i have looked the amp over pretty good and they are the only damaged components I could identify by eye. Does a wire wound resistor have a solid core? When you squeeze the damaged ones they kind of feel like a spring with
a canvas covering. The one that still looks good feels kind of solid.
On further inspection, the amp says on front, Sound, Model 4000, a product of sound musical insruments, N.Y.(New York) All the info I have read on them say they are of Italian origin.
The picture I posted came from an Ebay auction and the amp was listed as a tube amp, but it is the same front panel. I wonder if they had anything to do with Heil Sound.
I do believe it is a transformerless power supply, the filter capacitors are the biggest I have seen in any amp. They are the size of a can capacitor, about 75mm to 100mm long and 40mm in diameter. (I hope I am doing my metric conversions about right, I am doing them out of my head and dont normanlly work with metric) but they are only one capacitor each. Past these filter capacitors I have located the diodes in the bridge rectifier and another diode, may be for bias circuit, past those are the burnt components in question along with two electolytic 250 volt and I am not sure of the capacitance value cause all it says on them is 35, I will replace them along with the ones in question.
Also the amp gives off a slight shock to the touch when turned on so I have to look for an ungrounded ? condition before I kill myself. I have to go into my amp repair book and find the test for this.
Channel one hardly works, Channel two works with lots of distortion. When the amp is turned on and nothing plugged in, all pots down, there is a very loud steady hum that does not sound like 60 cycle.
I would really like to fix this without a tech. I have been trying to do this for years as you might be able to tell from my scanty knowledge. I do have Jack Darrs guitar amplifier repair handbook which goes into great detail. I have the meters which I know how to use and own a sillyscope that I don't know how to use.
I have an old fender Bassman in line for work, and then the rarest preamp ever, noone has ever heard of it, an old Teisco stereo, all tube, two channel guitar preamp with reverb, tremolo, low, mid, high. It is really the coolest thing and the cats meow.
I just love this stuff and gots to learn it even if it kills me
PS, I don't have a digital camera, actually, I don't have any camera, why? I guess cause I can't play music on them so I won't buy one!