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Re: LF: DK7FC in OP8 on LF, summary

To: <[email protected]>
Subject: Re: LF: DK7FC in OP8 on LF, summary
From: "Graham" <[email protected]>
Date: Fri, 20 Jul 2012 17:49:17 +0100
Importance: Normal
In-reply-to: <[email protected]>
References: <CAK59VFM1L3_89dRpDVrRzyuGi63LuM0Y5KRzJ9DpB9-EWs5m8Q@mail.gmail.com> <[email protected]>
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Thanks' Stefan

Quite interesting , especially the day light decode with TF3HZ and later 4X1RF , decoding at the limit of the OP8 speed

Nothing showing from the USA , but may be next time under better condx , also Joe vo1na may of managed a decdoe , as he did Gary , running 300 watts to a 35 ft top loaded vertical , using OP8 last winter , but would of needed some warning of the event.

-4 Into Moscow ,is a outstanding level , with that level at 2000 miles , how many hops to the lower limit of OP32 -39 dB or OP64 -42 dB ... one for Alan !

05:08    136 RN3AGC de RN3AUS Op8  -4 dB in nr Moscow


As Mike , suggested , a similar test with OP32 , -6 db lower , would be a good comparison , there is actually no limit to the time that the OP system can be configured to run, the longest is 4 Hours , OP4H for the 8Khz audio band , but once again, its data a mode and not 'just' a single carrier, so still falls short at -50 db s/n .. but if there was a station with a 'long' Ae ?

BUT The big question is , What can you transmit ? I assume the amplifier is class d/e ...

Are you able to translate a audio based data mode to 136, the opera data mode is designed to allow access to data/beacon with simple CW transmitter and is not as efficient as mfsk or phase modulated system ...

Tnx -73 -G.


--------------------------------------------------
From: "Stefan Schäfer" <[email protected]>
Sent: Friday, July 20, 2012 1:51 PM
To: <[email protected]>
Subject: LF: DK7FC in OP8 on LF, summary

Hello LF!

Thanks to all listening stations for the reports of the yesterdays OP8
orgy on LF! I must admit that it was an interesting
afternoon/evening/night/morning.

Out of 733 reports, here is a summary of the best reports i got from the
25 stations.

Vy 73, Stefan/DK7FC



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