You are here

Boss 9v psu question

For all things relating to guitars, basses, amps, pedals & accessories.

Boss 9v psu question

Postby Dr R » Fri Sep 07, 2018 10:19 pm

Really quick question:
I have just bought a Boss TU-88 tuner/metronome/mini monitor for practising with. It runs of 9v battery or a 9v Boss psu. Annoyingly it doesn't say what the current draw is, or whether the centre is negative or positive. I have googled it, but not found any specs.

Does anyone know? I have half a dozen spare psus, hopefully one will work.

Thanks as always, Rich
User avatar
Dr R
Posts: 276
Joined: Mon Jun 21, 2010 12:00 am
Location: Solihull, West Midlands, UK
My ambition: To one day have enough experience to answer technical questions on the SOS forums, as well as asking them 

Re: Boss 9v psu question

Postby Wonks » Fri Sep 07, 2018 10:51 pm

Boss are always centre negative. Current draw is 30mA.
User avatar
Jedi Poster
Posts: 9735
Joined: Thu May 29, 2003 12:00 am
Location: Reading, UK
Correcting mistakes on the internet since 1853

Re: Boss 9v psu question

Postby ef37a » Sat Sep 08, 2018 7:48 am

Wonks wrote:Boss are always centre negative. Current draw is 30mA.

"I love it when a plan...."

Nice one Wonks.

Jedi Poster
Posts: 10707
Joined: Mon May 29, 2006 12:00 am
Location: northampton uk

Re: Boss 9v psu question

Postby Sam Spoons » Sun Sep 09, 2018 5:42 pm

Did this work on the same principle as, when needing to know the time during the early hours, sticking a drum out of the window and banging it with enthusiasm? Somebody is bound to shout "who the hell is banging a (insert choice of expletive here) drum at 2 o'clock in the morning?

I'll get me coat
User avatar
Sam Spoons
Jedi Poster
Posts: 10330
Joined: Thu Jan 23, 2003 1:00 am
Location: Manchester UK
Finally taking this recording lark seriously (and recording my Gypsy Jazz CD)........

Who is online

Users browsing this forum: No registered users