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Old Yesterday, 06:37 PM   #241
jan492 is offline jan492
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Join Date: Oct 2019
Location: Baltimore
...Also watching with rapt attention since I will be building one soon.. Just got my chasis and digikey order.. Sorry to hear about your setback, flamethrower, but thank you for documenting it! It could help many people (myself included) someday..
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Old Yesterday, 08:26 PM   #242
invaderzim is offline invaderzim  United States
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Join Date: Oct 2015
Quote:
Originally Posted by flamethrower1 View Post
What a stupid thing to do
There is stupid and then there is a moment of inattention, a brief distraction or the ever lurking "one more thing and then I call it good".

I've banged my head against the wall going "stupid, stupid, stupid" plenty of times. Just last week I fired up my ESP P3A amp for the first time and after a bit decided that I should really try swapping the SMPS power supply for a linear one to see if the noise dropped and so I tapped into the power supply of another amp I'd built. Except I reversed the white and black wire "wait, which one was negative and which was ground?" The magic smoke escaped.
And this was after swearing up and down that I was going to do things right this time. I'd been patient and made sure and got all the components solidly mounted in the case and all the wires run correctly and secured.
I'd assembled the case so nothing could get moved and pull on a wire; all before powering it up. It was all working perfectly; then my brain faded and I quickly dragged wires over from another case over and.....

Last edited by invaderzim; Yesterday at 08:29 PM.
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Old Yesterday, 08:54 PM   #243
Dennis Hui is online now Dennis Hui  Canada
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Join Date: Aug 2002
Location: Toronto, Canada
F5 V3
Flamethrower1,

As you can see, many of us have made mistakes in our diy builds. My early
mini Aleph actually had flame bursting out of a CRC resistor in the power supply.
Things happen...and it's part of the learning process.

And there are many members here who will cheer you on as you fix your amp.
As 6L6 said earlier, it's absolutely fixable.

One of the great things about the F5 is that there are so few parts, and all,
aside from the jfets, are readily available. My guess is the jfets are fine; we
can do a basic test in circuit later.

The hardest part of the repair will likely be desoldering some parts...

Cheers,
Dennis
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We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002
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Old Yesterday, 09:11 PM   #244
Mrshazbot is online now Mrshazbot  United States
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Join Date: Oct 2017
Location: San diego
F5 V3
I fried a channel on my F5 which was also my first major build. I had to rebuild the boards from scratch and since I had to order two boards, the parts kits, etc I just rebuilt both channels. The great thing was that it took me only 20% of the time to do it the second time around so it was rather quick and pain free.

Kevin
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Old Yesterday, 11:08 PM   #245
tooppy is offline tooppy  France
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Seeing the difficulties some encounter, I am glad to have done what I did.
This means, I followed the building guide and the bom scrupulously. I tested every part before soldering and just after. My F5 has been then very wise and didn't gave me any trouble, except one condenser which leaked after few hours run.
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Old Today, 12:43 AM   #246
flamethrower1 is online now flamethrower1  United States
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Join Date: Sep 2015
Location: Wisconsin
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Quote:
Originally Posted by Mrshazbot View Post
I fried a channel on my F5 which was also my first major build. I had to rebuild the boards from scratch and since I had to order two boards, the parts kits, etc I just rebuilt both channels. The great thing was that it took me only 20% of the time to do it the second time around so it was rather quick and pain free.

Kevin
Was surprised to see so many people responding to my "initiation".
All I can say is wow and thank you.
Why cant the whole world work like this.
What happened was my doing I am sure.
Going to address training issues in a meeting tomorrow ( of coarse baggles will be served).
So the above post is where I leaning toward after thinking about things today.

Thanks for your support

Greg
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Old Today, 01:30 AM   #247
ItsAllInMyHead is offline ItsAllInMyHead  United States
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Join Date: Mar 2019
Location: The great state of Minnesoooota.
Quote:
Originally Posted by flamethrower1 View Post
...Why cant the whole world work like this...
+1
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Old Today, 02:50 AM   #248
flamethrower1 is online now flamethrower1  United States
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Join Date: Sep 2015
Location: Wisconsin
F5 V3
We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002

Should read:
We are fearless amplifier builders. A little heat doesn't scare us at all.
Disclaimer,if you see smoke, you balled something up or you took it to far
- NP 2002
Hope that isn't a copy right infringement or something
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