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

[L L bahr]

First off, what makes you think it is not supposed to happen?  Where did you get this idea?  Where have you come up with this untruth?  As mentioned earlier, if you put in bigger caps, the bleed off time will be greater.  If you want to shorten the bleed off time install smaller bleeder resistors with the trade off being more heat and more demand on the supply.  I think you are hoping for something not in the design.  If you want the relay to actuate with a delay, use an electrolytic across the relay coil if you are applying DC to the relay. (The greater the cap capacity the greater the delay).   Or, use either a dc or AC short delay time delay relay.

If you look at some sophisticated signal analyzer and identifiers you will see they use the attack and decay time characteristics as one indicator of the characteristics of the transmitter under scruteny.  This subject also includes the discussion of "soft" and "hard" keying characteristics of the transmitter.

Lee, w0vt 


----- Original Message -----
From: "Rick Poole" <wa1rkt at arrl.net>
To: amradio at mailman.qth.net
Sent: Saturday, November 19, 2011 7:00:57 PM
Subject: Re: [AMRadio] DX-100B, output falls off gradually

At 07:44 PM 11/19/2011, L L bahr wrote:

 >>>>>
>Would you think maybe the energy stored in the filter caps and choke 
>might have something to do with this?
<<<<<

Of course, Lee, but that ain't how it's supposed to act... the output 
isn't supposed to just be getting started falling when the TR relay 
drops out, so that while the power continues to fall, it does so into no load.