----- Original Message -----
From: "Tommy" <aldermant@alltel.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, August 12, 2005 8:17 PM
Subject: Re: [TenTec] Omni VI+ Keying
>I don't have experience with a 'pulser' as I've always found it much
> easier to tune by holding the key down or using the TUNE button.
The TUNE button is easier on the operator, but can be harder on the
PA if it isn't designed for RTTY service. It also keeps my cantenna
dummy load from overheating when testing amplifiers as was the
case this evening when I was trying to check out a Centurion 422 for
a friend of mine :))
> But
> yes, when Ten Tec changed to Logic chip v1.03, supposedly to get rid
> of the mysterious 'micro-chirp', they forgot to inform CW operators
> that with v1.03, the Omni 6 Plus would no longer key much over about
> 40 wpm. So if you bring your 'pulser' down below about 40 wpm, it
> should work. If you want to see your 'pulser' work at 48 wpm, you
> have to change the Logic chip back to v1.02.
>
Yeah, that would make sense. It's clearly not following the pulses
at 48 WPM.
Thanks, Tommy!
73 de Mike, W4EF....................................
> Tommy - W4BQF
>
>
> At Friday 10:52 PM 8/12/2005, you wrote:
>>I just did an interesting experiment comparing my Paragon
>>585 (aka "Paragon 1") to an Omni 6+ that I just picked up
>>on Ebay. When I connect my Inrad Key Pulser
>>( http://www.qth.com/inrad/) to the Paragon, the forward power
>>reading on my Diawa CN-620B wattmeter reads in rough
>>proportion to the duty cycle setting of the Key Pulser (e.g.
>>if the wattmeter reads 100 watts at a Key Pulser duty cycle
>>setting of 100%, it read ~50 watts when the key pulser duty
>>cycle is set to 50%). Thus, using the Key Pulser with the
>>Diawa wattmeter, I can tune my amplifier at a 50% duty
>>cycle and just double the wattmeter reading to get the PEP
>>output level, thus minimizing the wear and tear on the amplifier.
>>
>>When I try doing the proceeding with the Omni 6+, the
>>meter reading at anything less than 100% duty cycle
>>on the Key Pulser is about 10% of the full-scale (e.g.
>>key-down) wattmeter reading. I haven't put the Omni 6+
>>on my O'scope yet, but it sure seems like it is truncating
>>the pulses from the Key Pulser significantly compared to
>>the Paragon. The keying speed of the pulser is 48 WPM
>>with a variably duty cycle (50 msec pulse repetition rate,
>>0 to 100% duty cycle).
>>
>>Anybody have any experience with this?
>>
>>Thanks,
>>
>>Mike, W4EF..........................................
>>_______________________________________________
>>TenTec mailing list
>>TenTec@contesting.com
>>http://lists.contesting.com/mailman/listinfo/tentec
>
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