[Heathkit] HW 16 output

[Michael Waldrop]

Hello Mike and Tom,

The HW-16 is rated between 50 to 90 watts "input" (adjustable).

Measure the final plate voltage and the final plate current at resonance (maximum output). Multiply the plate voltage by the plate current will give you the actual DC input power in the final amplifier. Subtract a minimum of 50% from the input power should give you the average DC output power in CW. I recommend using a 50 ohm dummy load when making these checks.

The schematic shows the final's plate voltage is 700VDC. In order to achieve 90 watts input, the final tube's plate current at maximum output would be 130ma. Using ohm law, multiple the plate voltage by plate current (700 x .130 = 91 watts) input in the final. Subtract a minimum of 50% efficiency in the final should produce a maximum output of 45 watts.  Of course that's if the power supply is capable of producing full output voltage and current at maximum RF output, the tubes are good, and the HW-16 is aligned properly.

I agree with Mike, more than likely someone has mess with the entire alignment which will affect both the transmitter and receiver.

73
Mike
W5RKL
.



--- On Sat, 8/30/08, Mike Goshay <w6we at bak.rr.com> wrote:
From: Mike Goshay <w6we at bak.rr.com>
Subject: Re: [Heathkit] HW 16 output
To: "Tom NØJMY - AAR7FV" <tfarl at mchsi.com>
Cc: Heathkit at mailman.qth.net
Date: Saturday, August 30, 2008, 8:03 PM

Thanks for the input. Yes, I have installed 5 output tubes without meanfull 
change in output into Bird 43 and good Dummy load I will next re install 
other 6cl6's; even though current ones test quite good on my Hickock 
600a.Will investigate B+ as you suggect. I also have a clip on HP ampmeter 
that reads 1 Amp max So between the two I may find that do NOT have as much 
input as they say.  Oh well; This just supposed to be fun anyway.  Mike G 
w6we
----- Original Message ----- 
From: "Tom NØJMY - AAR7FV" <tfarl at mchsi.com>
To: "Mike Goshay" <w6we at bak.rr.com>;
<Heathkit at mailman.qth.net>
Sent: Saturday, August 30, 2008 5:30 PM
Subject: Re: [Heathkit] HW 16 output


> Well, I've heard various things from various people, Mike.  Into a 50
ohm 
> load, my experience has been around 50W out on 80 & 40, around 35-40W
on 
> 15.
>
> I would carefully check the power supply voltages per the schematic - 
> carefully, as they are lethal - and see if the P/S is putting out what it 
> is supposed to.  It's pretty common for some of the 2 watt resistors
to go 
> high and drop the B+ considerably.  And, of course there's the leaky 
> can-caps . ;^)
>
> If that doesn't work and you've got another 6GE5 around you might
try 
> subbing it.  The 6CL6's, too, if you've got them.
>
> Have you done the transmitter alignment?  Sometimes you'll run into a
'16 
> that someone's messed with and got the alignment all balled up.
>
> There's other things that can cause your low output, but I'd look
at those 
> first, were it me.
>
> 73 es GL
> Tom
> ---------------------
> HW-16 Panel Overlays and Multi-Section Electrolytic Cans - 
> www.hayseedhamfest.com
>
>
> ----- Original Message ----- 
> From: "Mike Goshay" <w6we at bak.rr.com>
> To: <Heathkit at mailman.qth.net>
> Sent: Saturday, August 30, 2008 7:06 PM
> Subject: [Heathkit] HW 16 output
>
>
> Will anyone here answer a question on a Heathkit HW16? What is
"supposed" 
> to be the OUTPUT?? All my finals show +-30w on 40 meters. Seems  low to me

> for 90w input ( so they say).  Mike G w6we
>
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