Many low priced aluminum electrolytics have a lot more series resistance
than a quality tantalum. Many I fail fresh from the distributor when I
check them for power factor, the capacitance bridge's measure of series
resistance. Small electrolytics that are a few years old are even worse.
Changing from a 33 to a 22 mf should slightly shorten the time constant,
but likely the lower series resistance of the tantalum damps the AGC
loop better to prevent pumping.
73, Jerry, K0CQ
On 11/8/2010 8:35 PM, scott sheppard wrote:
I have recently recieved my new to me Argosy. In one of the many mods
I note it suggests replacing a 33uF elec cap with a 22uF Tantalum
cap. This is to help reduce the AGC pumping action. For fun I
replaced the cap with a regular 22uF cap which had no real effect.
Would a tantalum make that much difference? Has anyone done this?
cheers
scott VA3IED _______________________________________________ TenTec
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