I use a piece of software called Test Tone Generator to pulse tune my amp.
It is set for 200Hz for one pulse tone, and 600Hz for the other. I have the
duty cycle for each tone set for 30%, which seems to work very well given I
operate SSB. It seems to me that it would be a more efficient tune if you
can mimic the mode of operation you plan on using when tuning your amp.
73,
Mike
W5CUL
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of David C. Hallam
Sent: Thursday, September 23, 2010 7:13 AM
To: Alek Petkovic
Cc: amps@contesting.com
Subject: Re: [Amps] Pulse tuning
What about pulse tuning using a two tone signal?
David
KW4DH
On 9/23/2010 7:58 AM, Alek Petkovic wrote:
> At 07:22 PM 23/09/2010, Bill, W6WRT wrote:
>> ORIGINAL MESSAGE:
>>
>> On Thu, 23 Sep 2010 03:57:11 -0500, donroden@hiwaay.net wrote:
>>
>>> If you have to pulse, you are relying too much on power supply
capacitors.
>>> Just build it "large" and don't worry about pulsing.
>>> Don WA4NPL
>> REPLY:
>>
>> I agree. If you HAVE to pulse to avoid damage, you amp is running on the
>> edge of self-destruction anyway. Beef it up so it can run full carrier
>> for at least five minutes at a time with no sweat. Then you can tune it
>> up the 'right' way.
>>
>> Bill, W6WRT
>
>
>
> Surely, with pulse tuning, you are getting the duty cycle as close as
> possible to ssb conditions. Therefore you are tuning your amplifier
> to the absolute optimum level.
>
> When you tune with full carrier, power supply sag come into play in a
> big way and so, once you have tuned your amp under constant carrier
> conditions, it will be less than optimum for ssb operation.
>
> Tell me if I'm barking up the wrong tree but I see pulse tuning as
> the obvious way to go.
>
> 73, Alek.
> VK6APK
>
>
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>
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