[Steve Eddy]

I assume it's safe to assume that still no attenuators have shown up anywhere?

k

 

[n_maher]

Correct, and my emails have not been responded to for over 2 weeks. Sad.

 

[Steve Eddy]

Quote:

Originally Posted by n_maher /img/forum/go_quote.gif Correct, and my emails have not been responded to for over 2 weeks. Sad.

More than sad. Didn't you say you'd ordered 20 of them? And I assume you paid for them?

I don't get it. I'm pretty sure those images aren't just computer generated renderings. Somebody went through some trouble to make those parts.

k

 

[32y0]

I emailed him and he is still taking orders, wich I find a little strange because nobody received the attenuators yet and he isn't responding to n_maher.
Also, the balanced attenuators look very different you than would expect from the pictures.

Responce to my email:

Thanks for interesting on my products.
The balanced (shunt and ladder) version is offered only with military Vishay/Dale RN55 resistors (see attached pics).

I accept paypal.

Best regards
Arek Kallas
High Quality Audio & Industrial Attenuators

With the following pictures:

 

[TwinFinnley]

Wow, that looks quite a bit different than the other ones shown on their website...

 

[les_garten]

Something Fishy in Denmark, errr Poland in this case....

 

[FallenAngel]

Hmm... well, if it's simply RN55 axial resistors, that's not too different from more "common" types. SMC 0.1% thin film resistors generally have lower noise and better tolerance, plus the lack of lead inductance.

Very bad that they're ignoring Nate, strongly recommend not ordering anything from them until they clear things up.

 

[Steve Eddy]

Quote:

Originally Posted by les_garten /img/forum/go_quote.gif Something Fishy in Denmark, errr Poland in this case....

Yeah.

He's yet to deliver what he was originally offering, and now he's got something completely different that he's selling?

Oh yeah, and he's accepting PayPal again?

k

 

[cobaltmute]

Quote:

Originally Posted by Koyaan I. Sqatsi /img/forum/go_quote.gif I don't get it. I'm pretty sure those images aren't just computer generated renderings. Somebody went through some trouble to make those parts. k

I may be wrong, but if this was a real picture, why would every resistor be the same? If there was only two resistors in the path, wouldn't some of these have to be different?

 

[rds]

^ I was thinking the same thing (especially since they're 100k), although I don't really know anything about these.

Anyways, whether or not these products actually exist, this is clearly a very shady "business".

 

[FallenAngel]

If it's a ladder type attenuator wouldn't the resistors to ground all be same?

 

[rds]

maybe, but if this attenuator (from gold point website) had all 100k ohm resistors, then its input impedance would be 100k ohm x 24 steps = 2.4M ohm
...doesn't seem right

EDIT also looking at this schematic, the image of Khozmo makes even less sense since on the Khozmo all the resistors are connected together on one end.

EDIT 2 ah, that's a series type. Haha oops, disregard the above

 

[Steve Eddy]

Quote:

Originally Posted by FallenAngel /img/forum/go_quote.gif If it's a ladder type attenuator wouldn't the resistors to ground all be same?

No.

k

 

[Steve Eddy]

Quote:

Originally Posted by cobaltmute /img/forum/go_quote.gif I may be wrong, but if this was a real picture, why would every resistor be the same? If there was only two resistors in the path, wouldn't some of these have to be different?

Yes, they would.

I've no explanation for why they're not.

k

 

[jnewman]

It makes perfect sense if you're looking at the ground leg deck of the attenuator at the full-attenuation end.

A ladder attenuator with 2dB steps starting at -60dB would have at least 10 resistors on the signal leg side that are equal to the nominal attenuator impedance. The photo has 10 visible resistor markings.

Example: I have one of the old 23-position Elna ladder attenuator switches. If I made a 100K attenuator, the signal leg resistor for -60dB, -55dB, -50dB, -45dB, and -40dB (positions 1-5, less control at the low end) would all be 100K resistors. The ground legs would be, respectively, 100 ohm, 180 ohm, 340 ohm, 560 ohm, and 1000 ohm. Yes, ideally the -40dB step would actually be 1000 ohm / 99K, but there is no 99K resistor in typical product lines. The closest value is still 100K. Next closest is 97.6K.

Values are generally the same regardless of order. You would expect 1K/100K at the -40dB step, and a 97.6K signal leg resistor for the next value, or the one after that. If using a resistor series with fewer standard values, you would get a few more steps with 100K signal leg resistors.