ndevamp

Responses from ndevamp

Roger Alan Modjeski (RAM) 1951 - 2019
@bdp24, just the one now :-0 
Roger Alan Modjeski (RAM) 1951 - 2019
I realise now that Roger’s real family was actually his audience of fans. That must be why he took such good care of them.It would have been great to be there at the service and hear the stories.I’m not sure he will quite work things out with Davi... 
Best Tchaikovsky’s 6th Symphony Recording
+1 for the Pierre Monteux/Boston Symphony on Living Stereo.But will give the Mravinsky a listen! 
Hana SL or ML?
The NZ forum I subscribe to have been comparing the SL and ML, the ML wins in terms of sonics apparently. I haven’t experienced the ML in my own system though. I have an SL here and it definitely likes cartridge loading above 2k ohms to open out t... 
Roger Alan Modjeski (RAM) 1951 - 2019
Gold! Touching, and I’m glad others who have been close to him have experienced him in a similar way. His amps are destined to become design classics. I agree that the RM-10 is both simple and revolutionary in design. 
Headphone amp as pre amp
The RM-10 was designed by Roger Modjeski, not your average engineer. He gets higher power out of the EL84 by using higher voltage and less current through the tube. It’s proven to be very reliable and the amp has a good following. I owned one for ... 
Roger Alan Modjeski (RAM) 1951 - 2019
Nice one Jerry.Clio09, I didn’t know he made the 6L6 version either. When did he do that, and why? If you want to sell it, I’d take good care of it! A bit of Roger in the house would be lovely. I’ve got an idea about how he got 250w out of 6L6s sa... 
Roger Alan Modjeski (RAM) 1951 - 2019
Come to think of it, I recall Roger made a special version of the RM9 with 6 input tubes, the extra one being a better driver tube (6BQ7, like the RM200) circuit for the output stage. He also added the self balancing input stage to eliminate needi... 
Headphone amp as pre amp
Using a headphone amp as a line preamp should present no problems and could make the circuit work better anyway. Since the load impedance of the headphone is removed for use as a line stage it’s circuit should then work with lower distortion.For p... 
Roger Alan Modjeski (RAM) 1951 - 2019
We have an RM9 Mk2 in the family as well and it’s mostly been reliable but it has suffered the odd quirk over 22 years, and not just tubes. The time the fuse blew at a home audio club event was not only frustrating, it showed the amp to have some ... 
Roger Alan Modjeski (RAM) 1951 - 2019
The Quad 57s run 6kV on the two bass panels and specified for 1.5kV on the treble panel. I remember Roger musing that he wanted, I thought at the time somewhat ambitiously, to run 1.8kV on his Quads. I always thought that would be pushing them a b... 
Roger Alan Modjeski (RAM) 1951 - 2019
Mmm, sounds like he was working on the direct drive amp for the Majestic last year. So a circuit for it probably exists somewhere in his stuff. I imagine it would be a refinement of his 80s-90s one. I wonder if this was going to be a statement cir... 
Roger Alan Modjeski (RAM) 1951 - 2019
Yes I remember he would say let’s work it out! It annoyed him that people would come out with a statement and say it’s true, and only have erroneous evidence for it. 
Roger Alan Modjeski (RAM) 1951 - 2019
Yes the RM1! A great design.Re the nice comments about the RM10: That would have made him very proud. He told me he wanted the RM10 to be remembered as a gutsy little amp. Job done Roger. Job done. 
Roger Alan Modjeski (RAM) 1951 - 2019
Yes well self bias is the generic term which can also be other forms of self bias as well as cathode bias, like grid self bias. So you’re right, it’s specifically cathode bias. Ok about the schematics. It might be best not to release them publicly...