F5 pcb group buy... - Page 62 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 14th December 2010, 04:35 PM   #611
Spev is offline Spev  United Kingdom
diyAudio Member
 
Join Date: Jun 2005
Location: uk
Anyone running F5 with DCB1 pre? Any issues with them both being dc coupled?
  Reply With Quote
Old 14th December 2010, 04:39 PM   #612
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
increased risk of damaged speakers.
__________________
regards Andrew T.
  Reply With Quote
Old 14th December 2010, 04:42 PM   #613
Spev is offline Spev  United Kingdom
diyAudio Member
 
Join Date: Jun 2005
Location: uk
le bummer. So I suppose a cap at one or other end of the chain would be in order.
  Reply With Quote
Old 14th December 2010, 04:45 PM   #614
Tea-Bag is offline Tea-Bag  United States
not politcally affiliated
diyAudio Member
 
Tea-Bag's Avatar
 
Join Date: Feb 2006
Location: Kennebunk
Blog Entries: 7
Sure I do,
However there is a risk of DC offset failure with the F5 itself. The DCB1 doubles that risk if there is a failure there.
__________________
Last 2014 Salas GB, On Order|F5TC Boards and power supplies available PM| Hot-Rod DCB1 boards and kits available PM
  Reply With Quote
Old 14th December 2010, 04:57 PM   #615
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
What are your speakers? Full range or multi-driver.
The bass driver is likely to have to pass any DC output offset.
The Mid and Treble drivers are very likely to have a capacitor that provides DC protection (if the rating is high enough).
The capacitor can be a film type for both these passband frequencies

Are you planning to use your 27W ClassA amplifier to drive the bass speaker?
__________________
regards Andrew T.
  Reply With Quote
Old 14th December 2010, 05:01 PM   #616
JBdV is offline JBdV  Netherlands
diyAudio Member
 
Join Date: Mar 2009
DC protection might make more sense then adding caps all over the place ;-)

Jan
  Reply With Quote
Old 14th December 2010, 05:02 PM   #617
Spev is offline Spev  United Kingdom
diyAudio Member
 
Join Date: Jun 2005
Location: uk
Multi driver. My bass drivers have passed DC in the past and didn't take too kindly to it

Amp would drive the whole shebang.

Good point Jan, and precisely what i have in my amp at the moment given its previous meltdown...
  Reply With Quote
Old 15th December 2010, 08:05 AM   #618
sugden is offline sugden  Singapore
diyAudio Member
 
Join Date: Jan 2007
Location: Jurong West
Hi Peter,
If I wish to build F5 in mono block, what is the minimun transformer VA should I use? And what is minimum value of uF for the two electrolyte capacitor on PS boards?

Regards
MartinTie
__________________
  Reply With Quote
Old 15th December 2010, 12:23 PM   #619
diyAudio Member
 
ggetzoff's Avatar
 
Join Date: Nov 2004
Location: Southwest
Peter,

Boards all gone I'm assuming?

Thanks,

Greg
__________________
Airline Pilot-If it's not Boeing I'm not going.
"Brain as big as a planet..." {sic} Nelson Pass
  Reply With Quote
Old 15th December 2010, 02:06 PM   #620
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
This GB (3rd re-run) was just opened, so plenty of boards are available.

Quote:
Originally Posted by sugden View Post
Hi Peter,
If I wish to build F5 in mono block, what is the minimun transformer VA should I use? And what is minimum value of uF for the two electrolyte capacitor on PS boards?
I would go with 300VA, but 200VA should work fine too. As to caps, minimum would be 10,000uF per cap.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
F3 pcb group buy... h_a Group Buys 253 23rd December 2008 01:40 PM
new to group Lemalin22 Introductions 3 22nd June 2007 02:22 AM
What a group! EvilGenius Introductions 6 25th May 2006 06:16 PM
ono group buy xsnailx Pass Labs 106 14th March 2004 02:24 AM


New To Site? Need Help?

All times are GMT. The time now is 04:13 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2