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Part Sourcing Assistance/Advice Thread


n_maher

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Most of them don't seem to want to deal with small quantities, and if they do, the price is insane (~$500 for 1 piece, Toroid Inc.). I checked Bridgeport Magnetics, I think they aren't interested in 1-2 pieces. Others won't sell to individuals, only businesses. I'm guessing Plitron is in that boat as well, or would be insanely priced. Antek doesn't do custom, so it looks like I may wind up with 3 Antek transformers for this project. I think that is who Kevin is using as well, but I'll let him pipe up if he wants to.

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Thanks for the info!

Yes I used Toroid Inc once a few years back and I think it was very pricy for what I asked for - I think their one-off pricing is based on designing and making initial prototypes for businesses, which is understandable.

I been using Antek whenever something off-the-shelf fits the need, unfortunately just not for a T2.

Guess I will reach out to toroidy and mueller-rondo in EU for a quote then.

Tricky part is I already got the chassis and I think Kevin designed them for the SumR ones originally where the diameter of each trafo can't really exceed 3.6", probably pretty marginal for their ratings and I'd need to spec that too, this might further reduce my options. (no lundahl, EI, C core etc..)

btw I contacted Toroidy once for something else and I got the impression that they don't have 115V or dual primary winding trafos in stock in general.

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Toroidy will do whatever you need in my experience (including dual primary); anything T2 will be custom spec anyway.  

Mueller-Rondo lets you specify the exact diameter when you place an order, so that's quite helpful.

The larger Mueller-Rondo (think 300VA) have a bit more mechnical hum than the corresponding Toroidy's (have built T2 psus with trafos from both). Not a dealbreaker if you're not sitting absolutely next to the psu box. Also, if you go with 3 trafos (I think that's what's in Kevin's original chassis?) I think if you spread the load none of them needs to be more than 150VA each, which should sort that problem.      

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2 hours ago, audiostar said:

Anyone knows of a metric panel bearing like this one from Keystone? 

Need it for a 6mm rod instead of 1/4". Small difference but enough for a 6mm rod to wobble in the Keystone 1705.

Not what you asked for, but might be an alternative solution

https://www.amazon.com/uxcell-Aluminum-Coupling-Flexible-Connector/dp/B07G6PQS5V/ref=asc_df_B07G6PQS5V/?tag=hyprod-20&linkCode=df0&hvadid=633248879226&hvpos=&hvnetw=g&hvrand=10924512438477359103&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9003244&hvtargid=pla-1890454766543&psc=1

 

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ONSemi. Abandon all hope for the next production batches. Mouser says "758 Expected 12-Dec-23", but that alas for the hated semiconductor supplier, can usually be taken with sizeable a pinch of salt.

Farnell says 249 will be delivered to them on 26th Jan 24.

RS says 21st Feb 24

See what I mean about pinch of salt? Stock, when ONSemi finally supply a few thousand will disappear pretty darned quick as manufacturers hoover up stock for their production.

Manufactured in China, like just about every semiconductor I've bought in recent times.

Edited by Craig Sawyers
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18 hours ago, dsavitsk said:

Thanks.
Need either to change the rod to 6.35mm (1/4") diameter or the panel bearing to 6mm. Can't find a 1/4" rod around either... 

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On 2/25/2023 at 1:50 AM, jamesmking said:

FQPF8N80C is still available from radio spares: https://uk.rs-online.com/web/p/mosfets/1454316 and https://uk.rs-online.com/web/p/mosfets/6715326 and https://uk.rs-online.com/web/p/mosfets/6715326P

KSC5027 might be an alternative to KSC5026 in the longer term - different package TO-220, higher current and wattage BUT different pinout

 

Wanted to buy some FQPF8N80C seems uk rs-online only let me enter UK address, is there a way to get them ship worldwide?

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That does not appear to be the same switch - the C&K is rated at 5A, not 6A, and the writing for the ON / ON is orientated differently. I have been able to find plenty of 5A rated switches, but no 6A.

 

Edited by bdinnev
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Found the rs export site here: https://export.rsdelivers.com/?fromAmericas=1

But when I enter US as the destination country they redirect me to the US site with "Due to local tax laws we request that you place your order with our US website". dk why this is so difficult in 2023¬†ūüėÉ

btw I was told bdent is going to close down in Oct, so maybe last call for something.

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1 hour ago, jokerman777 said:

Found the rs export site here: https://export.rsdelivers.com/?fromAmericas=1

But when I enter US as the destination country they redirect me to the US site with "Due to local tax laws we request that you place your order with our US website". dk why this is so difficult in 2023¬†ūüėÉ

btw I was told bdent is going to close down in Oct, so maybe last call for something.

What?!!! No more BD?

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18 minutes ago, Pars said:

What?!!! No more BD?

That's what I was told by Bud when I contact them to buy something yesterday. Possibly if you want something in large quantity you can reach out and maybe get a discount over the listed price.

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