Quad 405: dud electros ?
 

Hi to all the Quad fans,

I have been refurbishing a circa 1977, Quad 405 that has been long out of
use.

The dark red, PCB electros were found to have all completely failed - the
47 uF and 100uF ones on the amp PCBs tested virtually open circuit. The
10uF, 40 volt bi-polar ones on the triac PCB had depolarised, becoming caps
of about 65 uF and only a few volts.

All the caps are unusual in that they appear to be *hermetically sealed* in
hard plastic cases with epoxy filling around the leads. I have seen the
same caps fail the same way in old 405s before.

Any info on these caps ( maker ?) or comments ?





........ Phil

Quad 405: dud electros ?
 

"Phil Allison" wrote in message
...
:
: Hi to all the Quad fans,
:
: I have been refurbishing a circa 1977, Quad 405 that has
been long out of
: use.
:
: The dark red, PCB electros were found to have all
completely failed - the
: 47 uF and 100uF ones on the amp PCBs tested virtually open
circuit. The
: 10uF, 40 volt bi-polar ones on the triac PCB had
depolarised, becoming caps
: of about 65 uF and only a few volts.
:
: All the caps are unusual in that they appear to be
*hermetically sealed* in
: hard plastic cases with epoxy filling around the leads. I
have seen the
: same caps fail the same way in old 405s before.
:
: Any info on these caps ( maker ?) or comments ?
:
:
:
:
:
: ....... Phil
:
:
:
Hey Toaster Boy, keep your grubby little fingers out of it!
Remember what happened the last time you went poking around
inside some Quad gear?

Some good advice - take it to a professional that knows what
he is doing. What about your pals TW or PT?

TT

Quad 405: dud electros ?
 

"TT" wrote in message
...

"Phil Allison" wrote in message
...
:
: Hi to all the Quad fans,
:
: I have been refurbishing a circa 1977, Quad 405 that has
been long out of
: use.
:
: The dark red, PCB electros were found to have all
completely failed - the
: 47 uF and 100uF ones on the amp PCBs tested virtually open
circuit. The
: 10uF, 40 volt bi-polar ones on the triac PCB had
depolarised, becoming caps
: of about 65 uF and only a few volts.
:
: All the caps are unusual in that they appear to be
*hermetically sealed* in
: hard plastic cases with epoxy filling around the leads. I
have seen the
: same caps fail the same way in old 405s before.
:
: Any info on these caps ( maker ?) or comments ?
:
:
:
:
:
: ....... Phil
:
:
:
Hey Toaster Boy, keep your grubby little fingers out of it!
Remember what happened the last time you went poking around
inside some Quad gear?

Yeah, didn't that screwdriver short something out in the power supply of one
of the Quad ESL63s then something went poof and a small puff of smoke
drifted slowly towards the ceiling? The poor ESL, didn't sound the same
since. :-(


Some good advice - take it to a professional that knows what
he is doing.

Yes, agreed.
I wonder if that lovely lesbian couple with the two kids and the tarted up
disco speakers that are planning to buy Flat 6 will ever need their toaster
fixed?
http://www.ljhooker.com.au/property_...pe=residential


What about your pals TW or PT?

Hey, steady on. You might end up opening old wounds here.
AFAIK neither TW or PT would consider themselves "pals" of PA.
Besides, PA doesn't have any pals - well none he's prepared to name. :P


TT

Cheers,
Alan

Quad 405: dud electros ?
 

"Alan Rutlidge" wrote
in message
...
:
: "TT" wrote in message
: ...
:
: "Phil Allison" wrote in message
: ...
: :
: : Hi to all the Quad fans,
: :
: : I have been refurbishing a circa 1977, Quad 405 that
has
: been long out of
: : use.
: :
: : The dark red, PCB electros were found to have all
: completely failed - the
: : 47 uF and 100uF ones on the amp PCBs tested virtually
open
: circuit. The
: : 10uF, 40 volt bi-polar ones on the triac PCB had
: depolarised, becoming caps
: : of about 65 uF and only a few volts.
: :
: : All the caps are unusual in that they appear to be
: *hermetically sealed* in
: : hard plastic cases with epoxy filling around the
leads. I
: have seen the
: : same caps fail the same way in old 405s before.
: :
: : Any info on these caps ( maker ?) or comments ?
: :
: :
: :
: :
: :
: : ....... Phil
: :
: :
: :
: Hey Toaster Boy, keep your grubby little fingers out of
it!
: Remember what happened the last time you went poking
around
: inside some Quad gear?
:
: Yeah, didn't that screwdriver short something out in the
power supply of one
: of the Quad ESL63s then something went poof and a small
puff of smoke
: drifted slowly towards the ceiling? The poor ESL, didn't
sound the same
: since. :-(
:
:
: Some good advice - take it to a professional that knows
what
: he is doing.
:
: Yes, agreed.
: I wonder if that lovely lesbian couple with the two kids
and the tarted up
: disco speakers that are planning to buy Flat 6 will ever
need their toaster
: fixed?
:
http://www.ljhooker.com.au/property_...pe=residential
:
:
: What about your pals TW or PT?
:
: Hey, steady on. You might end up opening old wounds here.
: AFAIK neither TW or PT would consider themselves "pals" of
PA.
: Besides, PA doesn't have any pals - well none he's
prepared to name. :P
:
:
: TT
:
: Cheers,
: Alan
:
What is really funny here is that even the Great Andre Juice
(pal and confidante of Phil) hasn't vomited forth any of his
"pearls of wisdom". Lovers tiff perhaps? ;-)

