Boss PH-1r

[phx]

check check
:wink: :roll: :razz: :evil: :P 8-) :-( 8) :-? :???: :( :-D :stop: :dance:

[phx]

Zojuist een boss ph-1r gescoord. Ding is onwijs, way better dan de ph-2 en ph-3 (die zuigen toon).

Nu heb ik 1 probleempje, op batterij werkt-ie perfect. Zodra ik er een adapter aan hang, gaat het ledje bijna niet aan (knippert heel lichtjes). Ik heb 2 adapters geprobeerd, beide gestabiliseerd, 1000 mA en 9 volt.

Iemand een idee/tip? Die phaser MOET namelijk op mijn pedalboard verschijnen :wink: klinkt wicked naast mijn mxr phase 100 (bi-phase effect).

PHX

[zjanke]

Los contact? :-?

[Robbert]

Werkt die PH-1r niet met de oude ACA adapter (12 Volt wisselspanning, ipv 9v gelijk).

[Fuhgawz]

Van bossarea.com:

Specifications

* Controls: Rate, Resonance, Depth
* Connectors: Input, Output, AC Adaptor
* Current Draw: 11 mA (DC 9V)
* Weight: 400 g (.88 lbs)
* LFO Speed: 100 ms ~ 16 s
* Recommended AC Adaptor: ACA Series

[Antal]

Zojuist een boss ph-1r gescoord. Ding is onwijs, way better dan de ph-2 en ph-3 (die zuigen toon).

Die bypass' van boss berusten allemaal op hetzelfde princiepe. Daar is in de jaren volgens mij niets aan verandert. Wel typisch dat jij dan beweert dat de ene wel tonesuckt en de ander niet. Geef daar eens een verklaring voor?

[phx]

Idd, zojuist achtergekomen dat ik een aca adapter moet gaan scoren.

Antal: ik heb ze beiden gehoord, die ph2 bijv zuigt enorm tov de ph1. Kan gewoon gevoelsmatig zijn, maar met de ph1r alleen voor de amp (en uit) klinkt hetzelfde als zonder deze phaser. Nog nooit gehad met een ander pedaal.

[Lucluc]

Idd, zojuist achtergekomen dat ik een aca adapter moet gaan scoren

Is waarschijnlijk niet nodig als je meer pedalen gebruikt en een daisy chain. Ik heb zelf ook zo'n phaser gehad en die werkte prima in combinatie met andere pedalen op een gewone psa voeding.

Wat achtergrond:

What's the difference between ACA and PSA?
Powering pedals is a mystery, indeed. Something that works for one pedal might not work for the next, and while it's possible to understand and explain most of these irregularities, some just can't be explained...



Basics
There are three basic features of DC power adaptors that we need to keep track of: voltage, current and regulated/unregulated

A fresh 9v battery will provide about 9.6 volts when you measure it. This drops to about 9 volts as soon as it goes into a pedal which draws a little more current than the multimeter. This is because a battery is an unregulated source - as the current goes up, the voltage drops. There's a fixed amount of power built into the battery, so when a circuit asks for more current, it has no alternative than to drop the voltage.
A regulated adapter works from a far bigger power source, and can therefore keep the voltage constant, regardless of the current draw. But as the adapter itself is the limit, rather than the available power, it will burn out when asked to provide more current than it's rated for. Boss calls this type of adapter PSA.
An unregulated adapter works more like a battery - it will lower the voltage as the current rises, but not completely. Sooner or later it will burn out too, if the current draw exceeds the adapters' limit. Boss calls this type of adapter ACA.


Voltage history
A lot of the confusion seems to be about voltage - what should it be? Some say the ACA adapter is 9 volts, while others say it's 12 volts. And some ACA pedals work fine with 9 volts, while others barely light up at all. Let's take a look at the Boss history:

In 1978, they launched the Compact pedal line, and all the early products were small current consumers. The OD-1 draws about 4mA, and the CE-2 (introduced in 1979) draws about 8mA. For some reason (possibly to help the pedals sound as they were on batteries), Boss decided to run their adapters at 12 volts, and then use a resistor (usually 470 ohm) and a silicon diode inside the pedal to reduce the incoming voltage. I suspect that doing it that way helps keep the voltage more constant when more pedals are added to the chain - if it were 9 volts from the adapter, adding another pedal would drop the voltage too far. Or... the 12 volt adapter was the one they had around, so that was the one to be used.

In any case, as the pedal range grew, the current consumption of each new pedal grew as well. The larger current draw of the new pedals didn't fit the unregulated adapter system very weel, so Boss decided to start designing the new pedals to accept a regulated power source instead. And so the PSA adapter was born. As it was regulated, it didn't need the higher voltage/resistor combo, so it was decided that 9 volts would suffice.

