[Kenwood] Problem with "return hf " caused by linear amplifier

[Allan]

Hi Mike,

Thanks for your reply.

I try your instructions and all is ok, power in cw mode is stabe to 100
watts. So it's not dc-dc board failure.

Do you have an idea of the problem ?

Many thanks 

Regards

Allan 

> -----Message d'origine-----
> De : Mike Brown [mailto:k9mi at sbcglobal.net] 
> Envoyé : mardi 18 avril 2006 07:07
> À : Allan; kenwood at mailman.qth.net
> Objet : Re: [Kenwood] Problem with "return hf " caused by 
> linear amplifier
> 
> Allan, the best way to check for the infamous dc-dc board 
> failure, is put the rig in cw mode and push the "send" button 
> (I think, as it's been a few years since I had an 850") but 
> anyway you keydown in cw mode. If it's the dc-dc board 
> problelm, your ouput will vary. It might drop to 90, then go 
> back up, drop again, etc. In other words, in lockdown mode, 
> where it should be steady, it's not.
> 
> 73, Mike K9MI
> 
> 
> ----- Original Message -----
> From: "Allan" <f14at259 at yahoo.fr>
> To: <kenwood at mailman.qth.net>
> Sent: Tuesday, April 18, 2006 06:37
> Subject: [Kenwood] Problem with "return hf " caused by linear 
> amplifier
> 
> 
> > Hi all,
> >
> > I had  a problem with my linear amplifier and I beleive it caused a 
> > "return
> > hf " in the ts-850sat.
> >
> > Now at the maximum power of the transceiver ( linear 
> amplifier switch 
> > off )
> > the modulation is bad, I have the 100 watts pep but no alc 
> indication.
> >
> > At 70 watts ( linear amplifier switch off ) all is ok, 
> modulation and alc
> > indication.
> >
> > Any idea about this problem ? Is it a problem with the DC-DC board ?
> >
> > Many thanks for your help.
> >
> > Regards
> >
> > Allan
> >
> >
> >
> >
> >
> >
> > 
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> 


	

	
		
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