Author Topic: Any experience/caveats with Ali-Baba  (Read 534 times)

Ekimneets

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Any experience/caveats with Ali-Baba
« on: October 26, 2018, 09:47:35 PM »
So, I still canít source the 2/2.5ka 16mm pots that I need. Am desperate and looking over at Ali-Baba.

Is this a bad idea or does anyone have some caveats?

-Mike
Legion of one at Black Octopus Pedalworx.

alanp

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Re: Any experience/caveats with Ali-Baba
« Reply #1 on: October 26, 2018, 09:58:42 PM »
IIRC, Ali-Baba is the Chinese equivalent of Ebay, or Amazon. It's a marketplace provider, with lots of little vendors selling through it. Some vendors are good, some are mediocre, others are rip-off merchants.
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mjg

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Re: Any experience/caveats with Ali-Baba
« Reply #2 on: October 26, 2018, 10:57:51 PM »
If you join up they will give you a free $10 to start with.  But you can only spend it $4 at a time, and only on purchases over a certain amount.  So don't assume you will get that on your first purchase.

From memory, the price didn't include tax until checkout.  That may vary depending on your country. 

Other than that, seems to be much like eBay, as Alan says.  Sometimes good, sometimes bad. 

Ekimneets

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Re: Any experience/caveats with Ali-Baba
« Reply #3 on: October 26, 2018, 11:32:21 PM »
Thanks guys, Iím not used to having this much trouble sourcing parts. Itís frustrating when you are up against a hard deadline.

-Mike


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mjg

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Re: Any experience/caveats with Ali-Baba
« Reply #4 on: October 26, 2018, 11:43:48 PM »
Depending on how many legs of the pot you need, could you use a 5k linear with 5k resistor across the pins, as that tends to behave similar to a 2.5kA. 

Will depend on the circuit, but might be an option if you have a spare 5kB pot.

Ekimneets

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Any experience/caveats with Ali-Baba
« Reply #5 on: October 27, 2018, 12:11:56 AM »
Sorry took so long to reply Iíve just finished digging through every last pot that I have and I swear I have everything but. However I can order those without a problem.

I am bollicks at reading schematics but I think these were the two relevant sections.





I am in absolute babe in the woods when it comes to doing anything itís not strictly run-of-the-mill. Would you mind walking me through it?

-Mike


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alanp

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Re: Any experience/caveats with Ali-Baba
« Reply #6 on: October 27, 2018, 12:30:36 AM »
Remember, Mike, pots are basically only resistors, and thus must bow to Ohm's Law.

http://www.geofex.com/article_folders/potsecrets/potscret.htm
https://www.diystompboxes.com/analogalchemy/emh/emh.html

The last link will show calculators for putting resistors in parallel with pots, to give just the right resistance you need for the pot, and the taper. This also works with dual gang.
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Ekimneets

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Re: Any experience/caveats with Ali-Baba
« Reply #7 on: October 27, 2018, 01:07:51 AM »
Yes, how soon I forget even the basics. Youíre the best alanp!

Help me teach myself.

-M


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Legion of one at Black Octopus Pedalworx.