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You can series/parallel oil caps in any desired fashion
to get your desired voltage/capacitance. Oil caps do not need
any equalizing resistors. You just need a bleeder resistor
across the output of the P.S. 200,000 ohms total will work fine.
Be sure to install a glitch resistor in the B+ line. Many joules
involved here!
Be careful!
Phil, K5PC
Subject: [AMPS] Capacitive Input Filter Cap
Hello List Members,
I have some Aerovox oil filled caps. (Non Pcb). They are 1700VDC@80uf. =
They are 6"tall,4"wide,3" deep. They have 2 ceramic bushings on top with =
1/4-20 threads. My question is could I parallel 2 of them and then =
series 4 sets of 2 for 6800VDC@40uf. Would 100Kohm equalizing resistors =
25 watts work? Im not sure if they are low esr caps if that would make a =
differance. I used a method described on Mr. Measures Website where I =
used a variac. I adjusted the voltage to give a couple of amps of A.C. =
current thru one of the caps. After about an hour it was barely warm. =
Any help,comments or suggestions appreciated.
73,s Jeff
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<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>You can =
series/parallel oil=20
caps in any desired fashion</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>to get your =
desired=20
voltage/capacitance. Oil caps do not need</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>any equalizing =
resistors. You=20
just need a bleeder resistor</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>across the output =
of the P.S.=20
200,000 ohms total will work fine.</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>Be sure to =
install a glitch=20
resistor in the B+ line. Many joules</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>involved =
here!</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" =
color=3D#0000ff></FONT> </DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>Be =
careful!</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>Phil,=20
K5PC<BR></FONT><B>Subject:</B> [AMPS] Capacitive Input Filter Cap</DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Hello List Members,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I have some Aerovox oil filled caps. =
(Non Pcb).=20
They are <A href=3D"mailto:1700VDC@80uf";>1700VDC@80uf</A>. They are=20
6"tall,4"wide,3" deep. They have 2 ceramic bushings on top with 1/4-20 =
threads. My question is could I parallel 2 of them and then series 4 =
sets of 2=20
for <A href=3D"mailto:6800VDC@40uf";>6800VDC@40uf</A>. Would 100Kohm =
equalizing=20
resistors 25 watts work? Im not sure if they are low esr caps if that =
would=20
make a differance. I used a method described on Mr. Measures Website =
where I=20
used a variac. I adjusted the voltage to give a couple of amps of A.C. =
current=20
thru one of the caps. After about an hour it was barely warm. Any=20
help,comments or suggestions appreciated.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>73,s =
Jeff</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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