VintageKustom.com - RDF feed
http://www.vintagekustom.com/FUDforum/index.php
input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19893&th=3560#msg_19893
alligator2014-01-03T16:38:50-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19899&th=3560#msg_19899
chicagobill2014-01-04T18:29:47-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19903&th=3560#msg_19903
Thanks much for any help you can offer ]]>alligator2014-01-05T13:36:54-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19925&th=3560#msg_19925
stevem2014-01-06T13:20:13-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19943&th=3560#msg_19943
alligator2014-01-07T23:10:23-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19949&th=3560#msg_19949
As I recall it runs on plus and minus power rails like the 540, but I am not sure what it's can handle for peak power supply voltage.
This is a much newer type chip and can likely still be had, I will check my catalog tonite and reply tomorrow.]]>stevem2014-01-08T13:05:15-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19960&th=3560#msg_19960
In the past I have used the NE540 chip as a direct replacement in the Challenger amps, even though they are rated for a lower voltage. I have always used a fairly large heatsink to help keep the chip cool.
If you want to try the NE540, they are available on eBay all the time as NOS parts. They are pretty pricey, but if you need one, then you have no other choice.
Are you certain that the chip is bad?]]>chicagobill2014-01-08T22:50:28-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19962&th=3560#msg_19962
pleat]]>pleat2014-01-09T02:57:28-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19965&th=3560#msg_19965
In one of the his response letters to the sender they discuss the repair of a challenger with a bad 540 and part of the fix for that blown chip is a diode that Bob says to add in the circuit to protect that chip, but he does not spell out where it goes.
I can only assume it's added to block voltage transient spikes?]]>stevem2014-01-09T13:28:56-00:00Re: input chip
http://www.vintagekustom.com/FUDforum/index.phpindex.php?t=rview&goto=19994&th=3560#msg_19994
alligator2014-01-11T00:48:39-00:00