Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Mid-Ranger on December 30, 2014, 06:35:36 AM

Title: Resistance Checks [solved]
Post by: Mid-Ranger on December 30, 2014, 06:35:36 AM

Ok this experience has been a hoot so far! I can feel the addiction growing even now......

I have completed assembly on my Crack and have done the resistance checks. Everything checks out good but for two spots......but I'm wondering if it may be user error with my meter. I have a Gardner Bender cheap multimeter, and it is not auto ranging.

The two question marks are:

13 - 1.0
Center pin reads .8-.9 on the lowest(?) meter setting

13 does climb slowly but then ends at 1

Any ideas would be appreciated.

Title: Re: Resistance Checks
Post by: Paul Birkeland on December 30, 2014, 07:01:00 AM

I guess one question might be which of their meters you are using?

On some meters, a 1.0 is how they indicate that you are over the measurable limit (a good thing for 13), which is a little annoying, as actually having 1 Ohm there would be a horrible thing.  Since you say it climbs slowly, I would imagine that you're OK on that one.

Is the center pin referring to the 9 pin socket or one of the RCA jacks? 

If its .8 to .9 Ohms, that shouldn't present a problem.  If it's .9K or .9M, that would be a bad thing on the center pin of the 9 pin jack. 

-PB

Title: Re: Resistance Checks
Post by: Mid-Ranger on December 30, 2014, 07:33:57 AM

The meter is  model number GDT-311.

And I wondered what center pin meant also.....the crack manual just says center pin should measure 90Kohms-100K ohms.

I measured the center pin of the small tube socket.......

Title: Re: Resistance Checks
Post by: Paul Birkeland on December 30, 2014, 07:48:33 AM

The center pin being 90K-100K is the center pin of the RCA jacks.

-PB

Title: Re: Resistance Checks
Post by: Mid-Ranger on December 30, 2014, 08:12:29 AM

Thanks much for the replies and help, I do appreciate it.

The center pin of the rca jack measures slightly under, 88.3 instead of 90-100. Not sure if this is a red flag.....

I did singe the white wire insulation in the set of three braided wires between the rca jacks and the potentiometer. Could that have caused the slightly low reading?

And I rechecked 13, it measures good, it was user error with the meter.

Title: Re: Resistance Checks
Post by: Paul Birkeland on December 30, 2014, 08:28:16 AM

88.3K is close enough.  0 would be an issue though.  Burning the insulation isn't important unless there's a hole in the insulation that could allow that wire to touch something else that's metal.

-PB

Title: Re: Resistance Checks
Post by: Mid-Ranger on December 30, 2014, 12:59:22 PM

Thanks for the help all voltages were good...........nothing blew up and I didn't die  ;D........crack is up and running and sounding good so far!