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gibson ga-79rvt schematic 주제에 대한 자세한 내용은 여기를 참조하세요.
gibson stereo-reverb.-tremolo ga-79rvt amplifier
The GA-79RVT is a true Stereo Amplifier having two completely independent channels with re- spective 15 watt power amplifiers. Each amplifier channel can be …
Source: schematicheaven.net
Date Published: 8/23/2021
View: 4372
Buy your Gibson GA 79RVT Schematic
Buy your Gibson GA 79RVT Schematic searches Beitman, Rer, Radio and Television … Schematics sent by Email £1.80 (~ $2.50 or €2.10).
Source: thecodemachine.co.uk
Date Published: 4/4/2021
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Gibson Schematics – Dr.Tube
GA-79RVT Stereo-Reverb, 2x15W 2×10″ Combo. With reverb, tremolo and high gain channel. GA-80 Vari-Tone, 25W 2×15″ Combo. With improved tremolo …
Source: www.drtube.com
Date Published: 6/2/2022
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Gibson GA 79 RVT – EL34 World
There’s a much cleaner schematic in Hoffman’s schematic library. Hoffman Amps Forum image Logged …
Source: el34world.com
Date Published: 1/12/2022
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Gibson GA79RVT Stereo Amplifier, 1966 – The Twelfth Fret
The GA-79RVT uses four 6BQ5 (EL84) power tubes, two for each power amp. The preamp section uses three 6EU7 tubes, and one each 7199 and 12AU7 …
Source: www.12fret.com
Date Published: 9/10/2022
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Recapping A Vintage Gibson GA-79RTV Stereo Combo
The Gibson GA-79RVT is pretty cool—a true stereo amp with two discrete output … Looking at the schematic, I see the power supply section (which is a …
Source: www.premierguitar.com
Date Published: 4/18/2021
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GIBSON GA-79RVT Stereo Cab plans or dims – diyAudio
Greetings brethren, I am consering cloning tthe Gibson Ga-79rvt, … But I figured after looking at the schematic it should be fairly easy …
Source: www.diyaudio.com
Date Published: 5/30/2022
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주제와 관련된 이미지 gibson ga-79rvt schematic
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주제에 대한 기사 평가 gibson ga-79rvt schematic
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- Date Published: 2016. 5. 26.
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Buy your Gibson GA 79RVT Schematic
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Gibson Schematics
GA-1RT Maestro Reverb-Echo, 8W 1×8″ Combo
With reverb-echo.
Schematic with 1x 12AX7, 1x 6BM8 & 1x 5Y3GT, (Gibson).
GA-1RVT Maestro Reverb-Echo, 8W 1×8″ Combo
With reverb-echo and tremolo.
GA-2RVT Maestro Deluxe Reverb-Echo, 16W 1×12″ Combo
With reverb and tremolo.
Schematic with 4x 6EU7, 1x 12AU7A, 2x 6V6GT & 1x 5Y3GT, (Gibson).
GA-3RV Reverb III
All transistor pre-amp with reverb and tremolo.
Schematic, (Gibson).
GA-4RE Reverb Echo
Pre-amp with reverb.
Schematic with 2x 6EU7 & 1x 12AU7, (Gibson).
GA-5 Les Paul Junior, 5W 1×10″ Combo
The Gibson amplifier model GA-5 has had many incarnations. The first model GA-5 Les Paul was introduced in 1954. The circuit of this amp is an almost identical copy of the Fender Champ (5C1 circuit). It was fitted with a Jensen 10″ field coil speaker. It had a “TV” style cabinet.
Schematic with 1x 6SJ7, 1x 6V6 & 1x 5Y3, (Gibson).
Schematic with 1x 6SJ7, 1x 6V6 & 1x 5Y3, (Joe Piazza).
Schematic of Fender 5C1 Champ Amp, (Fender Musical Instruments).
GA-5 Skylark, 5W 1×8″ Combo
GA-5T Skylark Tremolo, 5W 1×8″ Combo with Tremolo
The GA-5 Les Paul was renamed to Skylark in 1957. This Skylark lasted till 1961. The 10″ speaker was changed to an Jensen 8″ ‘special design’ speaker. The input circuitry was changed too. In 1962 the Skylark underwent a major redesign.
