[Amps] Ten Tec Titan Power Supply

[Vic Rosenthal]

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 at 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
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