Vintage Tube Amp

This Fender Bronco Tube Amp is in great shape for its age; this is the same as a Vibro Champ, the only difference is the front metal plate. It is a 1971 manufactured combo amp: The chassis is stamped June 14, 1971. The Speaker is an Oxford, dated the 18th week of 1971 (4657118). The output transformer is dated 6th week of 1971 (606-1-06). The power transformer is dated the 20th week of 1971 (606-1-20). The 2 12AX7 preamp tubes seem to be replacements from original, but the 6V6 output and the 5Y3 rectifier tube appear to be original (in my opinion). The only flaws are some pitting in the metal amp straps and the handle metal end caps. There is also an area where the tolex is separated on the top corner (shown in the last picture). The amp sounds great with an electric guitar, all controls work and it’s quiet when idling. The pots and tube sockets were treated with contact cleaner (spray). The serial number is: A30098. The grille cloth backing is slightly warped; look at the lower right corner of the amp in the first picture. This could probably be fixed by attaching the corner better staples? Since 2 tubes (the 12AX7′s) have been replaced from originals, this is considered to be 99% original. The item “Vintage Fender Bronco (VibroChamp) Guitar Amp Silverface 1971 Tube Amp 99% Orig” is in sale since Thursday, October 28, 2021. This item is in the category “Musical Instruments & Gear\Vintage Musical Instruments\Vintage Guitars & Basses\Guitar Amplifiers”. The seller is “colorado_architect” and is located in Littleton, Colorado. This item can be shipped to United States.

• Model: 1971 Bronco
• Modified Item: No
• Country/Region of Manufacture: United States
• Exact Year: 1971
• Number of Speakers: 1
• Amplifier Type: Combo
• Suitable For: Electric Guitar
• Amplifier Technology: Vacuum Tube
• MPN: Does Not Apply
• Brand: Fender

BEHOLD THE VINTAGE 1971 SELMER’CHIEFTAIN” 200 WATT ALL TUBE “WRECKING BALL IN EXCELLENT, ALL ORIGINAL CONDITION, MADE IN ENGLAND. THIS IS THE MOST POWERFUL, LOUDEST AND HEAVIEST AMPLIFIER I HAVE EVER COME ACROSS IN MY ENTIRE LIFE. IT ALSO HAS THE LARGEST TRANSFORMERS IVE EVER SEEN AS WELL. IN ADDITION, IT’S A RARITY. I HAVE NEVER SEEN ANOTHER ONE. THIS ALL TUBE VINTAGE BEAST RUNS ON EIGHT EL34 OUTPUT TUBES (PLEASE SEE THE PHOTOS) AND PUTS OUT WAY OVER 200 WATTS BY WAY OF ITS ENORMOUS AND ORIGINAL TRANSFORMERS. I BELIEVE THERE ARE ACTUALLY 2 SEPARATE OUTPUT TRANSFORMERS WORKING SIMULTANEOUSLY! THE UNIQUE FACTOR IN MY VIEW TO THIS AMP IS HOW MUCH POWER IS THERE AND HOW THE AMP PROVIDES AMAZING SUSTAIN ON ITS CLEAN TONES BEFORE IT GETS PUSHED INTO OUTPUT DISTORTION WHICH IS ALSO BRILLIANT AND SIGNATURE SOUNDING. AT ITS CORE ITS A CLASSIC VINTAGE SELMER SOUNDING TONE CIRCUIT. IF YOU’VE EVER PLAYED THRU OR HEARD A SELMER TREBLE AND BASS 50 OR 100 WATT CIRCUIT FROM THE LATE 60′S EARLY 70′S, IT’S TRUE TO THAT CHARACTER BUT THE POWER BEHIND THESE 200 WATTS IS WHAT SETS IT APART. THIS IS A 4 CHANNEL AMP WITH 2 CHANNELS CONTROLLED BY VOLUME, BASS AND TREBLE CONTROLS AND 2 “SELECTOR TONE” CHANNELS WITH NOTCHED EQ PRESETS THAT ALSO OFFER VOLUME, BASS AND TREBLE CONTROLS. THE SELECTOR TONE CHANNELS ARE LIKE HAVING A VAIRITONE CONTROL AS FOUND ON A ES 345 GUITAR BUT ON YOUR AMP INSTEAD. ALL “SELECTOR TONE” PRESETS PRODUCE HIGH PEDIGREE RECORDING QUALITY TONES. ALL THE AMPS TONES ARE GREAT AND VERY USEFUL. CONDITION WISE, I DON’T THINK THIS AMP EVER LEFT IT’S HOME OR THE RECORDING STUDIO. I DOUBT ITS EVER TRAVELED ON TOUR. ITS IN EXCELLENT MECHANICAL AND COSMETIC CONDITION. I JUST INSTALLED 8 BRAND NEW JJ EL34′S POWER TUBES, I BELIEVE THE CIRCUIT IS 100% ORIGINAL. YOU REALLY NEED TO RUN THE AMP WITH 2 CABS OR YOU ARE LIKELY TO BLOW A SINGLE 4X12 AND POSSIBLY ONE OF THE OUTPUT TRANSFORMERS. THE AMP WAS BUILT TO RUN ON 2 CABS. IT WAS ADVERTISED AS AN ALL PURPOSE AMP BUT ITS FRONT PANEL LAYOUT IS VERY REMINISCENT TO A EARLY 70′S SELMER TREBLE AND BASS 50 OR 100 WATT. The item “VINTAGE 1971 SELMER CHIEFTAIN 200 WATT AMPLIFIER ALL ORIG. ALL TUBE MAJOR” is in sale since Sunday, October 18, 2020. This item is in the category “Musical Instruments & Gear\Guitars & Basses\Guitar Amplifiers”. The seller is “torchbro” and is located in Studio City, California. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Bahrain, Croatia, Malaysia, Chile, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay, Ukraine, Cayman islands.