Schematic with 1x 12AX7, 1x 6V6 & 1x 5Y3 (1957), (Joe Piazza).
Check out John King’s GA-5 page if you’re looking for more info on the GA-5 amps.
GA-6
This amp is very similar to the Fender Tweed Deluxe (5C3).
GA-6 Lancer, 14W 2×12″ Combo
This amp replaced the BR-6. The circuit is identical to that of the GA-14.
Schematic with 2x 12AX7, 2x 6V6 & 1x 5Y3.
GA-7 Les Paul TV, 4W 1×10″ Combo
Introduced in 1955/56. It used the same circuit as the GA-5 Les Paul Junior amp.
GA-8 Gibsonette, 9W 1×10″ Combo
Photograph of a 1952 Gibsonette.
GA-8 Discoverer, 9W 1×10″ Combo
There were at least two different models GA-8 Discoverer.
GA-8T Discoverer Tremolo, 9W 1×10″ Combo
The first GA-8T was in production from 1954 upto 1961. It was covered with tweed, and used a 12AX7, two 6BM8 triode/pentode tubes and a 5Y3 rectifier. The second GA-8T was part of the
Crest Line range of amps and was in production from 1962 upto 1966 and used two 6EU7’s, two 6BQ5 pentodes and a 6CA4 rectifier. This was the same amp as the Epiphone EA-35T Devon.
Schematic of the first GA-8T with 1x 12AX7, 2x 6BM8 & 1x 5Y3.
Photograph of 1962 GA-8T Discoverer Tremelo.
GA-9, 10W 1×10″ Combo
This amp replaced the BR-9. It used a 6SJ6 pentode on the input, two parralled 6V6 tubes as a single ended power amp and 5Y3GT rectifier.
GA-14 Titan, 14W 1×10″ Combo
The circuit of this amp is identical to that of the GA-6 Lancer and the Epiphone EA-30 Triumph amp.
GA-15 Maestro, 14W Amp
This amp was introduced in 1955.
Schematic.
GA-15RV Maestro, 14W 1×12″ Combo
GA-15RVT Explorer
With reverb and tremolo. This is the same amp as the Epiphone EA-32RVT.
Schematic.
GA-16T Maestro Viscount, 14W 1×10″ Combo
Schematic.
GA-17RVT Scout
Schematic.
GA-18T Explorer, 15W 1×12″ Combo
With tremolo.
GA-19RVT Falcon
Schematic.
GA-20 Crest, 14W 1×12″ Combo
This amp was introduced in 1950. This amp is almost identical to the Epiphone EA-25 Century amp.
Schematic.
GA-20T Ranger, 16W 1×12″ Combo
This amp was introduced in 1956. With tremolo. This amp is almost identical to the Epiphone EA-25T Century amp.
GA-20RVT MinuteMan
With reverb and tremolo.
Schematic.
GA-25, 15W 1×12″ & 1×8″ Combo
This amp was introduced in 1947.
Schematic (1961) (Gibson).
GA-25RVT Hawk, Combo
Schematic (1963).
GA-30 Invader, 14W 1×12″ & 1×8″ Combo
This amp was introduced in 1948.
Schematic with 2x 6SJ7, 1x 6SC7, 2x 6V6 & 1x 5Y3
GA-30RV Invader, 14W 1×12″ & 1×8″ Combo
This amp was fitted with a P12R and a C8S speaker. It had a reverb. It used 3x 6EU7, 1x 12AU7, 2x 6V6 and 1x 5Y3 tubes.
GA-30RVT Invader, 25W 1×12″ & 1×10″ Combo
With reverb and tremolo.
GA-30B
Schematic.
GA-35RVT Lancer
With reverb & tremolo.
Schematic.
GA-40 Les Paul, 14W 1×12″ Combo
This amp was introduced in 1952. With tremolo. The speaker is a 12″ Jensen Concert.
