[Elecraft] OT: Astron linear PS regulation issues

[Bill Johnson]

How old is your PS?

73,
Bill
K9YEQ

https://wrj-tech.com/

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Fred Jensen
Sent: Monday, February 25, 2019 4:52 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] OT: Astron linear PS regulation issues

I've given up on Astron despite the fact that many people say they never have troubles.  Apparently, Astron does not have a supplier for inside star washers for screw/bolt connectors, I've found almost crumbly, crystallized cold solder joints on the point-to-point wiring terminals [in one case, it wasn't soldered at all], and often the case is not bonded well [or at all] due to paint and/or no star washers.  These are all basic steps in quality electronic construction, there's just no excuse for it.

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 2/25/2019 2:26 PM, Rose wrote:
> I've found instances of regulation failures caused by loose hardware.  
> In particular the nuts atop the filter caps that hold the regulator PC 
> board loosen and simply tightening then will cure the issue.  This 
> appears to be caused by compression of the PC board material …"cold 
> flow" to some readers.
>
> There are several other common failures of this series of PS's, but 
> this one is perhaps the most prevalent.
>
> While you have the cover off, check for paint under the lug on the 
> green power cord wire …
>
> 73!
>
> Len Kopp- K0PP
>

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