100uF Motor Run Caps

i45one · 4th November 2009, 01:13 AM

I am starting to source parts for my 1st tube amp project. I am looking to construct Porkchop's KT88 se circuit.

Does anyone know where I can find a suitable 100uF motor run cap? It seems as though no one really carries anything that large in the voltage required. Angela carries 50uF, but I would rather not have to parallel two caps if I can help it.

Are there any other alternatives?

Thanks!

88man · 4th November 2009, 02:16 AM

I haven't found any 100uF motor run caps myself, as the largest one I've seen is 60uF. I am building Abdellah/Alexg/Porkchop's SE KT88 too - I am paralleling (2) 50uF caps for my project. Great selection and prices at Alliedelectronics.com.

pjanda1 · 4th November 2009, 03:39 AM

Ebay often has cheap big 'uns. There was one seller in particular, but I can't remember who. These guys have some large fellas as well. Don't forget that you can multiple that AC voltage by 1.4 or so for your purposes.

Paul
Wild Burro Audio Labs - DIY Full Range Speakers

rdf · 4th November 2009, 04:33 AM

Some are still available on Ebay. Check out local electrical suppliers to the HVAC industry first.

kevinkr · 04:50 AM

midori meadows on eBay used to carry 100uF motor runs, but ran out a while ago, and I have not checked to see whether or not they have restocked.

Edit: Link here to eBay profile: http://myworld.ebay.com/midorimeadowsllc/

Note that she currently is offering 80uF/500VAC motor runs by Eyuda for $13 each...

I've done business with her, and have recommended her as a source of motor runs to a number of friends over the last few years.

tomtt · 04:44 AM

heating and cooling shops might have used ones.

alexg · 4th November 2009, 09:26 AM

I find that the ASC, Aerovox and the GE motor run capacitors sounds excellent on my PSUs.

I usually parallel a couple of 45 or 50uf, to get the capacitance that I need.

i45one · 4th November 2009, 12:39 PM

Thanks for all the input! I look forward to working on this project. It's refreshing to know that there are great folks around willing to help as this is my first tube build. I'm sure I will have tons more questions before it is through.

piero7 · 4th November 2009, 01:05 PM

MKP caps: CLICK ME

Geek · 4th November 2009, 10:50 PM

Quote:

Originally Posted by piero7

MKP caps: CLICK ME

I wonder if it's inductively wound though....

Cheers!

4th November 2009, 01:13 AM	#1
i45one diyAudio Member Join Date: Oct 2008	100uF Motor Run Caps I am starting to source parts for my 1st tube amp project. I am looking to construct Porkchop's KT88 se circuit. Does anyone know where I can find a suitable 100uF motor run cap? It seems as though no one really carries anything that large in the voltage required. Angela carries 50uF, but I would rather not have to parallel two caps if I can help it. Are there any other alternatives? Thanks!

4th November 2009, 04:33 AM	#4
rdf diyAudio Member Join Date: Jun 2004 Location: the thermionic past	Some are still available on Ebay. Check out local electrical suppliers to the HVAC industry first. __________________ Blame the Manichaeists

4th November 2009, 04:40 AM	#5
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	midori meadows on eBay used to carry 100uF motor runs, but ran out a while ago, and I have not checked to see whether or not they have restocked. Edit: Link here to eBay profile: http://myworld.ebay.com/midorimeadowsllc/ Note that she currently is offering 80uF/500VAC motor runs by Eyuda for $13 each... I've done business with her, and have recommended her as a source of motor runs to a number of friends over the last few years. __________________ www.kta-hifi.net Last edited by kevinkr; 4th November 2009 at 04:50 AM.

4th November 2009, 04:44 AM	#6
tomtt diyAudio Member Join Date: Aug 2002 Location: kansas city mo, and on occasion, around the world ... Blog Entries: 15	heating and cooling shops might have used ones. Last edited by tomtt; 4th November 2009 at 04:44 AM. Reason: 63

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4th November 2009, 02:16 AM	#2
88man diyAudio Member Join Date: Aug 2009 Location: Boston	I haven't found any 100uF motor run caps myself, as the largest one I've seen is 60uF. I am building Abdellah/Alexg/Porkchop's SE KT88 too - I am paralleling (2) 50uF caps for my project. Great selection and prices at Alliedelectronics.com.

4th November 2009, 03:39 AM	#3
pjanda1 diyAudio Member Join Date: Jan 2005 Location: The Nebraska Panhandle	Ebay often has cheap big 'uns. There was one seller in particular, but I can't remember who. These guys have some large fellas as well. Don't forget that you can multiple that AC voltage by 1.4 or so for your purposes. Paul Wild Burro Audio Labs - DIY Full Range Speakers

4th November 2009, 09:26 AM	#7
alexg diyAudio Member Join Date: Jan 2005 Location: Philippines	I find that the ASC, Aerovox and the GE motor run capacitors sounds excellent on my PSUs. I usually parallel a couple of 45 or 50uf, to get the capacitance that I need.

4th November 2009, 12:39 PM	#8
i45one diyAudio Member Join Date: Oct 2008	Thanks for all the input! I look forward to working on this project. It's refreshing to know that there are great folks around willing to help as this is my first tube build. I'm sure I will have tons more questions before it is through.

4th November 2009, 01:05 PM	#9
piero7 diyAudio Member Join Date: Apr 2009 Location: Matera	MKP caps: CLICK ME

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