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Old 26th February 2008, 09:21 PM   #2071
tms0425 is offline tms0425  United States
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Yeah, I knew it needed either a screwdriver or a really big hammer
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Old 26th February 2008, 09:27 PM   #2072
DaveM is offline DaveM  United States
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I believe correct name for the tool you are referring to is the maximum force adjustment tool. One of my favorites as well.
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Old 26th February 2008, 11:24 PM   #2073
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Quote:
Originally posted by tms0425


Yeah, I knew it needed either a screwdriver or a really big hammer


Yeah . . . I said the screwdriver is very essential diy audio tool . . .

I have used silpad between the sink and mosfets since I started my diy audio. So far, I have not met any problem with it . . .



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Old 27th February 2008, 02:21 PM   #2074
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Quote:
Just joking!! ...Found the Banzai place very easy to deal with and very reasonable ,all things considered. In the states we often find it difficult to obtain the more exotic parts .
You guys do know that Digikey carries the Elna RFS (silmik II) caps as well, right? They are dirt cheap.

here
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Old 27th February 2008, 09:23 PM   #2075
Variac is offline Variac  United States
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only up to 35 v though. Of course that's more than enough for the F4...
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Old 27th February 2008, 10:02 PM   #2076
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Quote:
Originally posted by BrianDonegan


You guys do know that Digikey carries the Elna RFS (silmik II) caps as well, right? They are dirt cheap.

here

Thanks for the heads-up!
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Old 2nd March 2008, 08:40 PM   #2077
tms0425 is offline tms0425  United States
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Default My first F4 is alive!

My first of two F4's is finally up and running in a "mule" sort of case. I'm currently running it stereo on the HF of my biamped OB Emerald Physics CS2's with great results so far (100db efficient compression driver in a waveguide). Gain is provided from a Behringer DCX with Jan Didden output board and a Burson Buffer (fixed to +12db). Not quite enough to swing the full voltage but seems plenty for my HF drivers at the levels I need.

I used two Plitron 300VA dual 18vac trafo's in it with two Peter Daniels PS boards, 2 bridges/4 caps each per channel. I originally planned one of these transformers and one PS board for each stereo amp, but it was irresistable to go ahead and set it up this way. The rails are at about 24.5vdc (hopefully a little bit high is ok?). With 200ma across the source resistors, it's only running 41C on the Conrad MF35-151.5 heat sinks after a couple hours or so. Once warmed up, it settled right in and really sounds terrific. Can't wait to do some further tweaking with various parts to see how far you can really take it.

Next up is the second monoblock and an Aikido gain stage to provide the full swing if I need it.

Again, as usual, thanks Nelson for sharing this!

Tom
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Old 3rd March 2008, 12:57 AM   #2078
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Wonderful news! Isn't it great to have one of the finest sounding amps on the market in your home?

Keep us posted on your Aikido gain-stage/F4 results.
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Old 7th March 2008, 11:50 AM   #2079
tms0425 is offline tms0425  United States
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...Being somewhat new here, I searched rules, but still wasn't sure if it is ok to post as images. If not I can change to attachments. Tom
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Old 7th March 2008, 02:20 PM   #2080
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You can post pics and attachments....I think up to 100kb. So keep the size down or link to somewhere that can host large images.

C
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