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Vintage 1960s QUAD Tung-Sol 6550 SOLID PLATE precision matched current & GM original boxes Strong 110%

List price: $1,400.00
$1,200.00
You save: $200.00 (14%)
tubequadtungsol65507
Out-of-stock
Add to wish list

A beautiful quad set of tested, matched genuine, late 1950's to early 60's era.... boxed, original Tung-Sol 6550 power tubes. Documentation shown in photos is included. 

Study all of the photos below and view test reports. These are the ultra sought after originals, now over 50 years old! ... Solid, 35mm tall SMOOTH plates, with 3 getters, super thick, SHINNY mirror flashing early white ink bases, Close DATE CODES , all from the early 60's (see reports below, exhibit F) .   They present beautifully.

Yes indeed, they are the real McCoy that everybody wants. Beautiful examples are seldom found in this condition -- probably the prettiest and most throughly tested anywhere.  The tests indicate very strong performance and super long projected life -- they are low hours or NOS.

When I listeded to this set, they sounded really wonderful -- and very powerful  ---- These are  guaranteed NO DOA.  They'll provide the tone and stellar lifespan you can rely only on very old Tung-Sol, vintage USA originals for.

If you are currently using modern reproductions, these are magnetudes better.  

This is a completely ip & GM Transconductance (see Reports in exhibit A,B, & F)  MATCHED, original 50-60 year old QUAD set. Cosmetics, boxes, production date codes (all matched)  & audio performance ... everything's incredibly CLOSE.

The best QUAD you will see for a very long time -- if you want perfect, jump on them as they'll sell quickly.  

For easy reference,  view Exhibit B for ACTUAL tube under a full load Dynamic Emmisions test ...   ... All units are at testing at (or above) this 110% level of indication (of new)  indicating matched GM & Plate current performance.

This quad features red-ink tipped base keys -- which further indicates they were lab matched and intended for precision amplification equipment. ( See exhibit F )....

If you're viewing these 1960's USA originals, then I'm sure your aware that modern re-issues are not made in the USA and are only copies from the eastern-bloc Europe (or Russia).  

These units, are actual original production from the early 50s and ending before the mid part of the decade. The Solid, SMOOTH plate construction give these  guaranteed late 1950s or very EARLY 1960's date of production. Tung-Sol designed the 6550 tube like no other -- and unlike lot's of other cold-war design output tubes ..... they were made intentionally for 1950's HiFi, high power audio reproduction = better bass and lots of throaty midrange, and very defined highs.

Audiophiles have known for a long time that earliest possible 6550's are the ones to own.  The original production design (introduced by Tung-Sol in the early 1950's), will outlast and outperform, and of course sound better than typical slipshod re-issues or reproductions of any similar design. 

These now antique tubes were made to the highest 1950's US quality standards .... and Tung-Sol's have a wonderfuly accurate sound quality, with amazing resolution & powerful bass control -- a signature of the 6550 pentode. The 6550 was part of the twilight ... the last harrah of powerful pentodes! Tung Sol, an old world industry giant. And was an artisian company when it came to tubes! Really they were a laboratory engaged in produciton ---  really next to Western Electric in quality control and ethics!  Located in New Jersey, and  they did not survive in the tube audio business much beyond the 1960s era ... they lost out to industry giants as the solid state era ushered in -- destroying the market for perfect tubes! (They're excellent transistors didn't sell well.)

These hefy beauties were carefully stored for years in old boxes.(boxes have some tears -- they're very old!)

Verified ... No noise, great function, in circuit.  NO SHORTS, all units checked perfect beyond 2 megohms in Jackson machine. ) Tests made in multiple calibrated testers, MATCHING done on a calibrated lab tester.

  Again, these are ultra low hours spares,  they're like new in the box, and perhaps NOS.... as the shinny & thick flashing on all sides  indicate.  See photos.  The gorgeous nickle plated, white ink & bakelite bases are tight .  The cosmetics of these tubes are outstanding!

 These vintage 6550's are the kings of hifi pentodes -  owners will hear enhanced clarity, great tone, and punchy bass. 

This beautiful matched QUAD set will sell very quickly. It's the nicest set you'll see anywhere ,even includion the original boxes! 

See our 100% feedback, to be assured SAFE PACKING & DELIVERY. These are likely the best Tung-Sol's in boxes .. and most throughly tested you'll see anywhere.  -- They will be TRIPLE BOXED in strong 275lb triwall cartons.

Please study photos below. SAFE PURCHASE, 100% - *** Domestic or OVERSEAS OK. FAST SHIPPING, WILL DISPATCH IMMEDIATELY after PAYMENT -- OVERSEAS OK, FULL TRACKING number via email after shipment.

