Could you dead bug a tcxo? Sent from my iPhone
> On Sep 27, 2021, at 7:48 PM, Forrest Christian (List Account) > <[email protected]> wrote: > > > I try hard not to do single-source items. And usually have qualified > multiple parts. > > The ones which are kicking my rear this year are the 25Mhz MEMS oscillators. > These are the standard clock oscillator for anything ethernet. I have a > specific size I use and also voltage, temperature, and ppm specs. > > This is of a part where mouser lists 118 potentially-compatible parts. Of > all of these 118 types, right now mouser has 1 in stock. As in 1 total > piece, not one type. Many of these have tens of thousands on order, but > with lead times into 2022 or sometimes 2023 at this point. > > I've qualified no less than 5 different oscillators this year for this part. > The problem has been how inconsistent the supply is. I finally figured out > how to use the (cancellable) scheduled delivery to take 10 in for > qualification, and schedule a few months months worth to come in 30 days or > so. And then scheduled reorders for at least a years worth of demand. But > even that bit me in the rear when mouser had to cancel the reorders on one > part due to lack of supply. > > The part I'm dealing with today has been one where we had a scheduled order > for, yet the due dates kept getting pushed out and out. The last note we > got was basically that the vendor could not provide an estimate at this time. > So I'm off finding another part. In this case, I've lucked out and what > used to be a single vendor type of part is now available from a couple of > other manufacturers in a form which has the same pinout but slightly > different specs (as in need a firmware update different specs). > > >> On Mon, Sep 27, 2021 at 5:49 PM Chuck McCown via AF <[email protected]> wrote: >> I try to have at least two sources for everything. But I don’t have for >> enclosures and din rail snaps. I did have to substitute two choke coils for >> a common mode double choke. I have seen some of my problem parts shipping >> now. Plastic sdr11 conduit seems to be coming down. Lumber prices are >> down. I am optimistic. But I normally am. >> >> Sent from my iPhone >> >> > On Sep 27, 2021, at 4:03 PM, Forrest Christian (List Account) >> > <[email protected]> wrote: >> > >> > >> > I'm getting really tired of dealing with supply chain issues. Like burnt >> > out, don't want to do this anymore, I've had enough tired. >> > >> > Just the things I'm dealing with today: >> > >> > The last few days, all of my spare time has been related to reviewing >> > options to replace a part which has become unobtainum. Like as in, >> > manufacturer has moved from a long lead time to 'don't bother asking'. >> > This seems to happen on a recurring basis now (with different parts) - >> > versus pre-covid it was maybe once every year or two (since I'm careful to >> > select parts to avoid this issue). I've had one part I've had to switch >> > vendors on like 6 times now. >> > >> > And it's not just parts, my enclosure manufacturer for the rackinjectors >> > sent us this gem today: >> > >> > "We had the enclosures ready for pickup since last week, but our road is >> > under maintenance and the whole street got ripped off. My forklift is not >> > able to get off from our driveway to the road because the step is very >> > steep. I heard the city will start paving tomorrow. Hopefully we can load >> > the pallet by Wednesday." >> > >> > Can we please go back to the way it was in 2019 sometime soon? >> > >> > -- >> > - Forrest >> > -- >> > AF mailing list >> > [email protected] >> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > -- > - Forrest
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