Effectively linear amplifiers, class AB2, one 300W and one 500W dc
input with very low output impedance. The antenna current difference
is less than 5% so the expense of a new PSU, case and so on is so
far wasted. Matching for the 500W is awkward as the transformer
primary for the 500W may need the odd half-turn which is difficult
with a toroid.
I can't send on Opera & WSPR consecutively without some delay to
reset the COM1 port.
Anyway I'm happy to monitor both simultaneously by request or if
there's anyone on. QRSS at the same time is not yet possible because
I only have COM 1 available and Spectrum Lab doesn't like sharing.
What's your setup?
Hugh, M0DSZ
On 27/07/2016 22:22, Graham wrote:
Just spotted you on the psk-map Hugh
There's a square law , to the current , doubling the
power , gives a fractional increase .. but still + 4 dB over
the decoder limit , ~ + 9 over the dynamic detector
What are you running, what's the set up ?
73-G,
Sent: Tuesday, July 26, 2016 11:27 AM
Subject: Re: LF: From M0DSZ by M0DSZ Loc IO82LS
0.136 MHz (2200m), OPERA, -36dB
I'm pleased someone was monitoring, I suspect conditions were not
too good. This is a new linear amplifier but, in spite of having
more input power, doesn't produce much more antenna current.
Hugh, M0DSZ
On 25/07/2016 19:48, Graham wrote:
One ping this afternoon
Rx at Mon, 25 Jul 2016
16:17:22 GMT
From M0DSZ by PA7EY Loc JO22JJ
Frequency: 0.136 MHz
(2200m), OPERA, -36dB
Distance: 530 km
bearing 91°
Using: Opera
v1.5.7/Rptr V1.6
Antenna: RX Op32
73,G
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