mhardy6647
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KT120s.Four KT88's for just 15W?
KT120s.Four KT88's for just 15W?
I don't see enough circuitry in this amp to do that, so what we're left with is a 15 watt amplifier, right?You'd need the audio signal to ride on a high frequency carrier wave of some sort, then the size of the required transformer drops substantially.
The only way I'm aware of involves modulating a high frequency carrier wave.
I take @Jim Clark 's comments here seriously, and IMHO there's a distinct possibility that these are "amp camp" DIY-assembled units as Jim has hypothesized.
That said, I do think @paulbottlehead should amend the original post (with the help of admins if it can no longer be edited by a regular user) to include a brief note (and maybe a permalink to Jim Clark's first comment in the thread) clarifying that there is some question about the provenance of these units. When the provenance gets sorted out, the OP could again be revised to set the record straight, whatever the outcome.
That would still leave the OP and the entire thread up and open in the meantime, allowing full, open discussion of this matter, while avoiding giving the impression that these are 100% definitely production/warrantied units.
Just my $.02.
What about the provenance of the dealer unit? Is that in question too? And hasn't Jim Clark confirmed that these 15W transformers are original equipment? If you want the mods to revise the OP's post, please include this info as well.
I can only speak for myself. If I were a dealer who felt that an error had been made, I would do the following:My first priority is to sort out this warranty issue if there is one. If those amps are in fact production units under warranty (doubtful imho), and the testing was done properly, than those units need factory service ASAP.. A poor performing product under warranty, is not acceptable to Bob Carver, and must be serviced or replaced right away. The OP needs to provide this info.. Lets see the serial numbers. If they were purchased from Jim Clark Stereo, we can track them to the original owner. If they were purchased at another authorized Bob Carver dealer, like Music Direct, I'm still willing to submit the service claim for the owners. This is the quality of service I've come to expect from Bob Carver.. A product in the field not meeting specs, would be totally unacceptable to the factory, quality control, the dealers and especially Bob Carver himself most of all.. Let see the serial numbers and get these amps working properly, assuming the testing of the OP was proper for the design..If they are factory units out of spec, lets take care of the customers first. The OP can retry later.
I'm tempted to buy one & have it shipped to you -- but Mrs. H might keeeeeel me.If anyone in the Northeast has one and wants it measured, my lab is open.
It would need to be detected, wouldn't it? Or would this be like the ultrasonic AC bias applied to a tape recording signal to get the record head(s) into a sweet spot for linearity without audible effect (well... except sometimes, when and if the bias signal beats with the 19 kHz FM stereo pilot signal and makes 'birdies')?You'd need the audio signal to ride on a high frequency carrier wave of some sort, then the size of the required transformer drops substantially.
The only way I'm aware of involves modulating a high frequency carrier wave.
I was thinking about making the same offer for anyone in the Austin area. But really, anyone who has one of these only needs to weigh it. If it's 19 lbs., it won't perform as claimed.If anyone in the Northeast has one and wants it measured, my lab is open.
A dealer guessing this and that is not data. He hasn't provided any information contrary to OP's measurements. As I noted, if the company has measurements otherwise, let's see it. As is, he is making an argument which fits with thread of discussion that interested parties can read.That said, I do think @paulbottlehead should amend the original post (with the help of admins if it can no longer be edited by a regular user) to include a brief note (and maybe a permalink to Jim Clark's first comment in the thread) clarifying that there is some question about the provenance of these units. When the provenance gets sorted out, the OP could again be revised to set the record straight, whatever the outcome.
Agree, If those are Carverfest amps, they will not have any serial number tags. I'm just asking for a picture. All my Bob Carver amps come with a money back guarantee, its been this way for years. Unfortunately they have been out of stock for a couple months now. The factory S/N tags look like this.I can only speak for myself. If I were a dealer who felt that an error had been made, I would do the following:
1. Immediately provide the serial number information required to diffentiate the DIY amps from production versions, instead of just asking the OP to provide the numbers of his with nothing to verify them against.
2.Take the OP up on his offer to buy a production unit with a money-back guarantee, and ship one out FedEx on Monday morning.
Ah, OK. If you stated that before, I overlooked it.Agree, If those are Carverfest amps, they will not have any serial number tags.
I can see why.In the process of attempting to buy one of these new from a different dealer, I have been advised that these are discontinued and NLA.
One thing seems clear regardless of if they're factory or not; they're using a 15 watt output transformer in a '75 watt' amplifier. Not a good look.So if these don't have serial numbers, do we feel confident these were not factory-produced models? Or does the possible adhesive area from a possible serial number plate that might have been removed cast doubt?
I understand that even if these were DIY kits that does not necessarily mean these measurements are invalid for the production models. But we here at ASR do value precision of information, yes?