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The diyAudio Firstwatt F6
The diyAudio Firstwatt F6
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Old 1st August 2017, 09:04 PM   #1801
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by fabrice63 View Post
Is this "new" F6 been tested "musicaly" and "sonically" and mesured before , or it is one more F6 on the road , and what 's Nitrous for , I did not follow the entire story !!!

just wonder if it's a step forward

.

You can make it sound anyway you want.
You can build it exactly like the original circuit or any of the variations in the F6 article or even with 40V rails if you wanted, that's the reason for adding nitrous.
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Last edited by 2 picoDumbs; 1st August 2017 at 09:31 PM.
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Old 2nd August 2017, 09:45 AM   #1802
fabrice63 is online now fabrice63  France
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Got it , Thanks


.
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Old 12th August 2017, 04:17 AM   #1803
bk856er is offline bk856er  United States
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The diyAudio Firstwatt F6
Quote:
Originally Posted by Nelson Pass View Post
For M2's, I just bought some mu metal (by the foot) from McMaster-Carr
and folded it.

Worked fine, very cheap, quick delivery.


Would that be the 0.01" thick, 4" wide material? I'm curious to try this.


BK
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Old 12th August 2017, 06:15 PM   #1804
Nelson Pass is offline Nelson Pass  United States
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The diyAudio Firstwatt F6
I forget, but it sounds like it.
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Old 17th August 2017, 02:38 AM   #1805
bk856er is offline bk856er  United States
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Quote:
Originally Posted by Nelson Pass View Post
I forget, but it sounds like it.


Thx. Received today from McMaster (4x12x0.01") impeccably packaged, $74 delivered. Now in hand I see that it's a special material and worthy of doing it right. Will update with results. M2 primarily, maybe also F6 (clones).


BK
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Old 18th March 2018, 09:19 PM   #1806
silasmellor is offline silasmellor  Denmark
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The diyAudio Firstwatt F6
bk856er, did you get to try this on your F6? I am troubleshooting some buzz and wonder if shielding the input transformers might something to go for, so would be curious to hear what your results were.
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Old 19th March 2018, 05:30 AM   #1807
bk856er is offline bk856er  United States
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Quote:
Originally Posted by silasmellor View Post
bk856er, did you get to try this on your F6? I am troubleshooting some buzz and wonder if shielding the input transformers might something to go for, so would be curious to hear what your results were.


Sorry, the sheet material is still sitting on the bench waiting to be cut and shaped into a cute little box, so can't speak from experience here!


BK
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Old 11th April 2018, 10:17 AM   #1808
fabrice63 is online now fabrice63  France
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Hi all,

I finally give my F6 some nice almost perfect matched IRFP240 , and here are the distortion numbers that came out , using an UCA222 calibrated sound card .

test made at 1 Watts , with 8.0 ohm non inductive load , 0.500 v bias , R1 and R2 0.47 ohm



Click the image to open in full size.


.

Last edited by fabrice63; 11th April 2018 at 10:21 AM.
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Old 23rd April 2018, 09:10 AM   #1809
tower2010 is offline tower2010  Spain
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Quote:
Originally Posted by Zen Mod View Post
here it goes
Quote:
Originally Posted by Zen Mod View Post
BC546/556 ,BC547/557 , BC550/560 , ZTX450/550

also - increase mosfet gate resistors to , say, 220R


Hello,

Has anybody tried Turbo version proposed by Zen Mod? I would like to know if it is feasible and how it sounds...

It would nice a similar approach for M2

Thanks.
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Old 10th May 2018, 09:27 AM   #1810
forgehammer67 is offline forgehammer67
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Hello everyone.

I would like build an amp diy, it will be my first achievement so i'm looking for a relatively simple amp to build. This would be to power Klipsch RF7-MKII speakers. These speakers require an amp sound rather soft and warm, or at least not aggressive in the medium-high frequencies.

I think to realize the Firstwatt F6 or F5. Do you think that these amp would make a good association with Klipsch RF7-MKII.

Thanks for your advices.

Thierry
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