13 May
2020
13 May
'20
4:33 a.m.
Thanks for the offer, but I am in the UK. I have a few bits I need so I can order these
parts soon.
Regards
Rob
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Nigel Johnson via
cctalk
Sent: 13 May 2020 11:30
To: Rob Jarratt via cctalk <cctalk at classiccmp.org>
Subject: Re: Replacing Power LED on MicroVAX 3100/95 Power Supply
If all you need it that little mounting collet, I have a dozen or so of them
somewhere for the price of postage from Canada!
cheers,
Nigel
On 13/05/2020 02:23, Rob Jarratt via cctalk wrote:
--
Nigel Johnson
MSc., MIEEE, MCSE
VE3ID/G4AJQ/VA3MCU
Amateur Radio, the origin of the open-source concept!
You can reach me by voice on Skype: TILBURY2591
If time travel ever will be possible, it already is. Ask me again yesterday
This e-mail is not and cannot, by its nature, be confidential. En route from me
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Nigel Johnson <nw.johnson at ieee.org>
Please consider the environment when deciding if you really need to print this
message
That's fantastic Maciej! I often buy from
Farnell, so there is no
issue with getting those parts myself. When I have accumulated enough
wants to warrant an order I will get them.
Regards
Rob
still
> manufactured. I bought whatever was the minimum quantity sold by
> Farnell when I broke one along with the LED a few years ago. I still
> have a few available and I could post one set once I am back to my UK
> home (which is given the current situation regrettably not going to happen
anytime soon).
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Maciej W.
Rozycki
via cctalk
Sent: 13 May 2020 02:41
To: Peter Coghlan <cctalk at beyondthepale.ie>; General Discussion:
On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
Subject: Re: Replacing Power LED on MicroVAX 3100/95 Power Supply
On Sun, 10 May 2020, Peter Coghlan via cctalk wrote:
>> I seem to remember people saying it is quite difficult to replace
>> these, mainly because you can't get them out without breaking the
>> holder. Is that right? Has anyone done this successfully and have
>> any
tips?
Is this
the green LED in a H7821 PSU? I managed to get one out of
the holder with a bit of difficulty before I realised I could have
left it in place and the board can just about get past it when the
plug at the far end of the leads feeding it is plugged out from the board.
If
the holder is the same as with the H7826 PSU, then it's a
generic part > Otherwise you can order it yourself:
> <https://uk.farnell.com/broadcom-limited/hlmp-0103/mounting-clip-ring
> -
> 5mm-led/dp/8576378>.
>
>>> Are there any recommendations for a replacement? If I remember
>>> correctly the LEDs used in those days were not as bright as modern
>>> ones and a modern one would end up being much brighter because of
>>> the
> higher voltage maybe?
>> Maybe it would be possible to tack blobs of solder onto what's left
>> of the leads on the original and use them to attach fine leads,
>> digging out a small amount of the LED casing around the leads if
necessary?
I chose
an LED matching the original colour, also of the case, as
closely
as
possible:
<https://uk.farnell.com/vishay/tlhg5205/led-5mm-green/dp/1045482>,
but
still
haven't installed it (well, ahem, I need to
fix the PSU itself
first), so
I can't
comment on the result. I could post one of those
along with the
holder if needed (subject to the condition noted above).
An LED will dim with use, so you may not be able to closely match a
worn
one
> with a brand new part, but I suppose you don't actually need to be
> *that* exact with your equipment, do you? Otherwise you can always
> put a resistor in series to dim the light produced.
>
> HTH,
>
> Maciej