For years, the 12 volt ACA and 9 volt PSA adapters lived side by side - until august 1997, when Boss made all their pedals compatible with the PSA adapter. Here's the source of the confusion, I think: in order to make the ACA pedals still in production compatible, the resistor had to be removed (along with other changes to keep the sound relatively the same). But Boss still recommend the ACA adapter for some of the current pedals... I strongly suspect (but I don't know this, as Boss are rather tight-lipped about these things) that they changed the spec on the ACA adapter too, so from 1997 onwards both adapters (PSA and ACA) are 9 volts. The only hint Boss gives is that the ACA adapter is now called ACA-120G - ACA-240G in Europe - and I'm rather sure the "G" wasn't there before. But I could be wrong... Someone with an old ACA adapter might be able to verify this, I suppose.

This leaves all of us with pre-1997 ACA pedals in a dilemma - we can't buy the proper adapter from Boss (as it will be the wrong voltage)... and running them on 9v regulated might not sound good. After all, you can't expect an overdrive to sound the same on less voltage. What to do?



The daisy chain thing
When powering a Boss ACA (old-style) pedal from a 9v PSA adapter, the LED barely lights up. This is normal and expected behaviour, since the 9 volts fed to the pedal really is too little - it wants 12 volts, remember? But when the power is being provided via a daisy-chain, with other PSA pedals in the chain, the LED suddenly lights up as normal... I investigated the issue, and sure enough, my CE-2 didn't want to work with the PSA adapter alone. When I added a daisy chain and connected a Blues Driver to it, there was no change - the CE-2's LED still wouldn't light up. But when I added a signal cable between the pedals, the thing shone as bright as ever! What happens is that all the pedals in the daisy chain share a common ground, which bypasses the voltage limiting components in the ACA pedal(s), causing the CE-2 (in this case) to receive the full 9 volts. Obviously, this won't work with an isolated power supply like the Voodoo Lab Pedal Power 2, since the isolated outputs prevent common grounds from forming. But it works with all non-isolated power supplies, and daisy chain cables.

To add another layer of confusion, I just recently came across a mid '80s CE-2 and an early Taiwan DS-1 (also mid '80s) that worked just fine straight from a 9 volt PSA adapter. I checked it out, to see if they had been modified, but it seems that they never had any of the voltage limiting components. There were no components missing, no wires moved - and still the pedals worked from a 9 volt supply...



From all this, we can deduct:

Three basic rules about Boss pedals (and one exception):
If it says "PSA" on the bottom, use a 9 volt regulated supply.
If it says "ACA" on the bottom, check if it's produced before or after 1997. The easiest way is to plug in the PSA adapter - if the LED lights up properly, it's most likely a post-1997 model, and will work with the regulated supply. It may still sound best from an ACA supply (9 volts, then), but the difference will be marginal at best. By the way, the only ACA pedals produced after 1997 are the SD-1, BF-2, GE-7, OC-2, DS-1, PH-2 and CS-3.
If it says "ACA" on the bottom, and the PSA adapter doesn't light up the LED properly (or the pedal isn't one of those listed above), it wants 12 volts unregulated power to work properly.
Unless... you are using a daisy chain. In that case, the pedal will work with 9 volts, as long as there's a 'proper' 9 volt pedal in the chain with it. Some 12 volt ACA pedals will therefore actually work fine, as long as they are being fed via a daisy chain...

[phx]

Bedankt voor de uitleg. Maar ik heb hem al gekoppeld aan een daisy chain: werkt niet! 9 volt geprobeerd, 12 volt allen 1000 mA (ligt het dus ook niet aan) met zo'n lekkere zware conventionele bloktrafo.

Baal er wel van, klinkt erg warm tov mijn andere phaser (mxr phase 100) ik dacht 2 phasers op elkaar te kunnen stapelen (alla Billy Corgan). Nou ja, ik blijf gewoon proberen de phaser via adapter te kunnen voeden.

[fullorder]

Bedankt voor de uitleg. Maar ik heb hem al gekoppeld aan een daisy chain: werkt niet! 9 volt geprobeerd, 12 volt allen 1000 mA (ligt het dus ook niet aan) met zo'n lekkere zware conventionele bloktrafo.

Baal er wel van, klinkt erg warm tov mijn andere phaser (mxr phase 100) ik dacht 2 phasers op elkaar te kunnen stapelen (alla Billy Corgan). Nou ja, ik blijf gewoon proberen de phaser via adapter te kunnen voeden.

ik hoop dat je 'm niet gesloopt hebt door 'm aan een DC voeding te hangen, terwijl ie misschien juist AC nodig heeft.

[fullorder]

Bedankt voor de uitleg. Maar ik heb hem al gekoppeld aan een daisy chain: werkt niet! 9 volt geprobeerd, 12 volt allen 1000 mA (ligt het dus ook niet aan) met zo'n lekkere zware conventionele bloktrafo.

Baal er wel van, klinkt erg warm tov mijn andere phaser (mxr phase 100) ik dacht 2 phasers op elkaar te kunnen stapelen (alla Billy Corgan). Nou ja, ik blijf gewoon proberen de phaser via adapter te kunnen voeden.

ik hoop dat je 'm niet gesloopt hebt door 'm aan een DC voeding te hangen, terwijl ie misschien juist AC nodig heeft.