Microphone Preamplifier Fed. Tel. And Radio Military Transformer 600 ?:600? Peerless Altec. As for the impression of the sound, the powerful sound particles that seemed to fly toward the listeners chest were all wrapped in gorgeous colors and sparkled. In the 1950s, Eastman Kodaks total natural color image itself of powerful big screen cinema. The vivid color and luster that cannot be imagined from the military color (military khaki) appearance, and the exciting and entertaining sound appearance are surprising and attractive. Released by the British BBC broadcasting station. 50s Peerless military transformer. Characteristics and specifications can be understood from the words printed on the wall of the transformer. It is difficult to specify the exact year of manufacture, but since Peerless was acquired by Altec in 1947, the company name FED.TEL. AND RADIO CORP. It is considered to be an individual made in the year. It has been suspect that the transformer was designed and developed with the Korean War in 1950 in mind. The involvement of the BBC suggests that this lance was used for actual warfare in Asia and for intelligence warfare in Europe. HYBRID transformers are for communication applications. Military ultra-wide range performance. Due to the nature of military use, it has been believe that it is a product made using a high-level Western license. This is because it was surprised by its exceptional performance and tremendous performance when it tested the sound output. It boasts a powerful sound that is in some ways the most Western than Western trance of any Western era. In a nutshell, the sound is brilliant and dynamic. It has a heavy sound. It has sharp cuts and a dazzling shine. The expression glare is close. You can feel the thick touch of a clear oil painting. The deep, penetrating sound is similar to that of a high-efficiency horn-type driver. If you compare the rich expressive power and charm to the performance of an actor, it is Toshiro Mifunes lively performance itself that stood out in the movie Seven Samurai. There is a theory that the 1950s was the peak of the war-driven competition to develop tactical weapons between the superpowers. It was during this time that humans were sent to the moon. Among the 50s Western series military equipment, there are many things that make you feel unusually high motivation of invention, wisdom and sensitivity. It was born out of the American economic structure, which became more profitable the more it waged war. Monaural playback using a transformer split coil. The sound source is stereo. The balanced transmission stereo signal output of the DAC is received at the split coil (300 ohm +300 ohm) input on the primary side of the transformer. The signal fused during electromagnetic wave conversion is reborn as a monaural signal inside the transformer. This is a familiar stereo/mono conversion method for Sakuma amplifiers. The balanced transmission monaural signal output from the secondary coil (600 ohms) is sent to the right channel of the 600? balanced circuit attenuator and passed to the right channel input of the preamplifier as a 600? balanced transmission output. The unbalanced mono signal is output as two mono channels inside the preamplifier and simultaneously output to two power amplifiers. A mono signal is played simultaneously from the left and right speakers. NL-69715-1 HYBRID TRANS. Impedance Basic (600 ohm: 600 ohm) Volume 1: 4 sections, Vol. 2: 2 sections. Impedance change is possible by connecting each section coil in parallel, half (half), or series. (150/300/600ohm: 150/300/600ohm). Can be used for step-up or step-down. For example, if 150 ohm : 600 ohm, the impedance ratio is 1:4, and the winding ratio = step-up ratio is approximately 2.0 times. Boosting of MC cartridge is also possible. Also 600 ohm : 150 ohm can be reversed to send a gain attenuation signal to the line. DCR = DC resistance value (36 ohm: 36 ohm). Below are the measured DC resistance values between each tap of the 4 coils. (3-4) (5-6) : (9-10) (11-12) 17.4 17.7 17.6 17.6 Size: 68 x 58 x 96 mm (2.6 x 2.2 x 3.7) (excluding screw height) Weight: 1157g (1.157Kg) (2.5 lbs) Attached is the circuit diagram created based on the instructions. It has found that using a single transformer (split coil type) to convert stereo to monaural would be an interesting way to use it. It has been found this in a performance test. The 2-channel balanced transmission stereo (left and right) signals are sent to two pairs of split coils (300?/300?) on the primary side of the transformer input. Two-channel AC signals flow through two coils separately and are converted into magnetism by electromagnetic induction inside the transformer. In this process, the 2-channel (left and right) components are magnetically fused into a 1-channel monaural specification. Due to the magnetic electromotive force through the core, an equivalent monaural alternating current signal fused to two pairs of split coils (300?