voltage measurement problems after output upgrade BeePre 2

[Paul Birkeland]

I'm talking about the DC resistance between each of these two terminals and ground.  Your readings don't make a whole ton of sense. In a properly functional BeePre, these should be OL, in your BeePre one may be close to 0.

 

[denteom]

Sorry about that, didn't get instructions right. When I measured again I got the same reading on both the empty lugs, it showed infinity result.
There were time when I got 0 ohm, but upon checking the lead was touching the nut beside it, so I think that was an error on my part.

 

[Paul Birkeland]

You want to be sure that the nuts that hold the switch together aren't allowed to touch the metal on that switch position.  That is about the only mechanism for losing a channel only on that switch setting.

 

[denteom]

Ok so you mean, I should tighten it and try again?

 

[Paul Birkeland]

No, I mean you need to physically inspect the switch to be sure the nuts and hardware on the switch itself are not contacting the empty lugs I point to with the arrows.

If those lugs touch the metal switch hardware, that will short a channel to ground when the switch is on the -0dB setting.  That is how you lose a channel with the way the fine switch is wired.

Again this is undesired metal-to-metal contact on the switch itself that needs to be addressed.

 

[denteom]

OK, thanks for the tip. I'll try to check on it during daytime, so I can have more light. Hope that will be my last issue. Give you a feedback in a day or two.

 

[denteom]

Thanks got everything sorted out, My Beepre2 is singing so beautifully.  On to the next Bottlehead kit!

 

[denteom]

Just a last minor problem, I still sometimes get a loss of signal on the left speaker.  But this time just doing light tapping on the fine knob at 0 db will already do the trick (no need for wiggling the knob).  It sometimes occurs after playing music for awhile like 5-10 minutes. Hope that goes away through time.

From our last exchange of text, I really did not find something shorting it.  What I did last time was just loosened and re-tightened (but not too tight) the screws holding the assembly of attenuators to the chassis. Somehow things improved with that maneuver. 

But still randomly I run into that problem. Once I get back the sound the left channel, sounds really balanced and no distortion.

Overall the Beepre 2 sounding really fantastic!