aS I RECALL, THE6146 WAS RATED AT ABOUT 90 WATTS WHICH WOULD GIVE YOU APROX
45 WATS OUTPUT RUNNING CLASS b.
I HAD A dx 100 AND IT RAN TWO TUBES AND THEY SAID IT WAS 180 WATTS INPUT
POWER WHICH NOW THE RATEINGS ARE MEASURED IN OUTPUT POWER INSTEAD OF INPUT.
73NOWEd K7UC
--------------------------------------------------
From: "Butch Bussen" <[log in to unmask]>
Sent: Wednesday, June 06, 2012 6:46 AM
To: <[log in to unmask]>
Subject: Re: Plate dissipation VS output power
> Yep, you are right. way back when, we use to rate rigs on input power.
> I had an af 67 which ran one 6146 and on am it was rated 600 watts
> input. I don't know what the output was, didn't have a way to measure
> it. I never checked swr either.
> 73
> Butch
> WA0VJR
> Node 3148
> Wallace, ks.
>
>
> On Wed, 6 Jun 2012, Lloyd Rasmussen
> wrote:
>
>> It will depend on whether those final amplifier tubes are running in
>> Class
>> AB1, AB2, or B. This depends on the idling plate current vs. the
>> key-down
>> plate current. Higher efficiency (lower idling current, operating the
>> tubes
>> closer to cut-off) increases the distortion of your signal, which is
>> unimportant for CW but quite important for SSB. I would guess that you
>> are
>> talking 50 percent efficiency (ratio of power output to power input).
>> Not
>> all of the enpower is lost in the tubes, though. A little of it is also
>> lost in the pi network output circuit. I would probably adjust the plate
>> tuning and loading controls for maximum power output and leave it at
>> that.
>> I assume you're not trying to run this station remotely.
>>
>> Lloyd Rasmussen, Kensington, Maryland
>> Home: http://lras.home.sprynet.com
>> Work: http://www.loc.gov/nls
>>
>>> -----Original Message-----
>>> From: For blind ham radio operators
>>> [mailto:[log in to unmask]]
>>> On Behalf Of Michael Ryan
>>> Sent: Wednesday, June 06, 2012 6:44 AM
>>> To: [log in to unmask]
>>> Subject: Plate dissipation VS output power
>>>
>>> Hi all:
>>>
>>> Is a rule of thumb to compare plate dissipation to actual output power?
>>> IE: My FT-102's 3 6146s can safely dissipate 105W between the 3, 200w
>>> out
>>> on SSB and 160 CW. So if I'm running my max CW, whats the plate
>>> dissipation of the tubes?
>>>
>>> TNX & 73:
>>> Michael De VO1AX
>>>
>>> Sent from my iPhone
>>
>>
|
