original 6AU6 with a 6AH6 or the military equivalent. 2) Replace the original 0A2 150 volt regulator tube with an 0B2 108 volt regulator tube. The higher voltage is not really needed, and the 6AH6 is often much less prone to both drift and chirp than the 6AU6. Page 13/25
Heathkit kits, pictures, specifications, diagrams, schematics. Model Number: Description: Notes: Picture: Specs: Info: Docs: 1st Year: Last Year-Accutrac Turntable
IF Amplifier IF Amplifier Amplifier None 1 ST102 STIO' ST105 ST106 ST107 ST108 (6BP5)VIO (6AU6)U01 (6DC6) VI (6DC6)V11 (6AT6) (6BA5) V6 (6BA6) V7 (6DC6) V2 Fuse, Ampere Slo-B10. . . Receiver power supply protection Set of color dots • • .. Color OOdÖ the tube sockets to match a code on the Tubester case tops.
So I designed a 2 tube rig running a 6AU6 oscillator in a Colpitts circuit driving a 6DQ6 TV sweep tube amplifier. It runs about 450 volts on the plate from a built-in power supply and an OA2 voltage regulator for the oscillator; the whole transmitter is powered by 120 VAC.
Three 6AU6's drawing 300 mA apiece exceeds my filament budget, but I thought I'd take a look at the 6AU6 preamp, because I found that its octal equivalent, the 6SH7, sounded pretty nice in the Moonlight. In a discussion at AX84, Mark mentioned that 6AU6's (and other RF
We plan to sell it in 2021. The amplifier is a parts-only kit with wiring diagrams, schematics and instructions (in English), and wiring is point to point wiring. It will be sold for $500 USD. This is the beginning of this one. I'm going to make it a kit for you to build your own amp, just like an amp.
Now tubes. The HW101 uses a bunch of 6AU6 tubes and 6EA8 tubes. The 6AU6 is a pentode while the 6EA8 is a dual tube with a pentode and a triode in one envelope. In my experience these are the cause of many issues. The 6EA8 can become gassy or the triode section can become weak. I test all of these and replace as required.
Mar 14, 2001 · The drop across the two 100 k ohm resistors is a little smaller, maybe a couple of volts, than before so the 6AU6 plate current is little changed and so is the grid voltage. The Amplifier. The audio amplifier uses a 12AX7 and a 6V6. The input signal passes through a .01 microfarad capacitor which has a high voltage rating.
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I've got quite a few of those too, but not as many as 6AU6. The 6AU6 is still common and cheap, same with the 6AQ5. I'm thinking maybe the input pentode 6AU6 can kick the guitar signal up enough, that a lower gain triode like the 6DJ8 can run the Tone Stack final gain stage. Wondering if a circuit like that can sound good as a guitar amp? I've got quite a few of those too, but not as many as 6AU6. The 6AU6 is still common and cheap, same with the 6AQ5. I'm thinking maybe the input pentode 6AU6 can kick the guitar signal up enough, that a lower gain triode like the 6DJ8 can run the Tone Stack final gain stage. Wondering if a circuit like that can sound good as a guitar amp?
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A series resonant circuit is a time tested way to build an input circuit. For the MW bands, the amount of capacitance and inductance is fairly large. In my opinion, this is a good circuit for shortwave regen sets. Series & Parallel Resonant Tuned. I think this is the best antenna tuner. Some will recognize this circuit from some of my dx ...
U-102 - similar to above, gold/brown grille cloth, controls on the top, 3 inputs, foot switch, one 6CA4, two 6AQ5, two 12AX7 one 6AU6 tubes. 1x12 Jensen speaker and diamond shaped logo. Another Amp from this period is a 40W tube amp w/ 3 inputs, tremolo, reverb and footswitch, and either 1 or 2 Jensen 12 inch speakers with the Univox name in ... 12AL8 Regen by flipperhome. 6 photos and 2 videos.
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Oct 21, 2009 · Audio preamp circuit diagrams / circuit schematics Note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy. Some circuits would be illegal to operate in most countries and others are dangerous to construct and should not be attempted by the inexperienced.
for the 6AU6 keyed amplifier, are located in the VFO com- partment (See text). C54 C24 This second and concluding part of W2PUD's article contains the constructional details and adjustment procedures. A complete description of the circuit to- gether with a schematic diagram and parts list ap- peared in Part I in the June-July issue of HAM TIPS. Schematic (Radio)... Schematic (TV-FM) Tube Placement Chart Voltage and Resistance Measurements Horiz. Sweep Circuit Adjustment Parts List and Description . Photographs Cabinet-Rear View Capacitor Identification . Chassis-Top View . FOLDER . 11, 22 10 RECORD CHANGER UNIT-WEBSTER-CHICAGO MODEL 100 HOWARD W. SAMS & CO., INC. • Indianapolis 1 ...
