tube dac - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 21st January 2002, 04:04 AM   #1
Fossil is offline Fossil  Singapore
diyAudio Member
 
Join Date: Sep 2001
Location: SG
Default tube dac

I received a MF tubalog from a friend and was wondering if there's anything I could do with those brownish caps in the tube buffer circuit.
can anyone tell me what type of caps r these (brown epoxy coated that is shaped like a pillow)? Also, what does, say, 474J means?
help needed!
  Reply With Quote
Old 21st January 2002, 09:22 AM   #2
diyAudio Member
 
Join Date: Jan 2002
Location: nowhere
Those are most likely film caps, should be okey. The numbers are referenced to pF. the first two digits are values and the third are how many zeroes behind. So 474 is 470000pF=470nF=0.47F
(103=10000pF=10nF=0.01F, etc, etc)
  Reply With Quote
Old 22nd January 2002, 08:00 AM   #3
Fossil is offline Fossil  Singapore
diyAudio Member
 
Join Date: Sep 2001
Location: SG
would those polyester (WIMA or Philips square boxes type) caps be an improvement?
  Reply With Quote
Old 22nd January 2002, 03:18 PM   #4
tvi is offline tvi  Australia
diyAudio Member
 
tvi's Avatar
 
Join Date: Apr 2001
Location: Moonee Ponds, Vic, Australia
Sund like generic mylar/polyester caps, the "j' is most likley denotes the tolerance

have a look at
<a href="http://www.effective.com.hk/EF_MPFC.htm">brown mylar pillows</a>


Regards
James
  Reply With Quote
Old 30th January 2010, 09:27 AM   #5
hew128 is offline hew128  Singapore
diyAudio Member
 
Join Date: Jan 2006
Location: Singapore
Hi,

Was wondering what was eventually done on your Tubalog? I have a unit as well and am researching on possibilities to optimise it.

Thanks!
  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
need diy tube preamp (line-stage) recommendation and general tube advice Musiclover4 Tubes / Valves 16 18th May 2013 04:19 PM
FS tube tuner, Active filter kit, tube amp, amp3 Josephjcole Swap Meet 9 20th July 2007 05:05 PM
SS or tube voltage amplifying stages in an amp with tube output? ray_moth Tubes / Valves 14 4th July 2007 04:09 AM
tube driving the same tube - whats the collective word? zobsky Tubes / Valves 3 13th June 2005 07:47 AM


New To Site? Need Help?

All times are GMT. The time now is 03:57 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