[pradjs] Re: basic fix on the board
- From: Wink Junior <winkjunior@xxxxxxxxx>
- To: pradjs@xxxxxxxxxxxxx
- Date: Sun, 21 Feb 2010 13:50:59 -0800
I'd like to suggest everyone thank Mike for being so devoted to
keeping PRA up and running, on a shoe-string budget, and at great
expense to his limited personal time. Yaaaay Mike!
Geek out notes: it was a capacitor for the monitors / speakers that
had come loose and had to be re-soldered. Reading the schematics,
there are two in series for each mono channel, for the left and right
monitors each. They are prime suspects for the continued mild hum.
The other possible cause of the hum might be fixed by adding some kind
of power-conditioning to the board, which I am researching.
If anyone knows of a non-battery/UPS power conditioner that's reliable
and affordable, please let us know!
Lastly, the loose part was an AC-to-DC step up/down converter, not a
battery. :) There are three on the power supply, to run the CUE
signal, the MONITOR signal, and the MAIN output from the board, all of
which put out different levels.
Unfortunately, the board is currently set up to run the MAIN and
MONITOR off the one MONITOR output, which means the new speakers could
not get enough power. Tthe old ones, which are powered monitors, had
to be put back in (the new ones could barely produce bass because the
woofers require a lot of power.)
I'd like to address this and put back in the new monitors at some
point - unless (!!) a majority of people prefer the old ones? If so,
let me know so I can get back the new ones and put them to use in my
house! :)
Even more lastly than the last, there are currently *NO* headphones in
the station, since they were both broken, so if you use headphones for
your show, please remember to bring your own!
I will be fixing up at least two sets to have there permanently, but I
don't have a lot of spare time right now; hopefully soon but can't
promise when.
Cheers, Wink
On Sun, Feb 21, 2010 at 10:06 AM, Mike Jedlicka <mikejedlicka@xxxxxxxxx> wrote:
> Wink and I went out last night to fix the main board because it
> totally crapped out on us yesterday morning. Sorry to the Sat djs
> that had to have their show canceled, but there's good news! One of
> the conductors had to be re-soldered, but we couldn't find the main
> problem. Just before we threw in the towel, we saw one of the power
> source batteries were completely out of the socket, so we plugged it
> back in and TA DA ... it fixed it! Damn thing sounds better than it
> has for a while.
>
> But there are some power issues still, making a little bit of a hum.
> Wink suggested getting better power strips that have multiple
> protections on them, so we're going to put in an order to get that
> going.
>
> So things sound good at PRA now, which is great!! Seriously thank
> Wink, I definitely couldn't have done it without his help.
>
> Enjoy!!
>
>
> Mike
>
> PS and do the Sat djs that had to cancel your show, do feel free to
> take an open slot this week if you'd like to make up your show, just
> email me if you're planning on it ...
>
>
--
Cheers, Wink
--
WinkJunior@xxxxxxxxx
http://sound-o-mat.com/~winkjr
http://soundcloud.com/wink-junior
http://soundcloud.com/wink-jr-radio
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