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<p>John,</p>
<p>Those types of capacitors were use lot in tube gear and
electronics up until the early 70s. There are places out there
that sell stuff for tube amps out there still. Look for places
that sell NOS (New Old Stock) parts for tube amps, guitar amps.</p>
<p>Here is one I've bought stuff from a while ago:<br>
<a class="moz-txt-link-freetext" href="https://www.tubesandmore.com/">https://www.tubesandmore.com/</a></p>
<p>What a lot of people do now is take the individual caps and tie
wrap them together using heat shrink to protect the leads as
needed.</p>
<p>Jay S.<br>
</p>
<div class="moz-cite-prefix">On 6/7/2020 9:25 AM, John Speth via
Synth-diy wrote:<br>
</div>
<blockquote type="cite"
cite="mid:51be25ec-322a-2cd3-93c0-d272f0762b3b@yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<p>Hi experts,</p>
<p>I'd like to attempt hum elimination on a 1972 Wurlitzer 4027
organ. I'm pretty sure the bridge rectifier filter electrolytic
caps are aged to the point at which they don't filter so well
anymore. The power supply uses 4 inch tall multi-capacitor cans
mounted on the PS chassis with pins in the chassis and the cans
external to the chassis. All caps are employed for a total of 10
caps in three metal can packages. Are these antique parts even
available in new, recently manufactured form anymore? If so,
where?</p>
<p>There are three cans comprised of:</p>
<ol>
<li>500uF/25V x 2, 500uF/35V, and 1000uF/25V (4 caps)<br>
</li>
<li>1000uF/25V x 2 and 5000uF/25V (3 caps)<br>
</li>
<li>3500uF/25V and 1000 uF/25V x 2 (3 caps)<br>
</li>
</ol>
<p>Ideally, using exact replacement of new parts would be best
(and maybe costly, I fear). Non-ideally, I could wire new single
cap electrolytics but that would end up looking like a
frankenstein fix (probably work but bulky). Furthest from ideal
is buy a new current technology PS and use diodes or something
to drop the highest voltage to obtain the multitude of lower
voltages (22.5V --> 20.0V, 19.9V, 19.5V, 17V, and 10V). That
might solve the problem but any engineering miscalculation could
fry other parts of the organ.</p>
<p>Another question: There is a 0.01uF/1400V cap across the PS
transformer primary coil. What is the function of that cap?</p>
<p>Thanks, John Speth</p>
<p><br>
</p>
<br>
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