spritzer Posted December 9, 2015 Report Posted December 9, 2015 While on the subject, here is the actual Megatron Mk2...
nopants Posted December 10, 2015 Report Posted December 10, 2015 seems to be much smaller, and larger spots to accommodate those supremes
xianghao Posted December 10, 2015 Report Posted December 10, 2015 12 hours ago, purk said: So you are selling them? At what price? part of them at about $2999
johnwmclean Posted December 10, 2015 Report Posted December 10, 2015 (edited) 2 for the price of a HeadAmp BHSE. That's what I call a bargain... Don't tell me it includes an RK50? Curious to see internals. Edited December 10, 2015 by johnwmclean
Hopstretch Posted December 10, 2015 Report Posted December 10, 2015 1 hour ago, johnwmclean said: 2 for the price of a HeadAmp BHSE. That's what I call a bargain... Planning on running dual mono?
xianghao Posted December 11, 2015 Report Posted December 11, 2015 (edited) 23 hours ago, johnwmclean said: 2 for the price of a HeadAmp BHSE. That's what I call a bargain... Don't tell me it includes an RK50? Curious to see internals. i will take photos later all the BOM from MOUSER normal with RK27 QUAD RK50 quad will take more 660$ Edited December 11, 2015 by xianghao about RK50
spritzer Posted December 13, 2015 Report Posted December 13, 2015 I hope you aren't running the heater wires for the CCS tubes all the way to the PSU? That would be very bad...
Pixiy Posted January 12, 2016 Report Posted January 12, 2016 Can I use 400V PSU(GoldenReference HV) for megatron?
eggil Posted January 17, 2016 Report Posted January 17, 2016 (edited) Can there be any problems with the amplifier if all the 4 LED's and all the tubes light up? I changed the heater transformers to OTC Antek and even if everything is properly connected and double-checked, there is no sound from either channel. The source works fine with the KGSSHV so I know that is not the problem. Before I take everything apart again I would not mind some clues. Edited January 17, 2016 by eggil
spritzer Posted January 17, 2016 Report Posted January 17, 2016 The LED's are not a good way to troubleshoot the amp. Tubes being lit means nothing, the heaters are just pilot lights really. To actually troubleshoot anything, start checking voltages.
eggil Posted January 17, 2016 Report Posted January 17, 2016 (edited) I did last night. There were none in the Stax jack except for the Bias voltage. I should know better than to play with high voltage late at night and sleep deprived. Once I noticed there were no voltage readings I realized something was not hooked up: the O+ and O-'s on the amp board Everything works fine now with absolutely no noise even with the volume maxed out. Replacing the Hammond transformer heaters with Antek's helped, as well as rearranging wires to avoid the AC lines being close to the signal lines. One of my input tubes however has an intermittent problem and will have to buy new ones. I redid the top panel, different color because the red colored panel looked too ugly for my taste, and added ventilation slits. Now it runs much cooler. Quite happy with the results. Edited January 17, 2016 by eggil 2
Kerry Posted January 17, 2016 Report Posted January 17, 2016 Nice. This build is definitely on my list, but with so many new projects I'm not sure how quickly I'll get to it. Enjoy
chinsettawong Posted January 18, 2016 Report Posted January 18, 2016 Nice work! Sent from my SM-N9005 using Tapatalk
eggil Posted January 18, 2016 Report Posted January 18, 2016 Thanks. Just to clarify, this is the same Megatron I built a few months ago but did quite a few changes since then; all for the best. This is a great amp. I do wonder why not many have been built.
johnwmclean Posted January 18, 2016 Report Posted January 18, 2016 Nothing like a facelift! I did liked the red but the silver panels are schmick.
Victor Chew Posted January 18, 2016 Report Posted January 18, 2016 Nice work Enrique. PSU pictures my friend! You know you must show us your full work .
Victor Chew Posted January 18, 2016 Report Posted January 18, 2016 Unfortunately not. My back has been giving me so much trouble in the last 1 year that I have not been able to do much at all. My L2 is screwed and I am swimming daily to strengthen my muscles. I have done everything except for the wordings, ventilation and wirings. When I get better, I will get the Megatron done, post pictures and write a few words of the sound. I am happy that you guy are getting things together and I must say that the bench mark of the finished products has been moving up and really impressive. I have heard Rstar's Megatron and the sound was nothing short of impressive. I think that it is a cut above the KGSShv and I am too wondering, like you, why not more people are building the Megatron. The big picture of the sound from this amp and its decay of the music in particular is nothing less than impressive. Mind you, this is using normal wima caps and not the one with V-caps used my Spritzer. I cannot imagine what it will be like.
eggil Posted February 25, 2016 Report Posted February 25, 2016 Hey, tubes can be a pain in the rear end! Especially if you buy from Ebay. I now officially know what microphonics are courtesy of old RCA 3 mica tubes (may be they are fake ) Quote
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