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The picture on the left shows the top of the amplifier chassis. Each of the ten amplifiers consists of one 6AU6, one 6BQ7A, on OA2 and half of a 12AV7 dual triode. All in all there are 35 tubes in the amplifier chassis (and another 15 tubes in the power supply).
Rather than do the usual champ with a 12ax7 or 2 6av6 I decided to do a 5c1 since I had some smaller 7pin pentodes. I had done the 1/3 watt with the 6au6 preamp and poweramp so I used the preamp section and tied it to the 6aq5 power amp. Here is the schematic. I have made changes to the power dropping resistors to get voltages more when I want themThe Kalamazoo Model 1 needs a dual triode (12AX7) as a preamp tube which requires a 9 pin socket. A 6AT6 won't have enough gain, you will just barely be able to overdrive the 6AQ6. If you don't want to modify the chassis to install a 9 pin socket, one option would be to use a 6AU6 pentode as the preamp tube.
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6AU6 6BE6 6AU6 6CL6 6146 6AU6 12BH7 ECC81 ECC81 12AX7 12AU7 12AT7 12AT7 6AL5 6X4 5U4G 5R4GY 0A2 0B2 0B2. Johnson Pacemaker PDF Manual (18.5 MB) Johnson Pacemaker PDF Schematic (3 MB) EF Johnson 1957 Color Sales Flyer (7.44 MB) CLICK ON A PICTURE TO ENLARGE IT FOR A CLOSER VIEW UN-RESTORED PACEMAKER (2) ABOVE CHASSIS CLICK ON A PICTURE TO ...
Find great deals on eBay for ampex preamp. Shop with confidence. 6AU6: This was a popular tube in radio magazines articles for receivers. It is an amplifier for RF/IF especially for IF applications. The grid of the 6AU6 is wound with uniform spacing to produce a sharp cut-off. On the contrary, the 6BA6 grid is spaced close in the middle and wide at the ends to give a remote cut-off.
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RCA 1963 AN-197 New High-Gain Tubes for IF-Amplifier and Limiter Stages of FM Tuners - The 6HR6 and 6HS6. These were the only high-performance RF/IF pentodes that had the same pin-out as the 6AU6/6BA6. Unfortunately, they came late in the game and are now very scarce.
This Hi Fi stereo preamplifier circuit is congenital with TDA1054 IC from SGS. TDA1054 is a 16-pin DIL amalgamation and integrates 2 abstracted preamp circuits. It is a low babble preamp with little or no botheration in the building process. IF Amplifier IF Amplifier Amplifier None 1 ST102 STIO' ST105 ST106 ST107 ST108 (6BP5)VIO (6AU6)U01 (6DC6) VI (6DC6)V11 (6AT6) (6BA5) V6 (6BA6) V7 (6DC6) V2 Fuse, Ampere Slo-B10. . . Receiver power supply protection Set of color dots • • .. Color OOdÖ the tube sockets to match a code on the Tubester case tops.
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This is a feedback amplifier, and the bias for the 6AU6's is not supplied by the small cathode current, but by feedback from the plates of the 6V6's, which holds the cathodes of the 6AU6's at 6.7V. The feedback ratio is about 56, which sets the voltage gain of the amplifier, by the usual rule.
The Merrill Audio PURE Tape Head Preamp takes its designed cues from the famed Jens Phono stage and circuit designer, Jens Waale. The Merrill Audio PURE Tape Head Preamp has 6 speed and eq settings 3.75 NAB, 7.5 NAB, 15 NAB, 7.5 IEC, 15 IEC and 30 IEC2. The gain is selectable at 71db of 65db. All settings are saved. Stick a 100k ohm log taper pot on the grid of the 6AU6 for a volume control and that part is done. All this can be seen in the below schematic. Power Supply. The next thing that needs to be designed is the power supply. Since this amplifier is rather simple to begin with, a simple power supply is in order.
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The grounded grid RF amplifier was followed by the typical Scott 6U8 mixer oscillator circuit, and 3 - 6AU6's in the standard Scott 3 tube IF/limiter circuit. A 12AU7 was used as the audio amplifier, a EM80 was used for the tuning indicator, and a 6X4 served as the B+ rectifier.
Jul 06, 2016 · The circuit is built around a popular Sanyo s stereo head preamp IC LA3161. Low electrical signals from the playback heads are fed to pins 1 and 8 of IC1 via DC decoupling capacitors, respectively. Components between pins 2 and 3 and pins 6 and 7 provide adequate equalization to the signals for a normal tape playback. Specifications: Power supply: 9
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