Pp Tube Amplifier
💣 👉🏻👉🏻👉🏻 ALL INFORMATION CLICK HERE 👈🏻👈🏻👈🏻
www.next-tube.com/articles/Veen2/Veen2EN.pdf
In each amplifier, anode A1 of the upper tube B3 is connected to the upper tag 5 (yellow) of the output transformer. This is indicated in the first row of Table 2. In each amp, anode A2 of the lower tube …
electronics-diy.com/class-a-push-pull-tube-power-amplifier.php
This Class-A Push-Pull Tube Power Amplifier uses a Pair of Push-Pull Class A, Ultra Linear Mono Block Tube Amplifiers that can be used with several different vacuum tubes including KT77 / 6L6GC / KT88 with a 12SL7 driver and 6NO30 tubes. The amplifier stage is based on the Compact Hi-Fi Power Amplifier…
https://diyaudioprojects.com/Schematics/PP-EL84-Tube-Amp-Schematic.htm
06.09.2014 · The tube rectified power supply uses an EZ81 tube. There is more information available about tube power supply design in the Power Supply Design for Vacuum Tube Amplifiers article. The push-pull EL84 tube amplifier schematic is from the book "Build your own Audio Valve Amplifiers" by Rainer zur Linde. Push-Pull (PP) EL84 Tube Amplifier …
https://m.youtube.com/watch?v=EXhFrjwNXjA
21.05.2015 · Ecl86 tube amplifier. 2x15 watt push pull
custom order 6C33C-B pp tube amplifier assy process #8 ; F- 5Qi, one step to test
custom order 6C33C-B pp tube amplifier assy process #7 ; aux power transformer for pre & drive stage
custom order 6C33C-B pp tube amplifier assy process #6 ; power transformer design & testing
custom order 6C33C-B pp tube amplifier assy process #5 ; FLUXION audio model F-5Qi phono EQ inside
https://m.youtube.com/watch?v=MRS0of95NEM
17.02.2014 · Williamson Type PP. Audio Amplifier (conventional pentode connection)TUBEPre …
https://firebottles.wordpress.com/hi-fi-tube-amps/el84-pp-amp
* Why I Chose The EL84?
* What configuration?
* What Preamplifier/Splitter Tubes?
* Why The CCS load?
* The Power Supplies
– because I have a Siemens matched quad and a dozen soviet military 6P14P-EV tubes. – I have 95 dB sensitivity speakers, so the low-ish 5 watts of power produced by a triode-strapped PP EL84 amp would be enou…
What kind of push pull tube amplifier do I Need?
What kind of push pull tube amplifier do I Need?
This Class-A Push-Pull Tube Power Amplifier uses a Pair of Push-Pull Class A, Ultra Linear Mono Block Tube Amplifiers that can be used with several different vacuum tubes including KT77 / 6L6GC / KT88 with a 12SL7 driver and 6NO30 tubes. The amplifier stage is based on the Compact Hi-Fi Power Amplifier.
electronics-diy.com/class-a-push-pull-tub…
What kind of tubes are used in an amp?
What kind of tubes are used in an amp?
The amp sports two D6J4 tubes to get clear audio sound. The tubes have a blue filament that is almost mesmerizing and adds to the aesthetic value of the amp. It can just as easily be replaced by any of the 6K4, 6J1, GE5654, 6AK5, 6BC5, 403A/B, EF40, EF95 tubes.
bestchineseproducts.com/best-chinese-tu…
What is the push pull EL84 tube amplifier?
What is the push pull EL84 tube amplifier?
The push-pull EL84 tube amplifier schematic is from the book "Build your own Audio Valve Amplifiers" by Rainer zur Linde. Push-Pull (PP) EL84 Tube Amplifier Schematic
diyaudioprojects.com/Schematics/PP-EL8…
Which is the best Chinese tube amplifier to buy?
Which is the best Chinese tube amplifier to buy?
Best Chinese Tube Amplifier Reviews 2021 Best Chinese Tube Amplifier Where to get it Meixing Mingda MC-5S 5.0 KT90 Find it on AliExpress FEIXIANG FX-AUDIO TUBE-01 Buffer Find it on AliExpress INFI Audio Hybrid Class AB Tube Amplifie ... Find it on Amazon Fosi Audio T20 Tube Amplifier Find it on Amazon 4 more rows ...
bestchineseproducts.com/best-chinese-tu…
https://www.diyaudio.com/wiki/Baby_Huey_PP_EL84_amplifier
14.10.2009 · I believe that this is a fantastic choice as a first tube amplifier - the only thing wrong with it as a first amp is that its going to be VERY difficult for your second and third etc. amps …
www.audiodesignguide.com/PP2011/PP2012.html
PP2012 - 25-35 W Extreme Hi-End Push Pull Amplifier THIS IS NOT A COMMON PUSH-PULL! - very low feedback only 16dB - low distortion near to 0.3 - 0.4% - good damping factor near to transistorr amp…
Не удается получить доступ к вашему текущему расположению. Для получения лучших результатов предоставьте Bing доступ к данным о расположении или введите расположение.
