[Harp-L] Re: Kinder AFB batteries

[Joe <abcdeasy@xxxxxxxxx>]

 I would expect any gig worthy device in that price range to come with
the ability to use external power regardless of how long the batteries
will last.

On Jul 23, 1:04 pm, "John Balding" <John.Bald...@xxxxxxxxxxxxxxxx>
wrote:
> John wrote:
>
> The thing to consider about "converting" a Kinder AFB+ to be
> used with wall warts/adapters is the amp draw of the AFB+. 9-volt
> adapters
> can put out 9-volts at a very low amp rating. They can also put out
> quite a
> bit of juice at a higher rating (usually stated in milliamps). This is
> why
> you can't (shouldn't) hook up the adapter from your brand X delay pedal
> to
> your brand Y reverb pedal; even if the polarity and jack size is the
> same."
>
> Paul wrote:
>
> I think the danger implied in your post is highly overstated. If the
> adapter type is correct (AC or DC) and the voltage is correct, the
> chance of damage is virtually nil.  There is a common misconception that
> a high-current adapter will "blow out" a small device. This is not so. A
> device will only draw as much current as it needs.
>
> >>>Perhaps I wasn't clear in my post. I never said that too high an amp
>
> rating would damage the unit; merely that unless you know for sure what
> the amp draw of the AFB+ is, you shouldn't improvise an adapter for it.
> A car battery is capable of supplying several hundred amps. The dome
> light in a car is not rated at several hundred amps. It pulls what it
> needs. Likewise, a Bassman may pull 2A, but we plug them into 20A
> outlets every day. The purpose of my illustration with the delay/reverb
> pedals was to point out that different units with the same
> polarity/voltage requirements do not always have the same current
> requirements and that it is not always safe to swap adapters
> willy-nilly. Some circuits can handle a significant mismatch. Some
> can't. If the tone of my post was taken as "too high an adapter output
> might damage the circuit", then I wish to correct that
> misunderstanding.<<<
>
> Paul wrote:
>
> I realize your post was well-intended, but the fact is, a 9-volt
> adapter,
> properly polarized, is a very good solution to powering the device. I
> base
> this statement on 30 years of electronics education, development,
> design,
> and building experience.
>
> >>>I agree completely. I know you were merely trying to state a viable
>
> answer to a posed question, but the real question in my mind is: Do we
> really need a "solution" to powering the unit? John Kinder designed the
> AFB+ as a no-nonsense, lightweight, compact, highly portable device that
> eliminates feedback. And that's exactly what it is. If you have to
> change the batteries every six months, so what? On a crowded stage, the
> last thing I want to do is try to locate not one, but two
> wall-wart-sized outlets on a power strip.<<<
>
> John Balding
> Tallahassee, FL
>
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