Question about Fender brown/blonde filter caps

[g-man]

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[Ed_Chambley]

This means 20uf / 600v  The "P" you may be wondering abut means polarized.  Polarized means they have a negative and positive.  Was not uncommon for Elytics in the early 60's to 600 or higher voltage.

[g-man]

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[Ed_Chambley]

I do not as I am not a pic kind of guy.  I do have plenty of 1000v poly caps and some 1000 volt electrolytics.  I am sure if look at images on Google you can see plenty.  Even in the 30's and 40's voltages were much higher and caps were as well.  The old radios I have, it is common to see 1000v caps.  Also on Hammond Organs it is common even though the voltages do not get that high.
Keep in mind the old caps were not the same and would reform when used, even new caps do some.   I have 2 Zenith Giant radios I reformed caps that are very strange and are 1600v.
 
Read the http://el34world.com/Forum/index.php?topic=16934.msg168110#msg168110
and read what HBP says about the cap in the line out.

[sluckey]

Do you have a pic of one?

Here's a pic of two 20µF @600V caps in a Sunn Sceptre from 1971. Those same caps were available in the '60s and are still available today.

[Ed_Chambley]

Do you have a pic of one?

Here's a pic of two 20µF @600V caps in a Sunn Sceptre from 1971. Those same caps were available in the '60s and are still available today.

Wow, where are you buying USA 600v caps?  Those are 200uf.  Where can I get some 600v, USA 20uf?    I would like some 50uf's as well.


Truth is if the are no longer in high demand they are not being made anymore.  Theses are rare are they not?

[Ed_Chambley]

Darn, I can see them, they are 20uf/600v.  Where did you get those?  Really, I need some.

[Ed_Chambley]

Found them.  AES, who would have thunk it.  I ordered some.  Thanks for posting this.

[g-man]

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[HotBluePlates]

Wow, where are you buying USA 600v caps?  Those are 200uf.  Where can I get some 600v, USA 20uf? 

Look closely, those were both Sprague Atom caps. In fact, the date codes are staring at you, right above the "Made in USA": 26th week of 1986 (for the older yellow series) and 4th week of 1988 (for the newer blue series).

[Ed_Chambley]

Do you have a pic of one?

Here's a pic of two 20µF @600V caps in a Sunn Sceptre from 1971. Those same caps were available in the '60s and are still available today.
Wow, where are you buying USA 600v caps?  Those are 200uf.  Where can I get some 600v, USA 20uf? 

Look closely, those were both Sprague Atom caps. In fact, the date codes are staring at you, right above the "Made in USA": 26th week of 1986 (for the older yellow series) and 4th week of 1988 (for the newer blue series).

Wow you eyes are good.  These have some age on them and I read where they have been discontinued.  I have a couple of SUNN amps that need a little doctoring and I wanted to avoid series caps if I could.  I am sure the ones from AES will have some age on them, but I will bring them up slow.

[Ed_Chambley]

Can you use two capacitors in series to get the voltage?

I could, but if you will read my post closely that is what I meant when I said I want to avoid series caps if I could.


So to answer your question.  I want to avoid series caps if I can.  It looks neater in the chassis, however I have done it when necessary.

[stratele52]

Can you use two capacitors in series to get the voltage?

Caps in series MFD are dive by 2 , volts multiply by 2 . You must put 220 K resistor , 1/2 watt on each capacitor.


You need two 40 MFD 300 volts = 20 MFD 600 volts


Why your post is on the schematic section ? Better in amps section , more experts

[sluckey]

Caps in series MFD are dive by 2 , volts multiply by 2 . You must put 220 K resistor , 1/2 watt on each capacitor.

That's only true if the caps are the same value. Some amps like the DRRI use series caps of different values, so you have to use more complicated math rather than divide by 2 or multiply by 2.