LF: Re: Re: NF MF

To:	<[email protected]>
Subject:	LF: Re: Re: NF MF
From:	"mal hamilton" <[email protected]>
Date:	Fri, 22 Jun 2012 14:39:38 -0000
References:	<001b01cd505a$d79cd230$0401a8c0@xphd97xgq27nyf> <EF37647289B94BC1BF6B0595E57BFB4E@TraceyPC>
Reply-to:	[email protected]
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Tracy

25 dB gain increase across spectrum 470 - 500 Khz. Just checking antenna gain across band of interest and not a scientific measurement. Signal over noise also looks good on beacon SA with 1 Khz selectivity, and can go down to 25 hertz if necessary.

Just looked at it again and it is the same except now geting hit by static crashes.

mal/g3kev

----- Original Message -----

From: Tracey Gardner

To: [email protected]

Sent: Friday, June 22, 2012 1:24 PM

Subject: LF: Re: NF MF

Hello Mal

You don't quote the all important, the bandwidth that you were taking these measurements in.

I've just done a quick look on my receiver.

20kHz DDC bandwidth and 10Hz selectivity

Noise floor with no antenna < -150dBm

Noise floor with Beverage antenna connected < -140dBm

73s Tracey

----- Original Message -----

From: mal hamilton

To: rsgb

Cc: [email protected]

Sent: Friday, June 22, 2012 10:38 AM

Subject: LF: NF MF

MF

Experiment this morning on 475 Khz band.

Flex 3000 SDR rx on 475 Khz.

Noise floor - no antenna -----with 10dB attenuation inserted-------------120dB

Antenna 1/4 wave inv L connected 95dB therefore a gain of 25 dB

Time 0900 utc ----daytime Band quiet no static -- typical radio environment at this QTH

I must do this check after dark

g3kev

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