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GB for Leach Low-TIM with 8 + 8 BJT outputs (bare PCB)
GB for Leach Low-TIM with 8 + 8 BJT outputs (bare PCB)
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Old 30th September 2014, 04:03 PM   #51
linuxguru is offline linuxguru  India
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IIRC, those jumpers have been incorporated as tracks into the layout, and there's now a single 0 ohm resistor/jumper at R100 instead. There's also R14, a 10-ohm lift resistor for the lifted input-ground.
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Old 1st October 2014, 03:18 PM   #52
scalpel is offline scalpel  United Kingdom
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Ha got it. Thanks for the help
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Old 5th January 2015, 06:02 AM   #53
Roushon is offline Roushon  India
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Location: Mumbai (Bombay)
Quote:
Originally Posted by linuxguru View Post
Folks, as the title says: This is a preliminary GB for a Leach Low-TIM clone based on Jens Rasmussen's last published schematic, with 2 additional output pairs for better SOAR management (and a few other minor modifications). Almost all the parts designations have been retained the same as the Jens Rasmussen BOM. With 8 + 8 2STC5200/A1943 outputs and +/- 75V rails, this should comfortably manage about 300W into 8 ohms. Higher rails are possible with appropriate transistor substitutions. Each of these boards is a monoblock of dimensions 265mm x 95mm (see attached picture).

At the moment, I have 16 boards available, but depending on the interest, I can order additional boards (for further rounds of the GB) with about 2 weeks lead time.

The bare boards are priced at USD 18 each, and I can ship up to 4 boards to most locations in the US/EU/Australasia for a flat rate of USD 8.

If interested, please add the quantity required to the thread, and PM me your email address. PM or email me (siva dot chander at gmail dot com) for questions, clarifications, details, etc.
Hi!
May be I am too late as this is a very old thread.
Nevertheless giving a try. I have Kings open baffle
speakers which I am playing with LM3886 based amp so
far. Would like to try some non-chip amplifier, 200W per
ch. Searching the forum takes me to Leach amp and then
to this page. I know nothing about this amp. Will it be a
suitable project for my requirement based on this Leach
amp? If yes, kindly tell me whether you still have a couple
of boards left with you.

Regards
Roushon.
__________________
S. Roushon
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Old 5th January 2015, 10:32 AM   #54
linuxguru is offline linuxguru  India
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Quote:
Originally Posted by Roushon View Post
Hi!
May be I am too late as this is a very old thread.
Nevertheless giving a try. I have Kings open baffle
speakers which I am playing with LM3886 based amp so
far. Would like to try some non-chip amplifier, 200W per
ch. Searching the forum takes me to Leach amp and then
to this page. I know nothing about this amp. Will it be a
suitable project for my requirement based on this Leach
amp? If yes, kindly tell me whether you still have a couple
of boards left with you.
Hi Roushon - yes, I have some boards still available. They can be populated with 4 pairs of outputs (4 NPN + 4 PNP) to reach 200W into 8 ohms with (say) +/- 60V rails. PM me or email me at siva dot chander at gmail dot com for details.
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Old 19th January 2015, 11:13 PM   #55
deafbykhorns is offline deafbykhorns  United States
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Location: florida
PM sent
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Old 16th June 2018, 08:19 AM   #56
craydive is offline craydive
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Join Date: Apr 2011
Location: The Land Downunder....
Hi Linuxguru, tried to PM you but your messagebox is full and wont accept anymore messages
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