Hi Bill,
Please refer to the Quick-Start Guide to Q65:
"Recommended submodes: ...
• Ionospheric scatter on 50 MHz: 30A
• QRP ionospheric scatter on 50 MHz: 120E
• Ionospheric scatter on 144 MHz: 60C
• Troposcatter and rainscatter at 10 GHz: 60D
• Small-dish EME, 10 and 24 GHz: 120E
• Other EME: 50, 144 MHz 60A; 432 MHz 60B; 1296 MHz: 60C; 10 GHz: 60D"
-- Joe, K1JT
On 2/3/2021 6:34 PM, Bill Barrett wrote:
Just made a contact with W4TAA, a local, using 30 second T/R sequencing.
What is the recommended T/R sequence timing for Q65 on 6M terrestrial
ionoscatter?
Thanks;
Bill W2PKY
On Wed, Feb 3, 2021 at 5:00 PM Reino Talarmo <reino.tala...@kolumbus.fi
<mailto:reino.tala...@kolumbus.fi>> wrote:
Hi Mike,____
Please don’t mix AM at all with e.g. Q65 that are using
frequency-shift keying and don’t have any amplitude modulation. In
most rigs the 25 W versus 100 W is due to keep amplitude modulation
in PA linear range. As such it is not due to possible high
temperature rise.
Your 25 W rule is on safe side for 300 s Q65 as it starts to be same
as continuous transmission in most rigs. ____
73, Reino OH3mA____
__ __
*From:*Black Michael via wsjt-devel
[mailto:wsjt-devel@lists.sourceforge.net
<mailto:wsjt-devel@lists.sourceforge.net>]
*Sent:* 3. helmikuuta 2021 23:28
*To:* wsjt-devel@lists.sourceforge.net
<mailto:wsjt-devel@lists.sourceforge.net>
*Cc:* Black Michael <mdblac...@yahoo.com <mailto:mdblac...@yahoo.com>>
*Subject:* Re: [wsjt-devel] 2.4.0 RC1 - Decodes show no callsign____
__ __
I will add that many operators aren't aware that their rig can't do
full power on all modes.____
__ __
Many rigs rated at 100W can only do 25W in AM mode (100% duty cycle)
-- the manuals do show this.____
__ __
For those rigs I always recommend to the ops to run FT8 at 50W max
to avoid pushing the temperature on their rig's finals.____
__ __
So a 300 seconds Q65 would definitely be 100% duty cycle and a max
of 25W or whatever your manual says is the AM maximum power level.____
__ __
Mike W9MDB____
__ __
__ __
__ __
__ __
On Wednesday, February 3, 2021, 03:20:48 PM CST, Bill Somerville
<g4...@classdesign.com <mailto:g4...@classdesign.com>> wrote: ____
__ __
__ __
On 03/02/2021 21:02, Edfel Rivera wrote:
> Hi:
> Please see attachment. Seems to be decoding or the functionality is
> correct. Also, what TX power could be used? As TX intervals increase,
> Could that cause damage to rig terminals? Thinking of JT65 where TX
> power < ~30watts.
>
> BTW, Thank you very much for INNOVATION. Seems like another fantastic
> mode.
>
> 73'
>
> Edfel
> KP4AJ
Hi Edfel,
the lines in the Single-Period Decodes window without decodes indicate
the best, but not decodable, candidate signal within the current
frequency tolerance window. They may provide indication that a station
is transmitting.
As for Tx power, nothing new there, use whatever is needed to make the
QSO and not more. That could be 1500 W or 1 pW depending on the band,
path, and conditions. For EME and VHF weak signal modes like
ionoscatter
a few hundred watts may be necessary. Like JT65 Q65 is 100% duty cycle
and the same considerations for PA current and temperature should be
observed as would be for any other 100% duty cycle mode like FM.
73
Bill
G4WJS.____
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--
Bill Barrett
352-437-4758
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