Have you ever ever before thought about what was very good to purchase as far as vintage sound tools was involved? It could possibly be puzzling. Immediately after all, there is a huge amount of it available, mainly employed, and it can be hard to discover machines which you can depend on and believe in. Even so, there are many items to look for, and recalling several essential details can truly help you pick the proper gear and steer clear of gaining tricked on products that isn't very good, or in very good condition.
General Electric Tube Amplifier Auctions
 ^ GE General Electric 6L6GC amplifier power tube,tested great!,6L6  US $9.99
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 New Old Stock General Electric 6SF5 Amplifier Tube US $11.00
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 General Electric GE 7189A Tube Amp 12AX7 US $51.10
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 7N7 loctal radio amplifier vacuum tubes General Electric RCA 2 tube tested 7N7 US $9.99
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Keep in mind that there are three main factors to appear for so far as audio tools, and individuals are variety, electricity, and distortion. Classic sound recording equipment is famed for its dynamic array, quality strength, and lack of distortion. The truth is, lots of people believe that which the worst distortion happens in digital form on a CD. This is because vinyl and mediums like it hide the flaws inside a spherical about way covering them with richness and fullness of tone as a substitute of uncooked digital edgy chaos.
General Electric Tube Amplifier Videos
5.35 min. | 5.0 user rating
OMG, I remember buying this for .99! Worth every penny I must say. I've never put a tube in it, and only had to reconnect the antenna to get AM radio reception. I did purchase new needles approximately 25 years ago and these are the same ones still in the machine. The variable reluctance cartridge has awesome sound but the needles can sometimes be finicky. 8" woofer and two 5" midrange/tweeters with high-pass filter cap. This thing really fills the room with sound. I believe I've got an issue with the volume pot - needs cleaning. I have to test all the tubes also, and get two new needles online. This baby will be going in my rec-room someday too!
Vintage audio speakers are good. Especially if your searching for large effectiveness speaker systems, full assortment speaker systems, or Alnico speakers. Be sure you validate the speaker systems in doing work situation, given that they are generally extremely difficult to repair. If your getting vintage I'd not be troubled about cabinet blemishes as they shouldn't effect sound. Several point out that record players offer the best representation of audio. Very good record players and information will really give again over you invest on them if you recognize terrific audio. You need to snatch these up if you uncover them in superior ailment. Should you can get your fingers on them, reel to reel gamers and tape are astounding. Manufacturers to seem for are Teac, Pioneer and Sony. They may be cumbersome, big, and difficult to move, nevertheless they will make up for it when you listen for the large excellent tape they use. Also, bear in mind to verify on what type of damage the classic unit has prior to casting your bid. Recall the unit in question might be 30 many years outdated, so overlook in regards to the producer possessing what you need to correct it up! You are able to purchase some points like lights and knobs from on the net dealers, however , you can count on to pay a quite penny occasionally over $10 for just a single knob! Also bear in mind that factors like a beat up situation are tough to fix you may, having said that, exchange hardwood conditions very effortlessly, as though you care to shell out the money you could have 1 custom created. And usually remember to look at rates. Don’t get used gain of by paying out greater than the merchandise is price! Classic equipment isn't rare more than enough to interrupt the lender on, unless of course you just come across a thing tremendous unusual. So, work out great judgment, and don’t dump money into something which isn't really worth it.
General Electric Tube Amplifier question of the day
Question What could be the source of a constant tapping sound in a tube radio?
I recently purchased a 1935 General Electric A-65 console radio from an antique shop. When I turned it on, it worked (surprisingly) and picked up both the AM and shortwave bands it's designed for, but with subpar sound quality. I have enough footing in electronics to know what I'm doing, so I decided to replace the original capacitors (minus the micas, as I read they stand the test of the time well) and resistors (the resistors had been replaced with these goofy makeshift things in the 60's). Every capacitor corresponds with the correct voltage rating in the schematic, and I even replaced some of the frayed cloth wiring. I thought the radio would be fantastic after all of this, but upon turning it on, all I received was a constant popping noise from the speaker. This noise constantly repeats between half-second intervals. Adjusting the tuner does nothing to this sound- it can only be muted by turning down the volume. I've rechecked the entire chassis 3 times already (VERY tedious work), but everything looks to be in place. Could it be possible that the vacuum tubes (there are six in total) are causing this noise? Four of the six tubes are in black casings, so I can't visibly tell their condition. My only other option is to replace the tubes, but I'd like some input before I go throw around money on dollar tubes. Or could this sound be coming from the capacitors? Tube Stats: 6A8 Converter Oscillator tube (antenna feeds into this, I assume it just amplifies the signal) 6K7 I.F. tube (the "I.F." stage is frequently mentioned in the manual, but I fear this part is over my head) 6H6 Diode Rectifier and Automatic Volume Control tube 6C5 Audio Amplifier tube 6F6 Audio Output tube (it seems to be closely related to 6C5) 5Z4 Rectifier tube (Clear casing, but has a blackened silver burn on side) Basically, if anyone could point where in a radio circuit this popping noise would be generated, it would be very much appreciated. Although it'd be tough to read on a computer screen, here is the manual if you're willing to go that far: http://www.nostalgiaair.org/Pa ... 007755.pdf Thanks! The link above doesn't work. Here's the correct one: http://www.nostalgiaair.org/PagesByModel/755/M0007755.pdf
