Leach amp - Jens Rasmussen version board group buy

4/3/08

Prototype boards to be ordered soon. Tweeter board looks like a no-go unless Jens gets really insprired soon.

Schemati: https://www.diyaudio.com/forums/attachment.php?s=&postid=1437115&stamp=1203842288

Pricing will depend on whether the no tooling special is still going when we order.

Modified 1/30/08 to reflect the output board options Jens has proposed

Modified 2/14/08 with size of boards

Modified 2/28/08 with final size of boards

The options are:

Front End:

Nominally a Super Leach that can be made into a Leach Low TIM with parts omissions and jumpers. Required for both versions.

The front end board is 13 x 11 [cm]

Output boards:

Extended Leach - just like a detached version of the last buy. Positions for 5 NPN and 5 PNP devices

The output board is 17 x 11 [cm]

Super Leach - Jens' version of the super leach output with 4 complimentary pairs of cascoded devices - 8 NPN and 8 PNP, 16 total devices.

The output board is 23,5 x 11 [cm]

Super Leach Tweeter - a single pair of cascoded complimentary devices. Suitable for low power (such as tweeter) applications, so you don't need to have another set of lower voltage rails or waste a large board for a low power application.

Possible Round 2 buy of Jens' latest version, begun December, 2007

Name	Country	Front ends	10 device output	16 device cascode output	4 device cascode output	Paid	Shipped	Received	Notes
_	_	Standard or super	Standard Leach	Super Leach	Super Leach tweeter
BobEllis	US	8	4	2	2	_	_	_	_
jormajj	Finland	4	2	2	_	_	_	_	_
tony	philippines	8	_	8	2	_	_	_	_
JensRasmussen?	Denmark	0	_	_	_	_	_	_	Someone should test this new layout !
Zeljko M	Croatia	6	6	_	_	_	_	_	I need...
Loboone	New Zealand	6	4	2	_	_	_	_	_
TadEllis?	US	8	4	4	_	_	_	_	_
groov	US	4	_	_	_	_	_	_	_
comicrcc	US	2	_	2	_	_	_	_	_
farl	UAE	2	_	_	_	_	_	_	_
yoshi78	Norway	4	_	_	_	_	_	_	_
LanDoctor?	US	4	_	_	_	_	_	_	_
leadfinger	US	7	5	2	_	_	_	_	_
Lesherons	US	10	4	4	_	_	_	_	_
Ed LaFontaine?	US	2	2	_	_	_	_	_	_
Cobra2	NO	4	_	2	2	_	_	_	_
PM650	US	2	2	_	_	_	_	_	_
Westley	US	8	4	4	_	_	_	_	_
finneybear	US	2	_	2	_	_	_	_	_
CeeVee?	PT	4	_	_	_	_	_	_	_
Shaun	ZA	2	2	_	_	_	_	_	_
Ferrari	Netherlands	8	4	4	_	_	_	_	_
patch	US	4	2	2	_	_	_	_	_
pchw	US	4	2	2	_	_	_	_	_
rob3262	US	6	6	_	_	_	_	_	_
rolandong	Philippines	8	_	8	_	_	_	_	_
Guiness	USA	4	2	2	_	_	_	_	_
gmikol	USA	4	2	2	_	_	_	_	_
pool	sweden	4	_	2	_	_	_	_	_
Carl_Huff	USA	8	4	4	_	_	_	_	_
widerström	Sweden	4	2	2	_	_	_	_	_
TedinMass?	USA	4	2	2	_	_	_	_	_
Johan_01	South-Africa	4	2	2	_	_	_	_	_
fredlock	US	5	2	1	2	_	_	_	_
AudioG?	Italy	2	2	_	_	_	_	_	_
argofanatic	Canada	6	4	2	_	_	_	_	_
alexyz	France	2	2	_	_	_	_	_	_
aterren	USA	10	6	2	2	_	_	_	_
kenlaumm	Hong Kong	4	4	_	_	_	_	_	_
zaccaro	Spain	7	_	_	_	_	_	_	If any information is needed zaccaro_86@hotmail.com
rtate	Canada	4	_	4	_	_	_	_	_
Michael_V	Sweden	2	_	2	_	_	_	_	_
Digital Willie	USA	4	2	2	_	_	_	_	_
postalrat	USA	4	2	2	2	_	_	_	_
PlanoDano?	USA	2	_	2	_	_	_	_	_
kpmadden	USA	2	2	_	_	_	_	_	_
clm811	USA	4	4	_	4	_	_	_	_
hallcon83	USA	13	4	6	3	_	_	_	_
_	_	_	_	_	_	_	_	_	_
_	_	_	_	_	_	_	_	_	_
_	_	_	_	_	_	_	_	_	_
_	_	_	_	_	_	_	_	_	_
_	_	_	_	_	_	_	_	_	_
Total	_	226	93	93	15	_	_

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