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Old 19th March 2009, 05:14 PM   #81
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juma-- just ordered the parts to build 3 of the preamps for the F5--i took one of my F5's to a friends house to use with his epos speakers and with a passive preamp the F5 didn't have enough gain--would you have a pic of the underside of your board to help me with the layout??? thanks mark
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Old 19th March 2009, 05:58 PM   #82
stein2 is offline stein2  Serbia
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This layout?
(bottom side view)
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File Type: gif pre4f5-bjt-pcb.gif (20.6 KB, 2318 views)
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Old 19th March 2009, 07:19 PM   #83
Cobra2 is offline Cobra2  Norway
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What about SSTART?
SSTART Preamplifier
-should have the needed gain, and more...

Arne K
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Old 19th March 2009, 07:21 PM   #84
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THANKS!!!!
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Old 25th March 2009, 12:06 AM   #85
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Default PC board layout.

Quote:
Originally posted by stein2
This layout?
(bottom side view)

Hello Stein2, any chance you have an image of this board without components showing copper only? CAD files?

thanks, Joe
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Old 25th March 2009, 06:18 AM   #86
stein2 is offline stein2  Serbia
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Default Re: PC board layout.

Quote:
Originally posted by increek22



Hello Stein2, any chance you have an image of this board without components showing copper only? CAD files?

thanks, Joe

That layout is Juma's, borrowed from our local forum. I'm about to start working on my preamps, one of them being a simpler one... and one designed by Borbely with ECC86... I guess Juma will see this and act upon request.
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File Type: png jboz j310 + cap_mult-sch.png (2.1 KB, 2140 views)
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Old 25th March 2009, 06:21 AM   #87
stein2 is offline stein2  Serbia
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Default Borbely ECC86

and this is my favourite
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File Type: jpg borbely hybrid.jpg (31.9 KB, 2232 views)
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Old 25th March 2009, 06:23 AM   #88
stein2 is offline stein2  Serbia
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Default Borbely list

List of materials for Borbely's hybrid
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Old 25th March 2009, 06:30 AM   #89
stein2 is offline stein2  Serbia
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Default other preamp ideas...

http://www.hifi-forumi.com/forum/vie...st=0&sk=t&sd=a

For interested, browse through the subject and look at schematics for various preamp solutions, the subject is the same, preamps for F5 and no need to be registered to see the images... Most of those has been tested by Juma and proven to be working well with F5.
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Old 25th March 2009, 08:53 AM   #90
juma is offline juma  Germany
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Default Re: PC board layout.

Quote:
Originally posted by increek22

Hello Stein2, any chance you have an image of this board without components showing copper only? CAD files?
thanks, Joe

Here you are, copper side view:
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File Type: png pre4f5.png (15.3 KB, 1915 views)
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