Hi - I just built a M7 clone using nobsound board. just by chance, I looked at the kondo site today and the real M7 has different tubes. Does this mean that the nobsound circuit is not a very good clone? Their m77 board at least has all the right tubes.
I have now built two of these kits. I have discussed the cct at length with Pete (ISC) and yes it is actually more of an M77 line stage. Having said that it is also a bit M7 so really a hybrid I guess. I used to have an M7 and it did have 6072s in it but not this cct. To be fair the kit really does remind me of my M7, I think the best word is ‘lovely’.
I built the first kit with the suppled parts, just adding Nichicon PSU caps and Miflex coupling caps. It sounded excellent. The second one I replaced all the resistors and used AN Caps on the PSU but still Miflex on coupling. This one is more refined and maybe slightly soft, still very good though. It is fascinating, the effect of components. The combinations must be endless.
I was with Rob on Friday and he said he should have the final check on yours done on next Weds Build Along. If you don’t mind I will pop along and take a look at it. Whereabouts are you? You are welcome to come and have a listen to mine. I went a bit Steam Punk.
Well, SITs are JFETs, the term SIT means Static Induction Transistor, which is another way of saying Field Effect Transistor (with subtypes like MOSFET, JFET, etc.)
However, “SIT” seems to have been adopted to specifically mean JFETs with triode-like characteristics, to distinguish from the one with pentode style characteristics as per most other transistors. They’re also called VFETs which is derived form the construction method (vertical structure rather than lateral structure).