Smaller Leach Amp V1

Status
Not open for further replies.
Jump to Latest
#104
Ed,

I got the impression that most builders wanted the 6 transistor version, so I stopped work on the 4 transistor version.

It is no problem making the 4 version also, but I thought it might be better not to have too many options to chose from, to get the number of boards big enough to get a low price..

The 4 transistor version should be ok with rails of +-50V, but be sure to ensure enough cooling.... the numbers are not verified yet, but it's going to be arround that depending on load.

\Jens
 
#105
Full speed ahead

Jens, you are doing fine. I continue to be heartened by your generosity...providing free design services to the masses AND balancing their various desires. It's quite a task, actually. I watch you efforts with the greatest respect.
My question about the 4 device board was aimed in another direction, and your answer tells it all: +/- 50 V is more than the original Leach Amp had.
 
#108
"+/- 50 V is more than the original Leach Amp had."

The original Leach as published in Feb. '76 and '77 issues of Audio magazine ran on ±50V from a 68VCT 8A transformer. The outputs were 2N6328/31 or MJ802/4502 (only one pair) for a 6 ohm~8 ohm load, going to two pair for low impedance loads.

Double sided boards for two pair of outputs were offered for $16 a pair plus $1 for postage and handling!!!
 
#112
I am content with the prices Jens mentioned in post 40.
The Leach boards i already have i still consider a bargain.
Thats not counting the many hours i did not have to invest in the layout ( which i am not able to make like that anyway).

(Thank goodness my network is running again tomorrow morning.)
 
#114
Hey guys.
You can count me with 4pcs at least. (see the wiki).
I am content with the prices Jens mentioned in post 40.
The Leach boards i already have i still consider a bargain.
Thats not counting the many hours i did not have to invest in the layout ( which i am not able to make like that anyway).
Click to expand...
Hello big J. It's a very good price i say. I first wanted to make the boards myself (manually - go figure) but no paintjob and stuff ... well these boards are better. And they would deffinitely make me feel better. Just Imagine :
POWERED BY J.R.d.b. or even
J.R.d.b. INSIDE

C.U.
 
#119
Status
Not open for further replies.
Top Bottom