![]() is abusive of the Chinese 5Z4P rectifier. The μ 100 12AX7 makes much more sense to me.Īccording to the 5Y3 datasheet, a 47 μF. ![]() Even with NFB, tube amps don't exhibit the gargantuan damping factors SS amps deliver.įrankly, I don't trust the amplification factor (μ) 35 Chinese 6N1 to provide sufficient gain to "feed" both the O/P tube and the GNFB loop. Mid 90s sensitive speakers will do, as long as the impedance curve is reasonably flat. plate dissipation multi-grid O/P tube leaves 7.6 WPC. Still, I think some real progress can now be made.Ĥ0% efficiency for a 19 W. There is incomplete congruence between the 2 data sheets. According to this, the Chinese 6P3P is equivalent to the 6L6G. AAMOF, I can easily see following, for the most part, Magnavox and not the seller.Īpparently, I was dead wrong about the Chinese 6P3P. Just so it can be seen that the Chinese circuitry is not complete garbage, compare it to the provided Magnavox console amp schematic. decouples the voltage amplifier triodes from the O/P tubes and improves stability. (say 15 μF./400 WVDC) was left out from the 230 V. In what I think was "penny pinching", a cap. For this situation, a Zener diode stack plus the requisite passive parts should be good enough in regulating g2 B+. In particular, highly irritating intermodulation distortion (IMD) is reduced. The lowest open loop distortion for full pentode mode is realized by regulating screen grid (g2) B+ at a fraction of anode (plate) B+. However, reducing open loop distortion, before NFB is applied, is important. The NFB loop improves damping factor and lowers distortion. The amp employs a full pentode mode O/P tube, along with a global negative feedback (GNFB) loop. Stop now take it to a tech and let them finish it. Thus, this project will now be over $200+ for a poorly designed amp.ĭ. Finish it take it to a tech before I plug it in let him/her look over it. Finish it, plug it in, turn it on and take out the power grid for miles then throw it away and tell myself it was only $140Ĭ. Stop wasting my time throw the whole thing away and keep telling my self it was only $140ī. My question is what should I do next? (It is a multiple-choice question)Ī. That is if I not already have not made a mistake. Everything in between looks much more difficult and the chances of me not making a mistake somewhere is slim to none. The output transformers seemed easy enough so researched power transformers a little more daunting but in the end not too bad.īut, to me those where the easy parts. ![]() I assembled everything easily, did a quick tutorial on reading schematic and researched output transformers. I should have never purchased this amp because it does not come with instructions. The endless research done to figure out were to start led me here where I found outĪ. Instead of packing it backup and sending it back I made the second mistake of going ahead and trying to build the thing. I was expecting step by step instructions but what I got is one piece of paper with a schematic and some text. I purchased this one: 6N1+6P3P Amplifier HiFi Class A Tube Audio Vacuum Power Amp DIY Single Ended Kit | eBay I learned which end of a soldering iron to hold just a few months ago and managed to put together the crossovers in the Parts Express Overnight Sensations I have very little knowledge about circuits and what the various parts do. So, I figured I would give it a whirl for $140 with free shipping. I did some due diligence (ie google) but not much came up. All components were correctly supplied too which was nice.I purchased one of those cheap Chinese tube amp kits. I know nothing about electronics and was totally dependent on the instructions and wiring diagram to build this amp. “I’ve got to commend you on the kit and especially the instruction manual which is excellent. Some feedback from Lamington kit builders: Your kit is supplied with the very comprehensive Lamington Construction Manual which provides step by step guidance as you build your amp. In addition, the kit comes with a punched chassis to save you the effort of metal bashing! Our bulk purchase of parts means that it can be cheaper to buy the kit than to purchase all the parts at retail prices. The Lamington Amp Kits include all the parts necessary to build your own Lamington valve guitar amp. In addition, would you benefit from detailed step by step DIY instructions to assist you as you build your amp? Interested in building your own Valve Heaven Lamington valve guitar amp, but would appreciate having all of the parts brought together for you in a kit? 2W Lamington Junior I 18W Lamington I 10W Lamington Lite
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