GA-40T Les Paul, 25W 1×12″ Combo
This amp was introduced in 1955. With variable tremolo.
GA-45RV Maestro, 16W 4×8″ Combo
This amp was introduced in 1955. With reverb.
Schematic with 3x 6EU7, 1x 12AU7A, 2x 6V6GT & 1x 5Y3GT (courtesy of Keith Robb).
Photograph (courtesy of Keith Robb).
GA-45RVT Saturn?
With reverb and tremolo.
GA-45T Maestro, 16W 4×8″ Combo
This amp was introduced in 1955. With tremolo. It is essentially a GA-40 with a bass & treble tone control and a different speaker configuration.
GA-46T Super Maestro, 60W 2×12″ Combo
With tremolo.
GA-50, 1×12″ & 1×8″ Combo
This amp was introduced in 1948.
GA-50T, 1×12″ & 1×8″ Combo
With Tremolo. This amp was introduced in 1948.
GA-55, 18W 2×12″ Combo
This amp was introduced in 1954.
Schematic with 2x 12AY7, 1x 6SC7, 2x 6L6GA & 1x 5V4G.
GA-55V, 18W 2×12″ Combo
With vibrato. This amp was introduced in 1954.
GA-55RVT Ranger, 50W 4×10″ Combo
With reverb and tremolo.
GA-60 Hercules, 25W 1×12″ Combo
GA-70 Country Western, 25W 1×15″ Combo
This amp was introduced in 1955/56. It was fitted with a Heavy Duty Jensen 15″ Concert speaker with an Alnico V magnet.
GA-75 Recording, 25W 1×15″ Combo
This amp was introduced in 1950.
Schematic with 2x 6EU7, 1x 6C4, 1x 6FQ7 & 2x 6L6GC.
GA-77 Vanguard, 25W 1×15″ Combo
With a “high gain” channel.
Schematic.
GA-77RV Vanguard, 25W 1×15″ Combo
With reverb and high gain channel.
GA-78RV Maestro 30, 2x15W 2×10″ Combo
With reverb.
GA-79RV Stereo-Reverb, 2x15W 2×10″ Combo
With reverb and high gain channel.
GA-79RVT Stereo-Reverb, 2x15W 2×10″ Combo
With reverb, tremolo and high gain channel.
GA-80 Vari-Tone, 25W 2×15″ Combo
With improved tremolo and 6 preset tone control switches.
GA-83S Stereo-Vib, 2x18W 1×12″ & 4×8″ Combo
With stereo vibrato.
GA-85, 25W 1×12″ Combo
GA-86 Ensemble, 25W head with 1×12″ Cabinet
With removable control panel.
GA-87 Maestro Stereo, 2x18W 2×12″ Combo
Stereo accordion amp with reverb.
GA-88S Stereo Twin, 2x18W 2×12″Combo
GA-90, 25W Combo
This amp was introduced in 1953.
GA-100 Bass, 35W Head with 1×12″ Cabinet
The control panel is seperated from the speaker cabinet. This is the same amp as the Epiphone EA-70 Bass amp.
GA-200 Rhythm King, 60W 2×12″ Combo
Two channel high fidelity sound with built in compression circuit to prevent overloading.
GA-Super 400, 60W 2×12″ Combo
Three channel high fidelity sound with built in compression circuit to prevent overloading.
Check out Björn Anger’s The Gibson Amp Project site with lots of information on a lot of old Gibson tube guitar amps.
Check out John King’s GA-5 page if you’re looking for more info on the GA-5 amps.
Check out Gibson’s schematics page if you’re looking for more Gibson schematics.
If you want to see what Gibson is up to nowadays, you might want to check out the official Gibson site.
