[AMPS] Re: filter caps

[km1h@juno.com]

I had some E-Mail problems so if this is a dupe pse excuse.


On Fri, 18 Dec 1998 00:35:18 -0500 km1h@juno.com writes:
>
>
>On Thu, 17 Dec 1998 14:52:37 -0500 "Dick Hanson" <k5and@prestige.net> 
>writes:
>>Howdy.....
>>Let me apologize in advance for taking space away from 73 and furby 
>>related
>>c____. This note is for folks who still build things......like power
>>supplies. All Electronics has an ad in this month's issue of QST for 
>
>>new
>>Nichicon electrolytics, 470mf @ 450V, 105 degree C, for $3 each or 10 
>
>>for
>>$22.50. I think that's a pretty good deal and thought some of you 
>>might have
>>an interest. See page 144 of Jan. QST. I am in no way connected to 
>>that
>>company......just passing on info.
>>Dick Hanson....K5AND   EM74
>>7540 Williamsberg Dr.
>>Cumming, Ga.  30041
>>
>>770-844-7002
>

This was a prior response to Doug over on another reflector.


>I noticed your msg over on AMPS but didnt respond cuz QST had not 
>arrived yet.
>
>Anyway I would like to warn anyone contemplating a PS build or 
>repair....be very careful about capacitor specs. I have no idea what 
>the ESR ratings of the advertised Nichicon are but experience has 
>steered me away from ANY import that does not at least equal the CDE 
>381LX series specs. The CDE are designed ( and USA built) for high 
>ripple current switching supplies and are quite adequate in many ham 
>supplies including the hard service voltage doublers common in many 
>amps. Sold at Mouser for decent prices.
>
>Nichicon is a fine company and built the caps for Heath, Dentron and 
>others for years before getting out of that particular market.  The 
>advent of high power switching supplies has now brought about a whole 
>new generation of quality electrolytics BUT you have to be able to 
>distinguish the difference from standard consumer grade versions.
>
>When in doubt the Computer Grade types ( Mallory CGS series, etc) are 
>always safe to use.
>
>73  Carl  KM1H
>Amplifier Repairs and 6M Conversions our Speciality
>National Radio 1963-69

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