[Heathkit] Possible success? (was DX-100B on Phone - bad audio distortion /oscillation)

[bcarling@cfl.rr.com]

A lot seems to depend on how well these rigs were assembled in the first place. They must have the star washers, and they need to be tightened enough to bite into the chassis and hardware enough to prevent bad connections later in life when the surfaces exposed to air etc. start to oxidise.

Wishing you every success and happy holidays.

Bry, AF4K

Bry Carling

Sent from myTouch 4G, please excuse my brevity.



----- Reply message -----
From: "Bill Cromwell" <wrcromwell at gmail.com>
To: <heathkit at mailman.qth.net>
Subject: [Heathkit] Possible success? (was DX-100B on Phone - bad audio distortion /oscillation)
Date: Mon, Dec 19, 2011 10:59 am


Rick said:

---snip---

6.? Loosened and retightened all screws that were responsible for 
grounding anything, including one of the screws that holds the PA 
shield in place (couldn't get at the other one).

---snipped some more---

Hi Rick,

I just had to do the same thing to the same shield in my Johnson Ranger.
It was necessary for me to do all three (I haven't looked in my DX-100
yet). One of them is inaccessible without removing some other
subassemblies first. That part was very painful, especially getting
those other subassemblies installed back into the transmitter again. Two
of the screws for those subassemblies required almost an hour of trying
- each!. It was worth the trouble because now all of the spurious
oscillation is *GONE*. One day when you don't have distractions or
pressure I would recommend revisiting that "other one" and making sure
it is doing it's job. I lost a lot of time in a contest working on my
Ranger. I tried doing just the two I could get to easily and thought I
had fixed it. I had only improved it. I had to open it again and then do
the real work for that last screw. Isn't running old gear wonderful?
<evil grin>

73,

Bill  KU8H

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