Leach Amp pcb group buy interest - Page 2

JensRasmussen · 12:22 PM

Hi Ed,
Sounds like a good idea, and now it is possible since the output terminals are located in the middle of the board.

My family is going through a rough patch right now, my workplace is going to close in about ½ year, and after that I will be looking for new work..... It sucks, we have a great team but we are "too expensive" compared the Chinese (no offence) Not sure how that conclusion has been made, but I suspect that it is more an effort to please the share holders than based on actual experience. Where I'm located, outsourcing is a big buzz word, and outsourcing is a sure success (if you ask management)

Oh well….. I guess this is just a matter of time, before the Chinese industry will be comparable to European when it comes to pricing pr. hour…. maybe then all R/D will move somewhere else?

x\\\Jens

tryonziess · 28th November 2009, 02:54 PM

Jens,
It would be nice if you could market your designs on the web. These are proven practical amplifiers with years of hard use as proof.
It would just need the good Doctors o.k.

Tad

GTHusker · 29th November 2009, 01:58 PM

I would be interested in 2 boards.

Cal Weldon · 29th November 2009, 03:12 PM

Moved to group buys.

egelundvej25 · 30th November 2009, 06:35 AM

I am ready for 3 boards

- Michael

peranders · 30th November 2009, 06:42 AM

It seems that there is a market for a group buy. Maybe someone should put up a wiki page? I can do that if you want.

Loboone · 30th November 2009, 08:24 AM

Put me down for three please.

I need something to put the other "19" MJL4302's and MJL4281's left over from my "Leach 6". That is if I don't blow them up when I finally fire her up soon!!! Man it has been a long build.

Can I assume that the other group buy / redesign etc we were talking about died a natural death and this is starting from fresh?

Jfet front end sounds interesting!

Ian

P.S. Sorry to hear about the job thing Jens. As my wise old aunty say's "it will all work out right in the end." And she sould know. We recon if she fell down the toilet she would come out with a box of chocolates!!!

tryonziess · 30th November 2009, 10:39 AM

Peranders,
If you put up the wiki page I will be glad to run the group buy if it gets to a decent number of boards.
I really like that 12 output snap off board idea. Could easily run 85 volt rails for a nice 300 plus amp. I sense a Christmas time group buy. I am in for 4 boards myself.

Tad

AndrewT · 30th November 2009, 11:03 AM

I like the new layout with the main ground and speaker out in the middle. Much closer to the +ve & -ve feeds.
I see you have kept the three 0.1inch pitch inputs. A great idea that covers many options without wasting PCB space. I do wish others would copy this.

jFET input stage !!
Could space be found for a full two transistor cascode? Rather than the single transistor that Leach did?

400 · 30th November 2009, 12:18 PM

Hi,

I think, I am in with 2 or 3 pcbs. Especially, if it will be a high power version (12 transistor version).
Reagrds,
Marcel

28th November 2009, 12:19 PM	#11
JensRasmussen diyAudio Member Join Date: Jul 2002 Location: Denmark - Jutland	Hi Ed, Sounds like a good idea, and now it is possible since the output terminals are located in the middle of the board. My family is going through a rough patch right now, my workplace is going to close in about ½ year, and after that I will be looking for new work..... It sucks, we have a great team but we are "too expensive" compared the Chinese (no offence) Not sure how that conclusion has been made, but I suspect that it is more an effort to please the share holders than based on actual experience. Where I'm located, outsourcing is a big buzz word, and outsourcing is a sure success (if you ask management) Oh well….. I guess this is just a matter of time, before the Chinese industry will be comparable to European when it comes to pricing pr. hour…. maybe then all R/D will move somewhere else? x\\\Jens Last edited by JensRasmussen; 28th November 2009 at 12:22 PM.

29th November 2009, 03:12 PM	#14
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Moved to group buys. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

30th November 2009, 06:42 AM	#16
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	It seems that there is a market for a group buy. Maybe someone should put up a wiki page? I can do that if you want. __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

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28th November 2009, 02:54 PM	#12
tryonziess diyAudio Member Join Date: Apr 2007	Jens, It would be nice if you could market your designs on the web. These are proven practical amplifiers with years of hard use as proof. It would just need the good Doctors o.k. Tad

29th November 2009, 01:58 PM	#13
GTHusker diyAudio Member Join Date: Nov 2009 Location: Cold Spring, KY	I would be interested in 2 boards.

30th November 2009, 06:35 AM	#15
egelundvej25 diyAudio Member Join Date: Jan 2008 Location: Esbjerg, Denmark	I am ready for 3 boards - Michael

30th November 2009, 08:24 AM	#17
Loboone diyAudio Member Join Date: May 2005 Location: Hamilton Waikato NZ	Put me down for three please. I need something to put the other "19" MJL4302's and MJL4281's left over from my "Leach 6". That is if I don't blow them up when I finally fire her up soon!!! Man it has been a long build. Can I assume that the other group buy / redesign etc we were talking about died a natural death and this is starting from fresh? Jfet front end sounds interesting! Ian P.S. Sorry to hear about the job thing Jens. As my wise old aunty say's "it will all work out right in the end." And she sould know. We recon if she fell down the toilet she would come out with a box of chocolates!!!

30th November 2009, 10:39 AM	#18
tryonziess diyAudio Member Join Date: Apr 2007	Peranders, If you put up the wiki page I will be glad to run the group buy if it gets to a decent number of boards. I really like that 12 output snap off board idea. Could easily run 85 volt rails for a nice 300 plus amp. I sense a Christmas time group buy. I am in for 4 boards myself. Tad

30th November 2009, 11:03 AM	#19
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	I like the new layout with the main ground and speaker out in the middle. Much closer to the +ve & -ve feeds. I see you have kept the three 0.1inch pitch inputs. A great idea that covers many options without wasting PCB space. I do wish others would copy this. jFET input stage !! Could space be found for a full two transistor cascode? Rather than the single transistor that Leach did?

30th November 2009, 12:18 PM	#20
400 diyAudio Member Join Date: Jan 2008	Hi, I think, I am in with 2 or 3 pcbs. Especially, if it will be a high power version (12 transistor version). Reagrds, Marcel

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