Here's an as-is clone of an audio note 300B interstage amp. It uses Electraprint interstage transformers. The opts are amorphous C core from surplus British cores on a copper frame--they are supposedly an improvement over the ones currently on that famous auction site. And you can see a difference in that the wire coming out of these are within some sort of cotton and wax casing. I don't remember where the guy who sold it to me said they were made. HV choke is vintage Freed or Collins and the Filament transformer is that huge thing on the left. RCAs are tiffany.
Also, this has coleman regulators and I located the DC supply for the regs remotely. There's a kluge on the back the route the power, but the wiring is nice (teflon). Lots of other goodies.
IMPORTANT: if you want the raw supply for the coleman regulators please add $100. This is in a sperate, very nice anodized Alu enclosure and is all pretty high end. If you want to rewire the amps for AC, the transformer is there, so it should be super simple. I used it on 104db efficient horns, so AC filaments were an issue.
It won't win you any beauty contests, but the iron alone is worth the asking price.
Also, I don't have any 300Bs to test this. It was working when I put it away, but this is strictly as is. That said, nothing looks amiss internally so...
To recap: $350 + shipping for the amp and you will either need raw supply for the coleman regs or you need to recreate the AC supply, for which there's already a filament transformer. $450 with the raw supply for the coleman regs. It weighs a ton, so shipping will be $$$, but I do have a fedex account and that helps.
Also, this has coleman regulators and I located the DC supply for the regs remotely. There's a kluge on the back the route the power, but the wiring is nice (teflon). Lots of other goodies.
IMPORTANT: if you want the raw supply for the coleman regulators please add $100. This is in a sperate, very nice anodized Alu enclosure and is all pretty high end. If you want to rewire the amps for AC, the transformer is there, so it should be super simple. I used it on 104db efficient horns, so AC filaments were an issue.
It won't win you any beauty contests, but the iron alone is worth the asking price.
Also, I don't have any 300Bs to test this. It was working when I put it away, but this is strictly as is. That said, nothing looks amiss internally so...
To recap: $350 + shipping for the amp and you will either need raw supply for the coleman regs or you need to recreate the AC supply, for which there's already a filament transformer. $450 with the raw supply for the coleman regs. It weighs a ton, so shipping will be $$$, but I do have a fedex account and that helps.
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One thing to add given some questions: this is an SE vs PSE version of the AN circuit. It also isn’t a perfect clone, although even some wiring recommendations are followed from AN. It’s just basically the same triode 6sh7 1:1 IT coupled to 300b with similar operating points
If I sent a PM yesterday but didn't post on here that I sent a PM, does that mean my offer is not valid?
Hi Duke58
Sent you a PM. It is yours, you are correct on the price in the PM and I still need to work out a time for meet up.
Max
Sent you a PM. It is yours, you are correct on the price in the PM and I still need to work out a time for meet up.
Max