F5 Turbo Builders Thread - Page 79

nrg2009 · 4th January 2013, 10:07 PM

Audiosan, we want to see more boards complete, my advice: Go fast and take chances..
Love to see photos.

AudioSan · 4th January 2013, 10:12 PM

hehehe nrg

i have one front end and 4 output boards finnished now

maybe it will be sound over the weekend

BTW: all was soldered without looking at a bom or schematic

i know this curcuit too well

buzzforb · 4th January 2013, 10:13 PM

THe F5 is a really tough design. I have been using the PSU to proto a J2 and once, when i hooked up the psu back to the F5T boards, I accidentally hooked up the positive wire to the output hole. Fried a fuse, nothing else, It is the perfect amp for first time builders. It just so happens, you get a phenominal amp. I can see the V3 competing against anything and have got a preliminary layout for a balanced version, to take advantage of excess current available at low rail voltages.

AudioSan · 10:54 PM

wow. you have realy taken it to the limit

i'm not a first time builder. i have a F5 on steroids allready

i have the balanced recepi in my head allready

but i'm not going to build it. i stick with the good old single end

i can handle the extra voltage

a.wayne · 4th January 2013, 11:35 PM

Quote:

Originally Posted by AudioSan

thats what i was thinking too. so i went for 16.4V

one channel is finnished now. well, exept output fets and diodes.
just hoping i get the sinks cut tomorrow

PSU or trans voltage ...? any boards at the store yet .... ?

AudioSan · 4th January 2013, 11:55 PM

wayne. 16.4V is the cascode voltage. rail voltage vil be around +/-51V with 2.5A bias.
no boards in the store yet. i use the first prototype boards from UKToecutter.

nrg2009 · 5th January 2013, 01:14 AM

I haven't heard from UKToecutter in a looong time. I hope he is doing well. He did a very nice job designing these boards..

AudioSan · 5th January 2013, 01:20 AM

nrg. he did a bond on us. a Aston martin vanish

he left the job half done, i'll know. i was the one rectifing the smal faults that was on the boards. alldoh i use those prototype boards on my monoblocks. it was only marking errors.
i'm just crossing my fingers and hope there is nothing else

i don't think there is. i have went thrue this curcuit and boards 100 times

nrg2009 · 5th January 2013, 02:42 AM

Audiosan, you are on a large stage with many folks watching you and awaiting your results.
We need to keep our fingers crossed that it all works.. can you see any changes in layout at this point? I will read back in this thread and find the post with a photo of the boards.. i need to refresh my mind as to what they look like again..

AudioSan · 5th January 2013, 03:36 AM

nrg. the big changes is that R3 and R4 has been 3W insted of 0.6W. and Q5/Q6 has been turned 180 degrees. and N-ch output and P-ch output has been switched

4th January 2013, 10:12 PM	#782
AudioSan diyAudio Member Join Date: Feb 2009 Location: Trondheim	hehehe nrg i have one front end and 4 output boards finnished now maybe it will be sound over the weekend BTW: all was soldered without looking at a bom or schematic i know this curcuit too well __________________ aleph P1.7 pre. F5 power amp. CDpro2(need DAC). Vivaldi8 speakers

4th January 2013, 10:13 PM	#783
buzzforb diyAudio Member Join Date: Oct 2010 Location: Burlington, NC	THe F5 is a really tough design. I have been using the PSU to proto a J2 and once, when i hooked up the psu back to the F5T boards, I accidentally hooked up the positive wire to the output hole. Fried a fuse, nothing else, It is the perfect amp for first time builders. It just so happens, you get a phenominal amp. I can see the V3 competing against anything and have got a preliminary layout for a balanced version, to take advantage of excess current available at low rail voltages. __________________ \|F6 Kit/Trasnformer GB Sign up sheet Closed,\|Primrose GB Sign Up sheetClick Here ...Shape the sound , Man!

4th January 2013, 10:52 PM	#784
AudioSan diyAudio Member Join Date: Feb 2009 Location: Trondheim	wow. you have realy taken it to the limit i'm not a first time builder. i have a F5 on steroids allready i have the balanced recepi in my head allready but i'm not going to build it. i stick with the good old single end i can handle the extra voltage __________________ aleph P1.7 pre. F5 power amp. CDpro2(need DAC). Vivaldi8 speakers Last edited by AudioSan; 4th January 2013 at 10:54 PM.

4th January 2013, 11:55 PM	#786
AudioSan diyAudio Member Join Date: Feb 2009 Location: Trondheim	wayne. 16.4V is the cascode voltage. rail voltage vil be around +/-51V with 2.5A bias. no boards in the store yet. i use the first prototype boards from UKToecutter. __________________ aleph P1.7 pre. F5 power amp. CDpro2(need DAC). Vivaldi8 speakers

5th January 2013, 01:20 AM	#788
AudioSan diyAudio Member Join Date: Feb 2009 Location: Trondheim	nrg. he did a bond on us. a Aston martin vanish he left the job half done, i'll know. i was the one rectifing the smal faults that was on the boards. alldoh i use those prototype boards on my monoblocks. it was only marking errors. i'm just crossing my fingers and hope there is nothing else i don't think there is. i have went thrue this curcuit and boards 100 times __________________ aleph P1.7 pre. F5 power amp. CDpro2(need DAC). Vivaldi8 speakers


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4th January 2013, 10:07 PM	#781
nrg2009 diyAudio Member Join Date: Apr 2009 Location: Detroit, born and raised in the netherlands.	Audiosan, we want to see more boards complete, my advice: Go fast and take chances.. Love to see photos.

5th January 2013, 01:14 AM	#787
nrg2009 diyAudio Member Join Date: Apr 2009 Location: Detroit, born and raised in the netherlands.	I haven't heard from UKToecutter in a looong time. I hope he is doing well. He did a very nice job designing these boards..

5th January 2013, 02:42 AM	#789
nrg2009 diyAudio Member Join Date: Apr 2009 Location: Detroit, born and raised in the netherlands.	Audiosan, you are on a large stage with many folks watching you and awaiting your results. We need to keep our fingers crossed that it all works.. can you see any changes in layout at this point? I will read back in this thread and find the post with a photo of the boards.. i need to refresh my mind as to what they look like again..

5th January 2013, 03:36 AM	#790
AudioSan diyAudio Member Join Date: Feb 2009 Location: Trondheim	nrg. the big changes is that R3 and R4 has been 3W insted of 0.6W. and Q5/Q6 has been turned 180 degrees. and N-ch output and P-ch output has been switched __________________ aleph P1.7 pre. F5 power amp. CDpro2(need DAC). Vivaldi8 speakers

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