[TowerTalk] Ferrites 31 vs. 77 material

[David Gilbert]

I find that kind of China bashing pretty funny.  Ridiculous as a 
generalization.

I worked for a large semiconductor manufacturer for over thirty years 
and we ended up putting a joint venture manufacturing operation in China 
... not simply for low cost, but also to be able to serve the Asian 
market better and to be able to head off future tariff concerns within 
China.  We spec'd our own equipment, we trained all the operators, and 
we put our own managers in key positions.  Most of those positions are 
now staffed by locals.  The resulting quality was literally 
best-in-class on a world basis. MANY other U.S., European, and even 
Japanese companies have done exactly the same, and nothing says that 
Fair-Rite hasn't as well.

It is certainly true that many of the smaller locally owned companies in 
China have sloppy process and quality control, but companies like the 
large subcontract outfits in China put equivalent U.S. manufacturing to 
shame for overall manufacturing excellence.

In the case of ferrites, the problem is the inherent variability of the 
process itself and the problem previously existed wherever the ferrites 
were previously manufactured ... including here in the U.S.  Why you 
think the variability was less before the manufacturing went to China is 
beyond me.  Several of us here have already explained that it wasn't.

Dave   AB7E



On 11/2/2019 10:18 AM, Jim Thomson wrote:
> Date: Sat, 2 Nov 2019 13:25:19 +0000 (UTC)
> From: Roger Parsons <ve3zi at yahoo.com>
> To: "Tower and HF Antenna Construction Topics."
> <towertalk at contesting.com>, "jim at audiosystemsgroup.com"
> <jim at audiosystemsgroup.com>
> Subject: [TowerTalk] Ferrites 31 vs. 77 material
>
> <Very funny.
> <The posts from both N6RK and AB7E support my statement that variability in ferrite parameters has been known for a very long time. You're the one who asserted that it has just been discovered and that therefore Steve G3TXQ could not have known about it.
>
> <73 RogerVE3ZI
>
> ##  I  believe it  was  N3RR  that  bought  700,   (seven  hundred)   type  31  cores  from  one  supplier,  all  from  the  same  lot number..2 years  ago.  He  used  a  simple  1 turn  link to test them..and then  graded them.  They were all  over the  map,  + and – 22%.   Thats a whopping  44%   spread.  No  2 ferrites  the  same!     ALL  made  in China......so what do  you expect ?  So  much  for  fairite moving  their  factory  to  China.   QC  down  the  tubes  ever  since.
>
> Jim   VE7RF
>
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