Не удается получить доступ к расположению вашего устройства. Для получения лучших результатов введите расположение.
Class-A Push-Pull Tube Power Amplifier
This Class-A Push-Pull Tube Power Amplifier uses a Pair of Push-Pull Class A, Ultra Linear Mono Block Tube Amplifiers that can be used with several different vacuum tubes including KT77 / 6L6GC / KT88 with a 12SL7 driver and 6NO30 tubes. The amplifier stage is based on the Compact Hi-Fi Power Amplifier. One thing about DIY audio is that it is a journey, not a destination, it never ends. One project leads to another. The only limits are time and money. DIY audio is a lot about perfection. While I was quite happy with my previous tube amplifier projects, I felt there was room to improve (here comes the journey again). I like to be involved in the music. If anything sticks out, it will degrade the experience. So I tend to like smooth response, lots of detail, wide soundstage and full spectrum of sound. These amps deliver all that in quantity. Regardless of what tubes I used for outputs, the sound is "silky" and refined.
The previous project, the OddWatt 225 (6SL7 SRPP / KT77 Class-A Push-Pull Tube Amplifier) is in daily operation and (with JJ KT77 tubes) has a wonderful tube sound. The Odd Blocks are rather similar only they are two separate amps and were planned up front to be able to use any of the power tubes that share the same pin arrangements (6L6GC, KT77, KT88, EL34, 6CA7 and all the variants). TubeDepot.com has a good selection of these tubes - NOS and new productions. I initially used KT77 tubes as I was familiar with the sound and it would be a good starting point. I tried the amp with Electro-Harmonix KT88 tubes. Using the EH KT88 tubes has been a mixed situation. The EH KT88 can deliver more power, but the sound is different from the KT77. Additionally they don't behave well in this particular amp. I suspect the reason is related to thermal problems and the use of common (joint) cathode bias. The circuit allows for adjustment of the bias (the 25 ohm variable resistor) but the EH tubes do not stay in sync. One or the other tube (not predictable which one) will start to conduct more than its fair share of the current. With current balance being an important consideration of the design this is not good. By comparison the JJ 6L6GC tubes and JJ KT77 will balance within one mA and stay there. It is possible that this is a situation with just the one brand of KT88s. I have since then acquired a set of new production Gold Lion KT88 tubes and they behave perfectly. I will not further speculate why the one brand works and the other doesn't. It is just the way things are. For a more complete description of how the two stages of the amp work see the original OddWatt project (ECC802S SRPP / EL84 (6BQ5) Push-Pull Tube Amplifier). The SRPP driver and SIPP output work very well together. An alternative driver for 9 pin application is the type 5751. This tube will directly substitute for the octal 12SL7 in this circuit. Other tubes with the same base as the 5751 (12AU7, 12AT7 and 12AX7) were tried, but none performed as well as the 5751.
6NO30 Thermal Delay Relay Vacuum Tube
Photograph 2: 6NO30 Thermal Delay Relay Tube
As in nearly all tube projects dangerous voltages are used. Contact with the voltages at various points in this circuit can be fatal. If you are not familiar with tube equipment or are not experienced with high voltages, perhaps this is not a suitable project.
This is a pair of mono blocks amplifiers - each with its own power supply. In some ways this is more complex and costly and in some ways cheaper, easier and has advantages. For starters if you only need one amp, then you need only build one. Second if you need three (perhaps one for a sub woofer) then you can build three. In the stereo version it requires two power transformers, rectifiers and filters. But the transformers are less expensive than the one needed for a single chassis stereo amplifier. A side benefit is that you don't need a set of wheels to move the amps. A single chassis amplifier would weigh in excess of 50 pounds.
