Thick Film Planar Cermet Resistors

[Mike Diack]

Does anyone know of a source (OTHER THAN RS & FARNELL) of 5 watt thick film
cermet planar resistors. I use a lot of 50R (47R ones would do) as they are
the archilles heel in C-Audio Pulse 1100 amplifiers (which feature
significantly in my workshop). Unfortunately due to these amps having been
dumped by Harman after their takeover of BSS, my OEM supply has dried up.
cheers
Mike

 

[Phil Allison]

"Mike Diack"

Does anyone know of a source (OTHER THAN RS & FARNELL) of 5 watt thick film
cermet planar resistors.

** Too expensive ?

Had a falling out with them ???

I use a lot of 50R (47R ones would do) as they are
the archilles heel in C-Audio Pulse 1100 amplifiers

** If they constantly fail - then use something BETTER !!!




............... Phil

 

[Mike Diack]

"Mike Diack"


** Too expensive ?

Had a falling out with them ???

I just prefer not to use them unless I have to.

** If they constantly fail - then use something BETTER !!!

Now there's some REALLY good advice - The resistors fail to protect the
IGBTs in the SMPSU when an output section fails in an amp (usually
because a newbie roadie at the local SR co loads them down to 2 ohms).
Putting in a beefier resistor would mean replacing IGBTs ($40 a pop)&
drivers, and probably blowing the tracks off the board (I know, i've
seen it when a dipstick tech did just this). Thanks heaps, Phil. cheers
Mike

 

[Phil Allison]

"Mike Diack"

"Phil Allison"


I just prefer not to use them unless I have to.

** How deeply mysterious ..........

Now there's some REALLY good advice - The resistors fail to protect the
IGBTs in the SMPSU when an output section fails in an amp

** Then why didn't you simply say they were "sacrificial" components
instead of using the title "archilles heel" which infers they are a weak
spot in the design.



(usually because a newbie roadie at the local SR co loads them down to 2
ohms).

Putting in a beefier resistor would mean replacing IGBTs ($40 a pop)&
drivers, and probably blowing the tracks off the board (I know, i've
seen it when a dipstick tech did just this). Thanks heaps, Phil. cheers
Mike

** What a mindless sheep shagger.

Baaaaaaaahahhhhhhhhhhhhhhhhh.




............. Phil

 

[John Smyth]

Does anyone know of a source (OTHER THAN RS & FARNELL) of 5 watt thick film
cermet planar resistors. I use a lot of 50R (47R ones would do) as they are
the archilles heel in C-Audio Pulse 1100 amplifiers (which feature
significantly in my workshop). Unfortunately due to these amps having been
dumped by Harman after their takeover of BSS, my OEM supply has dried up.
cheers
Mike

Suggest you have a look in the US eBay site www.ebay.com under electronic
components/resistors or whatever they call it.

There are heaps of people selling odd lots/ end of rolls there. Make sure
you go to the US site and not the Australian Site.
John