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Re: LF: Miniwhip and Intermod

To: [email protected], [email protected]
Subject: Re: LF: Miniwhip and Intermod
From: [email protected] (Warren K2ORS/WD2XGJ)
Date: Sun, 09 Apr 2006 20:00:54 +0000
Cc: Joe Craig <[email protected]>
Delivered-to: [email protected]
Reply-to: [email protected]
Sender: [email protected]

     I spoke to Ted Holdahl KC3OL the other day, he added a 100uH choke in 
series with the output of the Miniwhip amplifier. This greatly knocked down AM 
MW signals - perhaps that would help in your case (if the intermod is due to 

73 Warren K2ORS/WD2XGJ

 -------------- Original message ----------------------
From: Joe Craig <[email protected]>
> Dear Group,
> I recently built Roelof's miniwhip e-probe and reported on
> the reflector that there was trouble with intermod when
> close to MF AM transmitter sites.  This problem originates
> with the receiver and not the probe itself.
> This was verified by attenuating the output of the probe
> and hearing signals on 137 kHz what could not be heard
> without the attenuator because of interference.
> Thanks to Roelof for a good design and sharing it those who
> asked and his tip about the attenuator!  Thanks also to the
> kind VE3 who sent me the semiconductors I was having trouble
> locating whin building the PA0RTD miniwhip.
> Still QRV on 137.777 kHz sending 'N' at QRSS60 after sunset.
> 73
> Joe VO1NA

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