Tag Archives: Hi-Fi
The review is a double review between the Indeed 6N11 Tube Class A Headphone Amplifier Versus the Qinpu Q1 + Indeed L-top 6N3 Buffer Amplifier combo. First off the Indeed Hi Fi Labs 6N11 Headphone amplifier is a Hybrid amplifier using a Chinese military grade class tube, if you see a J on any Chinese tube it means that this is military grade. The indeed amplifier is a combo of the 6N11 tube and the IRF63o Mosfet.
The range of supplies that can be accommodated and outputs available now is large (the stereo TDA7265 (25+25W/8R) is useful for small hi-fis, stereo TVs, etc) and high efficiency class D designs can prolong battery life. The 50W+ TDA7293/4 series, which have DMOS output devices, offer a robust solution (the ’3′ can be paralleled for high currents into low impedances) and are seen in a number of ‘audiophile’ amplifiers and kits, like the Velleman K8040 and the Quasar 1218. In excess of 100W can be obtained from a single TO3 can with the TPA12A and LM12CL.
This mint-condition 1959 5F8-A was purchased in 1975 by Ken Settle, a Detroit-area photographer, who still owns the amp. Settle was 15 years old when he became enthralled by early Fender amps, and here he describes his first encounters with this most elusive of the tweed breed.
Many users, regardless of which transceiver they have, trying in some way to improve the quality of the transmitted signal. Who timbre coloring vote the “wrong”, who the wrong microphone. In improvised devices correction is usually achieved by choosing the quantities C and R in the respective circuits mic amps or AFC corrected with simple tone control, owners of “brand” often buy expensive studio microphones, equalizers, the use of which in the p / l technique rather unfairly than necessary .
The dual 15VAC / 120 – 160VA transformer does a fine job. If you plan to drive the little chip at the upper limit,
you can also use a 2 x 17VAC / 18VAC transformer. A higher voltage results in more output power, but also
increases the THD per Watt.
From a 15VAC transformer you can expect clean 20 Watts with 0,03% THD and
25 Watts (upper limit) with 0,5% THD. This output power is enough for high volume
levels under “normal” listening conditions.
The pre-amplifier is very easy to get on the board, and an innovative tone defeat. Instead of completely disabling the sound system, the massive de-sensitized, and they suggested a maximum range. This can be increased if you wish, you can have two tone controls, the elimination of 10 dB and a cut and the other with a little help and very subtle 3dB cut – it’s (surprisingly) a very small adjustment to the way For each day of the hearing.
50 watts hi-fi power amplifier circuit with power transistor 2N3055, MJ2955 ideal for home audio systems with simple assembly with ready PCB layout and parts side layout simple audio electronics component, now we are back with simple DIY audio power amplifiers.
These single supply op-amp hi-fi stereo tone control preamplifier circuit with TDA1054 IC built by SGS. TDA1054 is a 16-pin DIL package and integrates two separate preamp.
It is a low noise preamplifier with little or no problem in the construction process. The first half of the circuit (IC1A) has an input sensitivity of 3 mV and has a frequency correction of the C5, C3, R6 and R8 together. The bass signal from phono input is amplified, while the high signal is attenuated.
The NAD 3020 integrated amp on eBay for $ 66. The small amplifier was a hit in 1980 and immediately put NAD on the map. While the receiver’s reputation as Giant Killer it is not very big – only 16 x 10 x 3.75 inches. And the look of the base is removed. The sound is something else as soon as I pulled up I reminded myself why the budget-conscious music lovers bought more than half a million in 3020 over 3 years and it is the best-selling integrated amplifier of all time.
This HI-FI stereo FM transmitter is mainly due to the use of quality 3.5 turn variable coil. Tunable RF coils are ideal for precise frequency control, as her loving son is halfway into the plastic, embedded the frequency drift is minimized. Regular air coils are preferably not for the professional broadcast, because the coil expands and contracts with temperature changes. For this reason, variable coil as a substitute for an inductor and a capacitor air variable was chosen.