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Old 27th December 2008, 01:36 PM   #2401
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i have no chasis and it sounds very well on the table..maybe it will be better with chasis
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Old 27th December 2008, 04:04 PM   #2402
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Early chassis work:

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Pretty conventional I know. Paint and polish yet to be applied. The heatsinks are mounted with a spacer between them and the sides of the case. The plan is to mount the devices directly to the heatsink through a hole in the side wall of the case. The idea is to keep some of the heat out of the case and hopefully there will be a bit of a chimney effect in the gap between the heatsink and the case.

What about heatsinks for the diodes? I am using some T03P diodes - what sort of heatsinking can I expect these to need?

Fran
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Old 29th December 2008, 07:45 PM   #2403
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Default R11 and R12

Can R11 and R12 be 2 Watt resistors, assuming I use default settings and power supply?
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Old 29th December 2008, 09:17 PM   #2404
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Quote:
Originally posted by woodturner-fran
What about heatsinks for the diodes? I am using some T03P diodes - what sort of heatsinking can I expect these to need?
Any heatsinks
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Old 29th December 2008, 09:21 PM   #2405
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Many thanks. I kinda got concerned cos the heatsinks (2" thermalloy ones for T0220) get upto nearly 60 deg C on my mini aleph. So thinking that this might have a bigger current draw, I thought maybe it might need bigger heatsinks. Should have explained that.....

I have some fairly substantial ones lined up anyway.


Fran
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Old 2nd January 2009, 11:54 PM   #2406
Studley is offline Studley  United Kingdom
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Default JFETS

I'm trying to find somewhere to buy the Toshiba JFETS. There some ebay sellers based in HK and Taiwan but I've heard that there are lots of counterfeit copies being sold. I'm looking for some advice or the name of a pukka seller, anyone?
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Old 3rd January 2009, 12:12 AM   #2407
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Default Re: JFETS

Quote:
Originally posted by Studley
I'm trying to find somewhere to buy the Toshiba JFETS. There some ebay sellers based in HK and Taiwan but I've heard that there are lots of counterfeit copies being sold. I'm looking for some advice or the name of a pukka seller, anyone?
I think this guy has authentic parts. I ordered some chip amps a while back with no problems.

http://www.tech-diy.com/Store/SmallSignal.htm
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Old 3rd January 2009, 12:13 AM   #2408
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Default Re: Re: JFETS

Quote:
Originally posted by labjr


I think this guy has authentic parts. I ordered some chip amps a while back with no problems.

http://www.tech-diy.com/Store/SmallSignal.htm
Thanks labjr!
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Old 3rd January 2009, 06:09 PM   #2409
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That is our own member Jackinnj. I regard him as trustworthy.

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Old 3rd January 2009, 07:13 PM   #2410
Studley is offline Studley  United Kingdom
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Many thanks
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