0000000915 00000 n The second or third designs sounded the best.
In the process of developing this design I became so impressed with the sound, that I decided to further develop it into a complete amplifier, the Tubelab SE .
I am not likely to have the time to do so in the near future. 0000003587 00000 n Try using one of these in place of the plate load resistor on any low level triode amplifier stage. I decided to experiment with several different current source designs since I wasn't completely happy with the operation of the constant current diodes. Try replacing your amp's stock speaker!If you found this video helpful, be sure to like and subscribe!NextGenGuitars:https://nextgenguitars.ca/Warehouse Guitar Speaker:https://nextgenguitars.ca/products/wgs-8-g8c-20w-8ohm.htmlT-SHIRTS:https://teespring.com/stores/darrell-braun-guitarTAB STORE:Songs, Lesson Worksheets, and Guitar Techniques!https://www.etsy.com/ca/shop/DarrellBraunGuitar?ref=l2-shopheader-nameDARRELL'S GUITARS \u0026 GEAR LIST!https://imp.i114863.net/vM09jMY AMPS:H\u0026K Grand Meister Deluxe 40 - https://imp.i114863.net/Na1gVMesa Boogie - https://imp.i114863.net/xdVB1PATREON:Become a Patron to be eligible for gear give-aways!www.patreon.com/DarrellBraunGuitarALBUM:iTunes: https://itunes.apple.com/ca/album/celtic-classics-and-instrumental-hymns/1368819279
This page is intended to show the thinking that led to the design of the Tubelab SE. The cathode resistor needs to be 220 ohms. Stacking two or more of these circuits in series raises the voltage handling capability, but this must be done in a way to insure proper voltage sharing.
Here are my EDUCATED GUESSES. This iteration of the Not Quite as Simple 45 Amp performs better than the original design.
Start with the one that you can get parts for. It produces excellent sound and would make a nice 1.5 watt 45 SE amp as shown. I HAVE built a complete stereo amp based on this work that uses common audio tubes (6L6, EL-34, KT-88) in triode or UL configuration. The Simple 45 began as the starting point for a "Super Tube" amp design. At that time I had not paid much attention to the whole single ended craze. Two worked the best. I got three 45 tubes on Ebay for $11.51 because they were sold as "in fair shape, one is between good and bad". The punch of a bass drum is more realistic through the 300B amp, but the snap of a rim shot, or a snare drum sounds much better on the single ended amp. All is not perfect however, the bass is not as "in your face" as the 300B push - pull amp. See that page for the complete design. The Super Tube design will receive further attention shortly.
I haven't actually built any of these designs using DHT's. Want a mod that is easy to do, inexpensive, and makes a huge difference in your tone? They all work as shown.
I tried the usual mosfet current sources with good results, although the current is not as constant as I had hoped. All of the mosfets that I have available are enhancement mode devices (the most common mosfet). Performance figures are shown in Australian dollar (AUD). 0.0: 0.0: 0.0: 0.0: 0.0: 0.1: 0.2: 0.5: 0.8: 0.7: 48/101: 64/113: 81/114: 88/96: 79/91: Quartile Ranking: 2: 3: 3: 4: 4: Performance Criteria. 0000001143 00000 n The CCS IC's have arrived.
This is especially noticeable with techno type music. I just acquired an FFT analyzer program that runs on your PC using the sound card for an input. I get a lot of e-mail about this design. The Simple 45 started out as a basic two stage single ended 45 amp. The Simple 45 started out as a basic two stage single ended 45 amp. The amp had an almost unidentifiable fogginess to it that the FFT analyzer revealed as residual 60Hz hum. The schematic of the amp as it exists today is here. Then I built another one. You would need 2 floating filament supplies (or two windings on a transformer) and about 30 to 50 volts more B+ voltage. Why a 45 Amp? This qualifies as cheap, so I decided to build a single ended 45 amp. I have also used one of these as a driver for a 40 watt per channel monster 845SE amp. It sounds amazingly good considering the distortion. I have received dozens of e-mails asking for the complete construction details, I am sorry to say that there are none. The output transformer is borrowed from the Ongaku project (extreme overkill). I also experimented with active current sources using bipolar transistors. I have not actually built these designs, but these are good places to start.
0000002531 00000 n 0000001892 00000 n There is no reason that you can't use cathode bias in these designs. However, new ideas are always founded on concepts and theories. Since this amp would evolve into a hybrid "super tube" amp, the sound quality must be excellent. With 2 watts of power you can't get real loud. Any of these designs could be the starting point for a complete stereo amp, but I never took them that far. This provides lower distortion and higher gain than the conventional resistor. The Simple 45 began as the starting point for a "Super Tube" amp design. It was my intention to use this design as a starting point for "super tube" experiments. It comes real close to the 5842's performance. I will definitely try these when they show up. The diodes are available from Mouser in several values up to a few milliamps.
These devices are in the off state with zero bias applied, not optimum for a current source. Now I am actually considering building an even bigger one using 833A's. Halloween Bats Craft. 0000000727 00000 n Currents above 5 mA require more than 50 Volts to operate. I am not sure that such an amp is possible, but whatever I come up with, you will read about it on this web site.
0000002802 00000 n All experiments were carried out using bench power supplies, document.write("
