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Old 23rd April 2019, 06:11 AM   #4661
Variac is offline Variac  Costa Rica
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Pictures of your diy Pass amplifier
Quote:
Originally Posted by elvenears View Post
Burning Amp Salad
Exactly!
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Old 7th May 2019, 12:09 PM   #4662
rhthatcher is offline rhthatcher  United States
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Location: Beachwood, Ohio (Cleveland Area)
An F5 is born!



I recently rebuilt several Rawson amps for me and a friend - 2 Stereo Aleph Mini J's, 4 Aleph J Mono blocks, and a PSU on another F5. All had missing safety earths. IIRC, all but one had a single rectifier. Some wiring was scary. They're all fixed up now. You can see the pic of the old PSU boards from the bone pile. I learned a ton in the process.



The newest project I completed last night was taking a Rawson Gainclone and using the chassis to make a nice F5. Only original parts are chassis, feet, RCA's, LED, and binding posts. Thanks to this site I learned several things incorporated into the build. I used a quasimodo jig to measure snubbers. I used Jeff Young's PSU board design to make a dual rail decoupled power supply. And I have to give a huge THANK YOU to Jim "6L6" for the support over the past months. And yesterday, he was a huge help in demystifying the F5 Biasing process. It's a bit tricky, but he made it easy for me.



The amp sounds fantastic on the test speakers. Next I'll put it in the main system.
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Old 7th May 2019, 11:57 PM   #4663
JeffYoung is offline JeffYoung  Ireland
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Well done, Randy!
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Old 8th May 2019, 01:10 AM   #4664
Eric is offline Eric  United States
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Yes, Well done again! In a sad sort of way, there seems to ALWAYS be a market for cleaning up the messes that others make
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My DIY Basement Theater, Aleph-X Amps, LDR based BA-3 pre, Pearl II, highly modded Technics SL-1200, F4, M2, Aleph-J, MoFo, a40, several ACAs, FHXL, Tang Band 1772 bass-reflex
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Old 13th May 2019, 05:17 PM   #4665
Nitram86 is offline Nitram86
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Default MY F5TV3

My F5TV3.
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Old 13th May 2019, 10:02 PM   #4666
Mod Man is offline Mod Man  United States
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The last image says it all.
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Old 14th May 2019, 07:12 PM   #4667
Danger Mouse is offline Danger Mouse  Germany
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Location: beautiful Oberpfalz Bavaria
Do the heat sinks work in this orientation? enough Ventilation? Do you have a hole in the Bottom plate under the sinks?
I also thougt About this way to mount the heatsinks. but be worried they may get to warm.
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Old 15th May 2019, 01:23 PM   #4668
Nitram86 is offline Nitram86
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WE have used two 120mm fans in each. They kick in when needed and stabilize the temperature. Lots of messing about and a custom fan controller with thermistors but so far so good. They are running at 46c and maintain this constant temperature.
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Old Today, 04:56 AM   #4669
BadToTheTone is offline BadToTheTone  Canada
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Default ACA v1.6 Monoblocks

Got 'em done, finally. Here's a pic of them sitting on top of their little brothers for comparison. Look good, sound great.
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Old Today, 07:32 AM   #4670
nicoch58 is offline nicoch58  Europe
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Quote:
Originally Posted by elvenears View Post
I recomend Italian Extra Vergine Olive Oil. Makes the amp sing like Pavaroti.
you must add some Amarone
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