25-10-2012, 11:20 AM
Thanks Lawrence for the link,interesting. Firstly I have a good pre-amp for a MM cartridge,also if I was to make one it would be IC based. A preamps only there to boost the low MM cartridge signal with as little distortion as poss. I was talking about the pre stage,rather than a pre-amp. All PP valve amps I,ve seen use a pre stage,splitter and OP valves.
Why 100 watts? I must admit I dont really know. I started this thread to bounce a few ideas about. I have a big pair of Mission 730 speakers,which say they need a minimum of 30w going up to 150w. As usaul I take specs with a pinch of salt. Is that RMS/ my info doesnt say. I had an idea of using them in my recording studio (bedroom full of recording stuff) Re technical specs-I,m still learning about dBv/m/u etc but most importantly headroom. Wether I use the Mission;s or some proper monitors,I need power to spare.
I ,m also toying with a PA amp. I have two 15 inch Celestion woofer's,some Kef woofers (as Mids?) and some Fane horns (for highs) . Two cabs with that lot in will need some power. I want to do some gigs at some point. I want to record a backing track (drums/bass/backing guitar/keys/FX) with myself up front on lead vocals.
Lastly,I have some hefty speakers down stairs-currently driven by a transistor Yamaha amp. Its loud....but sometimes when the neighbors are out I want to FEEL the bass in my gut. I hope that addresses the 100w question. I,m a bit deaf too. : )
As for iron,(Al,if you still have the TX,will you let me know) I will most likely ask Ed D to make a proper mains/OPT TX's. I,ve been trying to upload the Geloso G272A schematic only,but my computor skills are rubbish. i dont want to upload the whole file which is in Italian. The Geloso G272A uses a mains TX with three HT windings
267/242/206volts @ 0.48A/0.5A/45mA bridge rectified with what looks like a secondary transformer. sorry,I,m still learning. Andy.
Why 100 watts? I must admit I dont really know. I started this thread to bounce a few ideas about. I have a big pair of Mission 730 speakers,which say they need a minimum of 30w going up to 150w. As usaul I take specs with a pinch of salt. Is that RMS/ my info doesnt say. I had an idea of using them in my recording studio (bedroom full of recording stuff) Re technical specs-I,m still learning about dBv/m/u etc but most importantly headroom. Wether I use the Mission;s or some proper monitors,I need power to spare.
I ,m also toying with a PA amp. I have two 15 inch Celestion woofer's,some Kef woofers (as Mids?) and some Fane horns (for highs) . Two cabs with that lot in will need some power. I want to do some gigs at some point. I want to record a backing track (drums/bass/backing guitar/keys/FX) with myself up front on lead vocals.
Lastly,I have some hefty speakers down stairs-currently driven by a transistor Yamaha amp. Its loud....but sometimes when the neighbors are out I want to FEEL the bass in my gut. I hope that addresses the 100w question. I,m a bit deaf too. : )
As for iron,(Al,if you still have the TX,will you let me know) I will most likely ask Ed D to make a proper mains/OPT TX's. I,ve been trying to upload the Geloso G272A schematic only,but my computor skills are rubbish. i dont want to upload the whole file which is in Italian. The Geloso G272A uses a mains TX with three HT windings
267/242/206volts @ 0.48A/0.5A/45mA bridge rectified with what looks like a secondary transformer. sorry,I,m still learning. Andy.