/300?) on the secondary side of the transformer output flows simultaneously. If you listen to this with balanced circuit headphones (300? + 300?), you can monitor the monaural signal from both the left and right units. When listening to stereo sound source with headphones using the above setting monaural specifications, it had a strange experience with a certain sound source. A phenomenon in which the music signal disappears and only a small distorted sound stands out is a defect. When it listened to the same sound source in stereo in the past, it didnt feel any problems. Rather than saying that, it might be more correct to say that it didnt notice it at the time. This is because the sound source was somewhat unnatural and uncomfortable even when played in stereo. It has been encountered the sound source of OUT OF PHASE. It was discovered and verified at this time that there was a problem with the phase control of the stereo sound source in question. In the previous transformer, when it changed the simple positive/negative connection on either the left or right side of the input primary side split coil, the original musical tone was revived. Stereo sound source very rarely has such a problem sound source case. Thanks to this transformer test, it was able to discover stereo phase shift in three sound sources. It has believe that it had a phase shift in the stereo sound source. The reason for this may be a wiring mistake in the recording microphone or equipment used, an incorrect connection cable, and so on. If you feel unnaturalness or discomfort when playing a stereo sound source of a video, you should be able to clarify whether the reason is phase shift or something else by checking the phase using this method. However, it must be a balanced transmission system from the entrance to the exit. Theoretically, when two AC signals (left and right) with different positive and negative phases are superimposed, the AC signals (sounds) cancel each other out, and sounds other than common mode noise disappear. A highly accurate balanced circuit correctly reflects this effect. The important thing is the balance (equilibrium) circuit connection. Correct verification and judgment are difficult when monitoring unbalanced (unbalanced circuit) connections. A stereo/monaural conversion transformer is necessary and effective for checking the positive phase of the stereo. It would be even better if there was a switch that could individually invert the left and right channel phases of the stereo sound source in the previous stage of the two-section coil on the primary side. All you wise people should try it. Please inspect pictures for condition reference. Thank you for visiting our listings. We update our inventory every 24 hours, However, some items may sell locally in between and we may need to cancel the order. Please confirm availability before buying. CAUTION: Import TAXES are responsibility of buyers.

Microphone Preamplifier Fed. Tel. And Radio Military Transformer 600 ?:600? Peerless Altec. As for the impression of the sound, the powerful sound particles that seemed to fly toward the listeners chest were all wrapped in gorgeous colors and sparkled. In the 1950s, Eastman Kodaks total natural color image itself of powerful big screen cinema. The vivid color and luster that cannot be imagined from the military color (military khaki) appearance, and the exciting and entertaining sound appearance are surprising and attractive. Released by the British BBC broadcasting station. 50s Peerless military transformer. Characteristics and specifications can be understood from the words printed on the wall of the transformer. It is difficult to specify the exact year of manufacture, but since Peerless was acquired by Altec in 1947, the company name FED.TEL. AND RADIO CORP. It is considered to be an individual made in the year. It has been suspect that the transformer was designed and developed with the Korean War in 1950 in mind. The involvement of the BBC suggests that this lance was used for actual warfare in Asia and for intelligence warfare in Europe. HYBRID transformers are for communication applications. Military ultra-wide range performance. Due to the nature of military use, it has been believe that it is a product made using a high-level Western license. This is because it was surprised by its exceptional performance and tremendous performance when it tested the sound output. It boasts a powerful sound that is in some ways the most Western than Western trance of any Western era. In a nutshell, the sound is brilliant and dynamic. It has a heavy sound. It has sharp cuts and a dazzling shine. The expression glare is close. You can feel the thick touch of a clear oil painting. The deep, penetrating sound is similar to that of a high-efficiency horn-type driver. If you compare the rich expressive power and charm to the performance of an actor, it is Toshiro Mifunes lively performance itself that stood out in the movie Seven Samurai. There is a theory that the 1950s was the peak of the war-driven competition to develop tactical weapons between the superpowers. It was during this time that humans were sent to the moon. Among the 50s Western series military equipment, there are many things that make you feel unusually high motivation of invention, wisdom and sensitivity. It was born out of the American economic structure, which became more profitable the more it waged war. Monaural playback using a transformer split coil. The sound source is stereo. The balanced transmission stereo signal output of the DAC is received at the split coil (300 ohm +300 ohm) input on the primary side of the transformer. The signal fused during electromagnetic wave conversion is reborn as a monaural signal inside the