 

 

 

 

 

 

 

 

 

 

 

All vintage USA audio 1930s ~ 1980s

Save 14%

Vintage 1960s QUAD Tung-Sol 6550 SOLID PLATE precision matched current & GM original boxes Strong 110%

List price: $1,400.00
$1,200.00
You save: $200.00 (14%)
tubequadtungsol65507
Out-of-stock
Add to wish list

A beautiful quad set of tested, matched genuine, late 1950's to early 60's era.... boxed, original Tung-Sol 6550 power tubes. Documentation shown in photos is included. 

Study all of the photos below and view test reports. These are the ultra sought after originals, now over 50 years old! ... Solid, 35mm tall SMOOTH plates, with 3 getters, super thick, SHINNY mirror flashing early white ink bases, Close DATE CODES , all from the early 60's (see reports below, exhibit F) .   They present beautifully.

Yes indeed, they are the real McCoy that everybody wants. Beautiful examples are seldom found in this condition -- probably the prettiest and most throughly tested anywhere.  The tests indicate very strong performance and super long projected life -- they are low hours or NOS.

When I listeded to this set, they sounded really wonderful -- and very powerful  ---- These are  guaranteed NO DOA.  They'll provide the tone and stellar lifespan you can rely only on very old Tung-Sol, vintage USA originals for.

If you are currently using modern reproductions, these are magnetudes better.  

This is a completely ip & GM Transconductance (see Reports in exhibit A,B, & F)  MATCHED, original 50-60 year old QUAD set. Cosmetics, boxes, production date codes (all matched)  & audio performance ... everything's incredibly CLOSE.

The best QUAD you will see for a very long time -- if you want perfect, jump on them as they'll sell quickly.  

For easy reference,  view Exhibit B for ACTUAL tube under a full load Dynamic Emmisions test ...   ... All units are at testing at (or above) this 110% level of indication (of new)  indicating matched GM & Plate current performance.

This quad features red-ink tipped base keys -- which further indicates they were lab matched and intended for precision amplification equipment. ( See exhibit F )....

If you're viewing these 1960's USA originals, then I'm sure your aware that modern re-issues are not made in the USA and are only copies from the eastern-bloc Europe (or Russia).  

These units, are actual original production from the early 50s and ending before the mid part of the decade. The Solid, SMOOTH plate construction give these  guaranteed late 1950s or very EARLY 1960's date of production. Tung-Sol designed the 6550 tube like no other -- and unlike lot's of other cold-war design output tubes ..... they were made intentionally for 1950's HiFi, high power audio reproduction = better bass and lots of throaty midrange, and very defined highs.

Audiophiles have known for a long time that earliest possible 6550's are the ones to own.  The original production design (introduced by Tung-Sol in the early 1950's), will outlast and outperform, and of course sound better than typical slipshod re-issues or reproductions of any similar design. 

These now antique tubes were made to the highest 1950's US quality standards .... and Tung-Sol's have a wonderfuly accurate sound quality, with amazing resolution & powerful bass control -- a signature of the 6550 pentode. The 6550 was part of the twilight ... the last harrah of powerful pentodes! Tung Sol, an old world industry giant. And was an artisian company when it came to tubes! Really they were a laboratory engaged in produciton ---  really next to Western Electric in quality control and ethics!  Located in New Jersey, and  they did not survive in the tube audio business much beyond the 1960s era ... they lost out to industry giants as the solid state era ushered in -- destroying the market for perfect tubes! (They're excellent transistors didn't sell well.)

These hefy beauties were carefully stored for years in old boxes.(boxes have some tears -- they're very old!)

Verified ... No noise, great function, in circuit.  NO SHORTS, all units checked perfect beyond 2 megohms in Jackson machine. ) Tests made in multiple calibrated testers, MATCHING done on a calibrated lab tester.

  Again, these are ultra low hours spares,  they're like new in the box, and perhaps NOS.... as the shinny & thick flashing on all sides  indicate.  See photos.  The gorgeous nickle plated, white ink & bakelite bases are tight .  The cosmetics of these tubes are outstanding!

 These vintage 6550's are the kings of hifi pentodes -  owners will hear enhanced clarity, great tone, and punchy bass. 

This beautiful matched QUAD set will sell very quickly. It's the nicest set you'll see anywhere ,even includion the original boxes! 

See our 100% feedback, to be assured SAFE PACKING & DELIVERY. These are likely the best Tung-Sol's in boxes .. and most throughly tested you'll see anywhere.  -- They will be TRIPLE BOXED in strong 275lb triwall cartons.

Please study photos below. SAFE PURCHASE, 100% - *** Domestic or OVERSEAS OK. FAST SHIPPING, WILL DISPATCH IMMEDIATELY after PAYMENT -- OVERSEAS OK, FULL TRACKING number via email after shipment.