General > General Technical Chat
What happend to 320K resistors ?
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daqq:
I'm not sure what the problem is - you were relying on a part that was fairly obscure even in its heyday. The market for obscure non-SMD resistor values is simply not that large and explains why it's no longer an option.

Several suggestions here solve your problem, all of which you have refused for silly reasons.

--- Quote ---I like being a hobbyist, not a professional.
With SMD you are no hobbyist i think.
--- End quote ---
Wrong.
bdunham7:

--- Quote from: Siwastaja on February 20, 2021, 07:15:51 am ---You need to realize TH technology is mostly obsolete, want it or not. So no matter how much you prefer TH over SMT, no matter how good reasons you have, the selection of parts available is poor and gets worse every day. You can whine about it until cows come home, or you can just use the parts that are available and get the job done. Side effects are almost all positive, but attitude needs to be fixed first.

--- End quote ---

Actually I'm continually amazed at what is available still.  In repairing stuff from 100 years old to 3 years old, I actually run into more obstacles with obsolete SMT parts than I do TH.  And in repair, I often have less flexibility, although I generally don't quibble about cost.  I can get brand new 12AU7 dual triodes from several manufacturers, but a relatively common MP2363DN buck converter is obsolete, although there are some still out there.  I'd have to stockpile them if I thought I would need more.


--- Quote ---Yes, I always try to default to full-SMT design whenever possible. The opposite, trying to default to THT, is becoming a masochistic act I think.

--- End quote ---

To a novice, TH might seem easier until they have to lay out a space-constrained board and they realize that a TH PDIP will obstruct all the layers of the board. 
Jan Audio:

--- Quote from: daqq on February 20, 2021, 03:35:04 pm ---Several suggestions here solve your problem, all of which you have refused for silly reasons.

--- End quote ---

The reason is i already have those parts.
Jan Audio:

--- Quote from: bdunham7 on February 20, 2021, 03:39:18 pm ---I'd have to stockpile them if I thought I would need more.

--- End quote ---

Stockpiling obsolete parts is a serious thing in this hobby, and you can make good money also if you buy enough.
bdunham7:

--- Quote from: Jan Audio on February 20, 2021, 03:56:06 pm ---The reason is i already have those parts.

--- End quote ---

What tolerance are your other parts?  It makes no sense to have this value at any tolerance greater than 1%. 

How many of these 6-bit DACs are you making that cost is such a concern? 
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