Yes , Thanks to those who tuned in for you !
As usual no decodes at this qth , but this time the reason is not
quite as obvious in the past as the local noise level has dropped,
if g3xdv is running later , Im sure you will decode ,
Well for Opera tx/rx , stability requirements are only +/- 1 hz
over the 32 mins , but its possible that higher stability will
lower the min s/n level but only fractionally, the system is
designed to use 'normal' radio equipment ! Frequency setting accuracy is
also not a problem as long as the signal falls inside the 100 Hz pass
band , may be 1 hz clear each side is enough for a decode !
These represent the minimum decode level for OP32
23:59 136 VO1NA de F4DTL Op32 -40 dB in Paris France
23:59 136 VO1NA de W1TAG Op32 -41 dB in Raymond, ME
Terry's 01:39 136 VO1NA Op32 -25 dB is some 15 dB over the level
, so what ever the power was , its was eventually 15 dB in hand !
73 All - G..
--------------------------------------------------
From: <[email protected]>
Sent: Sunday, September 02, 2012 11:12 PM
To: <[email protected]>
Subject: Re: LF: VO1NA
Dear Group,
Thank-you to all who provided reports: GW0EZY, F1DTL, W1TAG, G4WGT
and DF6NM to whom I apologise for not having phase coherent keying!
I will give this some thought, along with Grahams suggestion to
try the pencil method of lowering the QRG. Perhaps it might be best to
keep searching for a caesium standard to use with a synthesiser.
The present reference is an OCXO at 13.7770 MHz which was last calibrated
against the LORAN sidebands.
Some RX antenna work was completed today so the RX will be on for OPERA32
on 136.00 kHz.
73 and thanks again.
Joe VO1NA
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