Old Marantz receiver make popping and hissing sounds no matter what

It's fixable - get it to a shop that knows these things. Likely it's only doing it on one channel, and this in turn would most likely be a noisy transistor - they had a few problems with those, like 2SC458 and 2SC1213 and the like. Can also be caused by a bad coupling capacitor, or if it's making the static on both channels, could be an arcing power switch - although this would cause interference on nearby AM radios and cause the dial lights to flash and dim.

Mark Z.

I had an intermittent problem exactly like this on an old Wards receiver, problem turned out to be a bad mosfet transistor in the preamp section. Since mine was intermittent I was able to track it down with some freeze spray.

**The lack of actual information you've provided is simply breath-taking. At a very minimum, here's what you need to supply:

Model Number If the fault is input dependent. If the fault is volume control level dependent. If the fault is tone control dependent. Does it occur after a period of time, or immediately? Etc.

--
Trevor Wilson
www.rageaudio.com.au

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All answers are 'no' and it is in one channel. model number #4415

The 4415 sounds like one of their smaller quad units, some of which used rather unusual driver IC's. I don't remember the part number, but I've got a few in a parts drawer at work. Can't say if thhis goes in yours, or if this is your problem.

Mark Z.

Question 4 is not a yes or no answer, is it?

g. At

You are correct, and thanks for keeping me on the path...

I will find a an old 8-track receiver to power my speakers...

g. At

I will use a set of these made in China for computer speaker needs. However, I will miss my last receiver ( the Marantz four channel) that has survived with me ( I am 48).

g. At

I did not mention or really notice that it was one channel doing the noise. Since you pointed out that attention to detail helps if posting to this forum, I paid attention and realized it is one of the two channels bothering me. So I disconnected that speaker and the noise is gone (along with stereo sound).

Thanks for pointing out the obvious, I have computer sound without that terrible noise.

Thanks to everyone who replied, I realized that I could use one channel for now. I do not want to get into replacing parts for now.