Leach in a gutted Hafler?

PrestonTom · 23rd May 2007, 04:21 PM

I believe someone has done this before but no details were given.

If a build the Leach (ver4.5 not the "super") can use the following from my Hafler dh200

1. Chassis (looks like there is plenty of room)
2. Transformer (the Leach specs a 56-59 volt) and I don't know about the other specs
3. Heat sinks (the Leach specs recommend something that looks like more surface area). I assume I can re-drill holes to fit the new transistors (if necessary).

I will be prudent and not try to re-use the big caps.

There had been talk of a Nelson Pass designed Class A to put in the Hafler chassis, but it looks like that project got sidelined.

My ultimate use is for amplifying some very efficient corner horns. So power and high current are not critical but a very clean sound with a tight bass are the priorities.

Your advice is appreciated,
-Tom

jaycee · 23rd May 2007, 10:49 PM

I've seen at least one Leach built as a Hafler look alike. I don't see why not

djk · 23rd May 2007, 10:55 PM

Brian GT built a Leach in a Hafler chassis.

The transformer voltage is fine, and the sink is already drilled for TO-3 outputs.

rickl · 1st June 2007, 08:38 PM

I've thought about doing this to my broken Marantz 250. Love those blue meters

.

23rd May 2007, 04:21 PM	#1
PrestonTom diyAudio Member Join Date: Apr 2006 Location: connecticut	Leach in a gutted Hafler? I believe someone has done this before but no details were given. If a build the Leach (ver4.5 not the "super") can use the following from my Hafler dh200 1. Chassis (looks like there is plenty of room) 2. Transformer (the Leach specs a 56-59 volt) and I don't know about the other specs 3. Heat sinks (the Leach specs recommend something that looks like more surface area). I assume I can re-drill holes to fit the new transistors (if necessary). I will be prudent and not try to re-use the big caps. There had been talk of a Nelson Pass designed Class A to put in the Hafler chassis, but it looks like that project got sidelined. My ultimate use is for amplifying some very efficient corner horns. So power and high current are not critical but a very clean sound with a tight bass are the priorities. Your advice is appreciated, -Tom

23rd May 2007, 10:55 PM	#3
djk diyAudio Member Join Date: Feb 2001 Location: USA	Brian GT built a Leach in a Hafler chassis. The transformer voltage is fine, and the sink is already drilled for TO-3 outputs. __________________ Candidates for the Darwin Award should not read this author.

1st June 2007, 08:38 PM	#4
rickl diyAudio Member Join Date: Jun 2004 Location: Minneapolis	I've thought about doing this to my broken Marantz 250. Love those blue meters . __________________ searching for jazz and a little libations.

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23rd May 2007, 10:49 PM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	I've seen at least one Leach built as a Hafler look alike. I don't see why not

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