SRPP / SIPP Tube Amplifier Design with CCS
For design purposes I found that potential power tubes pretty much fell into two groups. Group "A" consists of KT77, 6CA7, EL34, 6L6GC and similar variants. Group "B" consists of KT88, KT90, 6550 and their variants. The difference is in both the bias voltages and maximum power dissipations. In the measurements and listening sections I relate the differences. The basic circuit is the same as previous Oddwatt amplifiers (see other projects). I saw no reason to mess up a good thing. There are some refinements though. The CCS in the original amps was a standard LM317 voltage regulator IC. I have since switched to the LM317HV. The voltage breakdown margin is better. I understand that these are discontinued but there are many available in parts houses. It really is only needed for the "B" version. The "A" version can use the standard LM317. To date I have not been informed of any failures in either application, but I don't feel comfortable with the 37 volt rating of the standard parts in the KT88 application. Some resistor values in the SRPP stage have been changed to increase in the current flow. Other DIYers have determined that this reduces the distortion level a bit. It makes sense, but measurements to date have not confirmed it as the level was already quite low. The power supply uses a Edcor 180-0-180 transformer with a full wave bridge across the full winding. With capacitor input filtering the B+ is between 450V and 475V. I tried a one Henry choke for a filter and decided it wasn't worth the cost and failed to significantly improve the filtering.
12SL7 SRPP KT88 Push-Pull Tube Amp Schematic
Figure 1: OddBlocks - 12SL7 SRPP / KT88 Push-Pull Tube Amp Schematic
12SL7 / KT88 Tube Amp Power Supply Schematic
Figure 2: OddBlocks - Power Supply Schematic
Part of DIY is that you can do things that manufacturers won't. I found a source for 6NO30 "tubes". For those of you who don't recognize it, this is a thermal relay in an octal socket. This is a rather old technology gizmo. It is the same size and shape as the 12SL7 and thus adds a nice symmetry to the amps. These "tubes" work on the principle of a heating element and bi-metal switch. The contacts are rated for 500,000 operations at full power. Unfortunately the voltage rating of the contacts is 120 VAC (breakdown voltage rating is 500 volts when new - whatever that means). Clearly, this is not high enough for the 360 volts AC being switched. So I use the contacts to activate a 12 volt relay that actually does the work of connecting the AC (360 v) to the rectifiers. The 6NO30 delays the activation by 30 seconds. Other values of thermal relays are available as well. These were cheap ($2.96 each) NOS. The numbering for them is as follows: The first digit(s) is the heater voltage. Then follows either NO or NC, for Normally Open or Normally Closed for the internal contacts. Finally the last numbers indicate the seconds of delay. Using the thermal relay is probably a sign of madness and the job could be done simpler with a transistor and a few passive parts, but it sure is cool. The remainder of the PS is similar to my other projects. I use a generic, inexpensive 12 volt, 3 amp SMPS to power heaters as it is cheap, very compact and provides clean well regulated power. A conventional transformer, rectifier, and filter could be used. The windings on the Edcor power transformer are 6 volts and would be satisfactory for group "A" tubes. For group "B" tubes as bigger transformer is needed. Generally, it is a bit easier (and cheaper) to get the required power at 12 volts at 2 amps than at 6 volts and 4 amps. Losses are lower for one. AC could be used on the heaters as well. It would most likely increase the noise floor a bit. If you are at all like me, you hate hum and noise. I would stick to SMPS for the heaters in all but "budget" builds of these amplifiers.
Construction - OddBlocks Tube Amplifier
The build is pretty straight forward. The chassis is steel by Hammond purchased from Antique Electronic Supply. The transformers came from Edcor. Wiring was point to point and I used some terminal (aka turret boards) boards for connections. The more sensitive circuitry is placed as far from the power transformer and noise sources as possible. The filter capacitors and B+ relay were glued to the chassis. A significant feature is the use of a ground buss (seen as a large bare copper wire in the photos). This has worked well in the past projects for minimizing hum, noise and the possibility of ground loops. A special precaution is required with regard to the heater circuits. I discovered some time ago that it is easy to exceed the heater to cathode voltage ratings of the driver tube when you use a SRPP design. There are several possible solutions. The one I used is to bias the heaters at about one third of the 240 volt supply. There is no current flow (just a tiny bit of leakage - in the microampere range). There are two extremely important considerations with this method. One, no part of the heater circuit can be grounded. Second, the source of the heater power must also not be ground referenced. It needs to float sort of like the heater circuit for many tube rectifiers. If you use a SMPS it needs to have the output isolated from the input and not in any way referenced to the ground. If it is not, then failure is virtually guaranteed. Another important point in the construction is the connections to the CCS. The "adjust" terminal of the LM317HV is grounded. The sense resistor is between the output terminal and ground. This is different from the use of the IC as a voltage regulator. When properly connected, the current is equal to 1.25 divided by the value of the resistor in ohms. Thus 10 ohms will result in a 0.125 amp current flow. The CCS needs to be heat sinked as it has to handle up to 8 watts of dissipation (when using KT88 at 180ma - less for other tubes and currents). Now for some magic, if you use a fixed 10 ohm resistor in the CCS for a basic setting it will result in close to 62 mA per tube. If you have a 22 ohm resistor connected in parallel to it with a simple SPST switch you can bump up the current to 90 mA per tube. The first setting is perfect for group "A" tubes and the second for group "B". Tube swapping is very easy in this amplifier.
