[Boatanchors] Using a SG-230 tuner on AM

[rbethman]

Cutting through a bunch of excess verbiage.

To use a screen modulated radio with a linear amplifier, I.E., a DX-60 
into an Amp Supply LK-500ZB:

Tune DX-60 with amp on standby.  DX-60 will get about 25W out.  The 
light up amp to ON.  Rapidly, tune the Amp for max output.  Observe 
output to see what carrier level you have with the carrier ONLY from 
DX-60.  Ensure you have the "headroom" in the amp.

A DX-60 will do around 25W itself on AM for a carrier.  Fed into Amp 
Supply LK-500ZB, the carrier when tuned for max will be about 300 to 
350W carrier.

Now the control for modulation is the audio level adjustment.  The DX-60 
is on the chassis behind the panel.  The audio chain is what controls 
the screen levels.

Short and sweet!  Forget the this voltage, that voltage, calculations 
and all that!

Now what is YOUR screen modulated rig and amp Carl?

Bob - N0DGN

Gary Schafer wrote:
> In a simple answer, the PEP will never be greater than full carrier power at
> tune up.
>
>   
Really should be DSB with carrier.  The KWS-1 was AM using ONE Sideband.
> With SSB with carrier AM the amplifier must be tuned for maximum PEP that is
> expected. 
>> -----Original Message-----
>> From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
>> bounces at mailman.qth.net] On Behalf Of Carl
>> Sent: Wednesday, August 12, 2009 8:45 AM
>> To: D C *Mac* Macdonald; boatanchors at mailman.qth.net
>> Subject: Re: [Boatanchors] Using a SG-230 tuner on AM
>>
>> Now that the noise has died down I'll get back to the original subject.
>>
>> Ive not disagreed with the math, just the visible proof on my test
>> equipment.
>>
>> Im now perfectly satisfied with the 4X at least with 100% plate modulated
>> Class C.
>>
>> Now for today. How about controlled carrier screen modulation where there
>> is
>> no added modulator power to speak of?
>>
>> Or SSB with carrier?
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
>> To: "KM1H Carl Huether" <km1h at jeremy.mv.com>;
>> <boatanchors at mailman.qth.net>
>> Sent: Sunday, August 09, 2009 3:26 PM
>> Subject: RE: [Boatanchors] Using a SG-230 tuner on AM
>>
>>
>>
>> Carl and otherson the boatanchors list:
>>
>> I believe the SGC-230 is rated at 125 Watts PEP.
>>
>> Since the Viking, DX-100, 32V-*, B&W, etc. ran
>> close to 120 Watts carrier, 100% modulation would
>> cause PEP output to be 400-500 Watts.
>>
>> I don't believe it advisable to risk running that
>> sort of power into the SGC.
>>
>> I'm pretty sure most list members are aware of that
>> fact but I believe that it bears refreshing.
>>
>> 73 - Mac, K2GKK/5
>> Oklahoma City, OK
>>
>>
>> ----------------------------------------
>>     
>>> From: km1h at jeremy.mv.com
>>> To: boatanchors at mailman.qth.net
>>> Date: Sun, 9 Aug 2009 14:30:11 -0400
>>> Subject: [Boatanchors] Using a SG-230 tuner on AM
>>>
>>> Has anyone tried running a 100W output AM rig thru one of these?
>>>
>>> Id like to be able to be able to run a Viking I or II thru one using a
>>>       
>> 160
>>     
>>> and 75M dipole in parallel for 160-20M.
>>>
>>> Carl
>>> KM1H
>>> =
>>>       
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>
>
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>   

-- 
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|             AM Amateur Radio Operator    NØDGN                   |   
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| Bob Bethman                \\\|///     " The absence of a danger |
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