FR4 + copper doesn't really matter this time
agreed, if youde have me i'd be there in a flash.
1 or 2 for me, edit: my preference discussed via email.
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I would say 150W into 8 ohms would be highest I would go with a single pair. 125W might be a little nicer on the devices.
For those who want their parts shipped now, just post up here as the others have done and I'll get them out early next week. We'll work out shipping for the mosfets when they arrive later.
I'll update the list with another column to represent people's preferences.
Cheers,
Owen