Gibson GA 79 RVT
6EU7 vs 12AX7:
In a guitar amp, I don’t think you’ll detect a big difference between a 6EU7 and 7025 or high quality 12AX7. Magnatone/Estey used a 6EU7 on the 460 and 480 of 1961-1963. Prior to that, they used a 12AX7 in the predecessor model 260 and 280’s. After the 460/480, they went back to the 12AX7 in the M15. If you look at the circuits surrounding those first triodes in all those amps, they used the same plate resistors, voltages, caps., etc.., so I don’t think there is any need to re-think the GA77RVT change to a 12AX7 other than pinout.
reverb:
you can use a 6U8A subbed for a 7199. They seem to have similar/same specs. as far as a reverb transformer, I think you could use a Fender reverb OT 7.5K:8 or a champ 8K:4/8ohm type transformer. Fender drove them with a parallel 12AT7, plus you have wiggle room with a reverb tank.
There was a shootout of vintage stereo amps (some guitar/amp magazine) where they compared the Magnatone (I think a M15), an Ampeg Twin-Echo, and a GA77RVT. you might fish around for it.
The downside about the GA77RVT is the trem and reverb is only in one channel. To see if you’d really dig the concept, put two similar amps next each other and and plug your guitar in to one and daisy-chain the input to the other. The 480/M15 at least has two separate vibrato units that are driven by the same oscillator, so there is enough variance in left and right that it really sounds stereo. I’d never suggest a 480/M15 build because you can buy one for what you’d spend in NOS varistors and transformers alone. As far as the GA77RVT goes, its a big project for an amp that isn’t a whole lot more that two discrete amps sharing a cab and power supply.
❌SOLD❌ Gibson GA79RVT Stereo Amplifier, 1966
Here’s a Gibson GA79RVT Multi-Stereo combo amp, featuring two ten inch speakers in a wedge cabinet each powered by its own 15 watt amplifier. This model was introduced in 1960 as the GA-79 and upgraded with Reverb and Tremolo to the GA-79RVT in 1961, and the entire line was discontinued in 1967 when Gibson ceased amp production in Kalamazoo.
On this example, the two 10-inch CTS speakers on this Gibson GA79RVT bear dates of the 8th week of 1966 – late February, and the Tolex covering is black faux-gator with a naturally faded silver/grey grille cloth. The wedge cabinet design is reminiscent of the Watkins Dominator amp, which at 18 watts was a high powered monster in the 1950’s UK market. The GA-79RVT uses four 6BQ5 (EL84) power tubes, two for each power amp. The preamp section uses three 6EU7 tubes, and one each 7199 and 12AU7 tubes along with a solid-state rectifier.
The Gibson GA79RVT has a number of features relatively unusual for guitar amplifiers. There are four instrument inputs in two channel groups plus a fifth stereo input marked ‘Accordion’, and a mono/stereo slider switch. In the Stereo position, the two channels are routed to separate power amplifiers. In the Mono position, the signal is routed to both amps for a total of 30 watts. As well, the control panel carries a pair of RCA jacks as a phono or turntable input. Each of the two preamp channels has controls for volume, plus treble and bass on concentric pots. The Tremolo control is also concentric, for frequency and depth, while the Reverb control is solely intensity.
This Gibson GA79RVT amp has been recently serviced and appears original except for the important safety upgrade to a 3-conductor, grounded AC power cable. It is in quite good condition with most of the physical wear to the handle. The original footswitch for Reverb and Tremolo is included, and its special holder in the lower rear cover is intact.
Recapping A Vintage Gibson GA-79RTV Stereo Combo
We polled our readers to find the coolest guitar shops in the US, and here are the first half of the results, in no particular order.
GIBSON GA-79RVT Stereo Cab plans or dims
Not sure what all the controls are on top as all the photos I have are not quite clear enough. Click to expand…
Yep, not exactly a perfect photo, But I figured after looking at the schematic it should be fairly easy to determine what knob is what and what the input jacks are.Im not done looking for more info on this one though, It seems to me that the amp was also released under another name also. I searched Kalamazoo to find those last photo’s.One thing that was common of Gibson back then was farming out electronics and amplifiers to other companies. I suspect it might have even been a Chicago made amplifier, Though there is little documentation on that specific amp.That one interests me a lot, Enough to build one!Lets keep in contact, Compare notes and see if we can come up with a couple nice sounding units for ourselves.Trout
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