• Number of Channels: 4
• MPN: Does Not Apply
• Power: 200 W
• Amplifier Type: Head
• Brand: SELMER

Beautiful and rare british valve amp and preamp alln original partridge transformers and tested vintage tubes, works and sounds great make offer. The item “Chapman Stereo Audio Tube Pre-Amp- and Valve amp Orig Vintage England” is in sale since Tuesday, February 19, 2019. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets”. The seller is “erictheredps” and is located in Palm Springs, California. This item can’t be shipped, the buyer must pick up the item.

1957 National Aztec Valco 1240T in great, original condition. Aztec, was a National designed amp manufactured by Valco and has a completely different large single speaker approach than earlier Aztec 3 speaker oval speaker type construction. This is the National design built by Valco with Orange identification for each tube socket. Multiple pre amp tubes (some NOS) are included, and offer shielded (can-type) or un-shielded socketing. Cabinet is 18x20x9 which tapers at the top on the back side to 8 inch depth where a mirrored panel provides 2 Regular Inputs, 1 Treble Input, and 1 Microphone Input. 1 Volume & Tone adjust the 3 Instrument Inputs, while 1 Mic Volume Control adjusts the single microphone Input. The “Tone Control” works across all channels, including the Microphone Input. The cabinet houses a single 15 speaker with a closely mounted output transformer mounted to the side of the cab. The upper deck houses the Controls and Power/Fuse/Indicator and other controls. There is a Tremolo footswitch and separate switchable Volume/Depth control with on/off. Power for the unit is operated by the Instrument Volume control. There are three Shielded Tubes also contained in the upper deck. The lower deck at the base houses the power supply and power output tubes, rectifier and transformer. Comes with original 9 foot 2 prong cord. (a three prong grounded adapter will be properly plugged-in). Designed and manufactured for 6L6-type tubes this amp has the higher output version, more closely matching the popular British KT-66. These 6L6 type are 7581A Tubes matched for this National. The 35 watt 7581 over the 30 watt 6L6 usually carry about a 20% higher cost. USA branded logo on the tube glass. Speaker is a 15 inch alnico type. 7581A spec design refers to the 5% higher output over 6L6 type, in all other ways, specification wise, they are functionally equivalent to 6L6 but closer to the KT-66. Speaker directly wired to a secondary off the stand alone mounted output transformer. All the small signal tubes are shielded. 2 are in Can-type octal-sockets and one has a surround shield in a 9-pin. Pictures in the upper deck show the tube type in Orange on a shielded frame under the top of the amp. The AMP base tubes are also are labeled in bright Orange. The amp is relatively quiet until about mid-volume when it begins to demonstrate its power. The Tone range is very broad and pleasant. Due to the typical higher amplification demands of a Microphone the gain seems higher on the MIC channel/Volume, and it is hotter and while the regular inputs bring solid strength to the sound, the Mic input really cuts through and offers and leans towards distortion at higher levels, with an edge. This model utilizes a permanent magnet as demonstrated by holding the knife on its