12SL7 SRPP / KT88 Push-Pull DIY Tube Amplifier
Photograph 3: 12SL7 SRPP / KT88 Push-Pull Tube Amplifier - Inside View
For additional tube amplifier design and construction tips, see my design and construction tips and suggestions for vacuum tube amplifiers. Also, I have posted some suggestions for a tube amplifier wiring color code that you can use during construction.
Testing and Operation
Before actual listening to the amp it is important to verify that heater and B+ supplies are operational. There are lethal voltages in this amp, use extreme care when making any measurements. I suggest that you install the 6NO30 (if you use one) and not any of the other tubes. Turn on the power and check the voltages. There should be 12 VDC between the heater pins on the 12SL7 socket and B+ around 475 at the filter capacitors. The 240 voltage point will be high (close to the 475 reading) as there is no load on the circuitry. There should be no B+ until the 6NO30 switches (about 30 seconds). If all is well, shut the power off. The filters will be fully charged at this point so be careful not to contact any part of the circuitry. Insert the remaining tubes and reapply the power. Watch for problems (tube plates glowing red, sparks, smoke, noises and other fun things that indicate bad news). Check the voltages again. They should be in the proper ranges (12 VDC on the heaters, B+ of 475 and 240). If they are greatly different, something is wired wrong. If all is OK, shut down the power and attach speakers. Turn on the power. There should be little or no sound (hum or noise) coming from the speakers. A small amount may be OK if you have very sensitive speakers. If you can hear it at 12 inches from the speaker, then there is probably a ground / shielding type of problem. I have 93 dB/watt speakers and the hum and noise is barely audible with your ear directly on the speaker grill. If this all checks out, then feed the amps a signal and see what comes out. It should be warm sweet tube music. Now is the time to do an initial balance on the output tubes. A volt meter across the test points should read in the 40-200 mV range. The object is to adjust the control to make the reading for each tube the same. The readings should add up to a number equal to the mA that the CCS is set for. If you selected 125 mA, then the sum of the two readings should be close to 125. It is not important to be exact at this time. Allow the amp to run for at least 15 minutes and check the setting again. It will probably have changed a little - so reset it. I suggest that you check it this way about once a month to account for tube ageing. If the tubes won't balance then swap them. Some tubes are more sensitive to having the grid on the ground than others. It is nearly always possible to get them to balance. If the tubes won't balance then there is probably either a wiring error or a tube that is out of tolerance. It is not necessary to have matched tubes, but if the price is right then it makes them closer and easier to balance. I have found that not all companies balance tubes the same way and sometimes "matched" sets don't work as well as randomly selected ones. This circuit balances them at a fairly high level of idle current. Many companies use a small current value or base the tests on maximum voltage and current. For what it is worth, I have had good luck with JJ tubes and not so good experience with EH KT88 tubes. Just to be sure no one gets too excited, it may not be EH's fault. Not all tubes work well in all circuits and the EH KT88 tubes may be just fine in other designs. The ones I have just don't work well in this instance. The Gold Lion KT88 tubes worked fine, so it is not a basic property of the KT88 tube design itself.
One area that always seems to cause problems is the phase of the feedback loop. In one orientation it will be "negative" and in the other it will be "positive". Negative feedback stabilizes the gain and response of the amplifier. Only a small amount is used. It also takes care of any possibility that something will excite the output transformer resonances at around 60 kHz. Positive feedback will do just the opposite. The easiest wa
Ip Man 4 German
Slave Piss Tube
Sex Orgasm Tube
Jodie Gasson Xhamster Pics
Usmc Female Nude
NEW PUSH-PULL TUBE AMPLIFIERS
Class-A Push-Pull Tube Power Amplifier - Electronics DIY
Push-Pull (PP) EL84 Tube Amplifier Schematic (ECC83 input)
Push-pull EL84 amplifier | Firebottles! - Tube audio DIY
Baby Huey PP EL84 amplifier - diyAudio
PP2012 - KT88 Hi-End Push Pull Amplifier
Pp Tube Amplifier
