[AMPS] L4B parasitic reistors

[Lane Zeitler]

And I thought this would be a quiet week..........

Lane
Ku7i
----- Original Message -----
From: measures <2@vc.net>
To: Kevin P <kpevin@mediaone.net>; AMPS <amps@contesting.com>
Sent: Tuesday, April 18, 2000 8:58 AM
Subject: Re: [AMPS] L4B parasitic reistors


>
> >Hi All,
> >
> >I picked up a very nice L4B the other day that works FB (only used it on
> >40/80m though).  When I took it apart to clean the tubes and dust off the
> >chassis I noticed that two of the three 15ohm 2watt resistors on the each
> >suppressor was completely burned through in half.  Interstingly, one
> >resistor out of the three on each one looks like it never got hot at all.
> >I am going to replace all the resisters but I was wondering why two out
of
> >the three resistors are almost vaporized while one is intact.  I dont see
> >any sighs of arcing or overheating anywhere else in the amp - it looks
> >like brand new otherwise.
>
> The only possible way to toast suppressor resistors on 40m/80m is to have
> an intermittent VHF oscillation.
> >
> When R-supp burns out, it is not because the resistors were defective.
>
> later, Kevin
>
> -  Rich..., 805.386.3734, www.vcnet.com/measures.
> end
>
>
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