Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

A guide to building the Pass F4 amplifier.
A guide to building the Pass F4 amplifier.
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th June 2019, 10:05 PM   #1331
cal3713 is offline cal3713
diyAudio Member
 
Join Date: Mar 2014
Now that both F4s are singing, I thought I'd post my corrected parts lists... As before, happy to send the excel document if anyone wants it.

Thanks again everyone. I love this site/community.
Attached Images
File Type: jpg F4 Full Parts List.JPG (298.1 KB, 173 views)
Attached Files
File Type: pdf F4 Full Parts List.pdf (566.3 KB, 12 views)
  Reply With Quote
Old 18th June 2019, 06:02 AM   #1332
kecapmanis021 is offline kecapmanis021  Indonesia
diyAudio Member
 
kecapmanis021's Avatar
 
Join Date: Jul 2017
Quote:
Originally Posted by cal3713 View Post
Now that both F4s are singing, I thought I'd post my corrected parts lists... As before, happy to send the excel document if anyone wants it.

Thanks again everyone. I love this site/community.
May I ask why you used Carbon Film 10K for R6 and R7? Is it because R6 and R7 directly in signal path?

One more thing, I noticed you used RN60 for metal film. Do all of them fit well on the PCB? RN60 is quite long and fat. Thanks.

~Kecap
  Reply With Quote
Old 18th June 2019, 10:01 AM   #1333
kecapmanis021 is offline kecapmanis021  Indonesia
diyAudio Member
 
kecapmanis021's Avatar
 
Join Date: Jul 2017
I'm being offered matched pair of:

2SK170V/2SJ74V; V= 10-20 mA (really 11-17 mA)
2SK170BL/2SJ74BL; BL= 6-12 mA (really 6.8-11 mA)
2SK170GR/2SJ74GR; GR= 2.5-6.5 mA (really 3-6 mA)

I'd appreciate some help to pick which is best option to go with. Thanks.

~Kecap
  Reply With Quote
Old 18th June 2019, 10:46 AM   #1334
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
A guide to building the Pass F4 amplifier.
BL are usual with Papa's conctructions
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 18th June 2019, 10:56 AM   #1335
kecapmanis021 is offline kecapmanis021  Indonesia
diyAudio Member
 
kecapmanis021's Avatar
 
Join Date: Jul 2017
Quote:
Originally Posted by Zen Mod View Post
BL are usual with Papa's conctructions
Well noted ZenMod. BL is way to go then. Thanks.

~Kecap
  Reply With Quote
Old 18th June 2019, 01:06 PM   #1336
elnaf is offline elnaf
diyAudio Member
 
Join Date: Jun 2019
Hi, I am about to build a crippled f4. I have all parts in right value at hand except the zener diode. I have the 9.1V (1N4739) but not the 6.8V (1N4736) as specified in the BOM. Will it work to use 9.1V instead?
Thanks in advance
  Reply With Quote
Old 18th June 2019, 01:41 PM   #1337
Zen Mod is offline Zen Mod  Serbia
Official Court Jester
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
A guide to building the Pass F4 amplifier.
if you're thinking of D1 and D2 , ref. to schm in post #1, use whatever you have in range of 6V2 to 10V

they're here to protect mosfets of excessive Ugs
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 18th June 2019, 01:44 PM   #1338
elnaf is offline elnaf
diyAudio Member
 
Join Date: Jun 2019
Great, thanks!
  Reply With Quote
Old 18th June 2019, 04:27 PM   #1339
cal3713 is offline cal3713
diyAudio Member
 
Join Date: Mar 2014
Quote:
Originally Posted by kecapmanis021 View Post
May I ask why you used Carbon Film 10K for R6 and R7? Is it because R6 and R7 directly in signal path?

One more thing, I noticed you used RN60 for metal film. Do all of them fit well on the PCB? RN60 is quite long and fat. Thanks.

~Kecap
The cheaper carbon films were used for LED resistors. I think I chose them because I copied someone else's purchase. If I were to reorder, I'd just buy extra RN60s and use them there. As for the choice of RN60, I chose them because I had trouble finding RN55s and wanted Dale/Vishay resistors... just got forced into that size by mouser/digikey.

Here's a look at what a populated board is like. Everything there is RN60.
Attached Images
File Type: jpg 20190516_141046_2.jpg (797.5 KB, 131 views)
  Reply With Quote
Old 19th June 2019, 02:32 AM   #1340
kecapmanis021 is offline kecapmanis021  Indonesia
diyAudio Member
 
kecapmanis021's Avatar
 
Join Date: Jul 2017
Quote:
Originally Posted by cal3713 View Post
The cheaper carbon films were used for LED resistors. I think I chose them because I copied someone else's purchase. If I were to reorder, I'd just buy extra RN60s and use them there. As for the choice of RN60, I chose them because I had trouble finding RN55s and wanted Dale/Vishay resistors... just got forced into that size by mouser/digikey.

Here's a look at what a populated board is like. Everything there is RN60.
I see, I made a wrong assumption then. It's a hassle to stock CF just for those LED. Thanks for the picture. Those RN60 looks like little sausage squeezed together.

~Kecap
  Reply With Quote

Reply


A guide to building the Pass F4 amplifier.Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
An illustrated guide to building an F5 6L6 Pass Labs 1185 4th April 2019 03:42 AM
A Concise Guide to the Published Amplifier Circuits of Nelson Pass rsdio Pass Labs 55 6th November 2018 05:40 PM
My,PASS ALEPH J and f4 xr000 Pass Labs 1 25th December 2009 03:20 AM
Idiot´s guide to building Pass amps? judge Pass Labs 3 19th December 2004 11:33 PM


New To Site? Need Help?

All times are GMT. The time now is 05:42 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki