Joe,what was the filament voltage with that kind of line input? Excessive
filament voltage allows more than normal emission with thoriated tungsten
fils...At least for a while! 73, Jim K7RDX..
----- Original Message -----
From: "Joe Isabella" <n3ji@yahoo.com>
To: "Amps" <amps@contesting.com>
Sent: Monday, July 17, 2006 11:21 AM
Subject: Re: [Amps] output of SB220 typical TSPA
> I was getting approximately 1100-1400W PEP on SSB out of my TL-922
(depending on band) with fresh 3-500ZGs and 245V+ line V with 100W drive,
FWIW.
>
> Joe, N3JI
>
>
> ----- Original Message ----
> From: Will Matney <craxd1@verizon.net>
> To: jtml@lanl.gov; amps@contesting.com
> Sent: Monday, July 17, 2006 12:40:45 PM
> Subject: Re: [Amps] output of SB220 typical TSPA
>
>
> John,
>
> I don't think line voltage would amount to much, maybe 50-60 VDC more if
there was a 5 VAC raise on the
> line. I don't think that's enough to get 200 more watts. My guess is the
wattmeters some use are a little loose.
> I've seen this many times where they were off this much.
>
> Best,
>
> Will
>
> *********** REPLY SEPARATOR ***********
>
> On 7/17/06 at 11:12 AM John T. M. Lyles wrote:
>
> >>I've never seen a pair of 3-500Z's driven with 100 watts
> >>produce 1500W PEP ***on an accurate power meter*** with only
> >>3000V on the anode.
> >
> >>
> >>All of my SB220's, even with the grids grounded, only make
> >>around 1200-1300 with100W drive on a known accuracy meter.
> >
> >I concur with W8JI here, as I have never seen more than 1300 watts
> >from my SB220 using a Bird 43 and a peak reading modification to it,
> >with my IC735 flat out at 100 Watts of drive. Maybe some people have
> >high line voltage and get more? Or are measuring into a non-flat load
> >(reactive)?
> >
> >73
> >John
> >K5PRO
> >_______________________________________________
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>
>
>
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