Go back to the original plate choke and try it
Carl
KM1H
----- Original Message -----
From: "Mike & Becca Krzystyniak" <k9mk@flash.net>
To: <Amps@contesting.com>
Sent: Monday, November 22, 2010 3:57 PM
Subject: [Amps] Dentron DTR-2000L Tank Circuit
> Howdy,
>
> Recently I wanted to give a hardware facelift to my old Dentron
> DTR-2000L, mostly because it is pushing 20++ years in age. I was not
> looking to do the perfect rebuild with proper protection circuits and
> other
> but instead simply doing a component refresh and adding a little
> robustness
> to the original component selection.
>
> Beefing up the power supply diodes and capacitor updates were straight
> forward. Then, for what ever reason, I decided to try a new plate choke
> and
> also went about changing out the smaller door knob caps with some of the
> Russian door knob caps of the same value. I'm not sure where things went
> wrong but the tank is all hosed up now. 160m tuning is barn door wide.
> 80/75 has little to no dip and the loading seems to be out in left field
> somewhere. 40m and 20m are not much better but at least they show
> somewhat
> of an expected response when dorking around with the knobs. I didn't even
> try 15m or 10M as those bands tend to cook stuff beyond repair if not
> close
> to begin with.
>
> So, instead of doing a complete rip (backing out all the upgraded
> components 100%), is there a simple way to see where things moved too? I
> have heard you can use an antenna analyzer for verifying the putput Z for
> a
> given load. Is this as straight forward as it sounds? Any advice on how
> to
> hammer things back to expected values for this class of desktop amp?
>
> Thanks in advance.
>
> 73's Mike K9MK
>
>
>
>
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