LF, transmitting now. CW on 136.40kHz.
Quoting Paul-Henrik <[email protected]>:
> LF, Hello all!
>
> I plan to run a test transmission on 136kHz during Friday, Saturday and
> Sunday
> night. The setup is very preliminary/temporary and can not be left unattended
> for longer periods. The unprotected ATU has to be brought indoors when not in
> use. We expect cold dry weather for the weekend so it should survive while in
> use. The estimated ERP based on tests made yesterday is only 20mW. This
> figure
> does not include absorption in nearby objects.
>
> Initially the transmission will be CW only but QRSS3 with CW ID will follow
> as
> soon as I have the ON7YD keyer software and interface set up.
>
> Antenna: Inverted-L 15m high with 35m horizontal wire. 20 radials 5-25m long,
> half of them terminated in 0.5m deep earth rods. Rtot estimated to roughly
> 100ohms.
> ATU: Variometer + large loading coil
> TX: Keyed 1W 50ohm DDS signal generator feeding a pair of parallell 807's in
> class AB1 trough a wideband 1:5 voltage stepup transformer providing 80Vp-p
> for
> the control grids. Classic parallel tuned tank with adjustable coupling coil.
> Power output is measured to 65W at 810V/150mA on the plates.
>
> Unless I receive other suggestions for the QRG that will enable QRM-free QRSS
> reception for interested stations the frequency will be 136.40kHz.
>
> I can not receive on 136kHz during this test. I will inform when QRV/QRT.
>
>
> Best regards
>
> Paul-Henrik / OH1LSQ
> Vaasa / KP03SD
>
>
>
>
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