[ARC5] [External Sender] Resistor Excursions

[scottjohnson1 at cox.net]

Silver is 10%, no band is 20%

 

Scott

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of J Mcvey via ARC5
Sent: Friday, April 19, 2024 17:14
To: arc5 at mailman.qth.net; Richard Knoppow <1oldlens1 at ix.netcom.com>
Subject: Re: [ARC5] [External Sender] Resistor Excursions

 

A 20% tolerance spec was common in tube equipment (silver band)... If you are looking for perfect readings , it will be hard to find.

The designers were apparently OK with large excursions.

 

On Friday, April 19, 2024 at 07:17:08 PM EDT, Richard Knoppow <1oldlens1 at ix.netcom.com <mailto:1oldlens1 at ix.netcom.com> > wrote: 

 

 

    While I generally agree with this it is often not true for 
resistors. If you measure a resistor in place it will measure either the 
correct value or less. If it measures higher its bad. Can sometimes save 
some time when trouble shooting. Caps are a different matter and 
generally have to be disconnected to get a valid meaurement.

On 4/19/2024 10:21 AM, Bill Henderson wrote:
> As a general note, it is always best to measure any component 
> (especially resistors) disconnected from circuit.
> 
> Simply disconnect one end before measuring.
> 
>   - Bill H / va3hwa


-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998


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