[600MRG] Capacitors

[Frank Lotito]

Where do you get small quantities of ATC capacitors?  My experience is they are not easy to find when you are paralleling units to build up to the values needed for Low-Z below the broadcast band filters.  Besides they are quite expensive.  I've had better luck purchasing  Wima and Vishay film type pulse application capacitors from the usual sources (DigiKey / Mouser).  These suppliers  are willing to sell you small quantities.  Any thoughts on paralleling units to minimize ESR of the paralleled stack?  

73 Frank Lotito  K3DZ / WH2XHA (for the time being)
________________________________________
From: 600MRG <600mrg-bounces at w7ekb.com> on behalf of Marshall Cross <mcross at megawave.com>
Sent: Thursday, October 5, 2017 1:35 PM
To: Larry; 600 MRG
Subject: Re: [600MRG] Capacitors

Larry, look up ATC (Advanced Technical Ceramics)  on Long Island, NY. This is where we get our high-current, low-loss caps. 73, Marshall, W1HK

-----Original Message-----
From: 600MRG [mailto:600mrg-bounces at w7ekb.com] On Behalf Of Larry
Sent: Thursday, October 05, 2017 1:06 PM
To: 600 MRG
Subject: [600MRG] Capacitors

While trying to build good bandpass filters for our favorite frequencies, I've had a great deal of difficulty finding capacitors that are good enough. C values in the range of 0.0047 to 0.1 uF are required for most of these filters. All of the capacitors I have on hand in this value range seem to be extremely low Q, very high ESR.

Does anyone know of a source of known good capacitors in this range?
I've looked at some WIMA and Kemet pulse rated caps and while they seem to be better than most, they are still not good enough to build bandpass filters with.

Thanks & 73,

Larry - W7IUV / WH2XGP

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