[R-390] Orange Drop vs ceramic disc

[Ben Loper]

A local parts store has ceramic disc capacitors and I could get just about
any voltage and capacitance I wanted.  I don't know the age so I guess I
would call them NOS, if they don't age or fail with age it would be easier
for me to get them here.  They also have NOS resistors but I've heard they
do change value with age.

On Wed, Mar 30, 2011 at 10:37 AM, Shoppa, Tim <tshoppa at wmata.com> wrote:

> Orange drops are capable of handling very high pulse currents. This is
> important in snubbers in power equipment etc. Note that this is what Sprague
> sells them for. There will be few places in a radio where this
> characteristic is needed.
>
> Ceramic discs with wire leads are still available and have superior HF
> characteristics (lower inductance) and will be superior in most all bypass
> applications. Audio applications, ceramics are not so clearly a win.
>
> Note that many lines of leaded ceramic discs are being phased out in favor
> of surface mount components. I'm not pronouncing that the leaded parts are
> disappearing, I'm sure they'll be around for another century, but realize
> that 90% + of current production needs are surface mount. Surface mount
> ceramics also have impressively low lead inductances important for many
> applications today.
> ________________________________________
> From: r-390-bounces at mailman.qth.net [r-390-bounces at mailman.qth.net] On
> Behalf Of Ben Loper [brloper at gmail.com]
> Sent: Wednesday, March 30, 2011 11:26 AM
> To: r-390 at mailman.qth.net
> Subject: [R-390] Orange Drop vs ceramic disc
>
>  I'm working on a radio and now need to buy some capacitors.  My
> understanding is that the old round flat ceramic disc don't age.  Any
> opinions either way on Orange drops vs  ceramic disc.
>
> --
>
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“Earth provides enough for every man's need, but not every man's need"