Seriously now, since Philthy has already insulted everyone
here (and elsewhere for that matter) that are likely to be
of any assistance it is amazing that he expects them to help
him now! Geeeeezzzz! His hide must be thicker than his
skull ;-)

Cheers TT

Quad 405: dud electros ?
 

"TT" wrote in message
...

"Alan Rutlidge" wrote
in message
...
:
: "TT" wrote in message
: ...
:
: "Phil Allison" wrote in message
: ...
: :
: : Hi to all the Quad fans,
: :
: : I have been refurbishing a circa 1977, Quad 405 that
has
: been long out of
: : use.
: :
: : The dark red, PCB electros were found to have all
: completely failed - the
: : 47 uF and 100uF ones on the amp PCBs tested virtually
open
: circuit. The
: : 10uF, 40 volt bi-polar ones on the triac PCB had
: depolarised, becoming caps
: : of about 65 uF and only a few volts.
: :
: : All the caps are unusual in that they appear to be
: *hermetically sealed* in
: : hard plastic cases with epoxy filling around the
leads. I
: have seen the
: : same caps fail the same way in old 405s before.
: :
: : Any info on these caps ( maker ?) or comments ?
: :
: :
: :
: :
: :
: : ....... Phil
: :
: :
: :
: Hey Toaster Boy, keep your grubby little fingers out of
it!
: Remember what happened the last time you went poking
around
: inside some Quad gear?
:
: Yeah, didn't that screwdriver short something out in the
power supply of one
: of the Quad ESL63s then something went poof and a small
puff of smoke
: drifted slowly towards the ceiling? The poor ESL, didn't
sound the same
: since. :-(
:
:
: Some good advice - take it to a professional that knows
what
: he is doing.
:
: Yes, agreed.
: I wonder if that lovely lesbian couple with the two kids
and the tarted up
: disco speakers that are planning to buy Flat 6 will ever
need their toaster
: fixed?
:
http://www.ljhooker.com.au/property_...pe=residential
:
:
: What about your pals TW or PT?
:
: Hey, steady on. You might end up opening old wounds here.
: AFAIK neither TW or PT would consider themselves "pals" of
PA.
: Besides, PA doesn't have any pals - well none he's
prepared to name. :P
:
:
: TT
:
: Cheers,
: Alan
:
What is really funny here is that even the Great Andre Juice
(pal and confidante of Phil) hasn't vomited forth any of his
"pearls of wisdom". Lovers tiff perhaps? ;-)

Seriously now, since Philthy has already insulted everyone
here (and elsewhere for that matter) that are likely to be
of any assistance it is amazing that he expects them to help
him now! Geeeeezzzz! His hide must be thicker than his
skull ;-)

Cheers TT


I believe Phil has been very considerate of everyone on the groups of late.
I think it is only fair that he be now given the same consideration that
everyone expects for themselves when communicating on usernet. I think
baiting should stop.

Quad 405: dud electros ?
 

"APR" wrote in message
...
: :
:
: I believe Phil has been very considerate of everyone on
the groups of late.
: I think it is only fair that he be now given the same
consideration that
: everyone expects for themselves when communicating on
usernet. I think
: baiting should stop.
:
As much as I respect your opinion I would suggest you do a
search on his name here to prove otherwise. Put it this, if
you can prove within the last fourteen days he hasn't sworn
or abused anyone I will apologise to you and him. And since
we are discussing "baiting" how about the numerous posts he
has made maligning me and others e.g his incessant
"Warnings" on aus.hi-fi

BTW As far as " Phil has been very considerate of everyone
on the groups of late" what's that saying about Leopards and
spots? ;-)

Cheers TT

Quad 405: dud electros ?
 

