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Old 19th September 2006, 02:30 AM   #1
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Default PCB's for Leach Amplifier 6 Transistor

I have just had delivered 35 PCB's for the delta audio Leach 6 Clone - double sided, 3 oz copper.

Check them out!
Nice professional boards, pre drilled, & tinned.

I have 20 to sell, $30 USD each + shipping.

paypal or enquiries to empire@ihug.co.nz

As soon as you pay, and provide an address, I will ship!
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Old 19th September 2006, 10:33 AM   #2
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Hi,

Where is the solder resist??

No solder resist and 30$ sounds a bit expensive.

Again, I you make any profit please donate it to this site!!!

\Jens
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Old 19th September 2006, 07:30 PM   #3
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Hello Jens,

$29.35 USD is the cost price from the manufacturer for the quantity I ordered.
I can't make any money selling these boards at this price.


In the parts list it at your site,says that two groups of resistors are "to be defined" :


R41, R42, R43, R60,

R61, R62, R28, R30

and



R26, R34, R68, R69



How do I calculate these or what values should I use?
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Old 19th September 2006, 08:37 PM   #4
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Quote:
R26, R34 and R68, R69
the values will depend on Power Supply Voltage from your trafo
and most probably some other factors
... like values of you exemplar of output transistors
your chosen max output power limit and closed loop gain

I refer to the following schematic at DELTA AUDIO
http://www.delta-audio.com/Leach_Clo..._7.4.6_Sch.pdf

There might most surely be a topic in this Solid State forum
where all these details you want to know
has been discussed.

Jens will tell you more correct information.
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