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| To: | "[email protected]" <[email protected]> |
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| Subject: | Re: LF: Re: beacon on 501.59kc/s USB RX dial - NOW QRT |
| From: | M0FMT <[email protected]> |
| Date: | Sat, 2 Jun 2012 18:41:40 +0100 (BST) |
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Thanks for all the info Graham locally we have Chris G3XIZ on and now me it only leaves Dennis MoJXM who I am sure will get into this, I mailed him today ........... via this medium. The Rig I described it is capable of much higher power (depending upon output FET currently an IR840?) with increase in PA voltage it's currently got 12volts applied. Because I use 7812 voltage regulators for the logic stages they will only stand about 25volts max, with this rig, limits the power to around 30 to 40 Watts O/P. Suppose I could separate the supply to the PA and get a lot more from the device I supose. The output goes straight into the aerial 100mm diameter transformer via a short coax lead then to 2 link turns, then from the "Top" of the
transformer to the up lead which goes through teflon insulating washers throught the wall and straight up to the 8inch ribbed glass insulator about 35 feet then on a slope to a 24foot mast (soon to increased to 35feet). Tuned against several long earthing wires. 73 es GL Pete M0FMT IO91UX From: Graham <[email protected]> To: [email protected] Sent: Saturday, 2 June 2012, 17:19 Subject: Re: LF: Re: beacon on 501.59kc/s USB RX dial Ok Pete,
These are all the decodes I have , I was using the
Skanti r5003 Rx with 40 ft alloy
scaffold pole vertical , no atu , only
the pre-selector in the rx , fed vis abt 90 feet
of rg213 coax
Good signal for 10 watts , just on the
edge for the qso mode , at -20 dB minimum ,
but 15 watts would do the job !
As I say its the only plug-and-play
data mode , just plug in place of the CW key ( the
development was based on the racal ma1723 ,
in CW mode at 20 wpm as the maximum
keying speed and envelope shape)
73 -G.
14:00 500 M0FMT Op4 -21 dB
13:39 500 M0FMT Op4 -21 dB
13:26 500 M0FMT Op4 -21 dB
13:19 500 M0FMT Op4 -21 dB
13:13 500 M0FMT Op4 -21 dB
13:07 500 M0FMT Op4 -21 dB
13:02 500 M0FMT Op4 -21 dB
12:57 500 M0FMT Op4 -21 dB
12:50 500 M0FMT Op4 -21 dB
12:43 500 M0FMT Op4 -20 dB
12:38 500 M0FMT Op4 -20 dB
12:34 500 M0FMT Op4 -20 dB
12:14 500 M0FMT Op4 -21 dB
12:02 500 M0FMT Op4 -22 dB 11:54 500 M0FMT Op4 -27 dB From: M0FMT
Sent: Saturday, June 02, 2012 1:59 PM
Subject: Re: LF: Re: beacon on 501.59kc/s USB RX
dial Hi Graham
Yes very pleased with it so far I will change power soon trying to
make up a PWM cct to have a continuously
variable power on the rig (GW3UEP) Class E Fet O/P
stage Gate. PC not crashed .... wait for it! .... for a bit now actually done
nothing to stop it....... weird.
I have only just got my head around opera...... thought it was
a linear mode but this makes sense for LF comms. much
more like a CW transmission which I like.
Thanks for all the info on opera btw.
73 es GL Pete M0FMT IO91UX
From: Graham
<[email protected]> To: [email protected] Sent: Saturday, 2 June 2012, 13:37 Subject: Re: LF: Re: beacon on 501.59kc/s USB RX dial Wow and that was just using the Op
w/fall ! You could reduce to 2 watts
and still decode !
Glad the system is working for you
G..
From: M0FMT
Sent: Saturday, June 02, 2012 1:33 PM
Subject: Re: LF: Re: beacon on 501.59kc/s USB RX
dial Thanks Paul
Graham is right about QRG.
My PC keeps crashing so may go back to QRSS3 using my HB PIC keyer
(not affected by RF) on the same QRG. Thanks fer looking.
73 es GL Pete M0FMT IO91UX
From:
Graham <[email protected]> To: [email protected] Sent: Saturday, 2 June 2012, 13:12 Subject: Re: LF: Re: beacon on 501.59kc/s USB RX dial could be 503.275 ? +/- a
bit !
G.
From: Clemens Paul
Sent: Saturday, June 02, 2012 12:58 PM
Subject: LF: Re: beacon on 501.59kc/s USB RX dial >on 501.59kc/s USB RX dial setting
What is the actual tx qrg then?
Just for exactly looking if the signal is visible at
all.
73
Clemens DL4RAJ
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