Re: Tek 465 Negative 8 volt rail issues
Thanks Paul!toggle quoted messageShow quoted text
I see I've scored. I'm going to have to pick your brain on this subject. That is, take advantage of the accumulated wealth of knowledge of the community. You guys are great.
I want to keep this conversation on the forum for the time being as the first thing I've been doing so far is searching and review threads with regards to 465 power caps. It's paying big dividends so far. But it is challenging to peruse the vast results. I'll do a search for adapter boards as this is the first I've heard of it, and am kind of liking the idea. The 465 PS Cap Replacement Guide is good, but I'd like to implement it a little neater. That's no dig against the original writer. We're all indebted for the shared experience. So hopefully my experiences and this conversation can contribute to the knowledge base.
I'm a little on the fence about the wholesale replacement of the original caps, but then I'm an ignorant newb. I hear your point about prophylactic replacement. I'll have to dwell on it for my own comfort. Also know that I replaced C1419/C1418 with new Nichicon ULD 60v caps, so I'm not a original preservationist. I guess I want to strike a balance between need and the risks and efforts of wholesale replacement. I suspect the adapter boards are constructed for replacement of all 5 big caps. I do like the assurance that new over-spec'ed caps provide.
As I say, I'll do some research, but if you have particular advice for adapter boards I'd love to hear from you.
On Thursday, December 24, 2020, 10:41:39 AM PST, Paul Amaranth <firstname.lastname@example.org> wrote:
These caps dry out all the time, it's a very common problem.
The orginal cans are no longer available and, if you find some NOS
ones, they will probably dry out shortly if not already.
Get 105C snap caps and use one of the adapter board floating around to
match the footprint to the 4 terminal footprint of the original. Use
high quality caps by Nichicon, Panasonic, etc. Avoid cheap noname or
offbrand Chinese caps.
All 3 ground leads need to be jumpered since Tek used the can as a
jumper and the adapter boards take care of that for you. The adapter
boards make for a very professional repair. I hate seeing caps hanging
off the board hot glued to something.
If I have to replace one, I generally replace all of them. Then you
won't have to worry about it for 20 years.
By using very long leads on the adapter boards I have replaced the
caps in situ without pulling the main board by threading them down from
Unsoldering the main caps is fun, not. It's easy to overheat the board
and have trace separation. Be careful and use good desoldering tools
and technique for that. Some chipquick wouldn't hurt.
On Thu, Dec 24, 2020 at 05:59:34PM +0000, Dave Peterson via groups.io wrote:
Ed, how serendipitous.--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@AuroraGrp.Com | Unix/Linux - We don't do windows