-----
Original Message -----
Sent:
Monday, August 08, 2011 11:49 PM
Subject:
Re: LF: 137 ck
That's the problem with
modern digital technology , the dynamic range exceeds , that of
the MK-1 eye ball , 30 db is 1000:1 , will show at 20 db over
the noise and would not show on the scope
Use a reasonable decoupling
capacitor , and look at the psu voltage using a (cheap) sound
card (with high z resistive ladder for safety) ..use Wolf's
SPEC-LAB to view the dB attenuation at 50, 100, 150 , 200 Hz
etc
Depending on the loop
bandwidth of the stabiliser , keying may also induce transits ,
use the peak hold to observe the generated spectrum
G..
Sent: Monday, August 08, 2011 8:29 PM
Subject: Re: LF: 137 ck
No hum Gary
I am monitoring on the scope and sig is vy
clean
mal/g3kev
-----
Original Message -----
Sent:
Monday, August 08, 2011 8:19 PM
Subject:
Re: LF: 137 ck
OK Mal,
Captures are at 10 minute intervals, but I have saved you
going to SpecSavers as I have enlarged the frequency readout.
BTW...do you have some 100Hz hum on your transmission, look
at my grabber to check.
73
Gary - G4WGT.
On 8 August 2011 19:28, mal hamilton
<[email protected]>
wrote:
Yes Gary
Your grabber seems to have a long delay
before display es the times and freq hard to read
otherwise sensitivity seems ok at
present for distance
73 de mal/g3kev
-----
Original Message -----
Sent:
Monday, August 08, 2011 7:21 PM
Subject:
Re: LF: 137 ck
Mal,
You wrote.........While
testing earlier find NO UK GRABBERS working
My 500kHz & 137kHz grabber runs
24/7....
Gary - G4WGT.
On 8 August 2011 18:33, mal hamilton
<[email protected]>
wrote:
Just finished my new PSU 60V/10A
psu. While testing earlier find NO UK GRABBERS working and DK7FC has a
SPURIOUS wobble signal right on 137.7
I will be QRV for a while from now
on 137.7 qrs3 for DX qso's and will work locals on CW
73 De Mal/G3KEV
