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September 27, 2021, 05:51:30 AM

Author Topic: Resistor ID help  (Read 342 times)

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Offline Markkr

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Resistor ID help
« on: August 28, 2021, 05:01:18 PM »
Page 31, second step asks for a 220K ohm 1w resistor (red,red,yellow, gold) for the R4 position. The closest resistor I have in my kit is (red,red,brown,gold) and it measures 216K ohm. Is this the correct resistor for R4? (Maybe its just a typo in the instructions)

Online Paul Birkeland

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Re: Resistor ID help
« Reply #1 on: August 28, 2021, 05:15:11 PM »
Red, red, yellow, gold is 220K.  If it's 1% off, it will measure around 217K, and there's also meter tolerance, so no worries there.

-PB
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Markkr

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Re: Resistor ID help
« Reply #2 on: August 28, 2021, 05:21:11 PM »
Thanks Paul, I dont have a red,red,yellow,gold… I only have red,red,brown,gold which measures 216

I’m starting to feel bad about asking Eileen to send me parts, (this is the third missing part)
« Last Edit: August 29, 2021, 02:53:26 AM by Markkr »

Offline FS

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Re: Resistor ID help
« Reply #3 on: August 28, 2021, 06:31:44 PM »
So what's the problem? You need a 220K resistor, and the one you have measures 216K.
Apparently, you have a red/red/yellow/gold resistor...you just can't tell yellow from brown... ;)
I would feel bad, too, if I were  to ask Eileen to replace that part... ;D :P

Offline Markkr

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Re: Resistor ID help
« Reply #4 on: August 29, 2021, 03:02:22 AM »
DISREGARD, I just figured out my problem...

I was building last night while too tired.

I retraced the previous few steps on the Bias board, and yes, apparently I used the wrong resistor for a previous step because I couldn't tell the difference between yellow and brown

Online Paul Birkeland

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Re: Resistor ID help
« Reply #5 on: August 29, 2021, 06:22:17 AM »
I'm glad you caught that.  Putting the carbon film resistor in that position and turning the amp on would do quite some damage!
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man