Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB

[gary s]

My wife will not let me have a messy workbench at all, so I spend 10 mins after I use it to tidy it up. If I miss tidying it up, then when I am not looking she will get there and tidy it up and that is when I can't find anything any more.

 

[zman01]

My workbench is sort of like coordinated chaos!! It’s a perfect mess though because I still know where everything is

Same here Vunce.

And in the same boat as Gary S - if wife tidies up, can't find my stuff...

 

[pinnocchio]

Just missing a reflow station and hot plate which are the next purchase. They're in the cart just waiting for me to press GO! But I'm waiting...

 

[mbrennwa]

Can someone tell me the board dimensions and the spacing of the mounting holes?

 

[xrk971]

Specification in Post 1:

Specifications:
- PCB size is 70mm x 35mm and the M3 screw mounting holes are 62mm x ~26.5mm

The design dimensions are above. I will measure the actual production batch again to confirm.

 

[astromo]

My wife will not let me have a messy workbench at all, so I spend 10 mins after I use it to tidy it up. If I miss tidying it up, then when I am not looking she will get there and tidy it up and that is when I can't find anything any more.

Simple fix for that mate ... lock the door..

 

[redjr]

I’m there now Zman!!
My USSA5 is singing away with the SSR boards installed and they work perfectly!
Instead of using the SLB faston tabs to run the power for the very small gauge wire to the protection boards, I tapped off of the TP1 & TP2 positive and gnd vias with 22awg silicone jacketed flexible wire. Since it’s a dual mono power supply I did not want to run both boards off of one SLB for fear that the ground would be contaminated between power supplies. Also, the speaker return goes to its own channel SLB gnd tab bypassing the SSR board. In summary, the only connections at the SSR board are: amp in(+), speaker out(+) and DC power in(+/gnd). Four wires ultra simple
They work as described, nice 3 second turn on delay and when amp power is cut, so is any residual signal to speakers, immediately. Installing these gives your diy project a very commercial ”safe” feel to it.
Nice work Jhofland, JPS64 and X!!! Thanks.

I like it! The form factor is cool. Kind of a 'tower' amp! Very nice HSs too.

 

[tcpip]

Doesn't the module have static sensitive transistors? And if yes, do the modules need to be stored in static safe packing?

 

[xrk971]

Technically, yes - MOSFETs are ESD sensitive. Try to self discharge your fingers before handling them. Although they are quite rugged and there is a transzorb to help protect the devices.

 

[xrk971]

Glad to see more orders of the remaining SRR’s coming in. Just had 6 more taken.
Thank you!

 

[darrr]

The parcel arrived. It came to the customs office but I didn't have to pay tax. So I'm doubly happy.
Thanks for successful transaction.

 

[xrk971]

That worked out well with the taxes. I think the cost is low enough that it tends to go through without issue. Let us know how they work out.

 

[darrr]

I do not know exactly. The package from digikey was taxed VAT but it was shipping by UPS. In this case, the customs office of the Polish post office didn't decide on tax.

 

[esprit]

Really sorry but I am out. Due to UK VAT and handling charges.

Best Regards

 

[wtl]

Boards arrived yesterday No damage.
Tiny Little buggers!!!
Many Thank's to all involved.

Steve.

 

[xrk971]

Yes, they were designed to be able to fit inside just about any amp without taking up a lot of room. Glad they got there safely.

 

[mzisman4]

Not sure how generally useful these will be but I threw together simple mounting plates. These are designed to reuse screw holes on a gfa-555 but could be used more generally. Altering would likely take as long as recreating from scratch but hopefully this plants some seeds ...

https://www.thingiverse.com/thing:3962725

 

[xrk971]

Neat! Thank you!

 

[meanie]

Received my parcel, will test and use them soon.

Thanks X!

 

[wtl]

Boards in place (seems too easy!) Have I got wired right X.
V+ to positive pin on board.
Other pin to ground.
Steve.