[GreenKeys] Ruined? You decide....

[drlegendre .]

Incidentally.. while the under-chassis photo is a bit weak, the install of
the new boards appears to be quite workmanlike, and the general state of
lead dress is quite tidy.

Much, much worse could have been done, here. I'd not fault the previous
owner or tech.

On Sat, Jul 30, 2016 at 7:52 PM, drlegendre . <drlegendre at gmail.com> wrote:

> In that case, I can't really say anything too negative about this upgrade
> / rebuild strategy. Drop-in PCBs with various caps & parts are kind of the
> standard in the vintage gear world these days, look at the various boards
> for the Dynaco line, as an example.
>
> Yes, it does certainly interfere with the original aesthetics (assuming
> you are peeking +inside+ of the chassis). But all things considered, if
> this were my supply, I'd very much rather see a properly designed and
> executed drop-in PCB solution like this, than any ham-fisted amateur's
> kludgey attempts at a repair.
>
> I've become somewhat less of a purist as time wears on. Sometimes, the "so
> easy it works every time" route, is the most sensible route. And again, if
> original parts are preserved, it's really a moot point. If you're going to
> run the gear, then make sure that it holds together and some PSU failing
> doesn't kill an impossible part.. like a rare power xfmr, for instance. And
> if you don't plan to run it, then just shine it up and leave it the heck
> alone! The next guy will drool all over the originality..
>
> On Thu, Jul 28, 2016 at 10:48 PM, Jeffrey D Angus <jdangus at att.net> wrote:
>
>> On 7/28/2016 10:16 PM, drlegendre . wrote:
>>
>>> Other than the filter caps, what did the boards replace? At first look,
>>> this seems to be a decent set of drop-in components for someone who
>>> actually wants the thing to perform at peak, without playing with it for
>>> weeks.
>>>
>> The original supply had silicon rectifiers, but they and several resistors
>> were mounted on tag strips or the filer capacitors themselves.
>> The new parts are ALL on the two PC boards.
>>
>>> It appears that one or more rectifiers are present.. were the originals
>>> vacuum or solid-state (selenium)?
>>>
>> Silicon
>>
>>> In either case, how are the higher voltage levels dealt with?
>>>
>> No change actually.
>>
>>> Were the original parts saved, or discarded? I generally return old parts
>>> to the cust.. they look at me funny, but I explain that should they ever
>>> decide to sell it, the new buyer might be tickled pink to see them.
>>>
>> I give them to the customer, otherwise, *I* would end up with a 55
>> gallon drum full of old crap "I might need."
>>
>>
>> --
>> Jeff-1.0
>> wa6fwi
>> http://www.foxsmercantile.com
>>
>>
>
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