[AMRadio] DX-100B, output falls off gradually

[wb3fau at att.net]

heres a few things  you  can  check-  when  you  unkey it, or turn off the plate  power,  check to  see if the  grid drive   falls  off immediately.
if  not,  here is where  the problem  is.  another thing  to  check  is 
the  bleeder resistor in the HV power supply-  it might be open.  

--- On Sat, 11/19/11, L L bahr <pulsarxp at embarqmail.com> wrote:

> From: L L bahr <pulsarxp at embarqmail.com>
> Subject: Re: [AMRadio] DX-100B, output falls off gradually
> To: "Discussion of AM Radio in the Amateur Service" <amradio at mailman.qth.net>
> Date: Saturday, November 19, 2011, 7:44 PM
> Would you think maybe the energy
> stored in the filter caps and choke might have something to
> do with this?
> 
> Lee, w0vt
> 
> ----- Original Message -----
> From: "Rick Poole" <wa1rkt at arrl.net>
> To: amradio at mailman.qth.net
> Sent: Saturday, November 19, 2011 2:15:01 PM
> Subject: [AMRadio] DX-100B, output falls off gradually
> 
> 
> Well, this is interesting...  Running some tests on my
> DX-100B into a 
> monitor scope and dummy load, I find that in AM mode, when
> I turn off 
> the Plate switch, the RF output as shown on the scope falls
> off 
> gradually over a period of about 1 second rather than
> dropping immediately.
> 
> Obviously, after I get my TR relay built and in line and
> hook up the 
> receiver, it's not going to be good if the TR relay drops
> out while 
> output power is still falling.
> 
> Any idea what causes this?  Is this a known problem
> with a known fix?
> 
> Rick WA1RKT
> 
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