Digest for sci.electronics.repair@googlegroups.com - 11 updates in 3 topics

thekmanrocks@gmail.com: May 21 12:29PM -0700

Radio shack, discounting now
that they're closing lots of stores.
 
Spending any more than $10
for a 6' stereo RCA pair is
snake oil.
avagadro7@gmail.com: May 21 03:54PM -0700


> Spending any more than $10
> for a 6' stereo RCA pair is
> snake oil.
 
need plugs only
 
there's a Shack en route....
 
bought a nice set from Sonix with the live vinyl feel runs 12' from dash to amp on van portion wall ....worth every dollar.
ohger1s@gmail.com: May 21 05:23PM -0700


> Spending any more than $10
> for a 6' stereo RCA pair is
> snake oil.
 
 
 
Maybe.. Spending $9.95 for wires that are more vinyl than copper is a crime..
 
I like to use old beat up LL audio cables as donors for fine wire to repair traces on printed circuits, and you wouldn't believe the big, heavy cables I've stripped back just to find a few strands of wire inside.
John Robertson <spam@flippers.com>: May 21 11:18PM -0700


> Spending any more than $10
> for a 6' stereo RCA pair is
> snake oil.
 
No, not really. It does matter - outside of audio phool overpriced stuff
that is.
 
I have used a number of different RCA style plugs and jacks (gold and
tin plated, etc.) and there is certainly a quality difference that shows
up in compromising environments. My usage is in an unheated building
where light beam operated targets use RCA plugs to connect to their
control boxes. The original 1970s RCA plugs had longer center pins and a
sturdier socket than the ones I can find easily at Rat Shack and other
discount junk suppliers. I go to industrial places like Digi-Key to get
the quality and weather resistance I need.
 
I hate having to replace plugs/sockets after four or five years because
I cheaped out when I repaired it previously...
 
John :-#(#
 
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
ohger1s@gmail.com: May 22 04:28AM -0700

On Monday, May 22, 2017 at 2:18:29 AM UTC-4, John Robertson wrote:
I go to industrial places like Digi-Key to get
> the quality and weather resistance I need.
 
It's been years but in the old days I would use copper RG58 or 59 with all metal RCAs. Those would last forever. You could hang clothes on them and not worry about breaks.
thekmanrocks@gmail.com: May 22 04:42AM -0700

John Robertson:
 
Ok. I understand your point about
durability over time I was referring to
those mfgs of audio cables making
claims that their wires will 'improve'
the sound over average cables.
In THIS respect, spending $30 for
1m RCA interconnects is pure
robbery.
John Robertson <spam@flippers.com>: May 21 11:10PM -0700

On 2017/05/21 2:20 AM, MJC wrote:
> remember (creeping senescence) or retrieve what that cure was...
 
> Can anyone give me a nudge, please?
 
> Mike.
 
Not knowing what your Usenet reader is or your feed I can only tell you
that when I used Thunderbird 52.1.1 (64-bit) on my MacBook Pro running
OSX 10.10.5 and pulling in Usenet from Giganews it is extremely easy to
add alt.computers (or any of the sub-groups) to my email/usenet list.
 
There is not a lot of chatter on a.c, a few posts a day it appears -
routers and IP cameras being the most recent chatter.
 
John :-#)#
 
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Mike Coon <gravity@mjcoon.plus.com>: May 22 09:13AM +0100

In article <fNudnbTL_aZJHb_EnZ2dnUU7-IWdnZ2d@giganews.com>,
spam@flippers.com says...
 
> There is not a lot of chatter on a.c, a few posts a day it appears -
> routers and IP cameras being the most recent chatter.
 
> John :-#)#
 
Thanks John, and I too am sometimes guilty of not reading the subject
line in conjunction with the body to get the full message (that is where
I specified my newsreader). And the "newsgroup pane" displays the
number of un-read threads that should show up in the threads pane, so I
know that alt.computer (singular) should not be empty!
 
I am writing this in Gravity, which I have removed and re-installed; it
seems to be only my latest subscribed NG (a.c) that is giving me
trouble...
 
Mike.
Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: May 22 06:22AM +1000

On 21/05/2017 9:54 PM, Phil Allison wrote:
> with the nearby " Larke Hoskins " car dealership.
 
> When asked, Gordon strenuously denied any connection.
 
> Are you saying he lied ?
 
**Oh yeah. He was, indeed, the 'Hoskins' part of Larke-Hoskins.
 
 
--
Trevor Wilson
www.rageaudio.com.au
Phil Allison <pallison49@gmail.com>: May 21 05:26PM -0700

Trevor Wilson wrote:

------------------
 
> > Are you saying he lied ?
 
> **Oh yeah. He was, indeed, the 'Hoskins' part of Larke-Hoskins.
 
** I know the question was put directly to him by Roger Tonkin.
 
Wonder why he denied it??
 
Natural instinct to lie?
 
 
 
.... Phil
Phil Allison <pallison49@gmail.com>: May 22 12:22AM -0700

Phil Allison wrote:
 
---------------------
 
> WES does not stock the 080G but has the uprated 083G which appears to be pin compatible.
 
> Can it be a drop in replacement?
 
> Any mods needed ?
 
** New Sanyo STK083Gs are now installed and working fine.
 
The old, blown modules were an STK080G and an STK084G - the latter having its white markings obliterated. I cut them both open for a look revealing all the chips inside. The output devices in the 080G are puny, similar to TIP34s while the ones in the 084s are larger, more like 2N3055 ones.
 
But this is not the problem.
 
The problem is that there is simply NO current limiting at all - making the modules fail instantly if there is a short on the speaker line.
 
ALSO there is a thin, phenolic PCB *between* the thick copper headers used for the output devices and the alloy heatsink on the back of each module. The temperature drop across this would be many times that of the usual mica or silicone insulators.
 
PLUS there are no emitter ballast resistors employed at all - making the output stage prone to thermal runaway.
 
I intend to write a stern warning to the owner to be VERY careful with the speaker wiring from this unit and to NEVER use 4 ohm speakers.
 
 
 
 
.... Phil
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