transformer. This is a familiar stereo/mono conversion method for Sakuma amplifiers. The balanced transmission monaural signal output from the secondary coil (600 ohms) is sent to the right channel of the 600? balanced circuit attenuator and passed to the right channel input of the preamplifier as a 600? balanced transmission output. The unbalanced mono signal is output as two mono channels inside the preamplifier and simultaneously output to two power amplifiers. A mono signal is played simultaneously from the left and right speakers. NL-69715-1 HYBRID TRANS. Impedance Basic (600 ohm: 600 ohm) Volume 1: 4 sections, Vol. 2: 2 sections. Impedance change is possible by connecting each section coil in parallel, half (half), or series. (150/300/600ohm: 150/300/600ohm). Can be used for step-up or step-down. For example, if 150 ohm : 600 ohm, the impedance ratio is 1:4, and the winding ratio = step-up ratio is approximately 2.0 times. Boosting of MC cartridge is also possible. Also 600 ohm : 150 ohm can be reversed to send a gain attenuation signal to the line. DCR = DC resistance value (36 ohm: 36 ohm). Below are the measured DC resistance values between each tap of the 4 coils. (3-4) (5-6) : (9-10) (11-12) 17.4 17.7 17.6 17.6 Size: 68 x 58 x 96 mm (2.6 x 2.2 x 3.7) (excluding screw height) Weight: 1157g (1.157Kg) (2.5 lbs) Attached is the circuit diagram created based on the instructions. It has found that using a single transformer (split coil type) to convert stereo to monaural would be an interesting way to use it. It has been found this in a performance test. The 2-channel balanced transmission stereo (left and right) signals are sent to two pairs of split coils (300?/300?) on the primary side of the transformer input. Two-channel AC signals flow through two coils separately and are converted into magnetism by electromagnetic induction inside the transformer. In this process, the 2-channel (left and right) components are magnetically fused into a 1-channel monaural specification. Due to the magnetic electromotive force through the core, an equivalent monaural alternating current signal fused to two pairs of split coils (300?/300?) on the secondary side of the transformer output flows simultaneously. If you listen to this with balanced circuit headphones (300? + 300?), you can monitor the monaural signal from both the left and right units. When listening to stereo sound source with headphones using the above setting monaural specifications, it had a strange experience with a certain sound source. A phenomenon in which the music signal disappears and only a small distorted sound stands out is a defect. When it listened to the same sound source in stereo in the past, it didnt feel any problems. Rather than saying that, it might be more correct to say that it didnt notice it at the time. This is because the sound source was somewhat unnatural and uncomfortable even when played in stereo. It has been encountered the sound source of OUT OF PHASE. It was discovered and verified at this time that there was a problem with the phase control of the stereo sound source in question. In the previous transformer, when it changed the simple positive/negative connection on either the left or right side of the input primary side split coil, the original musical tone was revived. Stereo sound source very rarely has such a problem sound source case. Thanks to this transformer test, it was able to discover stereo phase shift in three sound sources. It has believe that it had a phase shift in the stereo sound source. The reason for this may be a wiring mistake in the recording microphone or equipment used, an incorrect connection cable, and so on. If you feel unnaturalness or discomfort when playing a stereo sound source of a video, you should be able to clarify whether the reason is phase shift or something else by checking the phase using this method. However, it must be a balanced transmission system from the entrance to the exit. Theoretically, when two AC signals (left and right) with different positive and negative phases are superimposed, the AC signals (sounds) cancel each other out, and sounds other than common mode noise disappear. A highly accurate balanced circuit correctly reflects this effect. The important thing is the balance (equilibrium) circuit connection. Correct verification and judgment are difficult when monitoring unbalanced (unbalanced circuit) connections. A stereo/monaural conversion transformer is necessary and effective for checking the positive phase of the stereo. It would be even better if there was a switch that could individually invert the left and right channel phases of the stereo sound source in the previous stage of the two-section coil on the primary side. All you wise people should try it. Please inspect pictures for condition reference. Thank you for visiting our listings. We update our inventory every 24 hours, However, some items may sell locally in between and we may need to cancel the order. Please confirm availability before buying. CAUTION: Import TAXES are responsibility of buyers.

Pair Vintage PEERLESS ALTEC 4722 Microphone Step Up Transformers Tested/Working.

Pair Vintage PEERLESS ALTEC 4722 Microphone Step Up Transformers Tested/Working.

Two PEERLESS division of ALTEC LANSING 4722 Microphone transformers as seen in the photos - Shipping via Fedex ground service