edge in one of the photos. The tweed and faux wood grain have seen their share of loving use and a bit of abuse as well, with corners now well worn as is common for amps with over forty years of use. At this point, the tremolo will wobble about once or twice when the control is switched on, and then stops with no effect on the sound beyond the initial vibes. It has been this way for at least 10 years, and I really never use it anyway, so I never had it serviced, and I did not want the circuitry touched. (no irons have been laid it). I use a 2-3way grounded adapter with it to ensure it is plugged into AC correctly, reversed it’s capable of a shock. In a studio environment, the Aztec was always chassis grounded and’float’ not possible for side chain, and was run’cold’ chassis. The Instrument input uses a 5879 shared with the tremolo circuit, the regular inputs are direct coupled and the treble is. This is the warm tube used in Gibson’s Les Paul amp. The Mic input uses a 6SJ7 and has a grounded cathode without bypass and is de-coupled with a. 01uf capacitor at input. In schematic, it’s even easier to see, the “I” channel and the “M” channel meet up at the post amp before mains at a point where the “Tone Control” is designed to do it’s job. The versatility works great in studio settings. The smoother tone of the 5879 channel can fit many situations, while the hotter 6SJ7 overloads nice. This amp is best suited to anyone looking for’tone’ over distortion. Here is an observation from an individual talking about the 5879 pentode. A 5879 is used in Gibsons GA-40 of the late fifties. This pentode fits the same 9-pin socket as dual triodes (12AX7), but require very different circuitry. The 5879 is known for thick, robust sound and have higher gain factors than a 12AX7, but arent prone to distorting the way that dual-triodes can. A complete set of pre-amp t ubes matching this amp are included in boxes in addition to the ones currently in socket. Note: NO 7581A tubes and NO 6L6 are in ANY “boxed items ” – it ships with 2 7581′s in socket only. The boxed items are New original Old Stock pre amp tubes , and offer replacement for top level Pre-Amp section, one has both GT and CAN choice, for the 9-pin, one tube is used and good, and offers a NOS choice as well. Thanks for looking, and God bless you. Note: If considering for professional road work, I would match it with an Anvil case, have an isolation transformer mounted inside and earth ground the chassis. If the price is too high, then it’s not for you, but thanks for looking and your attention is very much appreciated. It will also have the phased (2-3 way) adapter properly connected to the amp’s original non-phased power plug for safe AC use. The item “Vintage ORIG 1957 National Aztec Tweed 15 Valco Guitar Amp 7581A Tubes (KT-66)” is in sale since Friday, October 13, 2017. This item is in the category “Musical Instruments & Gear\Guitars & Basses\Guitar Amplifiers”. The seller is “zzeon” and is located in Chelmsford, Massachusetts. This item can be shipped to United States.

• Brand: National
• Amplifier Type: Combo
• Amplifier Technology: Vacuum Tube
• Type: Electric Guitar Amplifier
• Number of Channels: 4
• Suitable For: Performance
• Model: Aztec1240T
• Country/Region of Manufacture: United States
• Impedance (ohms): on secondary side of transformer – .7 ohm