|Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.|
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
||Thread Tools||Search this Thread|
|8th October 2003, 02:38 PM||#1|
Join Date: May 2003
Location: N. Cal
Field spotter's guide to capacitors
This is hopefully a basic question.
I have some old Marantz amplifiers from 1980 or so that I wish to freshen up a bit.
There are several types of capacitors easily seen on the circuit boards. The technical manual indicates that they are "film" capacitors, and gives the appropriate value, but I'm not sure if these are polycarbonate, mica, tantulum, etc. I generally have no problem spotting electrolytics.
This would be helpful in terms of specifying suitable replacements.
Some look like green chicklets, and some look like a wad of magic tape. Any ideas?
Thanks and regards,
|8th October 2003, 03:13 PM||#2|
Join Date: Nov 2002
Besides the value you don't need to know what Marantz put in there originally in 1980 as you will do better anyway. It more depends on the position in the circuit (AC signal coupling, PSU filtering etc.) what type fits best.
I belong to those who think that topology and active devices have the most influence on the sound. For the passive components, I use resonably priced high quality parts, nothing esoteric.
This is my personal capacitor selection guide, based on listening preference and local availability, valid for (pre-)amplifiers and other line level audio circuitry:
For the small electrolytics, I use "Panasonic FC" as I can get them at resonable prices. The bigger values (PSU) are "BC Components", series "154" or "051", sometimes "Roederstein EYS-07".
I don't use tantalum or ceramics in (analogue) audio.
For film type capacitor, my choice is as follows:
Up to about 10nF: Silver Mica, Styroflex (R) or Wima FKP-2, depending on budget and space available.
10 nF to 1µF: Siemens MKH or various Wima types
above 1µF (PSU filtering only): Wima MKP-10
above 1µF (AC coupling): Replace by wire if possible, optionally add DC servo. If not possible, re-design circuit or ask the passive components gurus for a suitable esoteric part.
Hope this helps.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Field Guide to Identifying Components ?||vonfilm||Parts||6||20th October 2008 04:52 AM|
|what is the difference between silver mica capacitors and ceramic capacitors ??||prorms||Solid State||1||6th May 2008 12:38 PM|
|Near field vs Far field||Audist||Multi-Way||17||25th May 2007 07:44 PM|
|Near field / far field?||2litre||Multi-Way||4||2nd January 2006 09:44 AM|
|differences between computer grade capacitors and small can capacitors||LBHajdu||Pass Labs||0||22nd February 2002 01:29 AM|
|New To Site?||Need Help?|