[Boatanchors] Eico 950B question

[Brian Harris]

Richard,

By now you realize the bridge is working as it should.  One to be careful with is when you test large caps at higher voltages.   When you are through with the test turn the voltage down slowly rather than rapidly slamming it to zero because if you the cap will be discharging into a very low resistance (the wiper to the ground end of the pot) which will fry the end of the pot. 

Sent from my iPhone

On Jul 2, 2013, at 7:38 PM, "Richard Knoppow" <1oldlens1 at ix.netcom.com> wrote:

> 
> ----- Original Message ----- From: "Garey Barrell" <k4oah at mindspring.com>
> To: "Richard Knoppow" <1oldlens1 at ix.netcom.com>; "Boatanchors" <Boatanchors at mailman.qth.net>
> Sent: Tuesday, July 02, 2013 1:16 PM
> Subject: Re: [Boatanchors] Eico 950B question
> 
> 
>> According to the manual, the bridge is operated on the '54 VAC' winding of the transformer.Keep in mind that the smallest resistor typically found in electronics of the day was a 1/2W.  If there is more than 1/2W dissipation in test, then you probably should be testing on another range!!  :-)
>> 
>> 73, Garey - K4OAH
>> Glen Allen, VA
>> 
>> Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
>> and TR-4/C Service Supplement CDs
>> <www.k4oah.com>
>  Thanks to all who responded to this.  You have confirmed my analysis of the circuit.  I saw the 500 ohm resistor but have not checked it for value.  I think this box is just not meant for low dissipation resistors.  I mainly wanted to see if it was a decent capacitor checker and it seems to be.  It has a number of electrolytic caps in it that probably should be replaced.  I have no memory of where I got it but think it was given to me years ago by someone who was cleaning out their junk. To me nothing that will do its job is junk.
> 
> 
> 
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk at ix.netcom.com 
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