Speaker Testing Jig Assembly Thread - Page 4 - diyAudio
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Old 15th March 2010, 07:11 PM   #31
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Join Date: Mar 2009
Default Jumpers

Just finished building my Jig, great quality. You might want to include the jumpers in your instructions, get a sense that some of those who build this may be newbies and miss the need for them. I read your assembly instructions and did not find a refernce to them.

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Old 16th March 2010, 12:03 AM   #32
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Join Date: Mar 2007
Hi Mike,
Yes, I thought of that after and I've been meaning to get a mod to insert a post in there covering it but I've just been too busy.
The new boards have "jumper" printed on in the silkscreen:


It's hard to think of everything - we have a "work in progress" here.

Glad you like the jig - have you tried it yet?
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Old 16th March 2010, 03:04 AM   #33
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Default Time

Not tried it yet,
I'm in the process of finishing a new house in the country and if I set up my new electronics room before I finish the WAF will drop to zero, hope to be in a position to "indulge" in about 6 months.

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Old 16th March 2010, 06:56 PM   #34
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Location: Metro Washington DC
Originally Posted by MJL21193 View Post
Hi Duda,
I used 2 products in finishing mine and both are in spray cans.
This can give a pretty good paint job for less than $20.
Hope that helps
Thanks John - I think I can managed that...
"All measurements are wrong! Thus, measurement is the art of handling errors."
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Old 29th March 2010, 08:45 PM   #35
40 watt is offline 40 watt  Canada
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Join Date: Jan 2009
For the wall wart I have on hand a Hon-Kwang Class 2 transformer: It came from some Christmas light LED string thingy...which never worked right and pissed my mom off a few years back. It would light up and then shut off quickly. One of those multi-color, multi program thingies.

Input: 120V 60Hz 18W

Output:12VAC 840mA

so...840mA= .840A.

Suitability: at least for testing or temporary use 'til I find a bigger one?

A]: "...more power, Scotty!"

B]: "...she can't take much more of this, Captain!"

C]: "...Beam me up Scotty...there's no intelligent life here!"
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Old 30th March 2010, 04:09 PM   #36
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
well done MJL.
Everything fits.
I am glad I did not have to source all the hardware to fit those footprints.

Can someone confirm the orientation of the ON LED? I think the LED flat goes to SW2 side and the longer leg faces towards the outside of the PCB.

Thanks for all your efforts.
regards Andrew T.
Sent from my desktop computer using a keyboard
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Old 30th March 2010, 06:41 PM   #37
40 watt is offline 40 watt  Canada
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Join Date: Jan 2009
I put the LED flat side [cathode, short lead, or negative] facing to the inner portion of the panel and the other lead [anode, long lead, positive] to the outside of the front panel. I could well be very wrong on this.

I do recall being confused because of trace route FROM LED through R1, through jumper and over to negative side of 4700uf capacitor.

The other trace route comes direct from diodes.

The confusing part is I'm more familiar with the resistor in series on the power supply side, and now it's been awhile since I assembled it so it's not that fresh on the brain.

I haven't run any power through it yet, though...

I think I based my logic for install on this diagram:
Attached Images
File Type: png LED,_5mm,_green_(en)_svg.png (30.4 KB, 253 views)

Last edited by 40 watt; 30th March 2010 at 06:57 PM.
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Old 30th March 2010, 07:19 PM   #38
40 watt is offline 40 watt  Canada
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I think my wall wart has the wrong diameter inner hole for the out plug. i suspect 2.5mm or greater, though the outside barrel is correct.

So...I'll change plug barrel or just get the 1 amp unit.

Now I recall the wall wart came from a small Christmas tree on a rotating stand with a single bright bulb at its base and fiber optic lines above the glass [mulit-color] lens the fiber optic lines change color as the tree spins.

I have been thinking of adapting parts for a psychedelic volume control bezel for a preamp, with small dots of light around the bezel changing color as the volume increases to full volume showing the atomic symbol, all lit up nice and bright with extra strands of light pipes. Johhn's face-plate etching would be a perfect methodology for this custom bezel circumferencing the volume knob.

I digress...as usual.

Last edited by 40 watt; 30th March 2010 at 07:39 PM.
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Old 30th March 2010, 07:42 PM   #39
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Location: Toronto, ON, Canada
I didn't read too much of the thread but it looks like you might have a 5.5mm/2.1mm and need a 5.5mm/2.5mm.
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Old 30th March 2010, 08:04 PM   #40
40 watt is offline 40 watt  Canada
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I don't know what sise my plug is but it seems sloppy a bit when fitting over the male inner prong on the board input until the outer barrel centers it well.

That inner male prong on the circuit board looks smaller than my transformer plug orifice, but 4/10 of a mm is hard to judge.
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