But if it turns out some are bad, replace ALL of them with 105c caps from a
reputable distributor, like Digikey or Mouser, etc. Old electrolytics can be
unreliable and a failure could damage the transformer. Also there are a lot of
fakes on eBay.
Of course you should check the diodes too.
Victor 4X6GP
> On 25 Mar 2020, at 0:16, Jim <jimw7ry@gmail.com> wrote:
>
> Agreed.
>
> Check out the caps.
>
>
> Thanks
> 73
> Jim W7RY
>
>> On 3/24/2020 4:46 PM, Jim Brown wrote:
>>> On 3/24/2020 2:33 PM, Ken Claerbout wrote:
>>> I have a Titan "Golden Series" amp and power supply here that I was
>>
>>> Does anyone have a schematic for this style power supply? I'm sure I
>>> can figure it out eventually, just hoping I might save some time if
>>> the schematic is available.
>>
>> Hi Ken. Two thoughts. First, the almost certain culprit is failure of one or
>> more of the big HV caps that are in series. Best test I know of is an
>> old-fashioned VOM, checking each cap individually with forward and reverse
>> measurement, noting the relative charge/discharge current. A good cap will
>> have a lot. They can remain in-circuit for the test.
>>
>> I've needed to do this for two of the three 425s I own. In both cases, I
>> only needed to replace one or two of the caps.
>>
>> Second, I'd be pretty surprised if the schematic differs a LOT from the
>> earlier version that's on my website. k9yc.com/publish.htm
>>
>> I suspect the failure is the result of the caps needing to be re-formed.
>> Other list members can provide better advice than I.
>>
>> 73, Jim K9YC
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|