TT wrote:

Seriously now, since Philthy has already insulted everyone
here (and elsewhere for that matter) that are likely to be
of any assistance it is amazing that he expects them to help
him now! Geeeeezzzz! His hide must be thicker than his skull ;-)

I would offer to help if I had ever seen the inside of a 405.
I enjoy Phil's antipodean charm, even when pointed in my direction.
I guess Trevor Wilson would advise that the LM301 is nothing but
a distortion generator and should be replaced by a 5532, and to increase
the psu caps to 0.5F. Jute would recommend reducing the capacitance to stop
the sound becoming sluggish. I don't believe that anything wonderful happens
when Z1Z3=Z2Z4 because at audio frequencies you are multiplying zero by
infinity to get any number you want.

Plenty of advice, circuit diagrams and capacitor kits at http://www.quad405.com

--
Eiron

No good deed ever goes unpunished.

Quad 405: dud electros ?
 

"Eiron"

I would offer to help if I had ever seen the inside of a 405.


** Dear friend - a treat awaits you.


I enjoy Phil's antipodean charm, even when pointed in my direction.


** Must be some kind of weird pommy masochist.



I guess Trevor Wilson would advise that the LM301 is nothing but
a distortion generator and should be replaced by a 5532, and to increase
the psu caps to 0.5F. Jute would recommend reducing the capacitance to
stop
the sound becoming sluggish.


** The justifiably famous Quad 405 needs no snake-oil mods whatever.

Early examples simply need their small electros replacing - as it seems
Quad were royally dudded by the Dumbkoph Krauts at Roederstein who supplied
allegedly "sealed, long life caps" that were anything but !!



I don't believe that anything wonderful happens
when Z1Z3=Z2Z4 because at audio frequencies you are multiplying zero by
infinity to get any number you want.


** Completely off with the fairies stuff.


Plenty of advice, circuit diagrams and capacitor kits at
http://www.quad405.com


** All of it snake oil inspired ********.





......... Phil

Quad 405: dud electros ?
 

"Eiron" wrote in message
...
: TT wrote:
:
: Seriously now, since Philthy has already insulted
everyone
: here (and elsewhere for that matter) that are likely to
be
: of any assistance it is amazing that he expects them to
help
: him now! Geeeeezzzz! His hide must be thicker than his
skull ;-)
:
: I would offer to help if I had ever seen the inside of a
405.
: I enjoy Phil's antipodean charm, even when pointed in my
direction.
: I guess Trevor Wilson would advise that the LM301 is
nothing but
: a distortion generator and should be replaced by a 5532,
and to increase
: the psu caps to 0.5F. Jute would recommend reducing the
capacitance to stop
: the sound becoming sluggish. I don't believe that anything
wonderful happens
: when Z1Z3=Z2Z4 because at audio frequencies you are
multiplying zero by
: infinity to get any number you want.
:
: Plenty of advice, circuit diagrams and capacitor kits at
http://www.quad405.com
:
: --
: Eiron
:
What you refer to as "antipodean charm" others who have had
this "charm" inflicted on them over the years (like me)
would call his usual antics on Usenet abuse, net stalking
and slander. Just to name a few ;-)

Cheers TT

Quad 405: dud electros ?
 

"TT" wrote in message
...

"APR" wrote in message
...
: :
:
: I believe Phil has been very considerate of everyone on
the groups of late.
: I think it is only fair that he be now given the same
consideration that
: everyone expects for themselves when communicating on
usernet. I think
: baiting should stop.
:
As much as I respect your opinion I would suggest you do a
search on his name here to prove otherwise. Put it this, if
you can prove within the last fourteen days he hasn't sworn
or abused anyone I will apologise to you and him. And since
we are discussing "baiting" how about the numerous posts he
has made maligning me and others e.g his incessant
"Warnings" on aus.hi-fi

BTW As far as " Phil has been very considerate of everyone
on the groups of late" what's that saying about Leopards and
spots? ;-)

Cheers TT

Hi TT,
I don't have to do a search, he has given me a bit of a pizzling once or
twice and I do tend to lurk a bit.

I figure Phil as being one of the most knowledgable electronics people on
the groups and I do have respect for his electronics knowledge. I have seen
language from him in the past that I think made you blush, but what the
heck. His posts of late have been demonstrating a willingness to try to be
helpful to those he can help and I give him respect for that.