Kiddman, Tubes108 was referring to a set of MA-1s.
I have made plenty of mistakes in my career and I try to be the first to admit that. However I still have troubles with Tubes108's testimony. Again, we would not have built a pair of amps wherein one used stranded wire and the other solid wire. We have sent parts to customers for field repairs in the past but there is still something wrong with this picture that has me suspicious. We have a fairly relaxed warranty - its transferable, and while usually three years, depending on circumstances we will extend the warranty quite a lot further.
For example one time a vendor sold us some bad power transformers. It turned out that their faults could not be tested accurately on the bench and a number of them made it into the field. The company policy is we replace them under warranty regardless of the age of the amp.
Now what is bugging me here is that if there was an under-rated resistor value in the output section, that would have required a complete rebuild of the output section itself to repair. I know I would have felt really nervous about someone doing that in the field and it seems unlikely that I would have allowed that as there are some very critical connections in the output section- instead we would have handled it here.
**At the very least, these amps would have been bought used, and likely modified- they did not ship from us to Tubes108!**
Further, there is no place in the preamp wherein a diode could be installed backwards such that it could damage a resistor, let alone one that was part of the Caddock resistor package option!! FWIW though, some of the Caddocks are gray to start with, while others of the same value are black. If a diode was installed incorrectly, the preamp could not have passed testing or the listening testes. It would have blow fuses or one channel would have had no gain!
IOW the more Tubes108 reveals, the more I doubt his testimony.
Tubes108 cannot be contacted through this site like many members can, so there has been no mechanism to contact him directly to sort this out. His testimony isn't credible so I am forced to believe he has an agenda. He has certainly made no effort to contact us, which IMO would be something that someone on the up and up would have done at this point.
In short, I think this is all made up.