Bourns Filters for SE/30 - where to buy?

[SEthirty]

Yeah, it would be kinda logical to have a limit.

I order quite regularly op-amps from National, for my high-quality CD-player (yeah, I'm kinda audiophile )

They ship up to 5 types of things per week, at a maximum quantity of 5 per type.

That is really nice of them, because now I can try lots of different op-amps, so I can determine which one sounds the best in my design :beige:

For the ones who are interested : it currently is the LM6172, originally a video-op-amp.

It really would cost me a lot of money to buy them all, and maybe use them once or twice, if them don't sound nice.

But, please, don't over-use this !

 

[techknight]

speaking of audiophile, ive fixed quite a bit of CD players in my time.

I had to take 2 CD-701ES models and make 1 good one. the servo amplifier IC was shorted in 1 which burned the entire laser pickup unit, melted it down.

The second one had a bad photodiode assembly. So i had to take the 2 optical pickups apart and swap the good pieces around between them to make one good pickup assembly.

Then that brought one of them back to life.

 

[SEthirty]

Ah, the old Sony's... :lol:

There were a couple of models in the ES-series that had indeed problems with an IC (I haven't got an idea which one it was), which ran way to hot, which caused all kinds of weird problems.

I'm more a "Philips-guy", I own several nice Philipses, like the CD880, and a mint CD303.

Quite worth a bit these days, especially in mint-condition.

Those early CDM0/CDM1-transports were really superb, with real glass lenses, magnetic laser movement, and all kinds of other of nice, durable things.

They don't make 'em anymore like that... :'(

Oh well, if the major brands still used those quality parts in their products the economy would fall in no time, because the stuff just wont die ! :lol:

Anyways, enough about audio, let's stay on-topic.

 

[techknight]

ive worked on a couple philips units. i forget what was wrong with them. One of them used a radial swing based pickup assembly.

 

[SEthirty]

Ah, there we go again... :lol:

You worked then on quite recent models, because all the older Philips CD-players had the nice magnetic swing-arm mechanisms.

The newer CDM12 & 14 were (and are) a lot worse, they already give problems if you only look at them }

Oh well, at least they are a lot cheaper, so it won't hurt your wallet so much if you need to replace them.

Component level repairs are really a no-go with their flimsy PCB's.

 

[techknight]

thats what i said, magnetic radial based swing type mechanism. I managed to fix all the ones i ran across, except a denon which used a philips mechanism, which was slightly newer, still radial based, but it used a motor instead of a magnet/voice coil assembly.

 

[Mk.558]

Has anybody got theirs yet?

Mine needs one right away, or something like that. Letting it sit for a week or two made it a very unhappy Mac. Just gives me the irregular "raster" image, no chime or nothing.

Same thing? I wonder what is the difference between the ND and the regular version. Octapart lists the L and the LF versions: A+ for telling us the difference.

 

[JDW]

I've been waiting to hear back from TechKnight about that. So far he hasn't mentioned anything, so I must assume he never got free samples. So much for parts suppliers being honest about "free samples"!

 

[Mk.558]

Well I will have to get two, a spare for my spare motherboard.

If you want me to look into shipping some o'der, hit me up in a couple of weeks.

 

[JDW]

TechKnight currently is working on two of my dead SE/30 boards which I could not repair. He thought the problem on one of the boards to be the BOURNS but later found (after he removed and destroyed that BOURNS) that it was a different problem. That board has been repaired but it won't work without a new BOURNS. And for TechKnight's trouble, I wanted to buy him some spares. But the only seller I could find who has them in stock wants a ridiculous sum for a transaction fee. I then was advised about "free samples" so I submitted a request on behalf of TechKnight, and even one of the salespeople from BOURNS contacted him, but apparently they don't have any in stock (they merely told him they would check).

And so, we are left with going back to that seller with the big transaction/handling fee. But if more of us could pool our needs together, we could buy a lot more chips, and in that case the handling fee wouldn't be as expensive. The shipping fee is nothing compared to that stupid handling fee!

 

[techknight]

Well the bourns was bad. for sure. BUT. it wasnt causing simasimac. The other board I narrowed down to either a bad GLU or bad FPU, the overlay is never flipped, but ROM CS is active. I would like to find a battery destroyed/exploded board so i can make 1 from 2. I am probably going to run it on the IR machine most likely, pull the CPU/FPU/GLU and put a socket in the CPU. They are on ebay i believe.

 

[JDW]

Should we start a new thread to gather interest in pooling an order for BOURNs filters?

 

[trag]

Okay, I found my order of ten that I placed a couple of years ago. Apparently, my order from DFS was fulfilled by questcomp.com. I ordered a bunch of them. After they arrive, assuming that they don't discover that they don't exist, I'll put them on the list of parts with the capacitors. They'll be $2.50 each with a capacitor order, or $2.50 + $3 shipping if ordered alone. My usual terms for international shipping will apply (add international postage to what a USA customer would pay).

 

[Mk.558]

DigiKey on the first page says they need 500 to bother ordering any, and that's a lot for us. (Unless we sent out search drones to covertly cull every SE/30 alive on the planet in for Bourns network filter replacement...that is.) Entering in 500 returns a page that says you need 2000, with a lead time of about two months. (June 16th, estimated, from today.)

I did some more Google-Fu and turned up this.

It was mentioned that someone could have ordered some then, heck if they ordered 500 for us then, we'd be set! But the sentiment seems to be that you could just pluck one from a SE mobo. Or make your own, they aren't that hard, as seen here:

I'm thinking I could just make my own on a 20-pin DIP socket and some prototyping board.

EDIT: Word in that thread was that Quest Comp may have some. Their ordering system is borked, I'd rather call them.

EDIT2: I'd have to know the wattage rating of the resistors and the caps. That may actually be possibly done with SMD components to help keep the size down. Might be smart to put some kind of EMR shield or something.

 

[techknight]

I got the bourns from trag/JDW today. 6 of em.

 

[Mk.558]

I think I need two, one for sure. LocalTalk is spotty.

Probably best to use a 20 pin DIP socket rather than resoldering the filter right back in?

 

[JDW]

I got the bourns from trag/JDW today. 6 of em.

Yippee-kay-eh! :approve:

I think I need two, one for sure.

Trag has 4 more. PM him.

 

[Mk.558]

Excellent. We must be real team players here.

BTW. PM inbound.

 

[trag]

I see that my earlier message was a little unclear.

I meant:

1) I found my old order of ten from two years ago. On the package I found information implicating Questcomp.com.

2) The evening I posted my earlier message, I placed an order with Questcomp for a bunch more of the filters.

3) When that large order arrives, I will add them to my list of available parts http://68kmla.org/forums/viewtopic.php?p=167588#p167588 with the capacitors and other sundry.

However, that order has now arrived. I didn't mind fulfilling JDW's and MK.558's requests from my original ten, because by that time I had telephone comfirmation that my new order was being filled.

So, will now go add the Bourn filter to my list of parts. The price from now will be $3, rather than the $2.50 I wrote above. I apologize for the difference, but it was late when I posted the $2.50 and I miscalculated. (JDW, MK.558, no worries, you're grandfathered in. Plus the price was lower on the original ten.)

Wow, I just checked Gamba's old site. He was offering them for $1. They were a lot cheaper ten years ago. We should have stocked up then.

I think that I didn't get that original ten from DFS Sales. I think I probably ordered them directly from Questcomp and then forgot that I did. I had DFS bookmarked for so many years....

 

[JDW]

I'm mentally clicking "LIKE" on your your post, Trag!

That's great news indeed.