diyAudio F5 Build Guide - Page 2

sjhomey · 9th October 2013, 02:34 AM

Thanks 6L6
The more I think about it and after reading about all the fakes around, I think maybe I will stick with the Vishays. I know I can get them from reputable dealers. I am starting to wonder about the 2SK170/2SJ74 I have. Do you know of reputable dealers selling them? I see FETAudio mentioned as a good source. Do you know of others? Thanks again.

JojoD818 · 9th October 2013, 03:25 AM

The diyAudio Store will be stocking limited numbers of the Linear System's LSK170/LSJ74.

Insanoff · 04:52 PM

Hi folks!
Maybe it's a dummy question but I found slight difference between two F5 amplifiers schematics. At least it should be 4.2V on left image. Also there are two capacitors on PCB board. Which one is correct one or better one?

And which PCB board do you prefer for this amp. I'm trying to make a short cut.

sohryuab · 11th August 2015, 06:23 AM

Could anyone provide the F5 V3.0 BOM?(2013-11-21 cviller layout)
Especially the "R35" on the PCB board.
Thanks a lot.

Erlend Sæterdal · 22nd December 2015, 02:24 PM

Do not try to use the RURG8060 for Class A power supply. I almost finnished my F5 Turbo V 3. Tried with a vario. The vario got hot and never more then ca, 0,8 vdc came to capacitors. They was oscillating no doubt.

: headshot:

kpsthakur · 10:45 AM

Guys I have a 0-18V X 2 secondaries toroidal transformer rated @ 600VA, do you think I can use it...

6L6 · 26th February 2017, 12:42 PM

Yes!

kpsthakur · 26th February 2017, 05:30 PM

Quote:

Originally Posted by 6L6

Yes!

Thank you...I just didn't want my dream F5 to go up in smoke...

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GordR · 28th February 2017, 07:36 PM

Looking for some help. I just finished assembling F5 amp using v3 boards/schematic and when I powered up to check/set bias things went up in smoke! In particular R7 and R8 lit up and Q1 and Q2 "popped". Looking at board it appears a few other resistors got hot too...R14, and R4 showing discoloration.

I have double checked, triple checked component placement/polarity and am coming up with nothing.

Any input would be greatly appreciated!

mattattnet · 2nd March 2017, 01:16 PM

I would try asking at the F5 Build guide thread for help:
An illustrated guide to building an F5

8th November 2013, 04:28 PM	#13
Insanoff diyAudio Member Join Date: Apr 2008 Location: Qax	Hi folks! Maybe it's a dummy question but I found slight difference between two F5 amplifiers schematics. At least it should be 4.2V on left image. Also there are two capacitors on PCB board. Which one is correct one or better one? And which PCB board do you prefer for this amp. I'm trying to make a short cut. Last edited by Insanoff; 8th November 2013 at 04:52 PM.

26th February 2017, 10:40 AM	#16
kpsthakur diyAudio Member Join Date: Sep 2016 Location: Delhi	Guys I have a 0-18V X 2 secondaries toroidal transformer rated @ 600VA, do you think I can use it... Last edited by kpsthakur; 26th February 2017 at 10:45 AM. Reason: updated for specs

26th February 2017, 12:42 PM	#17
6L6 diyAudio Moderator Join Date: Oct 2010 Location: Denver, Colorado	Yes! __________________ Illustrated Build Guides - Pass F4 - Pass B1 - Pass F5 - Pearl 2 - O2 HPA - Hagerman Bugle 2 - Pass Aleph J - Me at BA '13 -Pass F5Turbo - BA-3 Amp - BA-3 Preamp - F6 AmpCampAmp

28th February 2017, 07:36 PM	#19
GordR diyAudio Member Join Date: Nov 2016	up in smoke Looking for some help. I just finished assembling F5 amp using v3 boards/schematic and when I powered up to check/set bias things went up in smoke! In particular R7 and R8 lit up and Q1 and Q2 "popped". Looking at board it appears a few other resistors got hot too...R14, and R4 showing discoloration. I have double checked, triple checked component placement/polarity and am coming up with nothing. Any input would be greatly appreciated!

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9th October 2013, 02:34 AM	#11
sjhomey diyAudio Member Join Date: May 2010 Location: southern New Jersey	Thanks 6L6 The more I think about it and after reading about all the fakes around, I think maybe I will stick with the Vishays. I know I can get them from reputable dealers. I am starting to wonder about the 2SK170/2SJ74 I have. Do you know of reputable dealers selling them? I see FETAudio mentioned as a good source. Do you know of others? Thanks again.

9th October 2013, 03:25 AM	#12
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: searching...	The diyAudio Store will be stocking limited numbers of the Linear System's LSK170/LSJ74.

11th August 2015, 06:23 AM	#14
sohryuab diyAudio Member Join Date: Jun 2013	Could anyone provide the F5 V3.0 BOM?(2013-11-21 cviller layout) Especially the "R35" on the PCB board. Thanks a lot.

22nd December 2015, 02:24 PM	#15
Erlend Sæterdal diyAudio Member Join Date: Mar 2007	Do not try to use the RURG8060 for Class A power supply. I almost finnished my F5 Turbo V 3. Tried with a vario. The vario got hot and never more then ca, 0,8 vdc came to capacitors. They was oscillating no doubt. : headshot:

2nd March 2017, 01:16 PM	#20
mattattnet diyAudio Member Join Date: Jul 2004 Location: Minnesota	I would try asking at the F5 Build guide thread for help: An illustrated guide to building an F5

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