My 10W Mono Single-Ended modules - D10.1

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#105
I know it's possible because I'm using some other shielded surface mount inductors with worse specs (twice as much DCR and about 2/3 the SRF of the SER1360s) and they sound as good as the toroids I've been using and seem to have less EMI (based on what I've seen by bringing my scope probe near the inductors while the amp is powered and bringing a portable am radio near the modules to see if it can still get any stations). I would expect the SER1360s to be better in all aspects, and they should be because they cost almost twice as much as the surface mount ones I'm using now!
 
#109
I had to look through the whole thread cause I couldn't remember where I had posted the info, so here it is again. I ordered enough boards and parts for two extra kits in case anyone else was interested.

BWRX said:
I'm asking $55 shipped in the US ($60 shipped outside the US) for a kit which includes all the necessary parts to build up two modules. You would need to find, build, or buy a +/-12V supply to power these little guys.

If you're interested please get in touch with me via email.
Click to expand...
 
#110
The parts order is now in the system. Boy was it ever a whopper! I was feeling nice and as a result the kits will include 4 PCB standoffs and 4 screws per board (4-40 thread size) as well as your choice of red or blue LEDs.

Also worth mentioning is that I have chosen the components such that the gain of the modules is 8.2V/V or 18.28dB. This means a 1Vrms input signal will drive the amp into clipping. If you need more or less gain let me know and I'll see what I can do to help make that happen.
 
#113
Thanks guys. We're all here cause we love audio stuff and it's nice to know the person on the other end will appreciate that little extra effort.

It was actually Roger who gave me the idea of including pcb standoffs 🙂
 
#116
14v Power Supply

This may be drifting back to a somewhat off-topic part of this thread, but it should be of interest.

Way back on page 8 of this thread: http://www.diyaudio.com/forums/showthread.php?postid=981045#post981045
Anonymous1 described a way to change the voltage of the 14v monitor SMPS available on eBay. I thought I'd share my experience.

In the closed boombox in which I'm using it to power a SI board, yesterday, I drove the Tripath into thermal shutdown at the full 14.1v stock PS voltage. The ram-heatsink attached to the chip measured 119F (Infrared thermometers are great for this) at the time.

I followed the suggestion and soldered a pair of leads on either side of R015--fairly easy as smd soldering goes, as there's a little trough on either side that the wires fit into. The leads were connected to a 20k pot, just off-board. Dialed it right in to 13.1 v, and now the Tripath chip is running at about 100F, not shutting down, and the SMPS is running a few degrees cooler as well.

Don't have a lot more to say so it didn't seem worth starting a new thread.

--Buckapound
 
#117
Welcome to the forum Bob. It takes a special kind of person to be a firefighter. I know this because one of my best friends used to be a volunteer firefighter and EMT. Now he's a paramedic and gets to fly on the medevac helicopters and stuff.

I got to ride in an ambulance a few times too, which was a bit of an adrenaline rush when they got a call. I can imagine you'd get the same feeling riding the big red bus to a call as well!

I've got enough stuff coming in for a couple extra kits so I'll reserve one for you if you're interested. I'll send you an email with more details.
 
#118
Buckapound, thanks for posting your findings on being able to adjust the switching supplies. The method you used of soldering a pot in parallel is probably the best because it allows you to easily fine tune the output voltage without much work.
 
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