I had this problem when a crystal filter on the back was not making a good 
connection with one of the pins. Wiggle each filter. The static crashes would 
occur out of nowhere and last a few seconds. Took me weeks to find it.

73,
Bob WW3QB



--- On Sat, 7/31/10, K4GM- George <[email protected]> wrote:

> From: K4GM- George <[email protected]>
> Subject: [Drakelist] R4C static after Sherwood 3d mixer mod
> To: [email protected]
> Date: Saturday, July 31, 2010, 8:06 AM
> I have obtained an R4C with many of
> the Sherwood mods installed including the solid state 3d
> mixer which is supposed to eliminate the dreaded frying
> crackle.   Unfortunately occasionally I hear
> a bit of static sounding to me like what a brief solar flare
> might sound. It is not really a hiss but more like a strong
> static crash.  It is definitely not simply QRN! 
> It is infrequent and I can still copy over it.  Before
> I open it up and start reviewing the wiring on the mixer
> mod, has anyone else had experience with this type of
> problem?  Is there a known culprit such as one of the
> tubes going bad??  Any and all suggestions appreciated.
> 
> George K4GM
> 
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