Best Answer What type of speaker is used is it permanent magnet type of magnetic coil type ? Try to use a normal 4-5 ohms Speaker 1)Did you change main filter capacitor bigger one next to rectifier tube,then 2)Try to substitute rectifier with 2 Diodes (1250v piv 2amps) with 1k 10watts wire wound resistor to control the out put voltage ( try to use variable wire wound resistor to achieve the correct voltage.(Measure the out put DC voltage is it 250-300V) 3) Try main Audio out put Tube circuit any char ed resistance (450ohms with a capacitor ( 10mfd 50v) replace both(the capacitor some time taken from main capacitor 3 in one 4) if nothing solved suspect with any of a tubes only ( pre Amp or power Amp) (ps didn't see the diagram 1st after seeing it bit clear) Take care while working on it all area high voltage! If nothing solve pm me
I recently purchased a 1935 General Electric A-65 console radio from an antique shop. When I turned it on, it worked (surprisingly) and picked up both the AM and shortwave bands it's designed for, but with subpar sound quality. I have enough footing in electronics to know what I'm doing, so I decided to replace the original capacitors (minus the micas, as I read they stand the test of the time well) and resistors (the resistors had been replaced with these goofy makeshift things in the 60's). Every capacitor corresponds with the correct voltage rating in the schematic, and I even replaced some of the frayed cloth wiring. I thought the radio would be fantastic after all of this, but upon turning it on, all I received was a constant popping noise from the speaker. This noise constantly repeats between half-second intervals. Adjusting the tuner does nothing to this sound- it can only be muted by turning down the volume. I've rechecked the entire chassis 3 times already (VERY tedious work), but everything looks to be in place. Could it be possible that the vacuum tubes (there are six in total) are causing this noise? Four of the six tubes are in black casings, so I can't visibly tell their condition. My only other option is to replace the tubes, but I'd like some input before I go throw around money on dollar tubes. Or could this sound be coming from the capacitors? Tube Stats: 6A8 Converter Oscillator tube (antenna feeds into this, I assume it just amplifies the signal) 6K7 I.F. tube (the "I.F." stage is frequently mentioned in the manual, but I fear this part is over my head) 6H6 Diode Rectifier and Automatic Volume Control tube 6C5 Audio Amplifier tube 6F6 Audio Output tube (it seems to be closely related to 6C5) 5Z4 Rectifier tube (Clear casing, but has a blackened silver burn on side) Basically, if anyone could point where in a radio circuit this popping noise would be generated, it would be very much appreciated. Although it'd be tough to read on a computer screen, here is the manual if you're willing to go that far: http://www.nostalgiaair.org/Pa ... 007755.pdf Thanks! The link above doesn't work. Here's the correct one: http://www.nostalgiaair.org/PagesByModel/755/M0007755.pdf
Best Answer What type of speaker is used is it permanent magnet type of magnetic coil type ? Try to use a normal 4-5 ohms Speaker 1)Did you change main filter capacitor bigger one next to rectifier tube,then 2)Try to substitute rectifier with 2 Diodes (1250v piv 2amps) with 1k 10watts wire wound resistor to control the out put voltage ( try to use variable wire wound resistor to achieve the correct voltage.(Measure the out put DC voltage is it 250-300V) 3) Try main Audio out put Tube circuit any char ed resistance (450ohms with a capacitor ( 10mfd 50v) replace both(the capacitor some time taken from main capacitor 3 in one 4) if nothing solved suspect with any of a tubes only ( pre Amp or power Amp) (ps didn't see the diagram 1st after seeing it bit clear) Take care while working on it all area high voltage! If nothing solve pm me
Question Which was better, plate modulation or grid modulation, and why?
In the late 1930's/early 1940's, General Electric experimented with what they called a "grid modulated" transmitter, where the grid of the PA tubes was modulated instead of the plates. This supposedly resulted in lower HV voltages and currents in the RF power amplifier and higher efficiencies. My question is, was the grid-modulated amplifier more efficient than the older, plate-modulation design? What class was the newer design and what were some of the advantages and disadvantages of grid- versus plate-modulation? It is my understanding that before grid modulation came about, all RF transmitters were plate modulated.
Best Answer [1] It has more efficient because grid was placing much closer to the cathode. [2] It can be class A, Class C. With two tubes in push-pull,it can be class AB or B. Grid modulation has both voltage and current gain whereas plate modulation has only current gain. [3] Plate modulation uses on very high power RF output final stage.
In the late 1930's/early 1940's, General Electric experimented with what they called a "grid modulated" transmitter, where the grid of the PA tubes was modulated instead of the plates. This supposedly resulted in lower HV voltages and currents in the RF power amplifier and higher efficiencies. My question is, was the grid-modulated amplifier more efficient than the older, plate-modulation design? What class was the newer design and what were some of the advantages and disadvantages of grid- versus plate-modulation? It is my understanding that before grid modulation came about, all RF transmitters were plate modulated.
Best Answer [1] It has more efficient because grid was placing much closer to the cathode. [2] It can be class A, Class C. With two tubes in push-pull,it can be class AB or B. Grid modulation has both voltage and current gain whereas plate modulation has only current gain. [3] Plate modulation uses on very high power RF output final stage.