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THERE STILL SEEMS TO BE ISSUES WITH THIS AMP

Sonar

Sonar

Sr. Member
Apr 8, 2016
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Even though it's been "refurbished", and ready to be sent back to the owner, I think there's issues that weren't addressed. If they were they certainly weren't done to a high standard (IMO.)
I admit to knowing very little about how an amp (or any equipment) should be working before it goes back to a customer, but if this 220 were mine I wouldn't be happy.
200+ watts drive? Does the fact that it's been mono banded make those drive recommendations realistic? Meter, and fan not 100%. I'm sure there's other thing going on here that I am not knowledgeable enough to see. I'm hoping others will weigh in and tell me what other problems this amp either has, or soon will once the owner begins using it.
 

LeapFrog said:
I think maybe it was usps who dropped it, and down a flight of stairs lol?
Click to expand...
Very possible. But my questions were as to the repair/restoration aspects.
The clip is of the amp supposedly finished, and ready to be shipped back to the owner.
Yet there seemed to be an issue with one of it's meters.
And the fan at slow RPM is clanking.
There are other things that leed me to believe this 220 wasn't repaired to an acceptable level.
I would think that making a clip of a restored repaired piece of equipment shouldn't be showing things are already beginning to fail during the making of a clip that purportedly shows a repaired restored amplifier. I'm still confused about the 220 Watts Drive recommendations made by the restorer.
I don't know if it's true, but to my knowledge the 220's recommended Drive is 80 - 100 Watts. Is the fact that it was modified to work on 10/11 meters by replacing or modifying the tank coil change the drive wattage to double+ of what it would be if the tank coil allowed for 10 through 80 meters operation?
2500 watt seems accessible for two z500's. I didn't know the rated dissipation for those tubes were over 1200 watts each, but then again I could be wrong. And even if they are rated for that type of output one would assume you would
see that output with the manufacturer's recommended input. I'm assuming if I drove my 4 watt Phantom with 50 Watts I'd probably see 1500 watts out of it. BUT NOT FOR LONG! That leads me to believe that 225 Watts is overdriving the amplifier,
I hate to say that it looks like a shotty job because my knowledge is so limited. On the other hand I have learned a lot whilst being a member of this site, and this amplifier seems like it won't be long until it's back on that bench once again. I could learn so much by this one clip if others with the knowledge will post the issues they see while watching this clip. I have a feeling there are so many more things wrong with this amplifier then a fan that clanks, a meter that seemed to stop working then fixed on the Fly, and the input output power shown on that bird . 73
 
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The SB 220 is *NOT* safe to ship, unless it will be riding in the trunk or back seat of your car for the whole trip.

The aluminum chassis does not have the rigidity or structural strength to withstand normal (drop-kick) stresses from modern-day shipping methods.

When Heath was selling the factory-assembled version, it arrived in three cartons. One with the amplifier, another with the tubes, and a third one with the HV transformer. It plugged in, and you bolted it down to the chassis.

This model was NEVER shipped from the factory with that transformer in place.

I have seen the chassis deck dished in, smashing the circuit breakers or even severed along the flange that bolts to the rear panel.

Compare the construction to an amplifier built to be shipped in one piece, like a Henry. Requires a chassis a quarter-inch thick. The SB220 is closer to 1/16 inch.

Some folks get away with it. And some folks score big at the local casino.

73
 
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Sonar
Do not believe everything you see on U tube.
Especially if it was filmed in Idaho.
 
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Sonar said:
Very possible. But my questions were as to the repair/restoration aspects.
The clip is of the amp supposedly finished, and ready to be shipped back to the owner.
Yet there seemed to be an issue with one of it's meters.
And the fan at slow RPM is clanking.
Click to expand...
I know it would not have left my shop in that condition. The fan mount must be bent pretty badly. I was not slow, I was meticulous in my work. It takes time if you do it right.
 

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