Sproing issues

[Aquaticwombat]

Anyone had any issues? My signal dies going into IC2. No output, swapped 072s, new socket. It's an excellent mute switch right now

 

[Aquaticwombat]

 

[Aquaticwombat]

 

[Aquaticwombat]

The melt fail just happened, nothing was working before that

 

[ADAOCE]

I assume you are using an audio probe if you know where your signal dies? Check the part right before it for correct solder joints or a solder bridge somewhere.

Hopefully the belt on brick isn’t in too much trouble after the melting

 

[Robert]

Another member is having a similar issue. I'll have the schematic posted shortly.

 

[Aquaticwombat]

I assume you are using an audio probe if you know where your signal dies? Check the part right before it for correct solder joints or a solder bridge somewhere.

Hopefully the belt on brick isn’t in too much trouble after the melting

You mean they aren't meltin' bricks? Misread that. Dang.

 

[Harry Klippton]

The brick should be fine. The casing is pretty thick. I recently opened one to remove the modulation

 

[fig]

My guess would be that the Sproing spring sprung.

 

[Cvoxdog]

My sproing is doing the same thing. It just mutes the signal. No reverb going on here. Not sure what the problem is.

 

[Aquaticwombat]

Glad I'm not the only one!

 

[Cvoxdog]

I nuked my brick multiple times trying to problem solve just because...

 

[Cvoxdog]

Anyone able to get this one going yet?

 

[Robert]

My apologies! I was communicating with a couple folks via PM / email and just assumed it was you!

There was a manufacturing defect on a few of the first batch of Sproing PCBs. Rather than sort through the entire batch I just tossed them all and reordered. I've been assured that the equipment failure that caused the issue has been resolved, but just to be absolutely sure I have moved the PCB production up to a higher class and opted for full 4-wire Kelvin testing.

Check to see if Pin 1 of the lower TL072 is shorted to ground.

If so, I'll need to get a replacement shipped out to you. I'm expecting them to arrive today.

 

[Aquaticwombat]

Aaand that's the problem with mine. Nice healthy beep.

 

[Robert]

Aaand that's the problem with mine. Nice healthy beep.

I apologize! I'll make sure to send a replacement along with your order that is shipping today (assuming DHL brings them in time).

 

[fig]

The ‘ol Vcc to GND switcheroo trick eh?

 

[Aquaticwombat]

I apologize! I'll make sure to send a replacement along with your order that is shipping today (assuming DHL brings them in time).

I appreciate it. I was gonna say, you can just hold my order from this am until they come in. It's not a rush. I appreciate it!

 

[Robert]

The ‘ol Vcc to GND switcheroo trick eh?

Well, it's the output pin of the input buffer, so not as destructive but just as devastating to operation.

 

[fig]

a higher class and opted for full 4-wire Kelvin testing.

Well if they turn out to be someone other than Kelvin, being outclassed will be the least of mankind’s worries.