Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Quickie => Topic started by: karl on July 13, 2012, 03:21:33 PM

Title: No Right Channel
Post by: karl on July 13, 2012, 03:21:33 PM
I just finished and tested the Quickie. Everything went well. After switching on the power, only the left channel operates. I checked everything visually. I also swapped tubes with no change.

Any ideas?

Regards,

Karl
Title: Re: No Right Channel
Post by: Grainger49 on July 13, 2012, 04:03:43 PM
How did the resistance and voltage checks go?
Title: Re: No Right Channel
Post by: earwaxxer on July 13, 2012, 05:38:10 PM
prob the connection to the volume control...Just a thought. Turn it on and move all the wires until you find one that is loose.
Title: Re: No Right Channel
Post by: jmv on July 14, 2012, 04:08:29 AM
Are you getting a good connection?  It's easy to put too much solder into the cup of the RCA jack, and it will flow up into the jack and prevent the plug from seating firmly.  Not that that has ever happened to me.
Title: Re: No Right Channel
Post by: Grainger49 on July 14, 2012, 04:59:17 AM
If it is an open as Eric suggests that is a pretty short path.  Start by clipping one lead of your meter on the center conductor of the right channel input and select it.  Set your meter on resistance, if it has a continuity beeper set that on.  Set the volume pot at 100%, fully CW.

Now measure resistance to the lug on the input selector switch for this RCA jack.  It should be low, like an ohm. 

Continue through these points:

The center lug of the selector switch on the right channel
The lug on the pot, an outside lug, that this lug on the selector switch feeds
The center lug on the same deck where it comes out of the pot
Tube pin 3 of the right channel tube

This whole path should be an ohm or two.

Now check the solder joint on right channel tube pin 2 and the solder joint on the center conductor of the right output RCA jack.

That is it!

Somewhere you might lose continuity.  Touch up the solder joint where it disappears.
Title: Re: No Right Channel
Post by: karl on July 14, 2012, 07:55:59 AM
I appreciate everyone's suggestions. I reflowed some joints, and I now have both channels.

It's wonderful.

Regards,

Karl