54 CA, to fix it or not to fix it, that is the question


Joe
 

Hello,
sorting some of my plug-ins in very different condition I have come across the following "almost twins":

1. A well known CA plug-in, in working order, has always been a good work horse with my 545B
2. A 54CA plug-in, once bought in a bundle for parts. Wiring etc looks rather similar - but not in detail! - to the CA unit, and at least all tubes and the two-potentiometer-combo at the rear faceplate are missing.

So now I have three choices:
1. Look for the pots and fix it. I think I should have all necessary tubes.
2. Keep and leave it as it is to have the parts at hand if I ever needed to repair the CA.
3. Sell it, because CAs never die.

I have just created a photo album showing the questioned items and would like to hear some opinions. Thanks in advance!
Regards, Joe


Leon Robinson
 

Number 1 sounds like more fun.

If I remember right I think I have a 53/54C out in the storage shed



Leon Robinson  K5JLR

-------- Original message --------
From: Joe <The-Lohrbach-Family@t-online.de>
Date: 02/22/2021 1:53 PM (GMT-06:00)
To: TekScopes@groups.io
Subject: [TekScopes] 54 CA, to fix it or not to fix it, that is the question

Hello,
sorting some of my plug-ins in very different condition I have come across the following "almost twins":

1. A well known CA plug-in, in working order, has always been a good work horse with my 545B
2. A 54CA plug-in, once bought in a bundle for parts. Wiring etc looks rather similar - but not in detail! - to the CA unit, and at least all tubes and the two-potentiometer-combo at the rear faceplate are missing.

So now I have three choices:
1. Look for the pots and fix it. I think I should have all necessary tubes.
2. Keep and leave it as it is to have the parts at hand if I ever needed to repair the CA.
3. Sell it, because CAs never die.

I have just created a photo album showing the questioned items and would like to hear some opinions. Thanks in advance!
Regards, Joe


Daniel Koller
 

Fix it!!
I had the same dilemma.    Let me just preface what I did by adding that my 545 is my main scope - the one I go to and turn on if I need to look at something.  So I need a working CA.  I had 2 of them.  One had broken and scratchy pots and didn't work, so I at one point I even wrote "for parts" in magic marker across the front, the intent being to use it to fix the other.  Then, my other unit stopped working one day and it turned out the "for parts" unit sort of worked.  So I ended up keeping it and fixing both of them so I have an active spare.
  It helped that A) I can't really "scrap" anything, and am inclined to fix it like the Morlocks, and B) I happened to have some pots from another plug in that I had earlier scrapped for real and C) there is a series of these plug-ins in which the failure mode of the pots is that the plastic around the center shaft cracks, and the set screw can no longer be tightened.   I have a lathe so I machined a metal reinforcing ring that holds the pot tight on the shaft.  I bet a skillfully selected piece of tubing or pipe will work too.
   I am sure some suitable donors will turn up at a hamfest or on e-bay that are in far worse shape than yours, and they you can scrap that plug in "guilt free" and have two working units in the end.
  Dan

On Monday, February 22, 2021, 05:20:09 PM EST, Leon Robinson <leon-robinson@sbcglobal.net> wrote:

Number 1 sounds like more fun.

If I remember right I think I have a 53/54C out in the storage shed



Leon Robinson  K5JLR

-------- Original message --------
From: Joe <The-Lohrbach-Family@t-online.de>
Date: 02/22/2021  1:53 PM  (GMT-06:00)
To: TekScopes@groups.io
Subject: [TekScopes] 54 CA, to fix it or not to fix it, that is the question

Hello,
sorting some of my plug-ins in very different condition I have come across the following "almost twins":

1. A well known CA plug-in, in working order, has always been a good work horse with my 545B
2. A 54CA plug-in, once bought in a bundle for parts. Wiring etc looks rather similar - but not in detail! - to the CA unit, and at least all tubes and the two-potentiometer-combo at the rear faceplate are missing.

So now I have three choices:
1. Look for the pots and fix it. I think I should have all necessary tubes.
2. Keep and leave it as it is to have the parts at hand if I ever needed to repair the CA.
3. Sell it, because CAs never die.

I have just created a photo album showing the questioned items and would like to hear some opinions. Thanks in advance!
Regards, Joe