[AMPS] Re: Average Plate Diss ?????

[measures]

>
>
>Jon Ogden wrote:
>
>> Jim Thomson wrote:
>>
>> >> > The idling
>> >> >power throws a wrench ito your simplistic peak diss x duty cycle theory.
>> >> >
>> >> €  Not for those who do not use Lock to Talk.
>> >
>> >****** Some fellows can't run Vox. I have friends who have noisy young 
kids,
>> >barking dogs etc, that would wreak havoc on band. Vox would get tripped 
>while
>> >switching ants, etc.  Some just prefer ptt/footswitch.  All the ops at 
>VE7ZZZ
>> >MM contest stn use footswitches. They are actually faster than vox, if u 
>know
>> >what u are doing.
>>
>> Rich belives everyone should operate like he does.
>>
>
>#####  The next guy who asks me abt 4-1000's in gg, will be told to get a 
>8160 for>full suds.

€  8160 good.   drive it with a SB-220, 8kv at 5a.  .  Makes way more 
sense than a 3cx3000a7.  Good handles too.  

......
>Rich, re dentron L loading, u state if amp is tuned to 800Ma of plate I, 
>that on ssb, meter will bounce up to only 300Ma??  

€  look at the peak current from an anode supply with an oscilloscope and 
you will see that meters show only about 1/3 of the real current on SSB.  
Mo' mic. gain is not necessarily mo' betta.  .   

>I tune my L4B to 800 Ma. Book 
>sez it should kick up to 400Ma (no clipping)    With clipping, it kicks up to 
600 
>Ma.  

€  I know a guy who tunes his SB-200 at 450mA.  He talks it up to 500mA 
when he's chasing DX.  . 

>
>It helps meter out if the starting point is 240-260Ma !  

€  Eimac recommends 75mA per tube ZSAC.  .  

> Throw in some meter
>overshoot to boot. How u ever got 14kw out of a 8171 with just a simple 
>65lb Dahl Hypersil xfmr is beyond me?  

€  it's spelt Hipersil.  The transformer had a 0.079-ohm 240v primary.  
After I installed the #4 Cu wire to the breaker box, there was little 
sag.  On an "ahhhh",  anode V was just under 8k.   .  The 8171 cathode is 
capable of 12a of peak emission, so there is plenty.    
 

>You must be assuming ssb with no clipping, 

€   no clipping and minimal mic. gain.  "Speak softly and carry a big 
stick".  -  TR.  It is my opinion that CB-style operation may be ok on 
Channel 6, but it doeth sucketh on a ham band.  .  When I hear a guy with 
wacko-banana processing, it tells me that he has an inadequate amplifier. 
 

>and alc meter bouncing 1/16" every 4 secs.  Ever operated the CQ WW ?   

€  no.  Using a tetrode with handles during a contest is not kosher.   

>Fellows were
>burning up stock SB-220 xfmrs back in 74. Back then, the replacement cost was
>$35.00 !

€  And the SB-220. was producing less PEP because of  CB-style operation. 
 
>
>-BTW, I tried out some footswitch operation,much faster rls than vox. If u 
>set up vox delay for that fast a rls,it would be dropping out between 
syllables. 

€  Dropping out between syllables is too fast for me.  At a minimum, I 
adjust the vox to drop between sentences.   With the exception of 
emergencies, I do not continue to converse with anyone who does not pause 
between sentences.  My pet peeve is a guy who asks me a question, does 
not pause, and goes into a monologue.  ..  


cheers, .Jim

-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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