Alps attenuators

[Miniwatt]

I've been searching, but I can't find it anymore. Somewhere someone warned for Alps stepped attenuators, they would be fake, as Alps would never have made such things.

I bought one of those so my question is: have I been ripped off?

(I haven't had the chance to use them and hear for myself)

[kmtang]

I believe you bought them from E-bay. They are the one with axial leads resistors on it.

If they cost for $20 or less, surely they are fake ones.


Johnny

[jacco vermeulen]

The real stepped Alps, the RK50.
$800 retail in Europe, +3 months order time..

www3.alps.co.jp/WebObjects/catalog.woa/PDF/E/Potentiometer/MetalShaft/RK501/RK501.PDF

[staggerlee]

Vishay Dale 23 Step Attenuator 100K 12ax7 Potentiometer

[dr._sleep]

I bought this item about 14 months ago. I thought it was very nice and a quality construction for $58+.

installed in a headphoone amp

dr._sleep

[Shoog]

I have a pair of mono Alps stepped attenuators (33K),they came out of a Pioneer PA amp, so they certainly do make them.

Shoog

[Miniwatt]

And now I've done some Googling

It looks like they're fake, but not necessarily bad:

http://www6.head-fi.org/forums/showt...threadid=11704

They look like this one, but thatperson is talking about a potentiometer, not an attenuator..

http://www.angela.com/catalog/potent...Alps_Pots.html

Well, I guess I'll just try it, and compare, and then we'll see

[jacco vermeulen]

Like this :
http://cgi.ebay.com/Blue-Valvet-resi...QQcmdZViewItem

[Ciscokid]

Hi,

I too used the blue alps form HK. They worked ok for a while, then started having various problems. On one of mine, one of the sides started dropping out the audio from about position 9:00 until 12:00

All four alp blues that I had purchased came from a Hong Kong ebay seller. All had intermitted popping sounds when changing volume. I finally solved that issued by taking the grid to ground with a 10k resister.

I have since replaced my blues with blacks and really like the sound.

Here is a picture of one blue and one black alps: A blue and black ALPS. Just click the NEXT button to see other pics.

Pardon my site, it is very much under construction and I have not added much text to pictures.

Hope this helps.
ck

[kmtang]

I bought two of them and I thought they are good. Very unfortunately, I found that the design of it is really BAD!!!!!!!!

First I had in installed in my line amp and it sound a little bright. Then, I tested them by feeding a 10kHz squarewave and measured the output with an oscilloscope. I noticed that there are very high spike appears at the rising and falling edges. This happens the worst at lower volume position.

After investigating it for sometimes, I found that the spikes were caused by coupling inside the switch itself.

I e-mailed the seller but he didn't give me any answer to the problem.

My advise is :- Don't buy those unless you see the test reports.


Johnny