[AZ-Observing] Re: Need a pointer please

1.5uF tantalum is a standard value.  They're all over the place - including 
eBay.  Lacking a local source, and if you're only trying the circuit out before 
committing, two 3.3uF caps in series would get you close.  Or you could source 
a trim cap and tune your circuit.   For a dew heater, such precision is not 
needed.
 
Allied, Newark or Sprague direct are good sources.
 
Good luck,
 
Darrell Spencer
________________________________

From: az-observing-bounce@xxxxxxxxxxxxx on behalf of Bob Christ
Sent: Fri 1/23/2009 8:01 AM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Need a pointer please



I have been unsuccessful in my search to buy a 1.5µF 20V Tantalum electrolytic 
capacitor in the Valley.  I have tried the usual suspects (Radio Shack, Fry's) 
to no avail, and my Google searches have not been fruitful.

Does anyone know of a business in the valley that might sell such a component?

The capacitor is a critical part in a PWM (pulse width modulator) circuit that 
I am building to efficiently supply juice to a dew heater strip.  The things we 
do to keep ourselves occupied astronomy wise when the skies are bad.

Thanks.

Bob

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