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Re: LF: From M0DSZ by M0DSZ Loc IO82LS 0.136 MHz (2200m), OPERA, -36d

To: [email protected]
Subject: Re: LF: From M0DSZ by M0DSZ Loc IO82LS 0.136 MHz (2200m), OPERA, -36dB
From: LineOne <[email protected]>
Date: Thu, 28 Jul 2016 11:52:21 +0100
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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,

From: LineOne
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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