aricaudio
Responses from aricaudio
| Tekton Double Impacts I also wanted to add that in any build I undertake, I like to maintain a "form flows function" approach (and also follow the KISS rule), by keeping all power circuitry towards the rear of the amp near the AC inlet, and all signal paths towards the... | |
| Tekton Double Impacts Hey Charles, you're very welcome! With regards to filter stages, I am a believer in using good quality electrolytic bypassed with a high quality metalized polypropylene. To get a film capacitor of the correct UF ratings to effectively smooth rippl... | |
| Tekton Double Impacts Hi all, I just wanted to briefly outline the scope of Tom's 300B SET build. It will be a single chassis stereo amplifier, using dual 5U4G rectifiers (both in parallel to provide double the current capacity), and a 6SN7 per channel for the input an... | |
| Tekton Double Impacts @charles1dad - This is a very robust power tube using very high voltages and requiring a very heavy voltage swing at it's grid to drive it. 30 watts is the absolute maximum this tube is capable of- and that's running it at it's absolute max specs ... | |
| Tekton Double Impacts @tkcha Cha's amplifier is a very robust build centered around the 845 DHT/211 tube, and will be using EL34's (also capable of a KT88) to drive the large voltage/current swings needed for the Input of the DHT. A 6SL7 will be the input stage, then ... | |
| Tekton Double Impacts @evolvist You do get more power in Ultra-Linear mode- which does suit heavier music a bit more, but I find the enjoyment of the music (be it soft strings or heavier music) to be more so in Triode-mode. The drop in power is much less noticeable th... | |
| Tekton Double Impacts @sbayne and @charles1dad - You're very welcome! Aric | |
| Tekton Double Impacts @david_ten - Yes, I recall you mentioning getting the front end in place, and all of that worked out first. I hope that's following a good path and things are working out! As far as the options for an SE amplifier, the 845/211 is definitely going ... | |
| Tekton Double Impacts Also, something to note- is the 6G4B is capable of 5.5 watts RMS in single-ended mode (single tube), as opposed to 3.5 watts for the 2A3. Parallel 6G4B can do closer to 8 watts (the same as a single 300B). | |
| Tekton Double Impacts @mac48025 - I'm really stoked that you're still loving the Transcend 88/120 amplifier, and I agree the 150's don't have the same "magic" in the midrange as some of the well-regarded KT88's. I occasionally switch back and forth between the types- a... | |
| Tekton Double Impacts @charles1dad and @sbayne - With regards to AC or DC. With Pentodes, tight twisting and layout of AC filaments can reduce all but the slightest of "ear to the speaker" hum. With Triodes, the 2A3 seems receptive to AC using good layout. However... | |
| Tekton Double Impacts @sbayne The 6B4G does not seem hard to work with. It would appear to require a bit more of a swing at the grid to drive to full output than say a 2A3, but isn't anything difficult to achieve. It also requires similar voltages and output transforme... | |
| Tekton Double Impacts @charles1dad It would seem similar to the issues when doing push pull in that one tube will either be pushing or pulling harder than the other. One way to avoid this is using matched tubes, or to have a variable bias for each tube (instead of a b... | |
| Tekton Double Impacts @sbayne - Thank you for that, it's much appreciated. | |
| Tekton Double Impacts Tom, Thanks for making that recommendation as well- it's greatly appreciated! I believe the larger Pentodes used in Triode-mode can really get you 90% of the way to the signature SET sound while getting you greater power and control over the drive... |